From a4b8cdfb33dbac459b136d476241df5a8741c664 Mon Sep 17 00:00:00 2001
From: Matthew Miller <mmiller@duosecurity.com>
Date: Tue, 12 Sep 2023 13:59:38 +0000
Subject: [PATCH] Merge pull request #1932 from w3c/1852-emphasize-user-name

SHA: 58d60d0eee4418531db98973bca5e6382c62de09
Reason: push, by MasterKale

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 index.html | 759 +++++++++++++++++++++++++++--------------------------
 1 file changed, 383 insertions(+), 376 deletions(-)

diff --git a/index.html b/index.html
index 8b6ecf306..afa886322 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@
   <meta content="ED" name="w3c-status">
   <meta content="Bikeshed version 82ce88815, updated Thu Sep 7 16:33:55 2023 -0700" name="generator">
   <link href="https://www.w3.org/TR/webauthn-3/" rel="canonical">
-  <meta content="db2629522c1083227cb227a6f0b78a6b47e71091" name="document-revision">
+  <meta content="58d60d0eee4418531db98973bca5e6382c62de09" name="document-revision">
 <style type="text/css">
 body {
     counter-reset: table;
@@ -3486,7 +3486,7 @@ <h4 class="heading settled" data-level="5.1.7" id="sctn-isUserVerifyingPlatformA
    <h4 class="heading settled" data-level="5.1.8" id="sctn-isPasskeyPlatformAuthenticatorAvailable"><span class="secno">5.1.8. </span><span class="content">Availability of a <a data-link-type="dfn" href="#passkey-platform-authenticator" id="ref-for-passkey-platform-authenticator">passkey platform authenticator</a> - PublicKeyCredential’s <code>isPasskeyPlatformAuthenticatorAvailable()</code> Method</span><a class="self-link" href="#sctn-isPasskeyPlatformAuthenticatorAvailable"></a></h4>
    <div data-link-for-hint="WebAuthentication/isPasskeyPlatformAuthenticatorAvailable">
     <p><a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party①④">WebAuthn Relying Parties</a> use this method to determine whether they can create a new <a data-link-type="dfn" href="#passkey" id="ref-for-passkey">passkey</a> using a <a data-link-type="dfn" href="#user-verifying-platform-authenticator" id="ref-for-user-verifying-platform-authenticator⑤">user-verifying platform authenticator</a> or a <code class="idl"><a data-link-type="idl" href="#dom-authenticatortransport-hybrid" id="ref-for-dom-authenticatortransport-hybrid">hybrid</a></code> authenticator.
-Upon invocation, the <a data-link-type="dfn" href="#client" id="ref-for-client②⑧">client</a> employs a <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⓪">client platform</a>-specific procedure to discover available <a data-link-type="dfn" href="#user-verifying-platform-authenticator" id="ref-for-user-verifying-platform-authenticator⑥">user-verifying platform authenticators</a> and the 
+Upon invocation, the <a data-link-type="dfn" href="#client" id="ref-for-client②⑧">client</a> employs a <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⓪">client platform</a>-specific procedure to discover available <a data-link-type="dfn" href="#user-verifying-platform-authenticator" id="ref-for-user-verifying-platform-authenticator⑥">user-verifying platform authenticators</a> and the
 availability of <code class="idl"><a data-link-type="idl" href="#dom-authenticatortransport-hybrid" id="ref-for-dom-authenticatortransport-hybrid①">hybrid</a></code> transport.
 If one or both are discovered, the promise is resolved with the value of <code>true</code>.
 If neither is discovered, the promise is resolved with the value of <code>false</code>.
@@ -3827,9 +3827,12 @@ <h4 class="heading settled" data-level="5.4.1" id="dictionary-pkcredentialentity
 including the value as a parameter of the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential⑦">authenticatorMakeCredential</a> operation.</p>
         </ul>
        <li data-md>
-        <p>When inherited by <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity②">PublicKeyCredentialUserEntity</a></code>, it is a <a data-link-type="dfn" href="#human-palatability" id="ref-for-human-palatability③">human-palatable</a> identifier for a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑦">user account</a>. It is intended only for display, i.e., aiding the user in determining the difference between user
-accounts with similar <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname④">displayName</a></code>s. For example, "alexm", "alex.mueller@example.com"
-or "+14255551234".</p>
+        <p>When inherited by <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity②">PublicKeyCredentialUserEntity</a></code>, it is a <a data-link-type="dfn" href="#human-palatability" id="ref-for-human-palatability③">human-palatable</a> identifier for a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑦">user account</a>. This
+identifier is the primary value displayed to users by <a data-link-type="dfn" href="#client" id="ref-for-client④①">Clients</a> to help users
+understand with which <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑧">user account</a> a credential is associated.</p>
+        <p>Examples of suitable values for this identifier include, "alexm", "+14255551234",
+"alex.mueller@example.com", "alex.mueller@example.com (prod-env)",
+or "alex.mueller@example.com (ОАО Примертех)".</p>
         <ul>
          <li data-md>
           <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③①">Relying Party</a> MAY let the user choose this value. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③②">Relying Party</a> SHOULD perform enforcement,
@@ -3839,12 +3842,12 @@ <h4 class="heading settled" data-level="5.4.1" id="dictionary-pkcredentialentity
          <li data-md>
           <p>This string MAY contain language and direction metadata. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③③">Relying Parties</a> SHOULD consider providing this information. See <a href="#sctn-strings-langdir">§ 6.4.2 Language and Direction Encoding</a> about how this metadata is encoded.</p>
          <li data-md>
-          <p><a data-link-type="dfn" href="#client" id="ref-for-client④①">Clients</a> SHOULD perform enforcement, as prescribed in Section 3.4.3 of <a data-link-type="biblio" href="#biblio-rfc8265" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and Passwords">[RFC8265]</a> for the UsernameCasePreserved Profile of the PRECIS IdentifierClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
+          <p><a data-link-type="dfn" href="#client" id="ref-for-client④②">Clients</a> SHOULD perform enforcement, as prescribed in Section 3.4.3 of <a data-link-type="biblio" href="#biblio-rfc8265" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and Passwords">[RFC8265]</a> for the UsernameCasePreserved Profile of the PRECIS IdentifierClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
 on <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name⑧">name</a></code>'s value prior to displaying the value to the user or
 including the value as a parameter of the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential⑧">authenticatorMakeCredential</a> operation.</p>
         </ul>
       </ul>
-      <p>When <a data-link-type="dfn" href="#client" id="ref-for-client④②">clients</a>, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③③">client platforms</a>, or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①①">authenticators</a> display a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name⑨">name</a></code>'s value, they should always use UI elements to provide a clear boundary around the displayed value, and not allow overflow into other elements <a data-link-type="biblio" href="#biblio-css-overflow-3" title="CSS Overflow Module Level 3">[css-overflow-3]</a>.</p>
+      <p>When <a data-link-type="dfn" href="#client" id="ref-for-client④③">clients</a>, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③③">client platforms</a>, or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①①">authenticators</a> display a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name⑨">name</a></code>'s value, they should always use UI elements to provide a clear boundary around the displayed value, and not allow overflow into other elements <a data-link-type="biblio" href="#biblio-css-overflow-3" title="CSS Overflow Module Level 3">[css-overflow-3]</a>.</p>
       <p>Authenticators MAY truncate a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①⓪">name</a></code> member’s value so that it fits within 64 bytes, if the authenticator stores the value. See <a href="#sctn-strings-truncation">§ 6.4.1 String Truncation</a> about truncation and other considerations.</p>
     </dl>
    </div>
@@ -3862,44 +3865,48 @@ <h4 class="heading settled" data-level="5.4.2" id="dictionary-rp-credential-para
     </dl>
    </div>
    <h4 class="heading settled" data-level="5.4.3" id="dictionary-user-credential-params"><span class="secno">5.4.3. </span><span class="content">User Account Parameters for Credential Generation (dictionary <dfn class="dfn-paneled idl-code" data-dfn-type="dictionary" data-export id="dictdef-publickeycredentialuserentity"><code>PublicKeyCredentialUserEntity</code></dfn>)</span><a class="self-link" href="#dictionary-user-credential-params"></a></h4>
-   <p>The <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity③">PublicKeyCredentialUserEntity</a></code> dictionary is used to supply additional <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑧">user account</a> attributes when creating a new
+   <p>The <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity③">PublicKeyCredentialUserEntity</a></code> dictionary is used to supply additional <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑨">user account</a> attributes when creating a new
 credential.</p>
 <pre class="idl highlight def"><c- b>dictionary</c-> <a class="idl-code" data-link-type="dictionary" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity④"><c- g>PublicKeyCredentialUserEntity</c-></a> : <a data-link-type="idl-name" href="#dictdef-publickeycredentialentity" id="ref-for-dictdef-publickeycredentialentity④"><c- n>PublicKeyCredentialEntity</c-></a> {
     <c- b>required</c-> <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource④"><c- n>BufferSource</c-></a>   <a class="idl-code" data-link-type="dict-member" data-type="BufferSource   " href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id⑥"><c- g>id</c-></a>;
-    <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④⓪"><c- b>DOMString</c-></a>      <a class="idl-code" data-link-type="dict-member" data-type="DOMString      " href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑤"><c- g>displayName</c-></a>;
+    <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④⓪"><c- b>DOMString</c-></a>      <a class="idl-code" data-link-type="dict-member" data-type="DOMString      " href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname④"><c- g>displayName</c-></a>;
 };
 </pre>
    <div>
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialUserEntity" data-dfn-type="dict-member" data-export id="dom-publickeycredentialuserentity-id"><code>id</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource⑤">BufferSource</a></span>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①④">user handle</a> of the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account①⑨">user account</a>.
+      <p>The <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①④">user handle</a> of the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⓪">user account</a>.
 A <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑤">user handle</a> is an opaque <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#byte-sequence" id="ref-for-byte-sequence②">byte sequence</a> with a maximum size of 64 bytes,
 and is not meant to be displayed to the user.</p>
       <p>To ensure secure operation, authentication and authorization
-decisions MUST be made on the basis of this <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id⑦">id</a></code> member,  not the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑥">displayName</a></code> nor <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①①">name</a></code> members. See Section 6.1 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a>.</p>
+decisions MUST be made on the basis of this <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id⑦">id</a></code> member,  not the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑤">displayName</a></code> nor <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①①">name</a></code> members. See Section 6.1 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a>.</p>
       <p>The <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑥">user handle</a> MUST NOT contain personally identifying information about the user, such as a username or e-mail address;
 see <a href="#sctn-user-handle-privacy">§ 14.6.1 User Handle Contents</a> for details. The <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑦">user handle</a> MUST NOT be empty.</p>
-      <p class="note" role="note"><span class="marker">Note:</span> the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑧">user handle</a> <i>ought not</i> be a constant value across different <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⓪">user accounts</a>,
+      <p class="note" role="note"><span class="marker">Note:</span> the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑧">user handle</a> <i>ought not</i> be a constant value across different <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②①">user accounts</a>,
 even for <a data-link-type="dfn" href="#non-discoverable-credential" id="ref-for-non-discoverable-credential③">non-discoverable credentials</a>, because some authenticators always create <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential⑦">discoverable credentials</a>.
 Thus a constant <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle①⑨">user handle</a> would prevent a user from using such an authenticator
-with more than one <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②①">user account</a> at the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑥">Relying Party</a>.</p>
+with more than one <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②②">user account</a> at the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑥">Relying Party</a>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialUserEntity" data-dfn-type="dict-member" data-export id="dom-publickeycredentialuserentity-displayname"><code>displayName</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④①">DOMString</a></span>
      <dd data-md>
-      <p>A <a data-link-type="dfn" href="#human-palatability" id="ref-for-human-palatability④">human-palatable</a> name for the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②②">user account</a>, intended only for display. For example, "Alex Müller" or "田中倫". The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑦">Relying Party</a> SHOULD let the user choose this, and SHOULD NOT restrict the choice more than necessary.</p>
+      <p>A <a data-link-type="dfn" href="#human-palatability" id="ref-for-human-palatability④">human-palatable</a> name for the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②③">user account</a>, intended only for
+display. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑦">Relying Party</a> SHOULD let the user choose this, and SHOULD NOT restrict the choice
+more than necessary. If no suitable or <a data-link-type="dfn" href="#human-palatability" id="ref-for-human-palatability⑤">human-palatable</a> name is
+available, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑧">Relying Party</a> SHOULD set this value to an empty string.</p>
+      <p>Examples of suitable values for this identifier include, "Alex Müller", "Alex Müller (ACME Co.)" or "田中倫".</p>
       <ul>
        <li data-md>
-        <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑧">Relying Parties</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
-when setting <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑦">displayName</a></code>'s value, or displaying the value to the user.</p>
+        <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑨">Relying Parties</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
+when setting <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑥">displayName</a></code>'s value, or displaying the value to the user.</p>
        <li data-md>
-        <p>This string MAY contain language and direction metadata. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①③⑨">Relying Parties</a> SHOULD consider providing this information. See <a href="#sctn-strings-langdir">§ 6.4.2 Language and Direction Encoding</a> about how this metadata is encoded.</p>
+        <p>This string MAY contain language and direction metadata. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⓪">Relying Parties</a> SHOULD consider providing this information. See <a href="#sctn-strings-langdir">§ 6.4.2 Language and Direction Encoding</a> about how this metadata is encoded.</p>
        <li data-md>
-        <p><a data-link-type="dfn" href="#client" id="ref-for-client④③">Clients</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
-on <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑧">displayName</a></code>'s value prior to displaying the value to the user or
+        <p><a data-link-type="dfn" href="#client" id="ref-for-client④④">Clients</a> SHOULD perform enforcement, as prescribed in Section 2.3 of <a data-link-type="biblio" href="#biblio-rfc8266" title="Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames">[RFC8266]</a> for the Nickname Profile of the PRECIS FreeformClass <a data-link-type="biblio" href="#biblio-rfc8264" title="PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols">[RFC8264]</a>,
+on <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑦">displayName</a></code>'s value prior to displaying the value to the user or
 including the value as a parameter of the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential⑨">authenticatorMakeCredential</a> operation.</p>
       </ul>
-      <p>When <a data-link-type="dfn" href="#client" id="ref-for-client④④">clients</a>, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③④">client platforms</a>, or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①②">authenticators</a> display a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑨">displayName</a></code>'s value, they should always use UI elements to provide a clear boundary around the displayed value, and not allow overflow into other elements <a data-link-type="biblio" href="#biblio-css-overflow-3" title="CSS Overflow Module Level 3">[css-overflow-3]</a>.</p>
-      <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①③">Authenticators</a> MUST accept and store a 64-byte minimum length for a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①⓪">displayName</a></code> member’s value. Authenticators MAY truncate a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①①">displayName</a></code> member’s value so that it fits within 64 bytes. See <a href="#sctn-strings-truncation">§ 6.4.1 String Truncation</a> about truncation and other considerations.</p>
+      <p>When <a data-link-type="dfn" href="#client" id="ref-for-client④⑤">clients</a>, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③④">client platforms</a>, or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①②">authenticators</a> display a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑧">displayName</a></code>'s value, they should always use UI elements to provide a clear boundary around the displayed value, and not allow overflow into other elements <a data-link-type="biblio" href="#biblio-css-overflow-3" title="CSS Overflow Module Level 3">[css-overflow-3]</a>.</p>
+      <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①③">Authenticators</a> MUST accept and store a 64-byte minimum length for a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname⑨">displayName</a></code> member’s value. Authenticators MAY truncate a <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①⓪">displayName</a></code> member’s value so that it fits within 64 bytes. See <a href="#sctn-strings-truncation">§ 6.4.1 String Truncation</a> about truncation and other considerations.</p>
     </dl>
    </div>
    <h4 class="heading settled" data-level="5.4.4" id="dictionary-authenticatorSelection"><span class="secno">5.4.4. </span><span class="content">Authenticator Selection Criteria (dictionary <dfn class="dfn-paneled idl-code" data-dfn-type="dictionary" data-export id="dictdef-authenticatorselectioncriteria"><code>AuthenticatorSelectionCriteria</code></dfn>)</span><a class="self-link" href="#dictionary-authenticatorSelection"></a></h4>
@@ -3925,20 +3932,20 @@ <h4 class="heading settled" data-level="5.4.4" id="dictionary-authenticatorSelec
 in a successful <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create①⑦">create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②①">get()</a></code> operation.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticatorSelectionCriteria" data-dfn-type="dict-member" data-export id="dom-authenticatorselectioncriteria-residentkey"><code>residentKey</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④⑥">DOMString</a></span>
      <dd data-md>
-      <p>Specifies the extent to which the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⓪">Relying Party</a> desires to create a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑥">client-side discoverable credential</a>. For historical reasons the naming retains the deprecated “resident” terminology. The value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-residentkeyrequirement" id="ref-for-enumdef-residentkeyrequirement">ResidentKeyRequirement</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑥">client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists②">member does not exist</a>. If no value is given then the effective value is <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-required" id="ref-for-dom-residentkeyrequirement-required②">required</a></code> if <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-requireresidentkey" id="ref-for-dom-authenticatorselectioncriteria-requireresidentkey③">requireResidentKey</a></code> is <code>true</code> or <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-discouraged" id="ref-for-dom-residentkeyrequirement-discouraged②">discouraged</a></code> if it is <code>false</code> or absent.</p>
+      <p>Specifies the extent to which the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④①">Relying Party</a> desires to create a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑥">client-side discoverable credential</a>. For historical reasons the naming retains the deprecated “resident” terminology. The value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-residentkeyrequirement" id="ref-for-enumdef-residentkeyrequirement">ResidentKeyRequirement</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑥">client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists②">member does not exist</a>. If no value is given then the effective value is <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-required" id="ref-for-dom-residentkeyrequirement-required②">required</a></code> if <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-requireresidentkey" id="ref-for-dom-authenticatorselectioncriteria-requireresidentkey③">requireResidentKey</a></code> is <code>true</code> or <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-discouraged" id="ref-for-dom-residentkeyrequirement-discouraged②">discouraged</a></code> if it is <code>false</code> or absent.</p>
       <p>See <code class="idl"><a data-link-type="idl" href="#enumdef-residentkeyrequirement" id="ref-for-enumdef-residentkeyrequirement①">ResidentKeyRequirement</a></code> for the description of <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-residentkey" id="ref-for-dom-authenticatorselectioncriteria-residentkey③">residentKey</a></code>'s values and semantics.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticatorSelectionCriteria" data-dfn-type="dict-member" data-export id="dom-authenticatorselectioncriteria-requireresidentkey"><code>requireResidentKey</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean④">boolean</a>, defaulting to <code>false</code></span>
      <dd data-md>
-      <p>This member is retained for backwards compatibility with WebAuthn Level 1 and, for historical reasons, its naming retains the deprecated “resident” terminology for <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential⑧">discoverable credentials</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④①">Relying Parties</a> SHOULD set it to <code>true</code> if, and only if, <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-residentkey" id="ref-for-dom-authenticatorselectioncriteria-residentkey④">residentKey</a></code> is set to <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-required" id="ref-for-dom-residentkeyrequirement-required③">required</a></code>.</p>
+      <p>This member is retained for backwards compatibility with WebAuthn Level 1 and, for historical reasons, its naming retains the deprecated “resident” terminology for <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential⑧">discoverable credentials</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④②">Relying Parties</a> SHOULD set it to <code>true</code> if, and only if, <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-residentkey" id="ref-for-dom-authenticatorselectioncriteria-residentkey④">residentKey</a></code> is set to <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-required" id="ref-for-dom-residentkeyrequirement-required③">required</a></code>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticatorSelectionCriteria" data-dfn-type="dict-member" data-export id="dom-authenticatorselectioncriteria-userverification"><code>userVerification</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④⑦">DOMString</a>, defaulting to <code>"preferred"</code></span>
      <dd data-md>
-      <p>This member specifies the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④②">Relying Party</a>'s requirements regarding <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②①">user verification</a> for the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create①⑧">create()</a></code> operation.
+      <p>This member specifies the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④③">Relying Party</a>'s requirements regarding <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②①">user verification</a> for the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create①⑧">create()</a></code> operation.
 The value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement">UserVerificationRequirement</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑦">client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists③">member does not exist</a>.</p>
       <p>See <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement①">UserVerificationRequirement</a></code> for the description of <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-userverification" id="ref-for-dom-authenticatorselectioncriteria-userverification③">userVerification</a></code>'s values and semantics.</p>
     </dl>
    </div>
    <h4 class="heading settled" data-level="5.4.5" id="enum-attachment"><span class="secno">5.4.5. </span><span class="content">Authenticator Attachment Enumeration (enum <dfn class="dfn-paneled idl-code" data-dfn-type="enum" data-export id="enumdef-authenticatorattachment"><code>AuthenticatorAttachment</code></dfn>)</span><a class="self-link" href="#enum-attachment"></a></h4>
-   <p>This enumeration’s values describe <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑤">authenticators</a>' <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑥">attachment modalities</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④③">Relying Parties</a> use this to express a preferred <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑦">authenticator attachment modality</a> when calling <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create①⑨">navigator.credentials.create()</a></code> to <a href="#sctn-createCredential">create a credential</a>, and <a data-link-type="dfn" href="#client" id="ref-for-client④⑤">clients</a> use this to report the <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑧">authenticator attachment modality</a> used to complete a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑥">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑥">authentication ceremony</a>.</p>
+   <p>This enumeration’s values describe <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑤">authenticators</a>' <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑥">attachment modalities</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④④">Relying Parties</a> use this to express a preferred <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑦">authenticator attachment modality</a> when calling <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create①⑨">navigator.credentials.create()</a></code> to <a href="#sctn-createCredential">create a credential</a>, and <a data-link-type="dfn" href="#client" id="ref-for-client④⑥">clients</a> use this to report the <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑧">authenticator attachment modality</a> used to complete a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑥">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑥">authentication ceremony</a>.</p>
 <pre class="idl highlight def"><c- b>enum</c-> <a class="idl-code" data-link-type="enum" href="#enumdef-authenticatorattachment" id="ref-for-enumdef-authenticatorattachment④"><c- g>AuthenticatorAttachment</c-></a> {
     <a class="idl-code" data-link-type="enum-value" href="#dom-authenticatorattachment-platform" id="ref-for-dom-authenticatorattachment-platform"><c- s>"platform"</c-></a>,
     <a class="idl-code" data-link-type="enum-value" href="#dom-authenticatorattachment-cross-platform" id="ref-for-dom-authenticatorattachment-cross-platform"><c- s>"cross-platform"</c-></a>
@@ -3956,9 +3963,9 @@ <h4 class="heading settled" data-level="5.4.5" id="enum-attachment"><span class=
     </dl>
    </div>
    <p class="note" role="note"><span class="marker">Note:</span> An <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality⑨">authenticator attachment modality</a> selection option is available only in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-create-slot" id="ref-for-dom-publickeycredential-create-slot③">[[Create]](origin, options,
-sameOriginWithAncestors)</a></code> operation. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④④">Relying Party</a> may use it to, for example, ensure the user has a <a data-link-type="dfn" href="#roaming-credential" id="ref-for-roaming-credential">roaming credential</a> for
+sameOriginWithAncestors)</a></code> operation. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑤">Relying Party</a> may use it to, for example, ensure the user has a <a data-link-type="dfn" href="#roaming-credential" id="ref-for-roaming-credential">roaming credential</a> for
 authenticating on another <a data-link-type="dfn" href="#client-device" id="ref-for-client-device①⑥">client device</a>; or to specifically register a <a data-link-type="dfn" href="#platform-credential" id="ref-for-platform-credential">platform credential</a> for easier reauthentication using a
-particular <a data-link-type="dfn" href="#client-device" id="ref-for-client-device①⑦">client device</a>. The <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-discoverfromexternalsource-slot" id="ref-for-dom-publickeycredential-discoverfromexternalsource-slot⑤">[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</a></code> operation has no <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality①⓪">authenticator attachment modality</a> selection option, so the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑤">Relying Party</a> SHOULD accept any of the user’s registered <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③③">credentials</a>. The <a data-link-type="dfn" href="#client" id="ref-for-client④⑥">client</a> and user will then use whichever is available and convenient at the time.</p>
+particular <a data-link-type="dfn" href="#client-device" id="ref-for-client-device①⑦">client device</a>. The <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-discoverfromexternalsource-slot" id="ref-for-dom-publickeycredential-discoverfromexternalsource-slot⑤">[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</a></code> operation has no <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality①⓪">authenticator attachment modality</a> selection option, so the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑥">Relying Party</a> SHOULD accept any of the user’s registered <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③③">credentials</a>. The <a data-link-type="dfn" href="#client" id="ref-for-client④⑦">client</a> and user will then use whichever is available and convenient at the time.</p>
    <h4 class="heading settled" data-level="5.4.6" id="enum-residentKeyRequirement"><span class="secno">5.4.6. </span><span class="content">Resident Key Requirement Enumeration (enum <dfn class="dfn-paneled idl-code" data-dfn-type="enum" data-export id="enumdef-residentkeyrequirement"><code>ResidentKeyRequirement</code></dfn>)</span><a class="self-link" href="#enum-residentKeyRequirement"></a></h4>
 <pre class="idl highlight def"><c- b>enum</c-> <a class="idl-code" data-link-type="enum" href="#enumdef-residentkeyrequirement" id="ref-for-enumdef-residentkeyrequirement②"><c- g>ResidentKeyRequirement</c-></a> {
     <a class="idl-code" data-link-type="enum-value" href="#dom-residentkeyrequirement-discouraged" id="ref-for-dom-residentkeyrequirement-discouraged③"><c- s>"discouraged"</c-></a>,
@@ -3967,26 +3974,26 @@ <h4 class="heading settled" data-level="5.4.6" id="enum-residentKeyRequirement">
 };
 </pre>
    <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="#enumdef-residentkeyrequirement" id="ref-for-enumdef-residentkeyrequirement③">ResidentKeyRequirement</a></code> enumeration is deliberately not referenced, see <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.</p>
-   <p>This enumeration’s values describe the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑥">Relying Party</a>'s requirements for <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑦">client-side discoverable credentials</a> (formerly known as <a data-link-type="dfn" href="#resident-credential" id="ref-for-resident-credential①">resident credentials</a> or <a data-link-type="dfn" href="#resident-key" id="ref-for-resident-key②">resident keys</a>):</p>
+   <p>This enumeration’s values describe the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑦">Relying Party</a>'s requirements for <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑦">client-side discoverable credentials</a> (formerly known as <a data-link-type="dfn" href="#resident-credential" id="ref-for-resident-credential①">resident credentials</a> or <a data-link-type="dfn" href="#resident-key" id="ref-for-resident-key②">resident keys</a>):</p>
    <div>
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="ResidentKeyRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;discouraged&quot;|discouraged" id="dom-residentkeyrequirement-discouraged"><code>discouraged</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑦">Relying Party</a> prefers creating a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑥">server-side credential</a>, but will accept a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑧">client-side discoverable credential</a>.
-The <a data-link-type="dfn" href="#client" id="ref-for-client④⑦">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑥">authenticator</a> SHOULD create a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑦">server-side credential</a> if possible.</p>
-      <p class="note" role="note"><span class="marker">Note:</span> A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑧">Relying Party</a> cannot require that a created credential is a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑧">server-side credential</a> and the <a data-link-type="dfn" href="#credprops" id="ref-for-credprops①">Credential Properties Extension</a> may not return a value for the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk">rk</a></code> property. Because of this, it may be the case that it does not know if a credential is a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑨">server-side credential</a> or not and thus does not know whether creating a second credential with the same <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⓪">user handle</a> will evict the first.</p>
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑧">Relying Party</a> prefers creating a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑥">server-side credential</a>, but will accept a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑧">client-side discoverable credential</a>.
+The <a data-link-type="dfn" href="#client" id="ref-for-client④⑧">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑥">authenticator</a> SHOULD create a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑦">server-side credential</a> if possible.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑨">Relying Party</a> cannot require that a created credential is a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑧">server-side credential</a> and the <a data-link-type="dfn" href="#credprops" id="ref-for-credprops①">Credential Properties Extension</a> may not return a value for the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk">rk</a></code> property. Because of this, it may be the case that it does not know if a credential is a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential⑨">server-side credential</a> or not and thus does not know whether creating a second credential with the same <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⓪">user handle</a> will evict the first.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="ResidentKeyRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;preferred&quot;|preferred" id="dom-residentkeyrequirement-preferred"><code>preferred</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①④⑨">Relying Party</a> strongly prefers creating a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑨">client-side discoverable credential</a>, but will accept a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①⓪">server-side credential</a>.
-The <a data-link-type="dfn" href="#client" id="ref-for-client④⑧">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑦">authenticator</a> SHOULD create a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential⑨">discoverable credential</a> if possible.
-For example, the <a data-link-type="dfn" href="#client" id="ref-for-client④⑨">client</a> SHOULD guide the user through setting up <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②②">user verification</a> if needed to create a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⓪">discoverable credential</a>. This takes precedence over the setting of <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-userverification" id="ref-for-dom-authenticatorselectioncriteria-userverification④">userVerification</a></code>.</p>
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⓪">Relying Party</a> strongly prefers creating a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential⑨">client-side discoverable credential</a>, but will accept a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①⓪">server-side credential</a>.
+The <a data-link-type="dfn" href="#client" id="ref-for-client④⑨">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑦">authenticator</a> SHOULD create a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential⑨">discoverable credential</a> if possible.
+For example, the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⓪">client</a> SHOULD guide the user through setting up <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②②">user verification</a> if needed to create a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⓪">discoverable credential</a>. This takes precedence over the setting of <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-userverification" id="ref-for-dom-authenticatorselectioncriteria-userverification④">userVerification</a></code>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="ResidentKeyRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;required&quot;|required" id="dom-residentkeyrequirement-required"><code>required</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⓪">Relying Party</a> requires a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①⓪">client-side discoverable credential</a>.
-The <a data-link-type="dfn" href="#client" id="ref-for-client⑤⓪">client</a> MUST return an error if a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①①">client-side discoverable credential</a> cannot be created.</p>
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤①">Relying Party</a> requires a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①⓪">client-side discoverable credential</a>.
+The <a data-link-type="dfn" href="#client" id="ref-for-client⑤①">client</a> MUST return an error if a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①①">client-side discoverable credential</a> cannot be created.</p>
     </dl>
    </div>
-   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤①">Relying Party</a> can seek information on whether or not the authenticator created a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①②">client-side discoverable credential</a> using the <a data-link-type="dfn" href="#credentialpropertiesoutput-resident-key-credential-property" id="ref-for-credentialpropertiesoutput-resident-key-credential-property">resident key credential property</a> of the <a data-link-type="dfn" href="#credprops" id="ref-for-credprops②">Credential Properties Extension</a>.
+   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤②">Relying Party</a> can seek information on whether or not the authenticator created a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①②">client-side discoverable credential</a> using the <a data-link-type="dfn" href="#credentialpropertiesoutput-resident-key-credential-property" id="ref-for-credentialpropertiesoutput-resident-key-credential-property">resident key credential property</a> of the <a data-link-type="dfn" href="#credprops" id="ref-for-credprops②">Credential Properties Extension</a>.
 This is useful when values of <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-discouraged" id="ref-for-dom-residentkeyrequirement-discouraged④">discouraged</a></code> or <code class="idl"><a data-link-type="idl" href="#dom-residentkeyrequirement-preferred" id="ref-for-dom-residentkeyrequirement-preferred③">preferred</a></code> are used for <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-authenticatorselection" id="ref-for-dom-publickeycredentialcreationoptions-authenticatorselection⑨">authenticatorSelection</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-residentkey" id="ref-for-dom-authenticatorselectioncriteria-residentkey⑤">residentKey</a></code></code>, because in those cases it is possible for an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑧">authenticator</a> to create <em>either</em> a <a data-link-type="dfn" href="#client-side-discoverable-credential" id="ref-for-client-side-discoverable-credential①③">client-side discoverable credential</a> or a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①①">server-side credential</a>.</p>
    <h4 class="heading settled" data-level="5.4.7" id="enum-attestation-convey"><span class="secno">5.4.7. </span><span class="content"><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="attestation-conveyance">Attestation Conveyance</dfn> Preference Enumeration (enum <dfn class="dfn-paneled idl-code" data-dfn-type="enum" data-export id="enumdef-attestationconveyancepreference"><code>AttestationConveyancePreference</code></dfn>)</span><a class="self-link" href="#enum-attestation-convey"></a></h4>
    <p><a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②①">WebAuthn Relying Parties</a> may use <code class="idl"><a data-link-type="idl" href="#enumdef-attestationconveyancepreference" id="ref-for-enumdef-attestationconveyancepreference①">AttestationConveyancePreference</a></code> to specify their preference regarding <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance②">attestation conveyance</a> during credential generation.</p>
@@ -4002,27 +4009,27 @@ <h4 class="heading settled" data-level="5.4.7" id="enum-attestation-convey"><spa
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AttestationConveyancePreference" data-dfn-type="enum-value" data-export data-lt="&quot;none&quot;|none" id="dom-attestationconveyancepreference-none"><code>none</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤②">Relying Party</a> is not interested in <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑨">authenticator</a> <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①①">attestation</a>. For example, in order to
-potentially avoid having to obtain <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent①②">user consent</a> to relay identifying information to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤③">Relying Party</a>, or to save a
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤③">Relying Party</a> is not interested in <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①①⑨">authenticator</a> <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①①">attestation</a>. For example, in order to
+potentially avoid having to obtain <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent①②">user consent</a> to relay identifying information to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤④">Relying Party</a>, or to save a
 roundtrip to an <a data-link-type="dfn" href="#attestation-ca" id="ref-for-attestation-ca">Attestation CA</a> or <a data-link-type="dfn" href="#anonymization-ca" id="ref-for-anonymization-ca①">Anonymization CA</a>.
 If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⓪">authenticator</a> generates an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①①">attestation statement</a> that is not a <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑤">self attestation</a>,
-the <a data-link-type="dfn" href="#client" id="ref-for-client⑤①">client</a> will replace it with a <a data-link-type="dfn" href="#none" id="ref-for-none">None</a> attestation statement.</p>
+the <a data-link-type="dfn" href="#client" id="ref-for-client⑤②">client</a> will replace it with a <a data-link-type="dfn" href="#none" id="ref-for-none">None</a> attestation statement.</p>
       <p>This is the default, and unknown values fall back to the behavior of this value.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AttestationConveyancePreference" data-dfn-type="enum-value" data-export data-lt="&quot;indirect&quot;|indirect" id="dom-attestationconveyancepreference-indirect"><code>indirect</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤④">Relying Party</a> wants to receive a verifiable <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①②">attestation statement</a>,
-but allows the <a data-link-type="dfn" href="#client" id="ref-for-client⑤②">client</a> to decide how to obtain such an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①③">attestation statement</a>.
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑤">Relying Party</a> wants to receive a verifiable <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①②">attestation statement</a>,
+but allows the <a data-link-type="dfn" href="#client" id="ref-for-client⑤③">client</a> to decide how to obtain such an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①③">attestation statement</a>.
 The client MAY replace an authenticator-generated <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①④">attestation statement</a> with one generated by an <a data-link-type="dfn" href="#anonymization-ca" id="ref-for-anonymization-ca②">Anonymization CA</a>,
-in order to protect the user’s privacy, or to assist <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑤">Relying Parties</a> with attestation verification in a heterogeneous ecosystem.</p>
-      <p class="note" role="note"><span class="marker">Note:</span> There is no guarantee that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑥">Relying Party</a> will obtain a verifiable <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑤">attestation statement</a> in this case.
-For example, in the case that the authenticator employs <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑥">self attestation</a> and the <a data-link-type="dfn" href="#client" id="ref-for-client⑤③">client</a> passes the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑥">attestation statement</a> through unmodified.</p>
+in order to protect the user’s privacy, or to assist <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑥">Relying Parties</a> with attestation verification in a heterogeneous ecosystem.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> There is no guarantee that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑦">Relying Party</a> will obtain a verifiable <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑤">attestation statement</a> in this case.
+For example, in the case that the authenticator employs <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑥">self attestation</a> and the <a data-link-type="dfn" href="#client" id="ref-for-client⑤④">client</a> passes the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑥">attestation statement</a> through unmodified.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AttestationConveyancePreference" data-dfn-type="enum-value" data-export data-lt="&quot;direct&quot;|direct" id="dom-attestationconveyancepreference-direct"><code>direct</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑦">Relying Party</a> wants to receive the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑦">attestation statement</a> as generated by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②①">authenticator</a>.</p>
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑧">Relying Party</a> wants to receive the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑦">attestation statement</a> as generated by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②①">authenticator</a>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AttestationConveyancePreference" data-dfn-type="enum-value" data-export data-lt="&quot;enterprise&quot;|enterprise" id="dom-attestationconveyancepreference-enterprise"><code>enterprise</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑧">Relying Party</a> wants to receive an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑧">attestation statement</a> that may include uniquely identifying information. This is intended for controlled deployments within an enterprise where the organization wishes to tie registrations to specific authenticators. User agents MUST NOT provide such an attestation unless the user agent or authenticator configuration permits it for the requested <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②④">RP ID</a>.</p>
-      <p>If permitted, the user agent SHOULD signal to the authenticator (at <a href="#CreateCred-InvokeAuthnrMakeCred">invocation time</a>) that enterprise attestation is requested, and convey the resulting <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid⑤">AAGUID</a> and <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑨">attestation statement</a>, unaltered, to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑨">Relying Party</a>.</p>
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑤⑨">Relying Party</a> wants to receive an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑧">attestation statement</a> that may include uniquely identifying information. This is intended for controlled deployments within an enterprise where the organization wishes to tie registrations to specific authenticators. User agents MUST NOT provide such an attestation unless the user agent or authenticator configuration permits it for the requested <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②④">RP ID</a>.</p>
+      <p>If permitted, the user agent SHOULD signal to the authenticator (at <a href="#CreateCred-InvokeAuthnrMakeCred">invocation time</a>) that enterprise attestation is requested, and convey the resulting <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid⑤">AAGUID</a> and <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement①⑨">attestation statement</a>, unaltered, to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⓪">Relying Party</a>.</p>
     </dl>
    </div>
    <h3 class="heading settled" data-level="5.5" id="dictionary-assertion-options"><span class="secno">5.5. </span><span class="content">Options for Assertion Generation (dictionary <dfn class="dfn-paneled idl-code" data-dfn-type="dictionary" data-export id="dictdef-publickeycredentialrequestoptions"><code>PublicKeyCredentialRequestOptions</code></dfn>)</span><a class="self-link" href="#dictionary-assertion-options"></a></h3>
@@ -4046,37 +4053,37 @@ <h3 class="heading settled" data-level="5.5" id="dictionary-assertion-options"><
      <p>This member specifies a challenge that the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②②">authenticator</a> signs, along with other data, when producing an <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①②">authentication assertion</a>. See the <a href="#sctn-cryptographic-challenges">§ 13.4.3 Cryptographic Challenges</a> security consideration.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-timeout"><code>timeout</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-unsigned-long" id="ref-for-idl-unsigned-long⑤">unsigned long</a></span>
     <dd data-md>
-     <p>This OPTIONAL member specifies a time, in milliseconds, that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⓪">Relying Party</a> is willing to wait for the call to complete.
-The value is treated as a hint, and MAY be overridden by the <a data-link-type="dfn" href="#client" id="ref-for-client⑤④">client</a>.</p>
+     <p>This OPTIONAL member specifies a time, in milliseconds, that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥①">Relying Party</a> is willing to wait for the call to complete.
+The value is treated as a hint, and MAY be overridden by the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑤">client</a>.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-rpid"><code>rpId</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-USVString" id="ref-for-idl-USVString①">USVString</a></span>
     <dd data-md>
-     <p>This OPTIONAL member specifies the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑤">RP ID</a> claimed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥①">Relying Party</a>.
-The <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑤">client</a> MUST verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥②">Relying Party</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①②">origin</a> matches the <a data-link-type="dfn" href="#scope" id="ref-for-scope①②">scope</a> of this <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑥">RP ID</a>.
+     <p>This OPTIONAL member specifies the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑤">RP ID</a> claimed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥②">Relying Party</a>.
+The <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑥">client</a> MUST verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥③">Relying Party</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①②">origin</a> matches the <a data-link-type="dfn" href="#scope" id="ref-for-scope①②">scope</a> of this <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑥">RP ID</a>.
 The <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②③">authenticator</a> MUST verify
 that this <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑦">RP ID</a> exactly equals the <a data-link-type="dfn" href="#public-key-credential-source-rpid" id="ref-for-public-key-credential-source-rpid">rpId</a> of the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①③">credential</a> to be used for the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑦">authentication ceremony</a>.</p>
      <p>If not specified, its value will
 be the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#credentialscontainer" id="ref-for-credentialscontainer②">CredentialsContainer</a></code> object’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#relevant-settings-object" id="ref-for-relevant-settings-object④">relevant settings object</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#concept-settings-object-origin" id="ref-for-concept-settings-object-origin⑦">origin</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin-effective-domain" id="ref-for-concept-origin-effective-domain①③">effective domain</a>.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-allowcredentials"><code>allowCredentials</code></dfn>, <span> of type sequence&lt;<a data-link-type="idl-name" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor⑧">PublicKeyCredentialDescriptor</a>>, defaulting to <code>[]</code></span>
     <dd data-md>
-     <p>This OPTIONAL member is used by the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑥">client</a> to find <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②④">authenticators</a> eligible for this <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑧">authentication ceremony</a>.
+     <p>This OPTIONAL member is used by the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑦">client</a> to find <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②④">authenticators</a> eligible for this <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑧">authentication ceremony</a>.
 It can be used in two ways:</p>
      <ul>
       <li data-md>
-       <p>If the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②③">user account</a> to authenticate is already identified (e.g., if the user has entered a username),
-then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥③">Relying Party</a> SHOULD use this member to list <a data-link-type="dfn" href="#credential-descriptor-for-a-credential-record" id="ref-for-credential-descriptor-for-a-credential-record">credential descriptors for credential records</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②④">user account</a>.
-This SHOULD usually include all <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑤">credential records</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑤">user account</a>.</p>
+       <p>If the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②④">user account</a> to authenticate is already identified (e.g., if the user has entered a username),
+then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥④">Relying Party</a> SHOULD use this member to list <a data-link-type="dfn" href="#credential-descriptor-for-a-credential-record" id="ref-for-credential-descriptor-for-a-credential-record">credential descriptors for credential records</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑤">user account</a>.
+This SHOULD usually include all <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑤">credential records</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑥">user account</a>.</p>
        <p>The <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-item" id="ref-for-list-item⑧">items</a> SHOULD specify <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-transports" id="ref-for-dom-publickeycredentialdescriptor-transports⑨">transports</a></code> whenever possible.
-This helps the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑦">client</a> optimize the user experience for any given situation.
-Also note that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥④">Relying Party</a> does not need to filter the list when requesting <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②③">user verification</a> —
-the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑧">client</a> will automatically ignore non-eligible credentials
+This helps the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑧">client</a> optimize the user experience for any given situation.
+Also note that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑤">Relying Party</a> does not need to filter the list when requesting <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②③">user verification</a> —
+the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑨">client</a> will automatically ignore non-eligible credentials
 if <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-userverification" id="ref-for-dom-publickeycredentialrequestoptions-userverification③">userVerification</a></code> is set to <code class="idl"><a data-link-type="idl" href="#dom-userverificationrequirement-required" id="ref-for-dom-userverificationrequirement-required④">required</a></code>.</p>
        <p>See also the <a href="#sctn-credential-id-privacy-leak">§ 14.6.3 Privacy leak via credential IDs</a> privacy consideration.</p>
       <li data-md>
-       <p>If the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑥">user account</a> to authenticate is not already identified,
-then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑤">Relying Party</a> MAY leave this member <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty④">empty</a> or unspecified.
+       <p>If the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑦">user account</a> to authenticate is not already identified,
+then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑥">Relying Party</a> MAY leave this member <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty④">empty</a> or unspecified.
 In this case, only <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①①">discoverable credentials</a> will be utilized in this <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony①⑨">authentication ceremony</a>,
-and the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑦">user account</a> MAY be identified by the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑤">userHandle</a></code> of the resulting <code class="idl"><a data-link-type="idl" href="#authenticatorassertionresponse" id="ref-for-authenticatorassertionresponse⑥">AuthenticatorAssertionResponse</a></code>.
-If the available <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑤">authenticators</a> <a data-link-type="dfn" href="#contains" id="ref-for-contains②">contain</a> more than one <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①②">discoverable credential</a> <a data-link-type="dfn" href="#scope" id="ref-for-scope①③">scoped</a> to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑥">Relying Party</a>,
+and the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑧">user account</a> MAY be identified by the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑤">userHandle</a></code> of the resulting <code class="idl"><a data-link-type="idl" href="#authenticatorassertionresponse" id="ref-for-authenticatorassertionresponse⑥">AuthenticatorAssertionResponse</a></code>.
+If the available <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑤">authenticators</a> <a data-link-type="dfn" href="#contains" id="ref-for-contains②">contain</a> more than one <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①②">discoverable credential</a> <a data-link-type="dfn" href="#scope" id="ref-for-scope①③">scoped</a> to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑦">Relying Party</a>,
 the credentials are displayed by the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑧">client platform</a> or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑥">authenticator</a> for the user to select from (see <a href="#authenticatorGetAssertion-prompt-select-credential">step 7</a> of <a href="#sctn-op-get-assertion">§ 6.3.3 The authenticatorGetAssertion Operation</a>).</p>
      </ul>
      <p>If not <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty⑤">empty</a>, the client MUST return an error if none of the listed credentials can be used.</p>
@@ -4084,26 +4091,26 @@ <h3 class="heading settled" data-level="5.5" id="dictionary-assertion-options"><
 preferred credential, and the last is the least preferred.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-userverification"><code>userVerification</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑤②">DOMString</a>, defaulting to <code>"preferred"</code></span>
     <dd data-md>
-     <p>This OPTIONAL member specifies the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑦">Relying Party</a>'s requirements regarding <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②④">user verification</a> for the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②③">get()</a></code> operation. The value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement②">UserVerificationRequirement</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑨">client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists④">member does not exist</a>. Eligible authenticators are filtered to only those capable of satisfying this requirement.</p>
+     <p>This OPTIONAL member specifies the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑧">Relying Party</a>'s requirements regarding <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②④">user verification</a> for the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②③">get()</a></code> operation. The value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement②">UserVerificationRequirement</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform③⑨">client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists④">member does not exist</a>. Eligible authenticators are filtered to only those capable of satisfying this requirement.</p>
      <p>See <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement③">UserVerificationRequirement</a></code> for the description of <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-userverification" id="ref-for-dom-authenticatorselectioncriteria-userverification⑤">userVerification</a></code>'s values and semantics.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-hints"><code>hints</code></dfn>, <span> of type sequence&lt;<a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑤③">DOMString</a>>, defaulting to <code>[]</code></span>
     <dd data-md>
      <p>This OPTIONAL member contains zero or more elements from <code class="idl"><a data-link-type="idl" href="#enumdef-publickeycredentialhints" id="ref-for-enumdef-publickeycredentialhints①">PublicKeyCredentialHints</a></code> to guide the user agent in interacting with the user. Note that the elements have type <code>DOMString</code> despite being taken from that enumeration. See <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-attestation"><code>attestation</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑤④">DOMString</a>, defaulting to <code>"none"</code></span>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑧">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance③">attestation conveyance</a>.
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑨">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance③">attestation conveyance</a>.
 Its value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-attestationconveyancepreference" id="ref-for-enumdef-attestationconveyancepreference④">AttestationConveyancePreference</a></code>. <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⓪">Client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists⑤">member does not exist</a>.</p>
      <p>The default value is <code class="idl"><a data-link-type="idl" href="#dom-attestationconveyancepreference-none" id="ref-for-dom-attestationconveyancepreference-none⑤">none</a></code>.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-attestationformats"><code>attestationFormats</code></dfn>, <span> of type sequence&lt;<a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑤⑤">DOMString</a>>, defaulting to <code>[]</code></span>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑥⑨">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding the <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①②">attestation</a> statement format used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑦">authenticator</a>.
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⓪">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding the <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①②">attestation</a> statement format used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑦">authenticator</a>.
 Values SHOULD be taken from the IANA "WebAuthn Attestation Statement Format Identifiers" registry <a data-link-type="biblio" href="#biblio-iana-webauthn-registries" title="Web Authentication (WebAuthn) registries">[IANA-WebAuthn-Registries]</a> established by <a data-link-type="biblio" href="#biblio-rfc8809" title="Registries for Web Authentication (WebAuthn)">[RFC8809]</a>.
 Values are ordered from most preferable to least preferable.
 This parameter is advisory and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑧">authenticator</a> MAY use an attestation statement not enumerated in this parameter.</p>
      <p>The default value is the empty list, which indicates no preference.</p>
     <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialRequestOptions" data-dfn-type="dict-member" data-export id="dom-publickeycredentialrequestoptions-extensions"><code>extensions</code></dfn>, <span> of type <a data-link-type="idl-name" href="#dictdef-authenticationextensionsclientinputs" id="ref-for-dictdef-authenticationextensionsclientinputs③">AuthenticationExtensionsClientInputs</a></span>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⓪">Relying Party</a> MAY use this OPTIONAL member to provide <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input③">client extension inputs</a> requesting additional processing by the <a data-link-type="dfn" href="#client" id="ref-for-client⑤⑨">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑨">authenticator</a>.</p>
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦①">Relying Party</a> MAY use this OPTIONAL member to provide <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input③">client extension inputs</a> requesting additional processing by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⓪">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①②⑨">authenticator</a>.</p>
      <p>The extensions framework is defined in <a href="#sctn-extensions">§ 9 WebAuthn Extensions</a>.
 Some extensions are defined in <a href="#sctn-defined-extensions">§ 10 Defined Extensions</a>;
 consult the IANA "WebAuthn Extension Identifiers" registry <a data-link-type="biblio" href="#biblio-iana-webauthn-registries" title="Web Authentication (WebAuthn) registries">[IANA-WebAuthn-Registries]</a> established by <a data-link-type="biblio" href="#biblio-rfc8809" title="Registries for Web Authentication (WebAuthn)">[RFC8809]</a> for an up-to-date list
@@ -4145,7 +4152,7 @@ <h4 class="heading settled" data-level="5.7.3" id="iface-authentication-extensio
    <p>The <a data-link-type="dfn" href="#cddl" id="ref-for-cddl">CDDL</a> type <code>AuthenticationExtensionsAuthenticatorInputs</code> defines a <a data-link-type="dfn" href="#cbor" id="ref-for-cbor⑤">CBOR</a> map
 containing the <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input">authenticator extension input</a> values for zero or more <a data-link-type="dfn" href="#webauthn-extensions" id="ref-for-webauthn-extensions⑦">WebAuthn Extensions</a>.
 Extensions can add members as described in <a href="#sctn-extension-request-parameters">§ 9.3 Extending Request Parameters</a>.</p>
-   <p>This type is not exposed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦①">Relying Party</a>, but is used by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⓪">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③⓪">authenticator</a>.</p>
+   <p>This type is not exposed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦②">Relying Party</a>, but is used by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥①">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③⓪">authenticator</a>.</p>
    <h4 class="heading settled" data-level="5.7.4" id="iface-authentication-extensions-authenticator-outputs"><span class="secno">5.7.4. </span><span class="content">Authentication Extensions Authenticator Outputs (CDDL type <code>AuthenticationExtensionsAuthenticatorOutputs</code>)</span><a class="self-link" href="#iface-authentication-extensions-authenticator-outputs"></a></h4>
 <pre>AuthenticationExtensionsAuthenticatorOutputs = {
   * $$extensionOutput .within ( tstr => any )
@@ -4158,7 +4165,7 @@ <h3 class="heading settled" data-level="5.8" id="sctn-supporting-data-structures
    <p>The <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③④">public key credential</a> type uses certain data structures that are specified in supporting specifications. These are as
 follows.</p>
    <h4 class="heading settled" data-level="5.8.1" id="dictionary-client-data"><span class="secno">5.8.1. </span><span class="content">Client Data Used in <a data-link-type="dfn" href="#webauthn-signature" id="ref-for-webauthn-signature">WebAuthn Signatures</a> (dictionary <dfn class="dfn-paneled idl-code" data-dfn-type="dictionary" data-export id="dictdef-collectedclientdata"><code>CollectedClientData</code></dfn>)</span><a class="self-link" href="#dictionary-client-data"></a></h4>
-   <p>The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="client-data">client data</dfn> represents the contextual bindings of both the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②②">WebAuthn Relying Party</a> and the <a data-link-type="dfn" href="#client" id="ref-for-client⑥①">client</a>. It is a key-value
+   <p>The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="client-data">client data</dfn> represents the contextual bindings of both the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②②">WebAuthn Relying Party</a> and the <a data-link-type="dfn" href="#client" id="ref-for-client⑥②">client</a>. It is a key-value
 mapping whose keys are strings. Values can be any type that has a valid encoding in JSON. Its structure is defined by the
 following Web IDL.</p>
    <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="#dictdef-collectedclientdata" id="ref-for-dictdef-collectedclientdata②">CollectedClientData</a></code> may be extended in the future. Therefore it’s critical when parsing to be tolerant of unknown keys and of any reordering of the keys. See also <a href="#clientdatajson-verification">§ 5.8.1.2 Limited Verification Algorithm</a>.</p>
@@ -4186,7 +4193,7 @@ <h4 class="heading settled" data-level="5.8.1" id="dictionary-client-data"><span
 attacks (where an attacker substitutes one legitimate signature for another).</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="CollectedClientData" data-dfn-type="dict-member" data-export id="dom-collectedclientdata-challenge"><code>challenge</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑥③">DOMString</a></span>
      <dd data-md>
-      <p>This member contains the base64url encoding of the challenge provided by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦②">Relying Party</a>. See the <a href="#sctn-cryptographic-challenges">§ 13.4.3 Cryptographic Challenges</a> security consideration.</p>
+      <p>This member contains the base64url encoding of the challenge provided by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦③">Relying Party</a>. See the <a href="#sctn-cryptographic-challenges">§ 13.4.3 Cryptographic Challenges</a> security consideration.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="CollectedClientData" data-dfn-type="dict-member" data-export id="dom-collectedclientdata-origin"><code>origin</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑥④">DOMString</a></span>
      <dd data-md>
       <p>This member contains the fully qualified <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①③">origin</a> of the requester, as provided to the authenticator by the client, in
@@ -4203,7 +4210,7 @@ <h4 class="heading settled" data-level="5.8.1" id="dictionary-client-data"><span
      <dt data-md>[RESERVED] <dfn data-dfn-for="CollectedClientData" data-dfn-type="dfn" data-noexport id="collectedclientdata-tokenbinding">tokenBinding<a class="self-link" href="#collectedclientdata-tokenbinding"></a></dfn>
      <dd data-md>
       <p>This OPTIONAL member contains information about the state of the <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc8471#section-1" id="ref-for-section-1">Token Binding</a> protocol <a data-link-type="biblio" href="#biblio-tokenbinding" title="The Token Binding Protocol Version 1.0">[TokenBinding]</a> used when communicating
-with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦③">Relying Party</a>. Its absence indicates that the client doesn’t support token binding</p>
+with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦④">Relying Party</a>. Its absence indicates that the client doesn’t support token binding</p>
       <p class="note" role="note"><span class="marker">Note:</span> While <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc8471#section-1" id="ref-for-section-1①">Token Binding</a> was present in Level 1 and Level 2 of WebAuthn, its use is not expected in Level 3. The <code class="idl"><a data-link-type="idl" href="https://www.w3.org/TR/webauthn-3/#dom-collectedclientdata-tokenbinding" id="ref-for-dom-collectedclientdata-tokenbinding">tokenBinding</a></code> field is reserved so that it will not be reused for a different purpose.</p>
       <div>
        <dl>
@@ -4214,17 +4221,17 @@ <h4 class="heading settled" data-level="5.8.1" id="dictionary-client-data"><span
           <dl>
            <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="TokenBindingStatus" data-dfn-type="enum-value" data-export data-lt="&quot;supported&quot;|supported" id="dom-tokenbindingstatus-supported"><code>supported</code></dfn>
            <dd data-md>
-            <p>Indicates the client supports token binding, but it was not negotiated when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦④">Relying Party</a>.</p>
+            <p>Indicates the client supports token binding, but it was not negotiated when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑤">Relying Party</a>.</p>
            <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="TokenBindingStatus" data-dfn-type="enum-value" data-export data-lt="&quot;present&quot;|present" id="dom-tokenbindingstatus-present"><code>present</code></dfn>
            <dd data-md>
-            <p>Indicates token binding was used when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑤">Relying Party</a>. In this case, the <code class="idl"><a data-link-type="idl" href="#dom-tokenbinding-id" id="ref-for-dom-tokenbinding-id①">id</a></code> member MUST be present.</p>
+            <p>Indicates token binding was used when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑥">Relying Party</a>. In this case, the <code class="idl"><a data-link-type="idl" href="#dom-tokenbinding-id" id="ref-for-dom-tokenbinding-id①">id</a></code> member MUST be present.</p>
           </dl>
          </div>
          <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="#enumdef-tokenbindingstatus" id="ref-for-enumdef-tokenbindingstatus①">TokenBindingStatus</a></code> enumeration is deliberately not referenced, see <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.</p>
         <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="TokenBinding" data-dfn-type="dict-member" data-export id="dom-tokenbinding-id"><code>id</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑥⑦">DOMString</a></span>
         <dd data-md>
          <p>This member MUST be present if <code class="idl"><a data-link-type="idl" href="#dom-tokenbinding-status" id="ref-for-dom-tokenbinding-status①">status</a></code> is <code class="idl"><a data-link-type="idl" href="#dom-tokenbindingstatus-present" id="ref-for-dom-tokenbindingstatus-present①">present</a></code>, and MUST be a <a data-link-type="dfn" href="#base64url-encoding" id="ref-for-base64url-encoding①⓪">base64url
-encoding</a> of the <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc8471#section-3.2" id="ref-for-section-3.2">Token Binding ID</a> that was used when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑥">Relying Party</a>.</p>
+encoding</a> of the <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc8471#section-3.2" id="ref-for-section-3.2">Token Binding ID</a> that was used when communicating with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑦">Relying Party</a>.</p>
        </dl>
       </div>
       <p class="note" role="note"><span class="marker">Note:</span> Obtaining a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc8471#section-3.2" id="ref-for-section-3.2①">Token Binding ID</a> is a <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④②">client platform</a>-specific operation.</p>
@@ -4420,7 +4427,7 @@ <h4 class="heading settled" data-level="5.8.3" id="dictionary-credential-descrip
 </pre>
    <p>This dictionary identifies a specific <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③⑤">public key credential</a>.
 It is used in <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②⓪">create()</a></code> to prevent creating duplicate credentials on the same <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③①">authenticator</a>,
-and in <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②④">get()</a></code> to determine if and how the credential can currently be reached by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥②">client</a>.
+and in <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②④">get()</a></code> to determine if and how the credential can currently be reached by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥③">client</a>.
 It mirrors some fields of the <code class="idl"><a data-link-type="idl" href="#publickeycredential" id="ref-for-publickeycredential②①">PublicKeyCredential</a></code> object returned by <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②①">create()</a></code> and <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②⑤">get()</a></code>.</p>
    <div>
     <dl>
@@ -4434,13 +4441,13 @@ <h4 class="heading settled" data-level="5.8.3" id="dictionary-credential-descrip
       <p>This mirrors the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid①">rawId</a></code> field of <code class="idl"><a data-link-type="idl" href="#publickeycredential" id="ref-for-publickeycredential②③">PublicKeyCredential</a></code>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialDescriptor" data-dfn-type="dict-member" data-export id="dom-publickeycredentialdescriptor-transports"><code>transports</code></dfn>, <span> of type sequence&lt;<a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑦①">DOMString</a>></span>
      <dd data-md>
-      <p>This OPTIONAL member contains a hint as to how the <a data-link-type="dfn" href="#client" id="ref-for-client⑥③">client</a> might communicate with the <a data-link-type="dfn" href="#public-key-credential-source-managing-authenticator" id="ref-for-public-key-credential-source-managing-authenticator①①">managing authenticator</a> of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③⑧">public key credential</a> the caller is referring to. The values SHOULD be members of <code class="idl"><a data-link-type="idl" href="#enumdef-authenticatortransport" id="ref-for-enumdef-authenticatortransport②">AuthenticatorTransport</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④④">client platforms</a> MUST ignore unknown values.</p>
+      <p>This OPTIONAL member contains a hint as to how the <a data-link-type="dfn" href="#client" id="ref-for-client⑥④">client</a> might communicate with the <a data-link-type="dfn" href="#public-key-credential-source-managing-authenticator" id="ref-for-public-key-credential-source-managing-authenticator①①">managing authenticator</a> of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③⑧">public key credential</a> the caller is referring to. The values SHOULD be members of <code class="idl"><a data-link-type="idl" href="#enumdef-authenticatortransport" id="ref-for-enumdef-authenticatortransport②">AuthenticatorTransport</a></code> but <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④④">client platforms</a> MUST ignore unknown values.</p>
       <p>This mirrors the <code><code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-response" id="ref-for-dom-publickeycredential-response④">response</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-gettransports" id="ref-for-dom-authenticatorattestationresponse-gettransports④">getTransports()</a></code></code> method
 of a <code class="idl"><a data-link-type="idl" href="#publickeycredential" id="ref-for-publickeycredential②④">PublicKeyCredential</a></code> structure created by a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②②">create()</a></code> operation.
 When <a href="#sctn-registering-a-new-credential">registering a new credential</a>,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑦">Relying Party</a> SHOULD store the value returned from <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-gettransports" id="ref-for-dom-authenticatorattestationresponse-gettransports⑤">getTransports()</a></code>.
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑧">Relying Party</a> SHOULD store the value returned from <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-gettransports" id="ref-for-dom-authenticatorattestationresponse-gettransports⑤">getTransports()</a></code>.
 When creating a <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor①①">PublicKeyCredentialDescriptor</a></code> for that credential,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑧">Relying Party</a> SHOULD retrieve that stored value
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑨">Relying Party</a> SHOULD retrieve that stored value
 and set it as the value of the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-transports" id="ref-for-dom-publickeycredentialdescriptor-transports①①">transports</a></code> member.</p>
     </dl>
    </div>
@@ -4456,9 +4463,9 @@ <h4 class="heading settled" data-level="5.8.4" id="enum-transport"><span class="
 </pre>
    <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="#enumdef-authenticatortransport" id="ref-for-enumdef-authenticatortransport④">AuthenticatorTransport</a></code> enumeration is deliberately not referenced, see <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.</p>
    <div>
-     <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③②">Authenticators</a> may implement various <a href="#enum-transport">transports</a> for communicating with <a data-link-type="dfn" href="#client" id="ref-for-client⑥④">clients</a>. This enumeration
+     <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③②">Authenticators</a> may implement various <a href="#enum-transport">transports</a> for communicating with <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑤">clients</a>. This enumeration
     defines hints as to how clients might communicate with a particular authenticator in order to obtain an assertion for a
-    specific credential. Note that these hints represent the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②③">WebAuthn Relying Party</a>'s best belief as to how an authenticator may be reached. A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑦⑨">Relying Party</a> will typically learn of the supported transports for a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③⑨">public key credential</a> via <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-gettransports" id="ref-for-dom-authenticatorattestationresponse-gettransports⑥">getTransports()</a></code>. 
+    specific credential. Note that these hints represent the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②③">WebAuthn Relying Party</a>'s best belief as to how an authenticator may be reached. A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⓪">Relying Party</a> will typically learn of the supported transports for a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential③⑨">public key credential</a> via <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-gettransports" id="ref-for-dom-authenticatorattestationresponse-gettransports⑥">getTransports()</a></code>. 
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticatorTransport" data-dfn-type="enum-value" data-export data-lt="&quot;usb&quot;|usb" id="dom-authenticatortransport-usb"><code>usb</code></dfn>
      <dd data-md>
@@ -4517,16 +4524,16 @@ <h4 class="heading settled" data-level="5.8.6" id="enum-userVerificationRequirem
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="UserVerificationRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;required&quot;|required" id="dom-userverificationrequirement-required"><code>required</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⓪">Relying Party</a> requires <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑥">user verification</a> for the operation and will fail the overall <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①①">ceremony</a> if the
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧①">Relying Party</a> requires <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑥">user verification</a> for the operation and will fail the overall <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①①">ceremony</a> if the
 response does not have the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv⑤">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags⑨">flag</a> set.
-The <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑤">client</a> MUST return an error if <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑦">user verification</a> cannot be performed.</p>
+The <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑥">client</a> MUST return an error if <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑦">user verification</a> cannot be performed.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="UserVerificationRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;preferred&quot;|preferred" id="dom-userverificationrequirement-preferred"><code>preferred</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧①">Relying Party</a> prefers <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑧">user verification</a> for the operation if possible, but will not fail the
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧②">Relying Party</a> prefers <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑧">user verification</a> for the operation if possible, but will not fail the
 operation if the response does not have the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv⑥">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags①⓪">flag</a> set.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="UserVerificationRequirement" data-dfn-type="enum-value" data-export data-lt="&quot;discouraged&quot;|discouraged" id="dom-userverificationrequirement-discouraged"><code>discouraged</code></dfn>
      <dd data-md>
-      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧②">Relying Party</a> does not want <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑨">user verification</a> employed during the operation (e.g., in the
+      <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧③">Relying Party</a> does not want <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification②⑨">user verification</a> employed during the operation (e.g., in the
 interest of minimizing disruption to the user interaction flow).</p>
     </dl>
    </div>
@@ -4539,20 +4546,20 @@ <h4 class="heading settled" data-level="5.8.7" id="enum-hints"><span class="secn
 </pre>
    <p class="note" role="note"><span class="marker">Note:</span> The <code class="idl"><a data-link-type="idl" href="#enumdef-publickeycredentialhints" id="ref-for-enumdef-publickeycredentialhints③">PublicKeyCredentialHints</a></code> enumeration is deliberately not referenced, see <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.</p>
    <div>
-     <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑤">WebAuthn Relying Parties</a> may use this enumeration to communicate hints to the user-agent about how a request may be best completed. These hints are not requirements, and do not bind the user-agent, but may guide it in providing the best experience by using contextual information that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧③">Relying Party</a> has about the request. Hints are provided in order of decreasing preference so, if two hints are contradictory, the first one controls. Hints may also overlap: if a more-specific hint is defined a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧④">Relying Party</a> may still wish to send less specific ones for user-agents that may not recognise the more specific one. In this case the most specific hint should be sent before the less-specific ones. 
+     <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑤">WebAuthn Relying Parties</a> may use this enumeration to communicate hints to the user-agent about how a request may be best completed. These hints are not requirements, and do not bind the user-agent, but may guide it in providing the best experience by using contextual information that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧④">Relying Party</a> has about the request. Hints are provided in order of decreasing preference so, if two hints are contradictory, the first one controls. Hints may also overlap: if a more-specific hint is defined a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑤">Relying Party</a> may still wish to send less specific ones for user-agents that may not recognise the more specific one. In this case the most specific hint should be sent before the less-specific ones. 
     <p>Hints MAY contradict information contained in credential <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-transports" id="ref-for-dom-publickeycredentialdescriptor-transports①②">transports</a></code> and <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-authenticatorattachment" id="ref-for-dom-authenticatorselectioncriteria-authenticatorattachment②">authenticatorAttachment</a></code>. When this occurs, the hints take precedence. (Note that <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-transports" id="ref-for-dom-publickeycredentialdescriptor-transports①③">transports</a></code> values are not provided when using <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①③">discoverable credentials</a>, leaving hints as the only avenue for expressing some aspects of such a request.)</p>
     <dl>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialHints" data-dfn-type="enum-value" data-export data-lt="&quot;security-key&quot;|security-key" id="dom-publickeycredentialhints-security-key"><code>security-key</code></dfn>
      <dd data-md>
-      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑤">Relying Party</a> believes that users will satisfy this request with a physical security key. For example, an enterprise <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑥">Relying Party</a> may set this hint if they have issued security keys to their employees and will only accept those <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③⑨">authenticators</a> for <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑦">registration</a> and <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⓪">authentication</a>.</p>
+      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑥">Relying Party</a> believes that users will satisfy this request with a physical security key. For example, an enterprise <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑦">Relying Party</a> may set this hint if they have issued security keys to their employees and will only accept those <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①③⑨">authenticators</a> for <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑦">registration</a> and <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⓪">authentication</a>.</p>
       <p>For compatibility with older user agents, when this hint is used in <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions⑧">PublicKeyCredentialCreationOptions</a></code>, the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-authenticatorattachment" id="ref-for-dom-authenticatorselectioncriteria-authenticatorattachment③">authenticatorAttachment</a></code> SHOULD be set to <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattachment-cross-platform" id="ref-for-dom-authenticatorattachment-cross-platform①">cross-platform</a></code>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialHints" data-dfn-type="enum-value" data-export data-lt="&quot;client-device&quot;|client-device" id="dom-publickeycredentialhints-client-device"><code>client-device</code></dfn>
      <dd data-md>
-      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑦">Relying Party</a> believes that users will satisfy this request with a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators①④">platform authenticator</a> attached to the <a data-link-type="dfn" href="#client-device" id="ref-for-client-device②⓪">client device</a>.</p>
+      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑧">Relying Party</a> believes that users will satisfy this request with a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators①④">platform authenticator</a> attached to the <a data-link-type="dfn" href="#client-device" id="ref-for-client-device②⓪">client device</a>.</p>
       <p>For compatibility with older user agents, when this hint is used in <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions⑨">PublicKeyCredentialCreationOptions</a></code>, the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-authenticatorattachment" id="ref-for-dom-authenticatorselectioncriteria-authenticatorattachment④">authenticatorAttachment</a></code> SHOULD be set to <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattachment-platform" id="ref-for-dom-authenticatorattachment-platform①">platform</a></code>.</p>
      <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="PublicKeyCredentialHints" data-dfn-type="enum-value" data-export data-lt="&quot;hybrid&quot;|hybrid" id="dom-publickeycredentialhints-hybrid"><code>hybrid</code></dfn>
      <dd data-md>
-      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑧">Relying Party</a> believes that users will satisfy this request with general-purpose <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⓪">authenticators</a> such as smartphones. For example, a consumer <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑨">Relying Party</a> may believe that only a small fraction of their customers possesses dedicated security keys. This option also implies that the local <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators①⑤">platform authenticator</a> should not be promoted in the UI.</p>
+      <p>Indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑧⑨">Relying Party</a> believes that users will satisfy this request with general-purpose <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⓪">authenticators</a> such as smartphones. For example, a consumer <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⓪">Relying Party</a> may believe that only a small fraction of their customers possesses dedicated security keys. This option also implies that the local <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators①⑤">platform authenticator</a> should not be promoted in the UI.</p>
       <p>For compatibility with older user agents, when this hint is used in <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①⓪">PublicKeyCredentialCreationOptions</a></code>, the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorselectioncriteria-authenticatorattachment" id="ref-for-dom-authenticatorselectioncriteria-authenticatorattachment⑤">authenticatorAttachment</a></code> SHOULD be set to <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattachment-cross-platform" id="ref-for-dom-authenticatorattachment-cross-platform②">cross-platform</a></code>.</p>
     </dl>
    </div>
@@ -4566,22 +4573,22 @@ <h3 class="heading settled" data-level="5.9" id="sctn-permissions-policy"><span
    <h3 class="heading settled" data-level="5.10" id="sctn-iframe-guidance"><span class="secno">5.10. </span><span class="content">Using Web Authentication within <code>iframe</code> elements</span><a class="self-link" href="#sctn-iframe-guidance"></a></h3>
    <p>The <a data-link-type="dfn" href="#web-authentication-api" id="ref-for-web-authentication-api①④">Web Authentication API</a> is disabled by default in cross-origin <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①">iframe</a></code>s.
 To override this default policy and indicate that a cross-origin <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element②">iframe</a></code> is allowed to invoke the <a data-link-type="dfn" href="#web-authentication-api" id="ref-for-web-authentication-api①⑤">Web Authentication API</a>'s <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-discoverfromexternalsource-slot" id="ref-for-dom-publickeycredential-discoverfromexternalsource-slot①②">[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</a></code> method, specify the <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow">allow</a></code> attribute on the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element③">iframe</a></code> element and include the <code><a data-link-type="dfn" href="#publickey-credentials-get-feature" id="ref-for-publickey-credentials-get-feature">publickey-credentials-get</a></code> feature-identifier token in the <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow①">allow</a></code> attribute’s value.</p>
-   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⓪">Relying Parties</a> utilizing the WebAuthn API in an embedded context should review <a href="#sctn-seccons-visibility">§ 13.4.2 Visibility Considerations for Embedded Usage</a> regarding <a data-link-type="dfn" href="#ui-redressing" id="ref-for-ui-redressing">UI redressing</a> and its possible mitigations.</p>
+   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨①">Relying Parties</a> utilizing the WebAuthn API in an embedded context should review <a href="#sctn-seccons-visibility">§ 13.4.2 Visibility Considerations for Embedded Usage</a> regarding <a data-link-type="dfn" href="#ui-redressing" id="ref-for-ui-redressing">UI redressing</a> and its possible mitigations.</p>
    <h2 class="heading settled" data-level="6" id="sctn-authenticator-model"><span class="secno">6. </span><span class="content">WebAuthn <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-model">Authenticator Model</dfn></span><a class="self-link" href="#sctn-authenticator-model"></a></h2>
    <p><a href="#sctn-api">The Web Authentication API</a> implies a specific abstract functional model for a <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator⑤">WebAuthn Authenticator</a>. This section
 describes that <a data-link-type="dfn" href="#authenticator-model" id="ref-for-authenticator-model②">authenticator model</a>.</p>
    <p><a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑤">Client platforms</a> MAY implement and expose this abstract model in any way desired. However, the behavior of the client’s Web
 Authentication API implementation, when operating on the authenticators supported by that <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑥">client platform</a>, MUST be indistinguishable
 from the behavior specified in <a href="#sctn-api">§ 5 Web Authentication API</a>.</p>
-   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> is an example of a concrete instantiation of this model, but it is one in which there are differences in the data it returns and those expected by the <a href="#sctn-api">WebAuthn API</a>'s algorithms. The CTAP2 response messages are CBOR maps constructed using integer keys rather than the string keys defined in this specification for the same objects. The <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑥">client</a> is expected to perform any needed transformations on such data. The <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> specification details the mapping between CTAP2 integer keys and WebAuthn string keys, in section <a data-link-type="dfn" href="https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#responses" id="ref-for-responses">§6.2. Responses</a>.</p>
+   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> is an example of a concrete instantiation of this model, but it is one in which there are differences in the data it returns and those expected by the <a href="#sctn-api">WebAuthn API</a>'s algorithms. The CTAP2 response messages are CBOR maps constructed using integer keys rather than the string keys defined in this specification for the same objects. The <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑦">client</a> is expected to perform any needed transformations on such data. The <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> specification details the mapping between CTAP2 integer keys and WebAuthn string keys, in section <a data-link-type="dfn" href="https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#responses" id="ref-for-responses">§6.2. Responses</a>.</p>
    <p>For authenticators, this model defines the logical operations that they MUST support, and the data formats that they expose to
 the client and the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑥">WebAuthn Relying Party</a>. However, it does not define the details of how authenticators communicate with the <a data-link-type="dfn" href="#client-device" id="ref-for-client-device②①">client device</a>,
-unless they are necessary for interoperability with <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨①">Relying Parties</a>. For instance, this abstract model does not define protocols for
+unless they are necessary for interoperability with <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨②">Relying Parties</a>. For instance, this abstract model does not define protocols for
 connecting authenticators to clients over transports such as USB or NFC. Similarly, this abstract model does not define specific
 error codes or methods of returning them; however, it does define error behavior in terms of the needs of the client. Therefore,
 specific error codes are mentioned as a means of showing which error conditions MUST be distinguishable (or not) from each other
 in order to enable a compliant and secure client implementation.</p>
-   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨②">Relying Parties</a> may influence authenticator selection, if they deem necessary, by stipulating various authenticator characteristics
+   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨③">Relying Parties</a> may influence authenticator selection, if they deem necessary, by stipulating various authenticator characteristics
 when <a href="#sctn-createCredential">creating credentials</a> and/or when <a href="#sctn-getAssertion">generating assertions</a>, through use of <a href="#dictionary-makecredentialoptions">credential creation options</a> or <a href="#dictionary-assertion-options">assertion generation options</a>,
 respectively. The algorithms underlying the <a href="#sctn-api">WebAuthn API</a> marshal these options and pass them to the applicable <a href="#sctn-authenticator-ops">authenticator operations</a> defined below.</p>
    <p>In this abstract model, the authenticator provides key management and cryptographic signatures. It can be embedded in the
@@ -4593,12 +4600,12 @@ <h2 class="heading settled" data-level="6" id="sctn-authenticator-model"><span c
    <p>Additionally, each authenticator has an AAGUID, which is a 128-bit identifier indicating the type (e.g. make and model) of the
 authenticator. The AAGUID MUST be chosen by the manufacturer to be identical across all substantially identical authenticators
 made by that manufacturer, and different (with high probability) from the AAGUIDs of all other types of authenticators.
-The AAGUID for a given type of authenticator SHOULD be randomly generated to ensure this. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨③">Relying Party</a> MAY use the AAGUID to infer certain
+The AAGUID for a given type of authenticator SHOULD be randomly generated to ensure this. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨④">Relying Party</a> MAY use the AAGUID to infer certain
 properties of the authenticator, such as certification level and strength of key protection, using information from other sources.</p>
    <p>The primary function of the authenticator is to provide <a data-link-type="dfn" href="#webauthn-signature" id="ref-for-webauthn-signature①">WebAuthn signatures</a>, which are bound to various contextual data. These
 data are observed and added at different levels of the stack as a signature request passes from the server to the
 authenticator. In verifying a signature, the server checks these bindings against expected values. These contextual bindings
-are divided in two: Those added by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨④">Relying Party</a> or the client, referred to as <a data-link-type="dfn" href="#client-data" id="ref-for-client-data②">client data</a>; and those added by the authenticator,
+are divided in two: Those added by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑤">Relying Party</a> or the client, referred to as <a data-link-type="dfn" href="#client-data" id="ref-for-client-data②">client data</a>; and those added by the authenticator,
 referred to as the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data①⑦">authenticator data</a>. The authenticator signs over the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data③">client data</a>, but is otherwise not interested in
 its contents. To save bandwidth and processing requirements on the authenticator, the client hashes the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data④">client data</a> and
 sends only the result to the authenticator. The authenticator signs over the combination of the <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data⑥">hash of the serialized client data</a>, and its own <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data①⑧">authenticator data</a>.</p>
@@ -4611,7 +4618,7 @@ <h2 class="heading settled" data-level="6" id="sctn-authenticator-model"><span c
      <p>The data processed by the authenticator should be small and easy to interpret in low-level code. In particular, authenticators
 should not have to parse high-level encodings such as JSON.</p>
     <li data-md>
-     <p>Both the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑦">client</a> and the authenticator should have the flexibility to add contextual bindings as needed.</p>
+     <p>Both the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑧">client</a> and the authenticator should have the flexibility to add contextual bindings as needed.</p>
     <li data-md>
      <p>The design aims to reuse as much as possible of existing encoding formats in order to aid adoption and implementation.</p>
    </ul>
@@ -4637,7 +4644,7 @@ <h3 class="heading settled" data-level="6.1" id="sctn-authenticator-data"><span
 controlled by the authenticator itself, and derive their trust from the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑦">WebAuthn Relying Party</a>'s assessment of the security properties of the
 authenticator. In one extreme case, the authenticator may be embedded in the client, and its bindings may be no more trustworthy
 than the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data⑥">client data</a>. At the other extreme, the authenticator may be a discrete entity with high-security hardware and
-software, connected to the client over a secure channel. In both cases, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑤">Relying Party</a> receives the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data①⑨">authenticator data</a> in the same
+software, connected to the client over a secure channel. In both cases, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑥">Relying Party</a> receives the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data①⑨">authenticator data</a> in the same
 format, and uses its knowledge of the authenticator to make trust decisions.</p>
    <p>The <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data②⓪">authenticator data</a> has a compact but extensible encoding. This is desired since authenticators can be devices with
 limited capabilities and low power requirements, with much simpler software stacks than the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑦">client platform</a>.</p>
@@ -4728,11 +4735,11 @@ <h3 class="heading settled" data-level="6.1" id="sctn-authenticator-data"><span
     <figcaption> <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data②④">Authenticator data</a> layout. The names in the Name column are only for reference within this document, and are not
         present in the actual representation of the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data②⑤">authenticator data</a>. </figcaption>
    </figure>
-   <p>The <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑨">RP ID</a> is originally received from the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑧">client</a> when the credential is created, and again when an <a data-link-type="dfn" href="#assertion" id="ref-for-assertion③">assertion</a> is generated.
+   <p>The <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id②⑨">RP ID</a> is originally received from the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑨">client</a> when the credential is created, and again when an <a data-link-type="dfn" href="#assertion" id="ref-for-assertion③">assertion</a> is generated.
 However, it differs from other <a data-link-type="dfn" href="#client-data" id="ref-for-client-data⑦">client data</a> in some important ways. First, unlike the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data⑧">client data</a>, the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⓪">RP ID</a> of a
 credential does not change between operations but instead remains the same for the lifetime of that credential. Secondly, it is
 validated by the authenticator during the <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion⑧">authenticatorGetAssertion</a> operation, by verifying that the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③①">RP ID</a> that
-the requested <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential④③">credential</a> is <a data-link-type="dfn" href="#scope" id="ref-for-scope①⑤">scoped</a> to exactly matches the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③②">RP ID</a> supplied by the <a data-link-type="dfn" href="#client" id="ref-for-client⑥⑨">client</a>.</p>
+the requested <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential④③">credential</a> is <a data-link-type="dfn" href="#scope" id="ref-for-scope①⑤">scoped</a> to exactly matches the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③②">RP ID</a> supplied by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⓪">client</a>.</p>
    <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⑦">Authenticators</a> <dfn class="dfn-paneled" data-dfn-for="authenticator data" data-dfn-type="dfn" data-noexport id="authenticator-data-perform-the-following-steps-to-generate-an-authenticator-data-structure">perform the following steps to generate an <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data②⑥">authenticator data</a> structure</dfn>:</p>
    <ul>
     <li data-md>
@@ -4763,15 +4770,15 @@ <h3 class="heading settled" data-level="6.1" id="sctn-authenticator-data"><span
    </div>
    <h4 class="heading settled" data-level="6.1.1" id="sctn-sign-counter"><span class="secno">6.1.1. </span><span class="content"><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="signature-counter">Signature Counter</dfn> Considerations</span><a class="self-link" href="#sctn-sign-counter"></a></h4>
    <p>Authenticators SHOULD implement a <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter②">signature counter</a> feature. These counters are conceptually stored for each credential
-by the authenticator, or globally for the authenticator as a whole. The initial value of a credential’s <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter③">signature counter</a> is specified in the <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount①">signCount</a></code> value of the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③⓪">authenticator data</a> returned by <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential①①">authenticatorMakeCredential</a>. The <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter④">signature counter</a> is incremented for each successful <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion⑨">authenticatorGetAssertion</a> operation by some positive value, and subsequent values are returned to the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑧">WebAuthn Relying Party</a> within the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③①">authenticator data</a> again. The <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑤">signature counter</a>'s purpose is to aid <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑥">Relying Parties</a> in detecting cloned authenticators. Clone
+by the authenticator, or globally for the authenticator as a whole. The initial value of a credential’s <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter③">signature counter</a> is specified in the <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount①">signCount</a></code> value of the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③⓪">authenticator data</a> returned by <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential①①">authenticatorMakeCredential</a>. The <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter④">signature counter</a> is incremented for each successful <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion⑨">authenticatorGetAssertion</a> operation by some positive value, and subsequent values are returned to the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑧">WebAuthn Relying Party</a> within the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③①">authenticator data</a> again. The <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑤">signature counter</a>'s purpose is to aid <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑦">Relying Parties</a> in detecting cloned authenticators. Clone
 detection is more important for authenticators with limited protection measures.</p>
    <p>Authenticators that do not implement a <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑥">signature counter</a> leave the <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount②">signCount</a></code> in the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③②">authenticator data</a> constant at zero.</p>
-   <p>A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑦">Relying Party</a> stores the <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑦">signature counter</a> of the most recent <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①⓪">authenticatorGetAssertion</a> operation. (Or the counter from the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential①②">authenticatorMakeCredential</a> operation if no <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①①">authenticatorGetAssertion</a> has ever been performed on a credential.) In subsequent <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①②">authenticatorGetAssertion</a> operations, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑧">Relying Party</a> compares the stored <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑧">signature counter</a> value with the new <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount③">signCount</a></code> value returned in the assertion’s <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③③">authenticator data</a>. If either is non-zero, and the new <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount④">signCount</a></code> value is less than or equal to the stored value, a cloned authenticator may exist, or the authenticator may be malfunctioning.</p>
-   <p>Detecting a <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑨">signature counter</a> mismatch does not indicate whether the current operation was performed by a cloned authenticator or the original authenticator. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑨">Relying Parties</a> should address this situation appropriately relative to their individual situations, i.e., their risk tolerance.</p>
+   <p>A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑧">Relying Party</a> stores the <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑦">signature counter</a> of the most recent <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①⓪">authenticatorGetAssertion</a> operation. (Or the counter from the <a data-link-type="dfn" href="#authenticatormakecredential" id="ref-for-authenticatormakecredential①②">authenticatorMakeCredential</a> operation if no <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①①">authenticatorGetAssertion</a> has ever been performed on a credential.) In subsequent <a data-link-type="dfn" href="#authenticatorgetassertion" id="ref-for-authenticatorgetassertion①②">authenticatorGetAssertion</a> operations, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party①⑨⑨">Relying Party</a> compares the stored <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑧">signature counter</a> value with the new <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount③">signCount</a></code> value returned in the assertion’s <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data③③">authenticator data</a>. If either is non-zero, and the new <code><a data-link-type="dfn" href="#authdata-signcount" id="ref-for-authdata-signcount④">signCount</a></code> value is less than or equal to the stored value, a cloned authenticator may exist, or the authenticator may be malfunctioning.</p>
+   <p>Detecting a <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter⑨">signature counter</a> mismatch does not indicate whether the current operation was performed by a cloned authenticator or the original authenticator. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⓪">Relying Parties</a> should address this situation appropriately relative to their individual situations, i.e., their risk tolerance.</p>
    <p>Authenticators:</p>
    <ul>
     <li data-md>
-     <p>SHOULD implement per credential <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter①⓪">signature counters</a>.  This prevents the <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter①①">signature counter</a> value from being shared between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⓪">Relying Parties</a> and being possibly employed
+     <p>SHOULD implement per credential <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter①⓪">signature counters</a>.  This prevents the <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter①①">signature counter</a> value from being shared between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪①">Relying Parties</a> and being possibly employed
 as a correlation handle for the user. Authenticators MAY implement a global <a data-link-type="dfn" href="#signature-counter" id="ref-for-signature-counter①②">signature counter</a>,
 i.e., on a per-authenticator basis, but this is less privacy-friendly for users.</p>
     <li data-md>
@@ -4815,25 +4822,25 @@ <h4 class="heading settled" data-level="6.1.3" id="sctn-credential-backup"><span
     </table>
     <figcaption> <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be④">BE</a> and <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs④">BS</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑥">flag</a> combinations </figcaption>
    </figure>
-   <p>It is RECOMMENDED that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪①">Relying Parties</a> store the most recent value of these <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑦">flags</a> with the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑧">user account</a> for future evaluation.</p>
-   <p>The following is a non-exhaustive list of how <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪②">Relying Parties</a> might use these <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑧">flags</a>:</p>
+   <p>It is RECOMMENDED that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪②">Relying Parties</a> store the most recent value of these <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑦">flags</a> with the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑨">user account</a> for future evaluation.</p>
+   <p>The following is a non-exhaustive list of how <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪③">Relying Parties</a> might use these <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑧">flags</a>:</p>
    <ul>
     <li data-md>
      <p>Requiring additional <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⑧">authenticators</a>:</p>
      <p>When the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be⑤">BE</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags②⑨">flag</a> is set to <code>0</code>, the credential is a <a data-link-type="dfn" href="#single-device-credential" id="ref-for-single-device-credential②">single-device credential</a> and the <a data-link-type="dfn" href="#generating-authenticator" id="ref-for-generating-authenticator③">generating authenticator</a> will never
 allow the credential to be backed up.</p>
-     <p>A <a data-link-type="dfn" href="#single-device-credential" id="ref-for-single-device-credential③">single-device credential</a> is not resilient to single device loss. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪③">Relying Parties</a> SHOULD ensure that each <a data-link-type="dfn" href="#user-account" id="ref-for-user-account②⑨">user account</a> has additional <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⑨">authenticators</a> <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑧">registered</a> and/or an account recovery process in place.
+     <p>A <a data-link-type="dfn" href="#single-device-credential" id="ref-for-single-device-credential③">single-device credential</a> is not resilient to single device loss. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪④">Relying Parties</a> SHOULD ensure that each <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⓪">user account</a> has additional <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①④⑨">authenticators</a> <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑧">registered</a> and/or an account recovery process in place.
 For example, the user could be prompted to set up an additional <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤⓪">authenticator</a>, such as a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators⑦">roaming authenticator</a> or an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤①">authenticator</a> that is capable of <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential④">multi-device credentials</a>.</p>
     <li data-md>
      <p>Upgrading a user to a password-free account:</p>
      <p>When the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs⑤">BS</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⓪">flag</a> changes from <code>0</code> to <code>1</code>, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤②">authenticator</a> is signaling that the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①④">credential</a> is backed up and is protected from single device loss.</p>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪④">Relying Party</a> MAY choose to prompt the user to upgrade their account security and remove their password.</p>
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑤">Relying Party</a> MAY choose to prompt the user to upgrade their account security and remove their password.</p>
     <li data-md>
      <p>Adding an additional factor after a state change:</p>
      <p>When the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs⑥">BS</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③①">flag</a> changes from <code>1</code> to <code>0</code>, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤③">authenticator</a> is signaling that the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑤">credential</a> is no longer backed up,
 and no longer protected from single device loss. This could be the result of the user actions, such as disabling the backup service,
 or errors, such as issues with the backup service.</p>
-     <p>When this transition occurs, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑤">Relying Party</a> SHOULD guide the user through a process to validate their other authentication factors.
+     <p>When this transition occurs, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑥">Relying Party</a> SHOULD guide the user through a process to validate their other authentication factors.
 If the user does not have another credential for their account, they SHOULD be guided through adding an additional credential
 to ensure they do not lose access to their account. For example, the user could be prompted to set up an additional <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤④">authenticator</a>,
 such as a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators⑧">roaming authenticator</a> or an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤⑤">authenticator</a> that is capable of <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑤">multi-device credentials</a>.</p>
@@ -4863,7 +4870,7 @@ <h3 class="heading settled" data-level="6.2" id="sctn-authenticator-taxonomy"><s
     <li data-md>
      <p>Whether the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑤⑨">authenticator</a> is a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①①">roaming</a> or <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators①⑦">platform</a> authenticator,
 or in some cases both — the <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality①①">authenticator attachment modality</a>.
-A <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①②">roaming authenticator</a> can support one or more <a href="#enum-transport">transports</a> for communicating with the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⓪">client</a>.</p>
+A <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①②">roaming authenticator</a> can support one or more <a href="#enum-transport">transports</a> for communicating with the <a data-link-type="dfn" href="#client" id="ref-for-client⑦①">client</a>.</p>
     <li data-md>
      <p>Whether the authenticator is capable of <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③③">user verification</a> — the <a data-link-type="dfn" href="#authentication-factor-capability" id="ref-for-authentication-factor-capability">authentication factor capability</a>.</p>
     <li data-md>
@@ -4918,7 +4925,7 @@ <h3 class="heading settled" data-level="6.2" id="sctn-authenticator-taxonomy"><s
 these authenticators support <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③④">user verification</a> as a second <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af⑦">authentication factor</a>,
 typically a PIN or <a data-link-type="dfn" href="#biometric-recognition" id="ref-for-biometric-recognition③">biometric recognition</a>.
 The <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥⓪">authenticator</a> can thus act as two kinds of <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af⑧">authentication factor</a>,
-which enables <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af⑨">multi-factor</a> authentication while eliminating the need to share a password with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑥">Relying Party</a>.</p>
+which enables <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af⑨">multi-factor</a> authentication while eliminating the need to share a password with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑦">Relying Party</a>.</p>
    <p>The combinations not named in <a href="#table-authenticatorTypes">Table <span class="table-ref-previous"></span></a> have less distinguished use cases:</p>
    <ul>
     <li data-md>
@@ -4931,7 +4938,7 @@ <h3 class="heading settled" data-level="6.2" id="sctn-authenticator-taxonomy"><s
    </ul>
    <p>The following subsections define the aspects <a data-link-type="dfn" href="#authenticator-attachment-modality" id="ref-for-authenticator-attachment-modality①③">authenticator attachment modality</a>, <a data-link-type="dfn" href="#credential-storage-modality" id="ref-for-credential-storage-modality②">credential storage modality</a> and <a data-link-type="dfn" href="#authentication-factor-capability" id="ref-for-authentication-factor-capability②">authentication factor capability</a> in more depth.</p>
    <h4 class="heading settled" data-level="6.2.1" id="sctn-authenticator-attachment-modality"><span class="secno">6.2.1. </span><span class="content"><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-attachment-modality">Authenticator Attachment Modality</dfn></span><a class="self-link" href="#sctn-authenticator-attachment-modality"></a></h4>
-   <p><a data-link-type="dfn" href="#client" id="ref-for-client⑦①">Clients</a> can communicate with <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥②">authenticators</a> using a variety of mechanisms. For example, a <a data-link-type="dfn" href="#client" id="ref-for-client⑦②">client</a> MAY use a <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⓪">client device</a>-specific API to communicate with an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥③">authenticator</a> which is physically bound to a <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③①">client device</a>. On the other hand, a <a data-link-type="dfn" href="#client" id="ref-for-client⑦③">client</a> can use a variety of standardized cross-platform transport protocols such as Bluetooth (see <a href="#enum-transport">§ 5.8.4 Authenticator Transport Enumeration (enum AuthenticatorTransport)</a>) to discover
+   <p><a data-link-type="dfn" href="#client" id="ref-for-client⑦②">Clients</a> can communicate with <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥②">authenticators</a> using a variety of mechanisms. For example, a <a data-link-type="dfn" href="#client" id="ref-for-client⑦③">client</a> MAY use a <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⓪">client device</a>-specific API to communicate with an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥③">authenticator</a> which is physically bound to a <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③①">client device</a>. On the other hand, a <a data-link-type="dfn" href="#client" id="ref-for-client⑦④">client</a> can use a variety of standardized cross-platform transport protocols such as Bluetooth (see <a href="#enum-transport">§ 5.8.4 Authenticator Transport Enumeration (enum AuthenticatorTransport)</a>) to discover
 and communicate with <a data-link-type="dfn" href="#cross-platform-attachment" id="ref-for-cross-platform-attachment⑤">cross-platform attached</a> <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥④">authenticators</a>. We refer to <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥⑤">authenticators</a> that
 are part of the <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③②">client device</a> as <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="platform-authenticators">platform authenticators</dfn>, while those that are reachable via cross-platform
 transport protocols are referred to as <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="roaming-authenticators">roaming authenticators</dfn>.</p>
@@ -4946,8 +4953,8 @@ <h4 class="heading settled" data-level="6.2.1" id="sctn-authenticator-attachment
    </ul>
    <p>Some <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators②⓪">platform authenticators</a> could possibly also act as <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①⑦">roaming authenticators</a> depending on context. For example, a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators②①">platform authenticator</a> integrated into a mobile device could make itself available as a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①⑧">roaming authenticator</a> via
 Bluetooth.
-In this case <a data-link-type="dfn" href="#client" id="ref-for-client⑦④">clients</a> running on the mobile device would recognise the authenticator as a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators②②">platform authenticator</a>,
-while <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑤">clients</a> running on a different <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⑥">client device</a> and communicating with the same authenticator via Bluetooth
+In this case <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑤">clients</a> running on the mobile device would recognise the authenticator as a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators②②">platform authenticator</a>,
+while <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑥">clients</a> running on a different <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⑥">client device</a> and communicating with the same authenticator via Bluetooth
 would recognize it as a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators①⑨">roaming authenticator</a>.</p>
    <p>The primary use case for <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators②③">platform authenticators</a> is to register a particular <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⑦">client device</a> as a "trusted device",
 so the <a data-link-type="dfn" href="#client-device" id="ref-for-client-device③⑧">client device</a> itself acts as a <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af①②">something you have</a> <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af①③">authentication factor</a> for future <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①①">authentication</a>.
@@ -4964,12 +4971,12 @@ <h4 class="heading settled" data-level="6.2.2" id="sctn-credential-storage-modal
    <p>An <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥⑧">authenticator</a> can store a <a data-link-type="dfn" href="#public-key-credential-source" id="ref-for-public-key-credential-source⑤①">public key credential source</a> in one of two ways:</p>
    <ol>
     <li data-md>
-     <p>In persistent storage embedded in the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥⑨">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑥">client</a> or <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④④">client device</a>, e.g., in a secure element.
+     <p>In persistent storage embedded in the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑥⑨">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑦">client</a> or <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④④">client device</a>, e.g., in a secure element.
 This is a technical requirement for a <a data-link-type="dfn" href="#client-side-discoverable-public-key-credential-source" id="ref-for-client-side-discoverable-public-key-credential-source③">client-side discoverable public key credential source</a>.</p>
     <li data-md>
      <p>By encrypting (i.e., wrapping) the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①②">credential private key</a> such that only this <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦⓪">authenticator</a> can decrypt (i.e., unwrap) it and letting the resulting
-ciphertext be the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id②④">credential ID</a> for the <a data-link-type="dfn" href="#public-key-credential-source" id="ref-for-public-key-credential-source⑤②">public key credential source</a>. The <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id②⑤">credential ID</a> is stored by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑦">Relying Party</a> and returned to the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦①">authenticator</a> via the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials①⑥">allowCredentials</a></code> option of <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②⑦">get()</a></code>, which allows the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦②">authenticator</a> to decrypt and use the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①③">credential private key</a>.</p>
-     <p>This enables the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦③">authenticator</a> to have unlimited storage capacity for <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①④">credential private keys</a>, since the encrypted <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①⑤">credential private keys</a> are stored by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑧">Relying Party</a> instead of by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦④">authenticator</a> - but it means that a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑥">credential</a> stored in this way must be retrieved from the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑨">Relying Party</a> before the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦⑤">authenticator</a> can use it.</p>
+ciphertext be the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id②④">credential ID</a> for the <a data-link-type="dfn" href="#public-key-credential-source" id="ref-for-public-key-credential-source⑤②">public key credential source</a>. The <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id②⑤">credential ID</a> is stored by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑧">Relying Party</a> and returned to the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦①">authenticator</a> via the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials①⑥">allowCredentials</a></code> option of <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get②⑦">get()</a></code>, which allows the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦②">authenticator</a> to decrypt and use the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①③">credential private key</a>.</p>
+     <p>This enables the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦③">authenticator</a> to have unlimited storage capacity for <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①④">credential private keys</a>, since the encrypted <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①⑤">credential private keys</a> are stored by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⓪⑨">Relying Party</a> instead of by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦④">authenticator</a> - but it means that a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑥">credential</a> stored in this way must be retrieved from the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⓪">Relying Party</a> before the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦⑤">authenticator</a> can use it.</p>
    </ol>
    <p>Which of these storage strategies an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦⑥">authenticator</a> supports defines the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑦⑦">authenticator</a>'s <dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="credential storage modality" data-noexport id="credential-storage-modality">credential storage
 modality</dfn> as follows:</p>
@@ -4992,8 +4999,8 @@ <h4 class="heading settled" data-level="6.2.3" id="sctn-authentication-factor-ca
 verification</a> can also act as one or two additional kinds of <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af①⑨">authentication factor</a>. For example, if the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧④">authenticator</a> can
 verify a PIN, the PIN is <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⓪">something you know</a>, and a <a data-link-type="dfn" href="#biometric-authenticator" id="ref-for-biometric-authenticator">biometric authenticator</a> can verify <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②①">something you are</a>. Therefore, an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑤">authenticator</a> that supports <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑥">user verification</a> is <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="multi-factor-capable">multi-factor capable</dfn>. Conversely, an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑥">authenticator</a> that is
 not <a data-link-type="dfn" href="#multi-factor-capable" id="ref-for-multi-factor-capable⑤">multi-factor capable</a> is <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="single-factor-capable">single-factor capable</dfn>. Note that a single <a data-link-type="dfn" href="#multi-factor-capable" id="ref-for-multi-factor-capable⑥">multi-factor capable</a> <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑦">authenticator</a> could support several modes of <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑦">user verification</a>, meaning it could act as all three kinds of <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②②">authentication factor</a>.</p>
-   <p>Although <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑧">user verification</a> is performed locally on the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑧">authenticator</a> and not by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⓪">Relying Party</a>, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑨">authenticator</a> indicates if <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑨">user verification</a> was performed by setting the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv⑨">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③②">flag</a> in the signed response returned to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①①">Relying Party</a>.
-The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①②">Relying Party</a> can therefore use the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①⓪">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③③">flag</a> to verify that additional <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②③">authentication factors</a> were used in a <a data-link-type="dfn" href="#registration" id="ref-for-registration①⑧">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②③">authentication ceremony</a>. The authenticity of the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①①">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③④">flag</a> can in turn be assessed by inspecting the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⓪">authenticator</a>'s <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⓪">attestation statement</a>.</p>
+   <p>Although <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑧">user verification</a> is performed locally on the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑧">authenticator</a> and not by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①①">Relying Party</a>, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑧⑨">authenticator</a> indicates if <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification③⑨">user verification</a> was performed by setting the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv⑨">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③②">flag</a> in the signed response returned to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①②">Relying Party</a>.
+The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①③">Relying Party</a> can therefore use the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①⓪">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③③">flag</a> to verify that additional <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②③">authentication factors</a> were used in a <a data-link-type="dfn" href="#registration" id="ref-for-registration①⑧">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②③">authentication ceremony</a>. The authenticity of the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①①">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③④">flag</a> can in turn be assessed by inspecting the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⓪">authenticator</a>'s <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⓪">attestation statement</a>.</p>
    <h3 class="heading settled" data-level="6.3" id="sctn-authenticator-ops"><span class="secno">6.3. </span><span class="content"><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-operations">Authenticator Operations</dfn></span><a class="self-link" href="#sctn-authenticator-ops"></a></h3>
    <p>A <a data-link-type="dfn" href="#webauthn-client" id="ref-for-webauthn-client⑥">WebAuthn Client</a> MUST connect to an authenticator in order to invoke any of the operations of that authenticator. This connection
 defines an <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-session">authenticator session</dfn>. An authenticator must maintain isolation between sessions. It may do this by only allowing one
@@ -5027,13 +5034,13 @@ <h4 class="heading settled" data-level="6.3.2" id="sctn-op-make-cred"><span clas
      <p>The <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data⑨">hash of the serialized client data</a>, provided by the client.</p>
     <dt data-md><var>rpEntity</var>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①③">Relying Party</a>'s <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrpentity" id="ref-for-dictdef-publickeycredentialrpentity⑥">PublicKeyCredentialRpEntity</a></code>.</p>
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①④">Relying Party</a>'s <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrpentity" id="ref-for-dictdef-publickeycredentialrpentity⑥">PublicKeyCredentialRpEntity</a></code>.</p>
     <dt data-md><var>userEntity</var>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⓪">user account’s</a> <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity⑤">PublicKeyCredentialUserEntity</a></code>, containing the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②②">user handle</a> given by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①④">Relying Party</a>.</p>
+     <p>The <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③①">user account’s</a> <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity⑤">PublicKeyCredentialUserEntity</a></code>, containing the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②②">user handle</a> given by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑤">Relying Party</a>.</p>
     <dt data-md><var>requireResidentKey</var>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#effective-resident-key-requirement-for-credential-creation" id="ref-for-effective-resident-key-requirement-for-credential-creation">effective resident key requirement for credential creation</a>, a Boolean value determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑦">client</a>.</p>
+     <p>The <a data-link-type="dfn" href="#effective-resident-key-requirement-for-credential-creation" id="ref-for-effective-resident-key-requirement-for-credential-creation">effective resident key requirement for credential creation</a>, a Boolean value determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑧">client</a>.</p>
     <dt data-md><var>requireUserPresence</var>
     <dd data-md>
      <p>The constant Boolean value <code>true</code>.
@@ -5041,14 +5048,14 @@ <h4 class="heading settled" data-level="6.3.2" id="sctn-op-make-cred"><span clas
 wish to make a <a data-link-type="dfn" href="#test-of-user-presence" id="ref-for-test-of-user-presence⑧">test of user presence</a> optional although WebAuthn does not.</p>
     <dt data-md><var>requireUserVerification</var>
     <dd data-md>
-     <p>The <a data-link-type="dfn" href="#effective-user-verification-requirement-for-credential-creation" id="ref-for-effective-user-verification-requirement-for-credential-creation">effective user verification requirement for credential creation</a>, a Boolean value determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑧">client</a>.</p>
+     <p>The <a data-link-type="dfn" href="#effective-user-verification-requirement-for-credential-creation" id="ref-for-effective-user-verification-requirement-for-credential-creation">effective user verification requirement for credential creation</a>, a Boolean value determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑨">client</a>.</p>
     <dt data-md><var>credTypesAndPubKeyAlgs</var>
     <dd data-md>
-     <p>A sequence of pairs of <code class="idl"><a data-link-type="idl" href="#enumdef-publickeycredentialtype" id="ref-for-enumdef-publickeycredentialtype⑧">PublicKeyCredentialType</a></code> and public key algorithms (<code class="idl"><a data-link-type="idl" href="#typedefdef-cosealgorithmidentifier" id="ref-for-typedefdef-cosealgorithmidentifier①①">COSEAlgorithmIdentifier</a></code>) requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑤">Relying Party</a>. This sequence is ordered from most preferred to least preferred. The <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨②">authenticator</a> makes a best-effort to create the most
+     <p>A sequence of pairs of <code class="idl"><a data-link-type="idl" href="#enumdef-publickeycredentialtype" id="ref-for-enumdef-publickeycredentialtype⑧">PublicKeyCredentialType</a></code> and public key algorithms (<code class="idl"><a data-link-type="idl" href="#typedefdef-cosealgorithmidentifier" id="ref-for-typedefdef-cosealgorithmidentifier①①">COSEAlgorithmIdentifier</a></code>) requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑥">Relying Party</a>. This sequence is ordered from most preferred to least preferred. The <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨②">authenticator</a> makes a best-effort to create the most
 preferred credential that it can.</p>
     <dt data-md><var>excludeCredentialDescriptorList</var>
     <dd data-md>
-     <p>An OPTIONAL list of <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor①②">PublicKeyCredentialDescriptor</a></code> objects provided by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑥">Relying Party</a> with the intention that, if any of
+     <p>An OPTIONAL list of <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor①②">PublicKeyCredentialDescriptor</a></code> objects provided by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑦">Relying Party</a> with the intention that, if any of
 these are known to the authenticator, it SHOULD NOT create a new credential. <var>excludeCredentialDescriptorList</var> contains a
 list of known credentials.</p>
     <dt data-md><var>enterpriseAttestationPossible</var>
@@ -5056,11 +5063,11 @@ <h4 class="heading settled" data-level="6.3.2" id="sctn-op-make-cred"><span clas
      <p>A Boolean value that indicates that individually-identifying attestation MAY be returned by the authenticator.</p>
     <dt data-md><var>attestationFormats</var>
     <dd data-md>
-     <p>A sequence of strings that expresses the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑦">Relying Party</a>'s preference for attestation statement formats, from most to least preferable. If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨③">authenticator</a> returns <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑤">attestation</a>, then it makes a best-effort attempt to use the most preferable format that it supports.</p>
+     <p>A sequence of strings that expresses the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑧">Relying Party</a>'s preference for attestation statement formats, from most to least preferable. If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨③">authenticator</a> returns <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑤">attestation</a>, then it makes a best-effort attempt to use the most preferable format that it supports.</p>
     <dt data-md><var>extensions</var>
     <dd data-md>
-     <p>A <a data-link-type="dfn" href="#cbor" id="ref-for-cbor⑨">CBOR</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#ordered-map" id="ref-for-ordered-map①⓪">map</a> from <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier⑤">extension identifiers</a> to their <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input①">authenticator extension inputs</a>, created by the <a data-link-type="dfn" href="#client" id="ref-for-client⑦⑨">client</a> based on
-the extensions requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑧">Relying Party</a>, if any.</p>
+     <p>A <a data-link-type="dfn" href="#cbor" id="ref-for-cbor⑨">CBOR</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#ordered-map" id="ref-for-ordered-map①⓪">map</a> from <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier⑤">extension identifiers</a> to their <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input①">authenticator extension inputs</a>, created by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⓪">client</a> based on
+the extensions requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑨">Relying Party</a>, if any.</p>
    </dl>
    <p class="note" role="note"><span class="marker">Note:</span> Before performing this operation, all other operations in progress in the <a data-link-type="dfn" href="#authenticator-session" id="ref-for-authenticator-session②">authenticator session</a> MUST be aborted by
 running the <a data-link-type="dfn" href="#authenticatorcancel" id="ref-for-authenticatorcancel①①">authenticatorCancel</a> operation.</p>
@@ -5091,7 +5098,7 @@ <h4 class="heading settled" data-level="6.3.2" id="sctn-op-make-cred"><span clas
        </dl>
        <p class="note" role="note"><span class="marker">Note:</span> The purpose of this <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture①⑨">authorization gesture</a> is not to proceed with creating a credential,
 but for privacy reasons to authorize disclosure of the fact that <code><var>descriptor</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-id" id="ref-for-dom-publickeycredentialdescriptor-id⑧">id</a></code></code> is <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①③">bound</a> to this <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑤">authenticator</a>.
-If the user consents, the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⓪">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②①⑨">Relying Party</a> can detect this and guide the user to use a different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑥">authenticator</a>.
+If the user consents, the <a data-link-type="dfn" href="#client" id="ref-for-client⑧①">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⓪">Relying Party</a> can detect this and guide the user to use a different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑥">authenticator</a>.
 If the user does not consent,
 the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑦">authenticator</a> does not reveal that <code><var>descriptor</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialdescriptor-id" id="ref-for-dom-publickeycredentialdescriptor-id⑨">id</a></code></code> is <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①④">bound</a> to it,
 and responds as if the user simply declined consent to create a credential.</p>
@@ -5105,7 +5112,7 @@ <h4 class="heading settled" data-level="6.3.2" id="sctn-op-make-cred"><span clas
     <li id="op-makecred-step-user-consent">
      <a class="self-link" href="#op-makecred-step-user-consent"></a> Collect an <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture②⓪">authorization gesture</a> confirming <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent①⑦">user consent</a> for creating a new credential.
     The prompt for the <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture②①">authorization gesture</a> is shown by the
-    authenticator if it has its own output capability, or by the user agent otherwise. The prompt SHOULD display <code><var>rpEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrpentity-id" id="ref-for-dom-publickeycredentialrpentity-id①①">id</a></code></code>, <code><var>rpEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①②">name</a></code></code>, <code><var>userEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①③">name</a></code></code> and <code><var>userEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①②">displayName</a></code></code>, if possible. 
+    authenticator if it has its own output capability, or by the user agent otherwise. The prompt SHOULD display <code><var>rpEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrpentity-id" id="ref-for-dom-publickeycredentialrpentity-id①①">id</a></code></code>, <code><var>rpEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①②">name</a></code></code>, <code><var>userEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①③">name</a></code></code> and <code><var>userEntity</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①①">displayName</a></code></code>, if possible. 
      <p>If <var>requireUserVerification</var> is <code>true</code>, the <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture②②">authorization gesture</a> MUST include <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification④①">user verification</a>.</p>
      <p>If <var>requireUserPresence</var> is <code>true</code>, the <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture②③">authorization gesture</a> MUST include a <a data-link-type="dfn" href="#test-of-user-presence" id="ref-for-test-of-user-presence①⓪">test of user presence</a>.</p>
      <p>If the user does not <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent①⑧">consent</a> or if <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification④②">user verification</a> fails, return an error code equivalent to
@@ -5201,7 +5208,7 @@ <h4 class="heading settled" data-level="6.3.3" id="sctn-op-get-assertion"><span
      <p>The <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data①⓪">hash of the serialized client data</a>, provided by the client.</p>
     <dt data-md><var>allowCredentialDescriptorList</var>
     <dd data-md>
-     <p>An OPTIONAL <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list" id="ref-for-list⑤">list</a> of <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor①③">PublicKeyCredentialDescriptor</a></code>s describing credentials acceptable to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⓪">Relying Party</a> (possibly filtered
+     <p>An OPTIONAL <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list" id="ref-for-list⑤">list</a> of <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialdescriptor" id="ref-for-dictdef-publickeycredentialdescriptor①③">PublicKeyCredentialDescriptor</a></code>s describing credentials acceptable to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②①">Relying Party</a> (possibly filtered
 by the client), if any.</p>
     <dt data-md><var>requireUserPresence</var>
     <dd data-md>
@@ -5216,11 +5223,11 @@ <h4 class="heading settled" data-level="6.3.3" id="sctn-op-get-assertion"><span
      <p>A Boolean value that indicates that individually-identifying attestation MAY be returned by the authenticator.</p>
     <dt data-md><var>attestationFormats</var>
     <dd data-md>
-     <p>A sequence of strings that expresses the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②①">Relying Party</a>'s preference for attestation statement formats, from most to least preferable. If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑨">authenticator</a> returns <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑥">attestation</a>, then it makes a best-effort attempt to use the most preferable format that it supports.</p>
+     <p>A sequence of strings that expresses the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②②">Relying Party</a>'s preference for attestation statement formats, from most to least preferable. If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator①⑨⑨">authenticator</a> returns <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑥">attestation</a>, then it makes a best-effort attempt to use the most preferable format that it supports.</p>
     <dt data-md><var>extensions</var>
     <dd data-md>
      <p>A <a data-link-type="dfn" href="#cbor" id="ref-for-cbor①⓪">CBOR</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#ordered-map" id="ref-for-ordered-map①①">map</a> from <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier⑦">extension identifiers</a> to their <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input③">authenticator extension inputs</a>, created by the client based on
-the extensions requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②②">Relying Party</a>, if any.</p>
+the extensions requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②③">Relying Party</a>, if any.</p>
    </dl>
    <p class="note" role="note"><span class="marker">Note:</span> Before performing this operation, all other operations in progress in the <a data-link-type="dfn" href="#authenticator-session" id="ref-for-authenticator-session③">authenticator session</a> MUST be aborted by running the <a data-link-type="dfn" href="#authenticatorcancel" id="ref-for-authenticatorcancel①②">authenticatorCancel</a> operation.</p>
    <p>When this method is invoked, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪⓪">authenticator</a> MUST perform the following procedure:</p>
@@ -5309,7 +5316,7 @@ <h4 class="heading settled" data-level="6.3.3" id="sctn-op-get-assertion"><span
        <p class="note" role="note"><span class="marker">Note:</span> In cases where <var>allowCredentialDescriptorList</var> was supplied the returned <a data-link-type="dfn" href="#public-key-credential-source-userhandle" id="ref-for-public-key-credential-source-userhandle③">userHandle</a> value may be <code>null</code>, see: <a data-link-type="dfn" href="#assertioncreationdata-userhandleresult" id="ref-for-assertioncreationdata-userhandleresult⑤">userHandleResult</a>.</p>
      </ul>
    </ol>
-   <p>If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪④">authenticator</a> cannot find any <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential④⑧">credential</a> corresponding to the specified <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②③">Relying Party</a> that
+   <p>If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪④">authenticator</a> cannot find any <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential④⑧">credential</a> corresponding to the specified <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②④">Relying Party</a> that
 matches the specified criteria, it terminates the operation and returns an error.</p>
    <h4 class="heading settled" data-level="6.3.4" id="sctn-op-cancel"><span class="secno">6.3.4. </span><span class="content">The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticatorcancel">authenticatorCancel</dfn> Operation</span><a class="self-link" href="#sctn-op-cancel"></a></h4>
    <p>This operation takes no input parameters and returns no result.</p>
@@ -5323,7 +5330,7 @@ <h4 class="heading settled" data-level="6.3.5" id="sctn-op-silent-discovery"><sp
    <dl>
     <dt data-md><var>rpId</var>
     <dd data-md>
-     <p>The caller’s <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑥">RP ID</a>, as <a href="#GetAssn-DetermineRpId">determined</a> by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧①">client</a>.</p>
+     <p>The caller’s <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑥">RP ID</a>, as <a href="#GetAssn-DetermineRpId">determined</a> by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧②">client</a>.</p>
    </dl>
    <p>When this operation is invoked, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪⑤">authenticator</a> MUST perform the following procedure:</p>
    <ol>
@@ -5362,7 +5369,7 @@ <h4 class="heading settled" data-level="6.3.5" id="sctn-op-silent-discovery"><sp
      <p>Return <var>collectedDiscoverableCredentialMetadata</var>.</p>
    </ol>
    <h3 class="heading settled" data-level="6.4" id="sctn-strings"><span class="secno">6.4. </span><span class="content">String Handling</span><a class="self-link" href="#sctn-strings"></a></h3>
-   <p>Authenticators may be required to store arbitrary strings chosen by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②④">Relying Party</a>, for example the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①④">name</a></code> and <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①③">displayName</a></code> in a <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity⑥">PublicKeyCredentialUserEntity</a></code>. This section discusses some practical consequences of handling arbitrary strings that may be presented to humans.</p>
+   <p>Authenticators may be required to store arbitrary strings chosen by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑤">Relying Party</a>, for example the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialentity-name" id="ref-for-dom-publickeycredentialentity-name①④">name</a></code> and <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-displayname" id="ref-for-dom-publickeycredentialuserentity-displayname①②">displayName</a></code> in a <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity⑥">PublicKeyCredentialUserEntity</a></code>. This section discusses some practical consequences of handling arbitrary strings that may be presented to humans.</p>
    <h4 class="heading settled" data-level="6.4.1" id="sctn-strings-truncation"><span class="secno">6.4.1. </span><span class="content">String Truncation</span><a class="self-link" href="#sctn-strings-truncation"></a></h4>
    <p>Each arbitrary string in the API will have some accommodation for the potentially limited resources available to an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪⑦">authenticator</a>. If string value truncation is the chosen accommodation then authenticators MAY truncate in order to make the string fit within a length equal or greater than the specified minimum supported length. Such truncation SHOULD also respect UTF-8 sequence boundaries or <a data-link-type="dfn" href="https://w3c.github.io/i18n-glossary/#dfn-grapheme-cluster" id="ref-for-dfn-grapheme-cluster">grapheme cluster</a> boundaries <a data-link-type="biblio" href="#biblio-uax29" title="UNICODE Text Segmentation">[UAX29]</a>. This defines the maximum truncation permitted and authenticators MUST NOT truncate further.</p>
    <p>For example, in <a href="#fig-stringTruncation">figure <span class="figure-num-following"></span></a> the string is 65 bytes long. If truncating to 64 bytes then the final 0x88 byte must be removed purely because of space reasons. Since that leaves a partial UTF-8 sequence the remainder of that sequence may also be removed. Since that leaves a partial <a data-link-type="dfn" href="https://w3c.github.io/i18n-glossary/#dfn-grapheme-cluster" id="ref-for-dfn-grapheme-cluster①">grapheme cluster</a> an authenticator may remove the remainder of that cluster.</p>
@@ -5370,7 +5377,7 @@ <h4 class="heading settled" data-level="6.4.1" id="sctn-strings-truncation"><spa
      <img src="images/string-truncation.svg"> 
     <figcaption>The end of a UTF-8 encoded string showing the positions of different truncation boundaries.</figcaption>
    </figure>
-   <p><a data-link-type="dfn" href="#conforming-user-agent" id="ref-for-conforming-user-agent④">Conforming User Agents</a> are responsible for ensuring that the authenticator behavior observed by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑤">Relying Parties</a> conforms to this specification with respect to string handling. For example, if an authenticator is known to behave incorrectly when asked to store large strings, the user agent SHOULD perform the truncation for it in order to maintain the model from the point of view of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑥">Relying Party</a>. User-agents that do this SHOULD truncate at <a data-link-type="dfn" href="https://w3c.github.io/i18n-glossary/#dfn-grapheme-cluster" id="ref-for-dfn-grapheme-cluster②">grapheme cluster</a> boundaries.</p>
+   <p><a data-link-type="dfn" href="#conforming-user-agent" id="ref-for-conforming-user-agent④">Conforming User Agents</a> are responsible for ensuring that the authenticator behavior observed by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑥">Relying Parties</a> conforms to this specification with respect to string handling. For example, if an authenticator is known to behave incorrectly when asked to store large strings, the user agent SHOULD perform the truncation for it in order to maintain the model from the point of view of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑦">Relying Party</a>. User-agents that do this SHOULD truncate at <a data-link-type="dfn" href="https://w3c.github.io/i18n-glossary/#dfn-grapheme-cluster" id="ref-for-dfn-grapheme-cluster②">grapheme cluster</a> boundaries.</p>
    <p>Truncation based on UTF-8 sequences alone may cause a <a data-link-type="dfn" href="https://w3c.github.io/i18n-glossary/#dfn-grapheme-cluster" id="ref-for-dfn-grapheme-cluster③">grapheme cluster</a> to be truncated. This could make the grapheme cluster render as a different glyph, potentially changing the meaning of the string, instead of removing the glyph entirely.</p>
    <p>In addition to that, truncating on byte boundaries alone causes a known issue that user agents should be aware of: if the authenticator is using <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> then future messages from the authenticator may contain invalid CBOR since the value is typed as a CBOR string and thus is required to be valid UTF-8. User agents are tasked with handling this to avoid burdening authenticators with understanding character encodings and Unicode character properties. Thus, when dealing with <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⓪⑧">authenticators</a>, user agents SHOULD:</p>
    <ol>
@@ -5397,13 +5404,13 @@ <h3 class="heading settled" data-level="6.5" id="sctn-attestation"><span class="
 If an authenticator does, the basic requirement is that the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①①">authenticator</a> can
 produce, for each <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key②④">credential public key</a>, an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②①">attestation statement</a> verifiable by the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party②⑨">WebAuthn Relying Party</a>. Typically, this <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②②">attestation statement</a> contains a signature by an <a data-link-type="dfn" href="#attestation-private-key" id="ref-for-attestation-private-key①">attestation private key</a> over the attested <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key②⑤">credential public key</a> and
 a challenge, as well as a certificate or similar data providing provenance information for the <a data-link-type="dfn" href="#attestation-public-key" id="ref-for-attestation-public-key">attestation public key</a>,
-enabling the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑦">Relying Party</a> to make a trust decision. However, if an <a data-link-type="dfn" href="#attestation-key-pair" id="ref-for-attestation-key-pair②">attestation key pair</a> is not available, then the authenticator
+enabling the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑧">Relying Party</a> to make a trust decision. However, if an <a data-link-type="dfn" href="#attestation-key-pair" id="ref-for-attestation-key-pair②">attestation key pair</a> is not available, then the authenticator
 MAY either perform <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑦">self attestation</a> of the <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key②⑥">credential public key</a> with the corresponding <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①⑦">credential private key</a>,
 or otherwise perform <a data-link-type="dfn" href="#none" id="ref-for-none①">no attestation</a>.</p>
    <p>All this information is returned by <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①②">authenticators</a> any time a new <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential④⑨">public key credential</a> is generated, and optionally when exercised, in the overall form of an <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="attestation-object">attestation object</dfn>. The relationship of the <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object①④">attestation object</a> with <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data④⓪">authenticator data</a> (containing <a data-link-type="dfn" href="#attested-credential-data" id="ref-for-attested-credential-data①⓪">attested credential data</a>) and the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②③">attestation statement</a> is illustrated in <a href="#fig-attStructs">figure <span class="figure-num-following"></span></a>, below.</p>
    <p>If an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①③">authenticator</a> employs <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑧">self attestation</a> or <a data-link-type="dfn" href="#none" id="ref-for-none②">no attestation</a>, then no provenance information is provided
-for the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑧">Relying Party</a> to base a trust decision on.
-In these cases, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①④">authenticator</a> provides no guarantees about its operation to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑨">Relying Party</a>.</p>
+for the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②②⑨">Relying Party</a> to base a trust decision on.
+In these cases, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①④">authenticator</a> provides no guarantees about its operation to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⓪">Relying Party</a>.</p>
    <figure id="fig-attStructs">
      <img src="images/fido-attestation-structures.svg"> 
     <figcaption><a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object①⑤">Attestation object</a> layout illustrating the included <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data④①">authenticator data</a> from a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②⑤">create()</a></code> operation (containing <a data-link-type="dfn" href="#attested-credential-data" id="ref-for-attested-credential-data①①">attested credential
@@ -5415,7 +5422,7 @@ <h3 class="heading settled" data-level="6.5" id="sctn-attestation"><span class="
 data object, containing statements about a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤⓪">public key credential</a> itself and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①⑤">authenticator</a> that created it. It
 contains an <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature⑦">attestation signature</a> created using the key of the attesting authority (except for the case of <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation⑨">self
 attestation</a>, when it is created using the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key①⑧">credential private key</a>). In order to correctly interpret an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⑤">attestation
-statement</a>, a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⓪">Relying Party</a> needs to understand these two aspects of <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑧">attestation</a>:</p>
+statement</a>, a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③①">Relying Party</a> needs to understand these two aspects of <a data-link-type="dfn" href="#attestation" id="ref-for-attestation①⑧">attestation</a>:</p>
    <ol>
     <li data-md>
      <p>The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="attestation-statement-format">attestation statement format</dfn> is the manner in which the signature is represented and the various contextual
@@ -5423,7 +5430,7 @@ <h3 class="heading settled" data-level="6.5" id="sctn-attestation"><span class="
 syntax of the statement. Various existing components and OS platforms (such as TPMs and the Android OS) have previously defined <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format⑦">attestation statement formats</a>. This specification supports a variety of such formats in an extensible way, as defined in <a href="#sctn-attestation-formats">§ 6.5.3 Attestation Statement Formats</a>. The formats themselves are identified by strings, as described in <a href="#sctn-attstn-fmt-ids">§ 8.1 Attestation Statement Format Identifiers</a>.</p>
     <li data-md>
      <p>The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="attestation-type">attestation type</dfn> defines the semantics of <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⑥">attestation statements</a> and their underlying trust models.
-Specifically, it defines how a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③①">Relying Party</a> establishes trust in a particular <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⑦">attestation statement</a>, after verifying that it
+Specifically, it defines how a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③②">Relying Party</a> establishes trust in a particular <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement②⑦">attestation statement</a>, after verifying that it
 is cryptographically valid. This specification supports a number of <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type">attestation types</a>, as described in <a href="#sctn-attestation-types">§ 6.5.4 Attestation Types</a>.</p>
    </ol>
    <p>In general, there is no simple mapping between <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format⑧">attestation statement formats</a> and <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①">attestation types</a>. For example, the
@@ -5440,16 +5447,16 @@ <h3 class="heading settled" data-level="6.5" id="sctn-attestation"><span class="
      <p>The characteristics of the individual <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①⑦">authenticator</a>, such as its construction, whether part or all of it runs in a secure
 operating environment, and so on.</p>
    </ul>
-   <p>The <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type④">attestation type</a> and <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format①①">attestation statement format</a> is chosen by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①⑧">authenticator</a>; <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③②">Relying Parties</a> can only signal their preferences by setting the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-attestation" id="ref-for-dom-publickeycredentialcreationoptions-attestation④">attestation</a></code> and <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-attestationformats" id="ref-for-dom-publickeycredentialcreationoptions-attestationformats②">attestationFormats</a></code> parameters, or those with the same names in <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①①">PublicKeyCredentialRequestOptions</a></code>.</p>
+   <p>The <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type④">attestation type</a> and <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format①①">attestation statement format</a> is chosen by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①⑧">authenticator</a>; <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③③">Relying Parties</a> can only signal their preferences by setting the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-attestation" id="ref-for-dom-publickeycredentialcreationoptions-attestation④">attestation</a></code> and <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-attestationformats" id="ref-for-dom-publickeycredentialcreationoptions-attestationformats②">attestationFormats</a></code> parameters, or those with the same names in <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①①">PublicKeyCredentialRequestOptions</a></code>.</p>
    <p>It is expected that most <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②①⑨">authenticators</a> will support a small number of <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type⑤">attestation types</a> and <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format①②">attestation statement
-formats</a>, while <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③③">Relying Parties</a> will decide what <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type⑥">attestation types</a> are acceptable to them by policy. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③④">Relying Parties</a> will also need to
+formats</a>, while <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③④">Relying Parties</a> will decide what <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type⑥">attestation types</a> are acceptable to them by policy. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑤">Relying Parties</a> will also need to
 understand the characteristics of the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⓪">authenticators</a> that they trust, based on information they have about these <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②①">authenticators</a>. For example, the FIDO Metadata Service <a data-link-type="biblio" href="#biblio-fidometadataservice" title="FIDO Metadata Service">[FIDOMetadataService]</a> provides one way to access such information.</p>
    <h4 class="heading settled" data-level="6.5.1" id="sctn-attestation-in-assertions"><span class="secno">6.5.1. </span><span class="content">Attestation in assertions</span><a class="self-link" href="#sctn-attestation-in-assertions"></a></h4>
-   <p>Attestation is most commonly provided during credential creation. However, if supported by the authenticator and requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑤">Relying Party</a> using the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-attestation" id="ref-for-dom-publickeycredentialrequestoptions-attestation③">attestation</a></code> parameter, attestation MAY be provided in <a data-link-type="dfn" href="#assertion" id="ref-for-assertion④">assertions</a>.</p>
+   <p>Attestation is most commonly provided during credential creation. However, if supported by the authenticator and requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑥">Relying Party</a> using the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-attestation" id="ref-for-dom-publickeycredentialrequestoptions-attestation③">attestation</a></code> parameter, attestation MAY be provided in <a data-link-type="dfn" href="#assertion" id="ref-for-assertion④">assertions</a>.</p>
    <p>Attestations in <a data-link-type="dfn" href="#assertion" id="ref-for-assertion⑤">assertions</a> could be helpful in at least the following situations:</p>
    <ol>
     <li data-md>
-     <p>For <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑥">multi-device credentials</a>, the <a data-link-type="dfn" href="#generating-authenticator" id="ref-for-generating-authenticator④">generating authenticator</a> may have returned a meaningfully different attestation than the authenticator currently exercising the credential. Thus returning an attestation for each use of the credential allows the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑥">Relying Party</a> to observe these changes.</p>
+     <p>For <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑥">multi-device credentials</a>, the <a data-link-type="dfn" href="#generating-authenticator" id="ref-for-generating-authenticator④">generating authenticator</a> may have returned a meaningfully different attestation than the authenticator currently exercising the credential. Thus returning an attestation for each use of the credential allows the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑦">Relying Party</a> to observe these changes.</p>
     <li data-md>
      <p>If the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format①③">attestation statement format</a> involves a 3rd-party attesting to the state of the authenticator, then returning an attestation with each use of the credential allows for the continued good health of the authenticator to be attested.</p>
    </ol>
@@ -5585,12 +5592,12 @@ <h4 class="heading settled" data-level="6.5.3" id="sctn-attestation-formats"><sp
    <h4 class="heading settled" data-level="6.5.4" id="sctn-attestation-types"><span class="secno">6.5.4. </span><span class="content">Attestation Types</span><a class="self-link" href="#sctn-attestation-types"></a></h4>
    <p>WebAuthn supports several <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type⑨">attestation types</a>, defining the semantics of <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③③">attestation statements</a> and their underlying trust
 models:</p>
-   <p class="note" role="note"><span class="marker">Note:</span> This specification does not define any data structures explicitly expressing the <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①⓪">attestation types</a> employed by <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②③">authenticators</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑦">Relying Parties</a> engaging in <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③④">attestation statement</a> <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure">verification</a> — i.e., when
+   <p class="note" role="note"><span class="marker">Note:</span> This specification does not define any data structures explicitly expressing the <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①⓪">attestation types</a> employed by <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②③">authenticators</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑧">Relying Parties</a> engaging in <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③④">attestation statement</a> <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure">verification</a> — i.e., when
 calling <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②⑧">navigator.credentials.create()</a></code> they select an <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance④">attestation conveyance</a> other than <code class="idl"><a data-link-type="idl" href="#dom-attestationconveyancepreference-none" id="ref-for-dom-attestationconveyancepreference-none⑥">none</a></code> and verify the received <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③⑤">attestation statement</a> — will determine the employed <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①①">attestation type</a> as a part of <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①">verification</a>. See the "Verification procedure" subsections of <a href="#sctn-defined-attestation-formats">§ 8 Defined Attestation Statement Formats</a>. See also <a href="#sctn-attestation-privacy">§ 14.4.1 Attestation Privacy</a>. For all <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①②">attestation types</a> defined in this
-section other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①①">Self</a> and <a data-link-type="dfn" href="#none" id="ref-for-none③">None</a>, <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑧">Relying Party</a> <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure②">verification</a> is followed by
+section other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①①">Self</a> and <a data-link-type="dfn" href="#none" id="ref-for-none③">None</a>, <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑨">Relying Party</a> <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure②">verification</a> is followed by
 matching the <a data-link-type="dfn" href="#attestation-trust-path" id="ref-for-attestation-trust-path①">trust path</a> to an acceptable root certificate per <a href="#reg-ceremony-assess-trust">step 23</a> of <a href="#sctn-registering-a-new-credential">§ 7.1 Registering a New Credential</a>.
 Differentiating these <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①③">attestation types</a> becomes useful primarily as a means for determining if the <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②①">attestation</a> is acceptable
-under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②③⑨">Relying Party</a> policy.</p>
+under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⓪">Relying Party</a> policy.</p>
    <dl>
     <dt data-md><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="basic-attestation">Basic Attestation</dfn> (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="basic">Basic</dfn>)
     <dd data-md>
@@ -5608,12 +5615,12 @@ <h4 class="heading settled" data-level="6.5.4" id="sctn-attestation-types"><span
 "endorsement key" (EK). This key is used to securely communicate with a trusted third party, the <a data-link-type="dfn" href="#attestation-ca" id="ref-for-attestation-ca①">Attestation CA</a> <a data-link-type="biblio" href="#biblio-tcg-cmcprofile-aikcertenroll" title="TCG Infrastructure Working Group: A CMC Profile for AIK Certificate Enrollment">[TCG-CMCProfile-AIKCertEnroll]</a> (formerly known as a "Privacy CA"). The <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑤">authenticator</a> can generate multiple
 attestation identity key pairs (AIK) and requests an <a data-link-type="dfn" href="#attestation-ca" id="ref-for-attestation-ca②">Attestation CA</a> to issue an AIK certificate
 for each. Using this approach, such an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑥">authenticator</a> can limit the exposure of the EK (which is a global correlation
-handle) to Attestation CA(s). AIKs can be requested for each <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑦">authenticator</a>-generated <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤②">public key credential</a> individually, and conveyed to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⓪">Relying Parties</a> as <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate③">attestation certificates</a>.</p>
+handle) to Attestation CA(s). AIKs can be requested for each <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑦">authenticator</a>-generated <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤②">public key credential</a> individually, and conveyed to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④①">Relying Parties</a> as <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate③">attestation certificates</a>.</p>
      <p class="note" role="note"><span class="marker">Note:</span> This concept typically leads to multiple attestation certificates. The attestation certificate requested most recently
     is called "active".</p>
     <dt data-md><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="anonymization-ca">Anonymization CA</dfn> (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="anonca">AnonCA</dfn>)
     <dd data-md>
-     <p>In this case, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑧">authenticator</a> uses an <a data-link-type="dfn" href="#anonymization-ca" id="ref-for-anonymization-ca③">Anonymization CA</a> which dynamically generates per-<a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑦">credential</a> <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate④">attestation certificates</a> such that the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③⑥">attestation statements</a> presented to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④①">Relying Parties</a> do not provide uniquely identifiable information, e.g., that might be used for tracking purposes.</p>
+     <p>In this case, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②②⑧">authenticator</a> uses an <a data-link-type="dfn" href="#anonymization-ca" id="ref-for-anonymization-ca③">Anonymization CA</a> which dynamically generates per-<a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑦">credential</a> <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate④">attestation certificates</a> such that the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③⑥">attestation statements</a> presented to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④②">Relying Parties</a> do not provide uniquely identifiable information, e.g., that might be used for tracking purposes.</p>
      <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement③⑦">Attestation statements</a> conveying <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②②">attestations</a> of <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①④">type</a> <a data-link-type="dfn" href="#attca" id="ref-for-attca">AttCA</a> or <a data-link-type="dfn" href="#anonca" id="ref-for-anonca">AnonCA</a> use the same data structure
     as those of <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①⑤">type</a> <a data-link-type="dfn" href="#basic" id="ref-for-basic">Basic</a>, so the three attestation types
     are, in general, distinguishable only with externally provided knowledge regarding the contents of the <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate⑤">attestation
@@ -5688,17 +5695,17 @@ <h4 class="heading settled" data-level="6.5.6" id="sctn-signature-attestation-ty
 The signature is not ASN.1 wrapped.</p>
    </ul>
    <h2 class="heading settled" data-level="7" id="sctn-rp-operations"><span class="secno">7. </span><span class="content"><a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⓪">WebAuthn Relying Party</a> Operations</span><a class="self-link" href="#sctn-rp-operations"></a></h2>
-   <p>A <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑨">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②④">authentication ceremony</a> begins with the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③①">WebAuthn Relying Party</a> creating a <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①①">PublicKeyCredentialCreationOptions</a></code> or <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①②">PublicKeyCredentialRequestOptions</a></code> object, respectively, which encodes the parameters for the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①②">ceremony</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④②">Relying Party</a> SHOULD take care to not leak sensitive information during this stage; see <a href="#sctn-username-enumeration">§ 14.6.2 Username Enumeration</a> for details.</p>
-   <p>Upon successful execution of <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②⑨">create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⓪">get()</a></code>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④③">Relying Party</a>'s script receives
+   <p>A <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony⑨">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②④">authentication ceremony</a> begins with the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③①">WebAuthn Relying Party</a> creating a <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①①">PublicKeyCredentialCreationOptions</a></code> or <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①②">PublicKeyCredentialRequestOptions</a></code> object, respectively, which encodes the parameters for the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①②">ceremony</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④③">Relying Party</a> SHOULD take care to not leak sensitive information during this stage; see <a href="#sctn-username-enumeration">§ 14.6.2 Username Enumeration</a> for details.</p>
+   <p>Upon successful execution of <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create②⑨">create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⓪">get()</a></code>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④④">Relying Party</a>'s script receives
 a <code class="idl"><a data-link-type="idl" href="#publickeycredential" id="ref-for-publickeycredential②⑤">PublicKeyCredential</a></code> containing an <code class="idl"><a data-link-type="idl" href="#authenticatorattestationresponse" id="ref-for-authenticatorattestationresponse⑦">AuthenticatorAttestationResponse</a></code> or <code class="idl"><a data-link-type="idl" href="#authenticatorassertionresponse" id="ref-for-authenticatorassertionresponse⑨">AuthenticatorAssertionResponse</a></code> structure,
-respectively, from the client. It must then deliver the contents of this structure to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④④">Relying Party</a> server, using methods outside
-the scope of this specification. This section describes the operations that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑤">Relying Party</a> must perform upon receipt of these
+respectively, from the client. It must then deliver the contents of this structure to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑤">Relying Party</a> server, using methods outside
+the scope of this specification. This section describes the operations that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑥">Relying Party</a> must perform upon receipt of these
 structures.</p>
    <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credential"><span class="secno">7.1. </span><span class="content">Registering a New Credential</span><a class="self-link" href="#sctn-registering-a-new-credential"></a></h3>
-   <p>In order to perform a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⓪">registration ceremony</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑥">Relying Party</a> MUST proceed as follows:</p>
+   <p>In order to perform a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⓪">registration ceremony</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑦">Relying Party</a> MUST proceed as follows:</p>
    <ol>
     <li data-md>
-     <p>Let <var>options</var> be a new <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①②">PublicKeyCredentialCreationOptions</a></code> structure configured to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑦">Relying Party</a>'s needs for the ceremony.</p>
+     <p>Let <var>options</var> be a new <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①②">PublicKeyCredentialCreationOptions</a></code> structure configured to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑧">Relying Party</a>'s needs for the ceremony.</p>
     <li data-md>
      <p>Call <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⓪">navigator.credentials.create()</a></code> and pass <var>options</var> as the <code><code class="idl"><a data-link-type="idl" href="#dom-credentialcreationoptions-publickey" id="ref-for-dom-credentialcreationoptions-publickey④">publicKey</a></code></code> option.
 Let <var>credential</var> be the result of the successfully resolved promise.
@@ -5726,17 +5733,17 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
     <li data-md>
      <p>Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-challenge" id="ref-for-dom-collectedclientdata-challenge⑥">challenge</a></code></code> equals
 the base64url encoding of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-challenge" id="ref-for-dom-publickeycredentialcreationoptions-challenge②">challenge</a></code></code>.</p>
-    <li id="rp-op-registering-a-new-credential-step-origin"><a class="self-link" href="#rp-op-registering-a-new-credential-step-origin"></a> Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑦">origin</a></code></code> is an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①④">origin</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑧">Relying Party</a>.
+    <li id="rp-op-registering-a-new-credential-step-origin"><a class="self-link" href="#rp-op-registering-a-new-credential-step-origin"></a> Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑦">origin</a></code></code> is an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①④">origin</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑨">Relying Party</a>.
   See <a href="#sctn-validating-origin">§ 13.4.9 Validating the origin of a credential</a> for guidance. 
     <li data-md>
      <p>If <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin⑦">topOrigin</a></code></code> is present:</p>
      <ol>
       <li data-md>
-       <p>Verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②④⑨">Relying Party</a> expects that this credential would have been created within an iframe that is
+       <p>Verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⓪">Relying Party</a> expects that this credential would have been created within an iframe that is
 not <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#same-origin-with-its-ancestors" id="ref-for-same-origin-with-its-ancestors④">same-origin with its ancestors</a>.</p>
       <li data-md>
        <p>Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin⑧">topOrigin</a></code></code> matches the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①⑤">origin</a> of a page
-that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⓪">Relying Party</a> expects to be sub-framed within.
+that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤①">Relying Party</a> expects to be sub-framed within.
 See <a href="#sctn-validating-origin">§ 13.4.9 Validating the origin of a credential</a> for guidance.</p>
      </ol>
     <li data-md>
@@ -5744,29 +5751,29 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
     <li data-md>
      <p>Perform CBOR decoding on the <code class="idl"><a data-link-type="idl" href="#dom-authenticatorattestationresponse-attestationobject" id="ref-for-dom-authenticatorattestationresponse-attestationobject⑧">attestationObject</a></code> field of the <code class="idl"><a data-link-type="idl" href="#authenticatorattestationresponse" id="ref-for-authenticatorattestationresponse⑨">AuthenticatorAttestationResponse</a></code> structure to obtain the attestation statement format <var>fmt</var>, the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data④⑨">authenticator data</a> <var>authData</var>, and the attestation statement <var>attStmt</var>.</p>
     <li data-md>
-     <p>Verify that the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash②">rpIdHash</a></code> in <var>authData</var> is the SHA-256 hash of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑦">RP ID</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤①">Relying Party</a>.</p>
+     <p>Verify that the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash②">rpIdHash</a></code> in <var>authData</var> is the SHA-256 hash of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑦">RP ID</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤②">Relying Party</a>.</p>
     <li data-md>
      <p>Verify that the <a data-link-type="dfn" href="#authdata-flags-up" id="ref-for-authdata-flags-up③">UP</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑤">flags</a></code> in <var>authData</var> is set.</p>
     <li data-md>
-     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤②">Relying Party</a> requires <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification④④">user verification</a> for this registration,
+     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤③">Relying Party</a> requires <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification④④">user verification</a> for this registration,
 verify that the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①②">UV</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑥">flags</a></code> in <var>authData</var> is set.</p>
     <li data-md>
      <p>If the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be⑥">BE</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑦">flags</a></code> in <var>authData</var> is not set, verify that the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs⑦">BS</a> bit is not set.</p>
     <li data-md>
-     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤③">Relying Party</a> uses the credential’s <a data-link-type="dfn" href="#backup-eligibility" id="ref-for-backup-eligibility③">backup eligibility</a> to inform its user experience flows and/or policies, evaluate the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be⑦">BE</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑧">flags</a></code> in <var>authData</var>.</p>
+     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤④">Relying Party</a> uses the credential’s <a data-link-type="dfn" href="#backup-eligibility" id="ref-for-backup-eligibility③">backup eligibility</a> to inform its user experience flows and/or policies, evaluate the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be⑦">BE</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑧">flags</a></code> in <var>authData</var>.</p>
     <li data-md>
-     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤④">Relying Party</a> uses the credential’s <a data-link-type="dfn" href="#backup-state" id="ref-for-backup-state③">backup state</a> to inform its user experience flows and/or policies, evaluate the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs⑧">BS</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑨">flags</a></code> in <var>authData</var>.</p>
+     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑤">Relying Party</a> uses the credential’s <a data-link-type="dfn" href="#backup-state" id="ref-for-backup-state③">backup state</a> to inform its user experience flows and/or policies, evaluate the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs⑧">BS</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags③⑨">flags</a></code> in <var>authData</var>.</p>
     <li data-md>
      <p>Verify that the "alg" parameter in the <a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialpublickey" id="ref-for-authdata-attestedcredentialdata-credentialpublickey⑤">credential public key</a> in <var>authData</var> matches the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialparameters-alg" id="ref-for-dom-publickeycredentialparameters-alg②">alg</a></code> attribute of one of the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-item" id="ref-for-list-item①②">items</a> in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-pubkeycredparams" id="ref-for-dom-publickeycredentialcreationoptions-pubkeycredparams④">pubKeyCredParams</a></code></code>.</p>
     <li id="reg-ceremony-verify-extension-outputs">
      <a class="self-link" href="#reg-ceremony-verify-extension-outputs"></a> Verify that the values of the <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑥">client extension outputs</a> in <var>clientExtensionResults</var> and the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output③">authenticator extension
     outputs</a> in the <code><a data-link-type="dfn" href="#authdata-extensions" id="ref-for-authdata-extensions⑦">extensions</a></code> in <var>authData</var> are as expected, considering the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input⑤">client
-    extension input</a> values that were given in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions④">extensions</a></code></code> and any specific policy of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑤">Relying Party</a> regarding unsolicited extensions, i.e., those that were not specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑤">extensions</a></code></code>.
-    In the general case, the meaning of "are as expected" is specific to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑥">Relying Party</a> and which extensions are in use. 
-     <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑧">Client platforms</a> MAY enact local policy that sets additional <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension③">authenticator extensions</a> or <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension②">client extensions</a> and thus cause values to appear in the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output④">authenticator extension outputs</a> or <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑦">client extension outputs</a> that were not originally specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑥">extensions</a></code></code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑦">Relying Parties</a> MUST be prepared to handle such
-    situations, whether it be to ignore the unsolicited extensions or reject the attestation. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑧">Relying Party</a> can make this
+    extension input</a> values that were given in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions④">extensions</a></code></code> and any specific policy of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑥">Relying Party</a> regarding unsolicited extensions, i.e., those that were not specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑤">extensions</a></code></code>.
+    In the general case, the meaning of "are as expected" is specific to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑦">Relying Party</a> and which extensions are in use. 
+     <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑧">Client platforms</a> MAY enact local policy that sets additional <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension③">authenticator extensions</a> or <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension②">client extensions</a> and thus cause values to appear in the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output④">authenticator extension outputs</a> or <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑦">client extension outputs</a> that were not originally specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑥">extensions</a></code></code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑧">Relying Parties</a> MUST be prepared to handle such
+    situations, whether it be to ignore the unsolicited extensions or reject the attestation. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑨">Relying Party</a> can make this
     decision based on local policy and the extensions in use.</p>
-     <p class="note" role="note"><span class="marker">Note:</span> Since all extensions are OPTIONAL for both the <a data-link-type="dfn" href="#client" id="ref-for-client⑧②">client</a> and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②③③">authenticator</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑤⑨">Relying Party</a> MUST also be
+     <p class="note" role="note"><span class="marker">Note:</span> Since all extensions are OPTIONAL for both the <a data-link-type="dfn" href="#client" id="ref-for-client⑧③">client</a> and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②③③">authenticator</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⓪">Relying Party</a> MUST also be
     prepared to handle cases where none or not all of the requested extensions were acted upon.</p>
      <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey①">devicePubKey</a> extension has explicit verification procedures, see <a href="#sctn-device-publickey-extension-verification-create">§ 10.2.2.3.1 Registration (create())</a>.</p>
     <li data-md>
@@ -5786,9 +5793,9 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
      <a class="self-link" href="#reg-ceremony-assess-trust"></a> Assess the attestation trustworthiness using the outputs of the <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure⑤">verification procedure</a> in <a href="#reg-ceremony-verify-attestation">step 21</a>, as follows: 
      <ul>
       <li data-md>
-       <p>If <a data-link-type="dfn" href="#none" id="ref-for-none④">no attestation</a> was provided, verify that <a data-link-type="dfn" href="#none" id="ref-for-none⑤">None</a> attestation is acceptable under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⓪">Relying Party</a> policy.</p>
+       <p>If <a data-link-type="dfn" href="#none" id="ref-for-none④">no attestation</a> was provided, verify that <a data-link-type="dfn" href="#none" id="ref-for-none⑤">None</a> attestation is acceptable under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥①">Relying Party</a> policy.</p>
       <li data-md>
-       <p>If <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①③">self attestation</a> was used, verify that <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①④">self attestation</a> is acceptable under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥①">Relying Party</a> policy.</p>
+       <p>If <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①③">self attestation</a> was used, verify that <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①④">self attestation</a> is acceptable under <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥②">Relying Party</a> policy.</p>
       <li data-md>
        <p>Otherwise, use the X.509 certificates returned as the <a data-link-type="dfn" href="#attestation-trust-path" id="ref-for-attestation-trust-path②">attestation trust path</a> from the <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure⑥">verification procedure</a> to verify that the attestation public key either correctly chains up to an acceptable root certificate, or is itself an acceptable certificate
 (i.e., it and the root certificate obtained in <a href="#reg-ceremony-attestation-trust-anchors">Step 22</a> may be the same).</p>
@@ -5796,11 +5803,11 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
     <li data-md>
      <p>Verify that the <code><a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialid" id="ref-for-authdata-attestedcredentialdata-credentialid④">credentialId</a></code> is ≤ 1023 bytes. Credential IDs larger than this many bytes SHOULD cause the RP to fail this <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①①">registration ceremony</a>.</p>
     <li data-md>
-     <p>Verify that the <code><a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialid" id="ref-for-authdata-attestedcredentialdata-credentialid⑤">credentialId</a></code> is not yet registered for any user. If the <code><a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialid" id="ref-for-authdata-attestedcredentialdata-credentialid⑥">credentialId</a></code> is already known then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥②">Relying Party</a> SHOULD fail this <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①②">registration ceremony</a>.</p>
-     <p class="note" role="note"><span class="marker">NOTE:</span> The rationale for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥③">Relying Parties</a> rejecting duplicate <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③②">credential IDs</a> is as follows: <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③③">credential IDs</a> contain sufficient entropy that accidental duplication is very unlikely. However, <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①⑥">attestation types</a> other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑤">self attestation</a> do not include a self-signature to explicitly prove possession of the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②⓪">credential private key</a> at <a data-link-type="dfn" href="#registration" id="ref-for-registration①⑨">registration</a> time. Thus an attacker who has managed to obtain a user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③④">credential ID</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⓪">credential public key</a> for a site (this could be potentially accomplished in various ways), could attempt to register a victim’s credential as their own at that site. If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥④">Relying Party</a> accepts this new registration and replaces the victim’s existing credential registration, and the <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①④">credentials are discoverable</a>, then the victim could be forced to sign into the attacker’s account at their next attempt. Data saved to the site by the victim in that state would then be available to the attacker.</p>
+     <p>Verify that the <code><a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialid" id="ref-for-authdata-attestedcredentialdata-credentialid⑤">credentialId</a></code> is not yet registered for any user. If the <code><a data-link-type="dfn" href="#authdata-attestedcredentialdata-credentialid" id="ref-for-authdata-attestedcredentialdata-credentialid⑥">credentialId</a></code> is already known then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥③">Relying Party</a> SHOULD fail this <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①②">registration ceremony</a>.</p>
+     <p class="note" role="note"><span class="marker">NOTE:</span> The rationale for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥④">Relying Parties</a> rejecting duplicate <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③②">credential IDs</a> is as follows: <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③③">credential IDs</a> contain sufficient entropy that accidental duplication is very unlikely. However, <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type①⑥">attestation types</a> other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑤">self attestation</a> do not include a self-signature to explicitly prove possession of the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②⓪">credential private key</a> at <a data-link-type="dfn" href="#registration" id="ref-for-registration①⑨">registration</a> time. Thus an attacker who has managed to obtain a user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③④">credential ID</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⓪">credential public key</a> for a site (this could be potentially accomplished in various ways), could attempt to register a victim’s credential as their own at that site. If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑤">Relying Party</a> accepts this new registration and replaces the victim’s existing credential registration, and the <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①④">credentials are discoverable</a>, then the victim could be forced to sign into the attacker’s account at their next attempt. Data saved to the site by the victim in that state would then be available to the attacker.</p>
     <li id="reg-ceremony-store-credential-record">
      <a class="self-link" href="#reg-ceremony-store-credential-record"></a> If the attestation statement <var>attStmt</var> verified successfully and is found to be trustworthy,
-    then create and store a new <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑥">credential record</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③①">user account</a> that was denoted in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-user" id="ref-for-dom-publickeycredentialcreationoptions-user⑥">user</a></code></code>,
+    then create and store a new <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑥">credential record</a> in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③②">user account</a> that was denoted in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-user" id="ref-for-dom-publickeycredentialcreationoptions-user⑥">user</a></code></code>,
     with the following contents: 
      <dl>
       <dt data-md><a data-link-type="abstract-op" href="#abstract-opdef-credential-record-type" id="ref-for-abstract-opdef-credential-record-type①">type</a>
@@ -5809,7 +5816,7 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
       <dt data-md><a data-link-type="abstract-op" href="#abstract-opdef-credential-record-id" id="ref-for-abstract-opdef-credential-record-id①">id</a>
       <dd data-md>
        <p><code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credential-id" id="ref-for-dom-credential-id①">id</a></code></code> or <code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid②">rawId</a></code></code>,
-whichever format is preferred by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑤">Relying Party</a>.</p>
+whichever format is preferred by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑥">Relying Party</a>.</p>
       <dt data-md><a data-link-type="abstract-op" href="#abstract-opdef-credential-record-publickey" id="ref-for-abstract-opdef-credential-record-publickey">publicKey</a>
       <dd data-md>
        <p>The <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③①">credential public key</a> in <var>authData</var>.</p>
@@ -5840,22 +5847,22 @@ <h3 class="heading settled" data-level="7.1" id="sctn-registering-a-new-credenti
      </dl>
     <li data-md>
      <p>If the attestation statement <var>attStmt</var> successfully verified but is not trustworthy per <a href="#reg-ceremony-assess-trust">step 23</a> above,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑥">Relying Party</a> SHOULD fail the <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①③">registration ceremony</a>.</p>
-     <p class="note" role="note"><span class="marker">NOTE:</span> However, if permitted by policy, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑦">Relying Party</a> MAY register the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③⑤">credential ID</a> and credential public key but treat the
-    credential as one with <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑥">self attestation</a> (see <a href="#sctn-attestation-types">§ 6.5.4 Attestation Types</a>). If doing so, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑧">Relying Party</a> is asserting there
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑦">Relying Party</a> SHOULD fail the <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①③">registration ceremony</a>.</p>
+     <p class="note" role="note"><span class="marker">NOTE:</span> However, if permitted by policy, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑧">Relying Party</a> MAY register the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id③⑤">credential ID</a> and credential public key but treat the
+    credential as one with <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑥">self attestation</a> (see <a href="#sctn-attestation-types">§ 6.5.4 Attestation Types</a>). If doing so, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑨">Relying Party</a> is asserting there
     is no cryptographic proof that the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤③">public key credential</a> has been generated by a particular <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②③④">authenticator</a> model.
     See <a data-link-type="biblio" href="#biblio-fidosecref" title="FIDO Security Reference">[FIDOSecRef]</a> and <a data-link-type="biblio" href="#biblio-uafprotocol" title="FIDO UAF Protocol Specification v1.0">[UAFProtocol]</a> for a more detailed discussion.</p>
    </ol>
-   <p>Verification of <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object②③">attestation objects</a> requires that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑥⑨">Relying Party</a> has a trusted method of determining acceptable trust anchors
+   <p>Verification of <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object②③">attestation objects</a> requires that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⓪">Relying Party</a> has a trusted method of determining acceptable trust anchors
 in <a href="#reg-ceremony-attestation-trust-anchors">step 22</a> above.
-Also, if certificates are being used, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⓪">Relying Party</a> MUST have access to certificate status information for the
-intermediate CA certificates. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦①">Relying Party</a> MUST also be able to build the attestation certificate chain if the client did not
+Also, if certificates are being used, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦①">Relying Party</a> MUST have access to certificate status information for the
+intermediate CA certificates. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦②">Relying Party</a> MUST also be able to build the attestation certificate chain if the client did not
 provide this chain in the attestation information.</p>
    <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span class="secno">7.2. </span><span class="content">Verifying an Authentication Assertion</span><a class="self-link" href="#sctn-verifying-assertion"></a></h3>
-   <p>In order to perform an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑤">authentication ceremony</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦②">Relying Party</a> MUST proceed as follows:</p>
+   <p>In order to perform an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑤">authentication ceremony</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦③">Relying Party</a> MUST proceed as follows:</p>
    <ol>
     <li data-md>
-     <p>Let <var>options</var> be a new <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①③">PublicKeyCredentialRequestOptions</a></code> structure configured to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦③">Relying Party</a>'s needs for the ceremony.</p>
+     <p>Let <var>options</var> be a new <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①③">PublicKeyCredentialRequestOptions</a></code> structure configured to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦④">Relying Party</a>'s needs for the ceremony.</p>
     <li data-md>
      <p>Call <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③①">navigator.credentials.get()</a></code> and pass <var>options</var> as the <code><code class="idl"><a data-link-type="idl" href="#dom-credentialrequestoptions-publickey" id="ref-for-dom-credentialrequestoptions-publickey④">publicKey</a></code></code> option.
 Let <var>credential</var> be the result of the successfully resolved promise.
@@ -5875,14 +5882,14 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
      <dl class="switch">
       <dt data-md>If the user was identified before the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑥">authentication ceremony</a> was initiated, e.g., via a username or cookie,
       <dd data-md>
-       <p>verify that the identified <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③②">user account</a> contains a <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑨">credential record</a> whose <a data-link-type="abstract-op" href="#abstract-opdef-credential-record-id" id="ref-for-abstract-opdef-credential-record-id②">id</a> equals <code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid③">rawId</a></code></code>.
+       <p>verify that the identified <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③③">user account</a> contains a <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record⑨">credential record</a> whose <a data-link-type="abstract-op" href="#abstract-opdef-credential-record-id" id="ref-for-abstract-opdef-credential-record-id②">id</a> equals <code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid③">rawId</a></code></code>.
 Let <var>credentialRecord</var> be that <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record①⓪">credential record</a>.
 If <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑥">userHandle</a></code></code> is present,
-verify that it equals the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②④">user handle</a> of the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③③">user account</a>.</p>
+verify that it equals the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②④">user handle</a> of the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③④">user account</a>.</p>
       <dt data-md>If the user was not identified before the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑦">authentication ceremony</a> was initiated,
       <dd data-md>
        <p>verify that <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑦">userHandle</a></code></code> is present.
-Verify that the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③④">user account</a> identified by <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑧">userHandle</a></code></code> contains a <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record①①">credential record</a> whose <a data-link-type="abstract-op" href="#abstract-opdef-credential-record-id" id="ref-for-abstract-opdef-credential-record-id③">id</a> equals <code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid④">rawId</a></code></code>.
+Verify that the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑤">user account</a> identified by <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-userhandle" id="ref-for-dom-authenticatorassertionresponse-userhandle⑧">userHandle</a></code></code> contains a <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record①①">credential record</a> whose <a data-link-type="abstract-op" href="#abstract-opdef-credential-record-id" id="ref-for-abstract-opdef-credential-record-id③">id</a> equals <code><var>credential</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-rawid" id="ref-for-dom-publickeycredential-rawid④">rawId</a></code></code>.
 Let <var>credentialRecord</var> be that <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record①②">credential record</a>.</p>
      </dl>
     <li data-md>
@@ -5901,20 +5908,20 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
     <li data-md>
      <p>Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-challenge" id="ref-for-dom-collectedclientdata-challenge⑦">challenge</a></code></code> equals
 the base64url encoding of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-challenge" id="ref-for-dom-publickeycredentialrequestoptions-challenge③">challenge</a></code></code>.</p>
-    <li id="rp-op-verifying-assertion-step-origin"><a class="self-link" href="#rp-op-verifying-assertion-step-origin"></a> Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑧">origin</a></code></code> is an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①⑥">origin</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦④">Relying Party</a>.
+    <li id="rp-op-verifying-assertion-step-origin"><a class="self-link" href="#rp-op-verifying-assertion-step-origin"></a> Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑧">origin</a></code></code> is an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①⑥">origin</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑤">Relying Party</a>.
   See <a href="#sctn-validating-origin">§ 13.4.9 Validating the origin of a credential</a> for guidance. 
     <li data-md>
      <p>If <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin⑨">topOrigin</a></code></code> is present:</p>
      <ol>
       <li data-md>
-       <p>Verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑤">Relying Party</a> expects this credential to be used within an iframe that is not <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#same-origin-with-its-ancestors" id="ref-for-same-origin-with-its-ancestors⑤">same-origin with its ancestors</a>.</p>
+       <p>Verify that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑥">Relying Party</a> expects this credential to be used within an iframe that is not <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#same-origin-with-its-ancestors" id="ref-for-same-origin-with-its-ancestors⑤">same-origin with its ancestors</a>.</p>
       <li data-md>
        <p>Verify that the value of <code><var>C</var>.<code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin①⓪">topOrigin</a></code></code> matches the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/origin.html#concept-origin" id="ref-for-concept-origin①⑦">origin</a> of a page
-that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑥">Relying Party</a> expects to be sub-framed within.
+that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑦">Relying Party</a> expects to be sub-framed within.
 See <a href="#sctn-validating-origin">§ 13.4.9 Validating the origin of a credential</a> for guidance.</p>
      </ol>
     <li id="rp-op-verifying-assertion-step-rpid-hash">
-     <a class="self-link" href="#rp-op-verifying-assertion-step-rpid-hash"></a> Verify that the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash③">rpIdHash</a></code> in <var>authData</var> is the SHA-256 hash of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑧">RP ID</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑦">Relying Party</a>. 
+     <a class="self-link" href="#rp-op-verifying-assertion-step-rpid-hash"></a> Verify that the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash③">rpIdHash</a></code> in <var>authData</var> is the SHA-256 hash of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id③⑧">RP ID</a> expected by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑧">Relying Party</a>. 
      <p class="note" role="note"><span class="marker">Note:</span> If using the <a data-link-type="dfn" href="#appid" id="ref-for-appid①">appid</a> extension, this step needs some special logic. See <a href="#sctn-appid-extension">§ 10.1.1 FIDO AppID Extension (appid)</a> for details.</p>
     <li data-md>
      <p>Verify that the <a data-link-type="dfn" href="#authdata-flags-up" id="ref-for-authdata-flags-up④">UP</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④③">flags</a></code> in <var>authData</var> is set.</p>
@@ -5926,7 +5933,7 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
     <li data-md>
      <p>If the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be⑨">BE</a> bit of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④⑥">flags</a></code> in <var>authData</var> is not set, verify that the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs①⓪">BS</a> bit is not set.</p>
     <li data-md>
-     <p>If the credential <a data-link-type="dfn" href="#backup-state" id="ref-for-backup-state④">backup state</a> is used as part of <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑧">Relying Party</a> business logic or policy,
+     <p>If the credential <a data-link-type="dfn" href="#backup-state" id="ref-for-backup-state④">backup state</a> is used as part of <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑨">Relying Party</a> business logic or policy,
 let <var>currentBe</var> and <var>currentBs</var> be the values of the <a data-link-type="dfn" href="#authdata-flags-be" id="ref-for-authdata-flags-be①⓪">BE</a> and <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs①①">BS</a> bits, respectively,
 of the <code><a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④⑦">flags</a></code> in <var>authData</var>.
 Compare <var>currentBe</var> and <var>currentBs</var> with <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-backupeligible" id="ref-for-abstract-opdef-credential-record-backupeligible①">backupEligible</a></code> and <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-backupstate" id="ref-for-abstract-opdef-credential-record-backupstate①">backupState</a></code>:</p>
@@ -5936,18 +5943,18 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
       <li data-md>
        <p>If <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-backupeligible" id="ref-for-abstract-opdef-credential-record-backupeligible③">backupEligible</a></code> is not set, verify that <var>currentBe</var> is not set.</p>
       <li data-md>
-       <p>Apply <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑦⑨">Relying Party</a> policy, if any.</p>
+       <p>Apply <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⓪">Relying Party</a> policy, if any.</p>
      </ol>
-     <p class="note" role="note"><span class="marker">Note:</span> See <a href="#sctn-credential-backup">§ 6.1.3 Credential Backup State</a> for examples of how a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⓪">Relying Party</a> might process the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs①②">BS</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④⑧">flag</a> values.</p>
+     <p class="note" role="note"><span class="marker">Note:</span> See <a href="#sctn-credential-backup">§ 6.1.3 Credential Backup State</a> for examples of how a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧①">Relying Party</a> might process the <a data-link-type="dfn" href="#authdata-flags-bs" id="ref-for-authdata-flags-bs①②">BS</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④⑧">flag</a> values.</p>
     <li id="authn-ceremony-verify-extension-outputs">
      <a class="self-link" href="#authn-ceremony-verify-extension-outputs"></a> Verify that the values of the <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑧">client extension outputs</a> in <var>clientExtensionResults</var> and the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output⑤">authenticator extension
     outputs</a> in the <code><a data-link-type="dfn" href="#authdata-extensions" id="ref-for-authdata-extensions⑧">extensions</a></code> in <var>authData</var> are as expected, considering the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input⑥">client
-    extension input</a> values that were given in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions④">extensions</a></code></code> and any specific policy of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧①">Relying Party</a> regarding unsolicited extensions, i.e., those that were not specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions⑤">extensions</a></code></code>.
-    In the general case, the meaning of "are as expected" is specific to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧②">Relying Party</a> and which extensions are in use. 
-     <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑨">Client platforms</a> MAY enact local policy that sets additional <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension④">authenticator extensions</a> or <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension③">client extensions</a> and thus cause values to appear in the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output⑥">authenticator extension outputs</a> or <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑨">client extension outputs</a> that were not originally specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions⑥">extensions</a></code></code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧③">Relying Parties</a> MUST be prepared to handle such
-    situations, whether it be to ignore the unsolicited extensions or reject the assertion. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧④">Relying Party</a> can make this
+    extension input</a> values that were given in <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions④">extensions</a></code></code> and any specific policy of the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧②">Relying Party</a> regarding unsolicited extensions, i.e., those that were not specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions⑤">extensions</a></code></code>.
+    In the general case, the meaning of "are as expected" is specific to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧③">Relying Party</a> and which extensions are in use. 
+     <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform④⑨">Client platforms</a> MAY enact local policy that sets additional <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension④">authenticator extensions</a> or <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension③">client extensions</a> and thus cause values to appear in the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output⑥">authenticator extension outputs</a> or <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output⑨">client extension outputs</a> that were not originally specified as part of <code><var>options</var>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-extensions" id="ref-for-dom-publickeycredentialrequestoptions-extensions⑥">extensions</a></code></code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧④">Relying Parties</a> MUST be prepared to handle such
+    situations, whether it be to ignore the unsolicited extensions or reject the assertion. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑤">Relying Party</a> can make this
     decision based on local policy and the extensions in use.</p>
-     <p class="note" role="note"><span class="marker">Note:</span> Since all extensions are OPTIONAL for both the <a data-link-type="dfn" href="#client" id="ref-for-client⑧③">client</a> and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②③⑤">authenticator</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑤">Relying Party</a> MUST also be
+     <p class="note" role="note"><span class="marker">Note:</span> Since all extensions are OPTIONAL for both the <a data-link-type="dfn" href="#client" id="ref-for-client⑧④">client</a> and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②③⑤">authenticator</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑥">Relying Party</a> MUST also be
     prepared to handle cases where none or not all of the requested extensions were acted upon.</p>
      <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey②">devicePubKey</a> extension has explicit verification procedures, see <a href="#sctn-device-publickey-extension-verification-get">§ 10.2.2.3.2 Authentication (get())</a>.</p>
     <li data-md>
@@ -5969,13 +5976,13 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
         <dd>This is a signal that
           the authenticator may be cloned, i.e. at least
           two copies of the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②①">credential private key</a> may exist and are
-          being used in parallel. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑥">Relying Parties</a> should incorporate this information
+          being used in parallel. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑦">Relying Parties</a> should incorporate this information
           into their risk scoring.
-          Whether the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑦">Relying Party</a> updates <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-signcount" id="ref-for-abstract-opdef-credential-record-signcount④">signCount</a></code> below in this case, or not, or fails the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑧">authentication ceremony</a> or not, is <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑧">Relying Party</a>-specific. 
+          Whether the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑧">Relying Party</a> updates <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-signcount" id="ref-for-abstract-opdef-credential-record-signcount④">signCount</a></code> below in this case, or not, or fails the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑧">authentication ceremony</a> or not, is <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑨">Relying Party</a>-specific. 
        </dl>
      </ul>
     <li data-md>
-     <p>If <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject③">attestationObject</a></code></code> is present and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑧⑨">Relying Party</a> wishes to verify the attestation then perform CBOR decoding on <code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject④">attestationObject</a></code> to obtain the attestation statement format <var>fmt</var>, and the attestation statement <var>attStmt</var>.</p>
+     <p>If <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject③">attestationObject</a></code></code> is present and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⓪">Relying Party</a> wishes to verify the attestation then perform CBOR decoding on <code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject④">attestationObject</a></code> to obtain the attestation statement format <var>fmt</var>, and the attestation statement <var>attStmt</var>.</p>
      <ol>
       <li data-md>
        <p>Verify that the <code>AT</code> bit in the <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags④⑨">flags</a> field of <var>authData</var> is set, indicating that <a data-link-type="dfn" href="#attested-credential-data" id="ref-for-attested-credential-data①④">attested credential data</a> is included.</p>
@@ -6005,7 +6012,7 @@ <h3 class="heading settled" data-level="7.2" id="sctn-verifying-assertion"><span
        <p>OPTIONALLY, if <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject⑤">attestationObject</a></code></code> is present,
 update <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-attestationobject" id="ref-for-abstract-opdef-credential-record-attestationobject②">attestationObject</a></code> to the value of <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorassertionresponse-attestationobject" id="ref-for-dom-authenticatorassertionresponse-attestationobject⑥">attestationObject</a></code></code> and update <code><var>credentialRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-credential-record-attestationclientdatajson" id="ref-for-abstract-opdef-credential-record-attestationclientdatajson①">attestationClientDataJSON</a></code> to the value of <code><var>response</var>.<code class="idl"><a data-link-type="idl" href="#dom-authenticatorresponse-clientdatajson" id="ref-for-dom-authenticatorresponse-clientdatajson①①">clientDataJSON</a></code></code>.</p>
      </ol>
-     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⓪">Relying Party</a> performs additional security checks beyond these WebAuthn <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑨">authentication ceremony</a> steps,
+     <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨①">Relying Party</a> performs additional security checks beyond these WebAuthn <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony②⑨">authentication ceremony</a> steps,
     the above state updates SHOULD be deferred to after those additional checks are completed successfully.</p>
     <li data-md>
      <p>If all the above steps are successful, continue with the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⓪">authentication ceremony</a> as appropriate. Otherwise, fail the <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③①">authentication ceremony</a>.</p>
@@ -6456,7 +6463,7 @@ <h3 class="heading settled" data-level="8.6" id="sctn-fido-u2f-attestation"><spa
       <dt data-md>sig
       <dd data-md>
        <p>The <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature①⑤">attestation signature</a>.
-The signature was calculated over the (raw) U2F registration response message <a data-link-type="biblio" href="#biblio-fido-u2f-message-formats" title="FIDO U2F Raw Message Formats">[FIDO-U2F-Message-Formats]</a> received by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧④">client</a> from the authenticator.</p>
+The signature was calculated over the (raw) U2F registration response message <a data-link-type="biblio" href="#biblio-fido-u2f-message-formats" title="FIDO U2F Raw Message Formats">[FIDO-U2F-Message-Formats]</a> received by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑤">client</a> from the authenticator.</p>
      </dl>
     <dt data-md>Signing procedure
     <dd data-md>
@@ -6615,9 +6622,9 @@ <h2 class="heading settled" data-level="9" id="sctn-extensions"><span class="sec
      <p><a data-link-type="dfn" href="#client-extension-processing" id="ref-for-client-extension-processing⑥">Client extension processing</a> for <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension③">registration extensions</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension③">authentication extensions</a>.</p>
    </ul>
    <p>When creating a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤⑦">public key credential</a> or requesting an <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①③">authentication assertion</a>, a <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③④">WebAuthn Relying Party</a> can request the use of a set
-of extensions. These extensions will be invoked during the requested operation if they are supported by the client and/or the <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator⑦">WebAuthn Authenticator</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨①">Relying Party</a> sends the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input⑦">client extension input</a> for each extension in the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③③">get()</a></code> call
-(for <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension④">authentication extensions</a>) or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③②">create()</a></code> call (for <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension④">registration extensions</a>) to the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑤">client</a>.
-The <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑥">client</a> performs <a data-link-type="dfn" href="#client-extension-processing" id="ref-for-client-extension-processing⑦">client extension processing</a> for each extension that the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⓪">client platform</a> supports, and augments the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data①③">client data</a> as specified by each extension, by including the <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier⑨">extension identifier</a> and <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①⓪">client extension output</a> values.</p>
+of extensions. These extensions will be invoked during the requested operation if they are supported by the client and/or the <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator⑦">WebAuthn Authenticator</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨②">Relying Party</a> sends the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input⑦">client extension input</a> for each extension in the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③③">get()</a></code> call
+(for <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension④">authentication extensions</a>) or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③②">create()</a></code> call (for <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension④">registration extensions</a>) to the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑥">client</a>.
+The <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑦">client</a> performs <a data-link-type="dfn" href="#client-extension-processing" id="ref-for-client-extension-processing⑦">client extension processing</a> for each extension that the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⓪">client platform</a> supports, and augments the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data①③">client data</a> as specified by each extension, by including the <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier⑨">extension identifier</a> and <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①⓪">client extension output</a> values.</p>
    <p>An extension can also be an <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-extension">authenticator extension</dfn>, meaning that the extension involves communication with and
 processing by the authenticator. <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension⑤">Authenticator extensions</a> define the following steps and data:</p>
    <ul>
@@ -6635,11 +6642,11 @@ <h2 class="heading settled" data-level="9" id="sctn-extensions"><span class="sec
 Since <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output⑧">authenticator extension output</a> is returned as part of the signed <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data⑤①">authenticator data</a>, authenticator extensions
 MAY also specify an <a data-link-type="dfn" href="#unsigned-extension-outputs" id="ref-for-unsigned-extension-outputs">unsigned extension output</a>, e.g. for cases where an output itself depends on <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data⑤②">authenticator data</a>.
 Part of the <a data-link-type="dfn" href="#client-extension-processing" id="ref-for-client-extension-processing⑨">client extension processing</a> for <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension⑦">authenticator extensions</a> is to use the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output⑨">authenticator extension output</a> and <a data-link-type="dfn" href="#unsigned-extension-outputs" id="ref-for-unsigned-extension-outputs①">unsigned extension output</a> as an input to creating the <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①①">client extension output</a>.</p>
-   <p>All <a data-link-type="dfn" href="#webauthn-extensions" id="ref-for-webauthn-extensions⑨">WebAuthn Extensions</a> are OPTIONAL for both clients and authenticators. Thus, any extensions requested by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨②">Relying Party</a> MAY be
+   <p>All <a data-link-type="dfn" href="#webauthn-extensions" id="ref-for-webauthn-extensions⑨">WebAuthn Extensions</a> are OPTIONAL for both clients and authenticators. Thus, any extensions requested by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨③">Relying Party</a> MAY be
 ignored by the client browser or OS and not passed to the authenticator at all, or they MAY be ignored by the authenticator.
-Ignoring an extension is never considered a failure in WebAuthn API processing, so when <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨③">Relying Parties</a> include extensions with any
+Ignoring an extension is never considered a failure in WebAuthn API processing, so when <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨④">Relying Parties</a> include extensions with any
 API calls, they MUST be prepared to handle cases where some or all of those extensions are ignored.</p>
-   <p>All <a data-link-type="dfn" href="#webauthn-extensions" id="ref-for-webauthn-extensions①⓪">WebAuthn Extensions</a> MUST be defined in such a way that lack of support for them by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑦">client</a> or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④②">authenticator</a> does not endanger the user’s security or privacy.
+   <p>All <a data-link-type="dfn" href="#webauthn-extensions" id="ref-for-webauthn-extensions①⓪">WebAuthn Extensions</a> MUST be defined in such a way that lack of support for them by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑧">client</a> or <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④②">authenticator</a> does not endanger the user’s security or privacy.
 For instance, if an extension requires client processing, it could be defined in a manner that ensures
 that a naïve pass-through that simply transcodes <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input⑨">client extension inputs</a> from JSON to CBOR
 will produce a semantically invalid <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input⑧">authenticator extension input</a> value, resulting in the extension
@@ -6670,7 +6677,7 @@ <h3 class="heading settled" data-level="9.2" id="sctn-extension-specification"><
 the <a data-link-type="dfn" href="#authenticator-extension-processing" id="ref-for-authenticator-extension-processing③">authenticator extension processing</a> rules, and the <a data-link-type="dfn" href="#cbor" id="ref-for-cbor①⑤">CBOR</a> <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output①⓪">authenticator extension output</a> value.
 Extensions MAY specify <a data-link-type="dfn" href="#unsigned-extension-outputs" id="ref-for-unsigned-extension-outputs②">unsigned extension outputs</a>.</p>
    <p>Any <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑤">client extension</a> that is processed by the client MUST return a <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①③">client extension output</a> value so that the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⑤">WebAuthn Relying Party</a> knows that the extension was honored by the client. Similarly, any extension that requires authenticator processing MUST return
-an <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output①①">authenticator extension output</a> to let the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨④">Relying Party</a> know that the extension was honored by the authenticator. If an
+an <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output①①">authenticator extension output</a> to let the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑤">Relying Party</a> know that the extension was honored by the authenticator. If an
 extension does not otherwise require any result values, it SHOULD be defined as returning a JSON Boolean <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①④">client extension
 output</a> result, set to <code>true</code> to signify that the extension was understood and processed. Likewise, any <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension⑨">authenticator
 extension</a> that does not otherwise require any result values MUST return a value and SHOULD return a CBOR Boolean <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output①②">authenticator extension output</a> result, set to <code>true</code> to signify that the extension was understood and processed.</p>
@@ -6680,7 +6687,7 @@ <h3 class="heading settled" data-level="9.3" id="sctn-extension-request-paramete
 in the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⑥">get()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑤">create()</a></code> call,
 while the <a data-link-type="dfn" href="#cbor" id="ref-for-cbor①⑥">CBOR</a> <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="authenticator-extension-input">authenticator extension input</dfn> is
 passed from the client to the authenticator for <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension①⓪">authenticator extensions</a> during the processing of these calls.</p>
-   <p>A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑤">Relying Party</a> simultaneously requests the use of an extension and sets its <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①①">client extension input</a> by including an entry in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑦">extensions</a></code> option to the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑥">create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⑦">get()</a></code> call.
+   <p>A <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑥">Relying Party</a> simultaneously requests the use of an extension and sets its <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①①">client extension input</a> by including an entry in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-extensions" id="ref-for-dom-publickeycredentialcreationoptions-extensions⑦">extensions</a></code> option to the <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑥">create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⑦">get()</a></code> call.
 The entry key is the <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier①②">extension identifier</a> and the value is the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①②">client extension input</a>.</p>
    <p class="note" role="note"><span class="marker">Note:</span> Other documents have specified extensions where the extension input does not always use the <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier①③">extension identifier</a> as the entry key.
 New extensions SHOULD follow the above convention.</p>
@@ -6699,8 +6706,8 @@ <h3 class="heading settled" data-level="9.3" id="sctn-extension-request-paramete
 <c- p>});</c->
 </pre>
    <p>Extension definitions MUST specify the valid values for their <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①③">client extension input</a>. Clients SHOULD ignore extensions with
-an invalid <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①④">client extension input</a>. If an extension does not require any parameters from the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑥">Relying Party</a>, it SHOULD be defined
-as taking a Boolean client argument, set to <code>true</code> to signify that the extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑦">Relying Party</a>.</p>
+an invalid <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①④">client extension input</a>. If an extension does not require any parameters from the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑦">Relying Party</a>, it SHOULD be defined
+as taking a Boolean client argument, set to <code>true</code> to signify that the extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑧">Relying Party</a>.</p>
    <p>Extensions that only affect client processing need not specify <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input①⓪">authenticator extension input</a>. Extensions that have
 authenticator processing MUST specify the method of computing the <a data-link-type="dfn" href="#authenticator-extension-input" id="ref-for-authenticator-extension-input①①">authenticator extension input</a> from the <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①⑤">client extension
 input</a>,
@@ -6720,7 +6727,7 @@ <h3 class="heading settled" data-level="9.3" id="sctn-extension-request-paramete
    <p class="note" role="note"><span class="marker">Note:</span> Extensions should aim to define authenticator arguments that are as small as possible. Some authenticators communicate
     over low-bandwidth links such as Bluetooth Low-Energy or NFC.</p>
    <h3 class="heading settled" data-level="9.4" id="sctn-client-extension-processing"><span class="secno">9.4. </span><span class="content"><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="client-extension-processing">Client Extension Processing</dfn></span><a class="self-link" href="#sctn-client-extension-processing"></a></h3>
-   <p>Extensions MAY define additional processing requirements on the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑧">client</a> during the creation of credentials or the
+   <p>Extensions MAY define additional processing requirements on the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑨">client</a> during the creation of credentials or the
 generation of an assertion. The <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①⑦">client extension input</a> for the extension is used as an input to this client processing.
 For each supported <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑥">client extension</a>, the client adds an entry to the <var>clientExtensions</var> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#ordered-map" id="ref-for-ordered-map①②">map</a> with the <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier①⑥">extension identifier</a> as the key, and the extension’s <a data-link-type="dfn" href="#client-extension-input" id="ref-for-client-extension-input①⑧">client extension input</a> as the value.</p>
    <p>Likewise, the <a data-link-type="dfn" href="#client-extension-output" id="ref-for-client-extension-output①⑤">client extension outputs</a> are represented as a dictionary in the result of <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-getclientextensionresults" id="ref-for-dom-publickeycredential-getclientextensionresults④">getClientExtensionResults()</a></code> with <a data-link-type="dfn" href="#extension-identifier" id="ref-for-extension-identifier①⑦">extension identifiers</a> as keys, and the <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="client-extension-output">client extension output</dfn> value of each extension as the value.
@@ -6748,11 +6755,11 @@ <h3 class="heading settled" data-level="10.1" id="sctn-defined-client-extensions
    <h4 class="heading settled" data-level="10.1.1" id="sctn-appid-extension"><span class="secno">10.1.1. </span><span class="content">FIDO <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="appid">AppID</dfn> Extension (appid)</span><a class="self-link" href="#sctn-appid-extension"></a></h4>
    <p>This extension allows <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⑦">WebAuthn Relying Parties</a> that have previously registered a
 credential using the legacy FIDO U2F JavaScript API <a data-link-type="biblio" href="#biblio-fidou2fjavascriptapi" title="FIDO U2F JavaScript API">[FIDOU2FJavaScriptAPI]</a> to request an <a data-link-type="dfn" href="#assertion" id="ref-for-assertion⑥">assertion</a>. The
-FIDO APIs use an alternative identifier for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑧">Relying Parties</a> called an <var>AppID</var> <a data-link-type="biblio" href="#biblio-fido-appid" title="FIDO AppID and Facet Specification">[FIDO-APPID]</a>, and any credentials created using those APIs will be <a data-link-type="dfn" href="#scope" id="ref-for-scope①⑧">scoped</a> to
+FIDO APIs use an alternative identifier for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑨">Relying Parties</a> called an <var>AppID</var> <a data-link-type="biblio" href="#biblio-fido-appid" title="FIDO AppID and Facet Specification">[FIDO-APPID]</a>, and any credentials created using those APIs will be <a data-link-type="dfn" href="#scope" id="ref-for-scope①⑧">scoped</a> to
 that identifier. Without this extension, they would need to be re-registered in
 order to be <a data-link-type="dfn" href="#scope" id="ref-for-scope①⑨">scoped</a> to an <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④①">RP ID</a>.</p>
    <p>In addition to setting the <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsclientinputs-appid" id="ref-for-dom-authenticationextensionsclientinputs-appid">appid</a></code> extension input,
-using this extension requires some additional processing by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party②⑨⑨">Relying Party</a> in order to allow users to <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①③">authenticate</a> using their registered U2F credentials:</p>
+using this extension requires some additional processing by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⓪">Relying Party</a> in order to allow users to <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①③">authenticate</a> using their registered U2F credentials:</p>
    <ol>
     <li data-md>
      <p>List the desired U2F credentials in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials①⑨">allowCredentials</a></code> option
@@ -6775,8 +6782,8 @@ <h4 class="heading settled" data-level="10.1.1" id="sctn-appid-extension"><span
 credentials created with WebAuthn are not backwards compatible with the FIDO
 JavaScript APIs.</p>
    <p class="note" role="note"><span class="marker">Note:</span> <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsclientinputs-appid" id="ref-for-dom-authenticationextensionsclientinputs-appid②">appid</a></code> should be set to the AppID
-that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⓪">Relying Party</a> <em>previously</em> used in the legacy FIDO APIs.
-This might not be the same as the result of translating the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪①">Relying Party</a>'s WebAuthn <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④④">RP ID</a> to the AppID format,
+that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪①">Relying Party</a> <em>previously</em> used in the legacy FIDO APIs.
+This might not be the same as the result of translating the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪②">Relying Party</a>'s WebAuthn <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④④">RP ID</a> to the AppID format,
 e.g., the previously used AppID may have been "https://accounts.example.com"
 but the currently used <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④⑤">RP ID</a> might be "example.com".</p>
    <dl>
@@ -6823,7 +6830,7 @@ <h4 class="heading settled" data-level="10.1.1" id="sctn-appid-extension"><span
    <dl>
     <dt data-md>Client extension output
     <dd data-md>
-     <p>Returns the value of <var>output</var>. If true, the <var>AppID</var> was used and thus, when <a href="#rp-op-verifying-assertion-step-rpid-hash">verifying the assertion</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪②">Relying Party</a> MUST expect the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash⑤">rpIdHash</a></code> to be the hash of the <var>AppID</var>, not the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④⑦">RP ID</a>.</p>
+     <p>Returns the value of <var>output</var>. If true, the <var>AppID</var> was used and thus, when <a href="#rp-op-verifying-assertion-step-rpid-hash">verifying the assertion</a>, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪③">Relying Party</a> MUST expect the <code><a data-link-type="dfn" href="#authdata-rpidhash" id="ref-for-authdata-rpidhash⑤">rpIdHash</a></code> to be the hash of the <var>AppID</var>, not the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④⑦">RP ID</a>.</p>
 <pre class="idl highlight def"><c- b>partial</c-> <c- b>dictionary</c-> <a class="idl-code" data-link-type="dictionary" href="#dictdef-authenticationextensionsclientoutputs" id="ref-for-dictdef-authenticationextensionsclientoutputs⑤"><c- g>AuthenticationExtensionsClientOutputs</c-></a> {
   <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean⑦"><c- b>boolean</c-></a> <dfn class="idl-code" data-dfn-for="AuthenticationExtensionsClientOutputs" data-dfn-type="dict-member" data-export data-type="boolean " id="dom-authenticationextensionsclientoutputs-appid"><code><c- g>appid</c-></code><a class="self-link" href="#dom-authenticationextensionsclientoutputs-appid"></a></dfn>;
 };
@@ -6840,7 +6847,7 @@ <h4 class="heading settled" data-level="10.1.1" id="sctn-appid-extension"><span
    </dl>
    <h4 class="heading settled" data-level="10.1.2" id="sctn-appid-exclude-extension"><span class="secno">10.1.2. </span><span class="content">FIDO AppID Exclusion Extension (appidExclude)</span><a class="self-link" href="#sctn-appid-exclude-extension"></a></h4>
    <p>This registration extension allows <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⑧">WebAuthn Relying Parties</a> to exclude authenticators that contain specified credentials that were created with the legacy FIDO U2F JavaScript API <a data-link-type="biblio" href="#biblio-fidou2fjavascriptapi" title="FIDO U2F JavaScript API">[FIDOU2FJavaScriptAPI]</a>.</p>
-   <p>During a transition from the FIDO U2F JavaScript API, a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪③">Relying Party</a> may have a population of users with legacy credentials already registered. The <a href="#sctn-appid-extension">appid</a> extension allows the sign-in flow to be transitioned smoothly but, when transitioning the registration flow, the <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑤">excludeCredentials</a> field will not be effective in excluding authenticators with legacy credentials because its contents are taken to be WebAuthn credentials. This extension directs <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤①">client platforms</a> to consider the contents of <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑥">excludeCredentials</a> as both WebAuthn and legacy FIDO credentials. Note that U2F key handles commonly use <a data-link-type="dfn" href="#base64url-encoding" id="ref-for-base64url-encoding①④">base64url encoding</a> but must be decoded to their binary form when used in <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑦">excludeCredentials</a>.</p>
+   <p>During a transition from the FIDO U2F JavaScript API, a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪④">Relying Party</a> may have a population of users with legacy credentials already registered. The <a href="#sctn-appid-extension">appid</a> extension allows the sign-in flow to be transitioned smoothly but, when transitioning the registration flow, the <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑤">excludeCredentials</a> field will not be effective in excluding authenticators with legacy credentials because its contents are taken to be WebAuthn credentials. This extension directs <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤①">client platforms</a> to consider the contents of <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑥">excludeCredentials</a> as both WebAuthn and legacy FIDO credentials. Note that U2F key handles commonly use <a data-link-type="dfn" href="#base64url-encoding" id="ref-for-base64url-encoding①④">base64url encoding</a> but must be decoded to their binary form when used in <a href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials⑦">excludeCredentials</a>.</p>
    <dl>
     <dt data-md>Extension identifier
     <dd data-md>
@@ -6915,7 +6922,7 @@ <h4 class="heading settled" data-level="10.1.2" id="sctn-appid-exclude-extension
      </ol>
     <dt data-md>Client extension output
     <dd data-md>
-     <p>Returns the value <code>true</code> to indicate to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪④">Relying Party</a> that the extension was acted upon.</p>
+     <p>Returns the value <code>true</code> to indicate to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑤">Relying Party</a> that the extension was acted upon.</p>
 <pre class="idl highlight def"><c- b>partial</c-> <c- b>dictionary</c-> <a class="idl-code" data-link-type="dictionary" href="#dictdef-authenticationextensionsclientoutputs" id="ref-for-dictdef-authenticationextensionsclientoutputs⑥"><c- g>AuthenticationExtensionsClientOutputs</c-></a> {
   <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean⑧"><c- b>boolean</c-></a> <dfn class="idl-code" data-dfn-for="AuthenticationExtensionsClientOutputs" data-dfn-type="dict-member" data-export data-type="boolean " id="dom-authenticationextensionsclientoutputs-appidexclude"><code><c- g>appidExclude</c-></code><a class="self-link" href="#dom-authenticationextensionsclientoutputs-appidexclude"></a></dfn>;
 };
@@ -6931,7 +6938,7 @@ <h4 class="heading settled" data-level="10.1.2" id="sctn-appid-exclude-extension
      <p>None.</p>
    </dl>
    <h4 class="heading settled" data-level="10.1.3" id="sctn-authenticator-credential-properties-extension"><span class="secno">10.1.3. </span><span class="content">Credential Properties Extension (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="credprops">credProps</dfn>)</span><a class="self-link" href="#sctn-authenticator-credential-properties-extension"></a></h4>
-   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑧">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension⑨">registration extension</a> facilitates reporting certain <a data-link-type="dfn" href="#credential-properties" id="ref-for-credential-properties②">credential properties</a> known by the <a data-link-type="dfn" href="#client" id="ref-for-client⑧⑨">client</a> to the requesting <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⑨">WebAuthn Relying Party</a> upon creation of a <a data-link-type="dfn" href="#public-key-credential-source" id="ref-for-public-key-credential-source⑤⑨">public key credential source</a> as a result of a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①④">registration ceremony</a>.</p>
+   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑧">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension⑨">registration extension</a> facilitates reporting certain <a data-link-type="dfn" href="#credential-properties" id="ref-for-credential-properties②">credential properties</a> known by the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⓪">client</a> to the requesting <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party③⑨">WebAuthn Relying Party</a> upon creation of a <a data-link-type="dfn" href="#public-key-credential-source" id="ref-for-public-key-credential-source⑤⑨">public key credential source</a> as a result of a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①④">registration ceremony</a>.</p>
    <p>At this time, one <a data-link-type="dfn" href="#credential-properties" id="ref-for-credential-properties③">credential property</a> is defined: the <a data-link-type="dfn" href="#credentialpropertiesoutput-resident-key-credential-property" id="ref-for-credentialpropertiesoutput-resident-key-credential-property①">resident key credential property</a> (i.e., <a data-link-type="dfn" href="#credentialpropertiesoutput-client-side-discoverable-credential-property" id="ref-for-credentialpropertiesoutput-client-side-discoverable-credential-property">client-side discoverable credential property</a>).</p>
    <dl>
     <dt data-md>Extension identifier
@@ -6942,7 +6949,7 @@ <h4 class="heading settled" data-level="10.1.3" id="sctn-authenticator-credentia
      <p><a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⓪">Registration</a></p>
     <dt data-md>Client extension input
     <dd data-md>
-     <p>The Boolean value <code>true</code> to indicate that this extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑤">Relying Party</a>.</p>
+     <p>The Boolean value <code>true</code> to indicate that this extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑥">Relying Party</a>.</p>
 <pre class="idl highlight def"><c- b>partial</c-> <c- b>dictionary</c-> <a class="idl-code" data-link-type="dictionary" href="#dictdef-authenticationextensionsclientinputs" id="ref-for-dictdef-authenticationextensionsclientinputs⑧"><c- g>AuthenticationExtensionsClientInputs</c-></a> {
     <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean⑨"><c- b>boolean</c-></a> <dfn class="idl-code" data-dfn-for="AuthenticationExtensionsClientInputs" data-dfn-type="dict-member" data-export data-type="boolean " id="dom-authenticationextensionsclientinputs-credprops"><code><c- g>credProps</c-></code><a class="self-link" href="#dom-authenticationextensionsclientinputs-credprops"></a></dfn>;
 };
@@ -6970,7 +6977,7 @@ <h4 class="heading settled" data-level="10.1.3" id="sctn-authenticator-credentia
 If <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk②">rk</a></code> is <code>true</code>, the credential is a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⑤">discoverable credential</a>.
 If <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk③">rk</a></code> is <code>false</code>, the credential is a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①②">server-side credential</a>.
 If <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk④">rk</a></code> is not present, it is not known whether the credential is a <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⑥">discoverable credential</a> or a <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①③">server-side credential</a>.</p>
-        <p class="note" role="note"><span class="marker">Note:</span> some <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④③">authenticators</a> create <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⑦">discoverable credentials</a> even when not requested by the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤②">client platform</a>. Because of this, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤③">client platforms</a> may be forced to omit the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑤">rk</a></code> property because they lack the assurance to be able to set it to <code>false</code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑥">Relying Parties</a> should assume that, if the <code>credProps</code> extension is supported, then <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤④">client platforms</a> will endeavour to populate the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑥">rk</a></code> property. Therefore a missing <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑦">rk</a></code> indicates that the created credential is most likely a <a data-link-type="dfn" href="#non-discoverable-credential" id="ref-for-non-discoverable-credential④">non-discoverable credential</a>.</p>
+        <p class="note" role="note"><span class="marker">Note:</span> some <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④③">authenticators</a> create <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⑦">discoverable credentials</a> even when not requested by the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤②">client platform</a>. Because of this, <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤③">client platforms</a> may be forced to omit the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑤">rk</a></code> property because they lack the assurance to be able to set it to <code>false</code>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑦">Relying Parties</a> should assume that, if the <code>credProps</code> extension is supported, then <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤④">client platforms</a> will endeavour to populate the <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑥">rk</a></code> property. Therefore a missing <code class="idl"><a data-link-type="idl" href="#dom-credentialpropertiesoutput-rk" id="ref-for-dom-credentialpropertiesoutput-rk⑦">rk</a></code> indicates that the created credential is most likely a <a data-link-type="dfn" href="#non-discoverable-credential" id="ref-for-non-discoverable-credential④">non-discoverable credential</a>.</p>
       </dl>
      </div>
     <dt data-md>Authenticator extension input
@@ -6984,11 +6991,11 @@ <h4 class="heading settled" data-level="10.1.3" id="sctn-authenticator-credentia
      <p>None.</p>
    </dl>
    <h4 class="heading settled" data-level="10.1.4" id="prf-extension"><span class="secno">10.1.4. </span><span class="content">Pseudo-random function extension (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="prf">prf</dfn>)</span><a class="self-link" href="#prf-extension"></a></h4>
-   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑨">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①①">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension⑨">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑦">Relying Party</a> to evaluate outputs from a pseudo-random function (PRF) associated with a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑨">credential</a>. The PRFs provided by this extension map from <code class="idl"><a data-link-type="idl" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource①⓪">BufferSource</a></code>s of any length to 32-byte <code class="idl"><a data-link-type="idl" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource①①">BufferSource</a></code>s.</p>
+   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension⑨">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①①">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension⑨">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑧">Relying Party</a> to evaluate outputs from a pseudo-random function (PRF) associated with a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential①⑨">credential</a>. The PRFs provided by this extension map from <code class="idl"><a data-link-type="idl" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource①⓪">BufferSource</a></code>s of any length to 32-byte <code class="idl"><a data-link-type="idl" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource①①">BufferSource</a></code>s.</p>
    <p>As a motivating example, PRF outputs could be used as symmetric keys to encrypt user data. Such encrypted data would be inaccessible without the ability to get assertions from the associated <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②⓪">credential</a>. By using the provision below to evaluate the PRF at two inputs in a single <a data-link-type="dfn" href="#assertion" id="ref-for-assertion⑧">assertion</a> operation, the encryption key could be periodically rotated during <a data-link-type="dfn" href="#assertion" id="ref-for-assertion⑨">assertions</a> by choosing a fresh, random input and reencrypting under the new output. If the evaluation inputs are unpredictable then even an attacker who could satisfy <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification④⑨">user verification</a>, and who had time-limited access to the authenticator, could not learn the encryption key without also knowing the correct PRF input.</p>
    <p>This extension is implemented on top of the <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> <code>hmac-secret</code> extension. It is a separate <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①⓪">client extension</a> because <code>hmac-secret</code> requires that inputs and outputs be encrypted in a manner that only the user agent can perform, and to provide separation between uses by WebAuthn and any uses by the underlying platform. This separation is achieved by hashing the provided PRF inputs with a context string to prevent evaluation of the PRFs for arbitrary inputs.</p>
    <p>The <code>hmac-secret</code> extension provides two PRFs per credential: one which is used for requests where <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⓪">user verification</a> is performed and another for all other requests. This extension only exposes a single PRF per credential and, when implementing on top of <code>hmac-secret</code>, that PRF MUST be the one used for when <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤①">user verification</a> is performed. This overrides the <code class="idl"><a data-link-type="idl" href="#enumdef-userverificationrequirement" id="ref-for-enumdef-userverificationrequirement⑥">UserVerificationRequirement</a></code> if neccessary.</p>
-   <p class="note" role="note"><span class="marker">Note:</span> this extension may be implemented for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④④">authenticators</a> that do not use <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> so long as the behavior observed by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑧">Relying Party</a> is identical.</p>
+   <p class="note" role="note"><span class="marker">Note:</span> this extension may be implemented for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④④">authenticators</a> that do not use <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> so long as the behavior observed by a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑨">Relying Party</a> is identical.</p>
    <dl>
     <dt data-md>Extension identifier
     <dd data-md>
@@ -7074,7 +7081,7 @@ <h4 class="heading settled" data-level="10.1.4" id="prf-extension"><span class="
      </ol>
     <dt data-md>Authenticator extension input / processing / output
     <dd data-md>
-     <p><a data-link-type="dfn" href="#prf" id="ref-for-prf">This extension</a> uses the <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> <code>hmac-secret</code> extension when communicating with the authenticator. It thus does not specify any direct authenticator interaction for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⓪⑨">Relying Parties</a>.</p>
+     <p><a data-link-type="dfn" href="#prf" id="ref-for-prf">This extension</a> uses the <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> <code>hmac-secret</code> extension when communicating with the authenticator. It thus does not specify any direct authenticator interaction for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⓪">Relying Parties</a>.</p>
     <dt data-md>Client extension output
     <dd data-md>
 <pre class="idl highlight def"><c- b>dictionary</c-> <dfn class="dfn-paneled idl-code" data-dfn-type="dictionary" data-export id="dictdef-authenticationextensionsprfoutputs"><code><c- g>AuthenticationExtensionsPRFOutputs</c-></code></dfn> {
@@ -7098,9 +7105,9 @@ <h4 class="heading settled" data-level="10.1.4" id="prf-extension"><span class="
      </div>
    </dl>
    <h4 class="heading settled" data-level="10.1.5" id="sctn-large-blob-extension"><span class="secno">10.1.5. </span><span class="content">Large blob storage extension (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="largeblob">largeBlob</dfn>)</span><a class="self-link" href="#sctn-large-blob-extension"></a></h4>
-   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①①">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①④">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①②">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⓪">Relying Party</a> to store opaque data associated with a credential. Since <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④⑦">authenticators</a> can only store small amounts of data, and most <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①①">Relying Parties</a> are online services that can store arbitrary amounts of state for a user, this is only useful in specific cases. For example, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①②">Relying Party</a> might wish to issue certificates rather than run a centralised authentication service.</p>
-   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①③">Relying Parties</a> can assume that the opaque data will be compressed when being written to a space-limited device and so need not compress it themselves.</p>
-   <p>Since a certificate system needs to sign over the public key of the credential, and that public key is only available after creation, this extension does not add an ability to write blobs in the <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑤">registration</a> context. However, <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①④">Relying Parties</a> SHOULD use the <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑥">registration extension</a> when creating the credential if they wish to later use the <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①③">authentication extension</a>.</p>
+   <p>This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①①">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①④">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①②">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①①">Relying Party</a> to store opaque data associated with a credential. Since <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②④⑦">authenticators</a> can only store small amounts of data, and most <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①②">Relying Parties</a> are online services that can store arbitrary amounts of state for a user, this is only useful in specific cases. For example, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①③">Relying Party</a> might wish to issue certificates rather than run a centralised authentication service.</p>
+   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①④">Relying Parties</a> can assume that the opaque data will be compressed when being written to a space-limited device and so need not compress it themselves.</p>
+   <p>Since a certificate system needs to sign over the public key of the credential, and that public key is only available after creation, this extension does not add an ability to write blobs in the <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑤">registration</a> context. However, <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑤">Relying Parties</a> SHOULD use the <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑥">registration extension</a> when creating the credential if they wish to later use the <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①③">authentication extension</a>.</p>
    <p>Since certificates are sizable relative to the storage capabilities of typical authenticators, user agents SHOULD consider what indications and confirmations are suitable to best guide the user in allocating this limited resource and prevent abuse.</p>
    <p class="note" role="note"><span class="marker">Note:</span> In order to interoperate, user agents storing large blobs on authenticators using <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> are expected to use the provisions detailed in that specification for storing <a data-link-type="dfn" href="https://fidoalliance.org/specs/fido-v2.0-ps-20190130/fido-client-to-authenticator-protocol-v2.0-ps-20190130.html#large-blob" id="ref-for-large-blob">large, per-credential blobs</a>.</p>
    <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②③">Roaming authenticators</a> that use <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a> as their cross-platform transport protocol only support this <a data-link-type="dfn" href="#largeblob" id="ref-for-largeblob">Large Blob</a> extension for <a data-link-type="dfn" href="#discoverable-credential" id="ref-for-discoverable-credential①⑧">discoverable credentials</a>,
@@ -7137,10 +7144,10 @@ <h4 class="heading settled" data-level="10.1.5" id="sctn-large-blob-extension"><
         <p>A DOMString that takes one of the values of <code class="idl"><a data-link-type="idl" href="#enumdef-largeblobsupport" id="ref-for-enumdef-largeblobsupport">LargeBlobSupport</a></code>. (See <a href="#sct-domstring-backwards-compatibility">§ 2.1.1 Enumerations as DOMString types</a>.) Only valid during <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑧">registration</a>.</p>
        <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticationExtensionsLargeBlobInputs" data-dfn-type="dict-member" data-export id="dom-authenticationextensionslargeblobinputs-read"><code>read</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean①⑤">boolean</a></span>
        <dd data-md>
-        <p>A boolean that indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑤">Relying Party</a> would like to fetch the previously-written blob associated with the asserted credential. Only valid during <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑤">authentication</a>.</p>
+        <p>A boolean that indicates that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑥">Relying Party</a> would like to fetch the previously-written blob associated with the asserted credential. Only valid during <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑤">authentication</a>.</p>
        <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticationExtensionsLargeBlobInputs" data-dfn-type="dict-member" data-export id="dom-authenticationextensionslargeblobinputs-write"><code>write</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#BufferSource" id="ref-for-BufferSource①⑤">BufferSource</a></span>
        <dd data-md>
-        <p>An opaque byte string that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑥">Relying Party</a> wishes to store with the existing credential. Only valid during <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑥">authentication</a>.</p>
+        <p>An opaque byte string that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑦">Relying Party</a> wishes to store with the existing credential. Only valid during <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑥">authentication</a>.</p>
       </dl>
      </div>
     <dt data-md>Client extension processing (<a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension①⑨">registration</a>)
@@ -7240,7 +7247,7 @@ <h4 class="heading settled" data-level="10.1.5" id="sctn-large-blob-extension"><
      </div>
     <dt data-md>Authenticator extension processing
     <dd data-md>
-     <p><a data-link-type="dfn" href="#largeblob" id="ref-for-largeblob①">This extension</a> directs the user-agent to cause the large blob to be stored on, or retrieved from, the authenticator. It thus does not specify any direct authenticator interaction for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑦">Relying Parties</a>.</p>
+     <p><a data-link-type="dfn" href="#largeblob" id="ref-for-largeblob①">This extension</a> directs the user-agent to cause the large blob to be stored on, or retrieved from, the authenticator. It thus does not specify any direct authenticator interaction for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑧">Relying Parties</a>.</p>
    </dl>
    <h3 class="heading settled" data-level="10.2" id="sctn-defined-authenticator-extensions"><span class="secno">10.2. </span><span class="content">Authenticator Extensions</span><a class="self-link" href="#sctn-defined-authenticator-extensions"></a></h3>
    <p>This section defines extensions that are both <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①②">client extensions</a> and <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension①②">authenticator extensions</a>.</p>
@@ -7255,7 +7262,7 @@ <h4 class="heading settled" data-level="10.2.1" id="sctn-uvm-extension"><span cl
      <p><a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②①">Registration</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑧">Authentication</a></p>
     <dt data-md>Client extension input
     <dd data-md>
-     <p>The Boolean value <code>true</code> to indicate that this extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑧">Relying Party</a>.</p>
+     <p>The Boolean value <code>true</code> to indicate that this extension is requested by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑨">Relying Party</a>.</p>
 <pre class="idl highlight def"><c- b>partial</c-> <c- b>dictionary</c-> <a class="idl-code" data-link-type="dictionary" href="#dictdef-authenticationextensionsclientinputs" id="ref-for-dictdef-authenticationextensionsclientinputs①①"><c- g>AuthenticationExtensionsClientInputs</c-></a> {
   <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean②⓪"><c- b>boolean</c-></a> <dfn class="idl-code" data-dfn-for="AuthenticationExtensionsClientInputs" data-dfn-type="dict-member" data-export data-type="boolean " id="dom-authenticationextensionsclientinputs-uvm"><code><c- g>uvm</c-></code><a class="self-link" href="#dom-authenticationextensionsclientinputs-uvm"></a></dfn>;
 };
@@ -7335,19 +7342,19 @@ <h4 class="heading settled" data-level="10.2.1" id="sctn-uvm-extension"><span cl
 </pre>
    </dl>
    <h4 class="heading settled" data-level="10.2.2" id="sctn-device-publickey-extension"><span class="secno">10.2.2. </span><span class="content">Device-bound public key extension (<dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="devicepubkey">devicePubKey</dfn>)</span><a class="self-link" href="#sctn-device-publickey-extension"></a></h4>
-   <p>This <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension①③">authenticator</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②②">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑨">authentication extension</a> provides a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③①⑨">Relying Party</a> with a "device continuity" signal for <a data-link-type="dfn" href="#backup-eligible" id="ref-for-backup-eligible②">backup eligible</a> credentials. This is done by creating a <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential①">user credential</a>-specific <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair②">hardware-bound device key pair</a> on the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤②">authenticator</a>, if such a key pair does not already exist for the <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential②">user credential</a> being created or exercised, and returning the <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key">device public key</a> along with a signature by the <a data-link-type="dfn" href="#device-private-key" id="ref-for-device-private-key①">device private key</a> to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⓪">Relying Party</a>. This is done each time this <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey③">devicePubKey</a> extension is included with either a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑦">navigator.credentials.create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⑨">navigator.credentials.get()</a></code> call.</p>
+   <p>This <a data-link-type="dfn" href="#authenticator-extension" id="ref-for-authenticator-extension①③">authenticator</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②②">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension①⑨">authentication extension</a> provides a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⓪">Relying Party</a> with a "device continuity" signal for <a data-link-type="dfn" href="#backup-eligible" id="ref-for-backup-eligible②">backup eligible</a> credentials. This is done by creating a <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential①">user credential</a>-specific <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair②">hardware-bound device key pair</a> on the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤②">authenticator</a>, if such a key pair does not already exist for the <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential②">user credential</a> being created or exercised, and returning the <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key">device public key</a> along with a signature by the <a data-link-type="dfn" href="#device-private-key" id="ref-for-device-private-key①">device private key</a> to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②①">Relying Party</a>. This is done each time this <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey③">devicePubKey</a> extension is included with either a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑦">navigator.credentials.create()</a></code> or <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get③⑨">navigator.credentials.get()</a></code> call.</p>
    <p>If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤③">authenticator</a> is incapable of generating a <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair③">hardware-bound device key pair</a>, or the registration or authentication operation fails for any reason, this extension is ignored and no <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair④">hardware-bound device key pair</a> is created. In this case, there is no <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey④">devicePubKey</a> extension output generated.</p>
    <p>The <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair⑤">hardware-bound device key pair</a> is not on its own a <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential③">user credential</a> and does not have its own <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④①">credential ID</a>. Instead, the returned <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key①">device public key</a> is a device-specific contextual attribute of its associated <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential④">user credential</a>. That is, when that <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑤">user credential</a> is used—along with the <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey⑤">devicePubKey</a> extension—on a particular <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤④">authenticator</a>, a particular <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key②">device public key</a> is returned by the extension, along with a signature demonstrating proof-of-possession of the <a data-link-type="dfn" href="#device-private-key" id="ref-for-device-private-key②">device private key</a> by that device.</p>
    <h5 class="heading settled" data-level="10.2.2.1" id="sctn-device-publickey-extension-usage"><span class="secno">10.2.2.1. </span><span class="content">Relying Party Usage</span><a class="self-link" href="#sctn-device-publickey-extension-usage"></a></h5>
-   <p>This extension is intended for use by those <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②①">Relying Parties</a> employing risk-analysis systems informing their sign-in decisions. This extension provides a "device continuity" signal <i>when used consistently</i> with both <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑧">navigator.credentials.create()</a></code> and <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④⓪">navigator.credentials.get()</a></code> operations:</p>
-   <p>When a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②②">Relying Party</a> uses the <code>devicePubKey</code> extension with a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑨">create()</a></code> call to create a new <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑥">user credential</a>, a signature by a new <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①">device-bound key</a> ("dpk 1") is returned along with the new <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key③">device public key</a>. Even if the <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑦">user credential</a> is <a data-link-type="dfn" href="#backed-up" id="ref-for-backed-up⑤">backed up</a>, "dpk 1" never leaves the <a data-link-type="dfn" href="#generating-authenticator" id="ref-for-generating-authenticator⑤">generating authenticator</a> ("authenticator 1"). The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②③">Relying Party</a>'s subsequent <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④①">get()</a></code> operations using the same user credential with that <i>same <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑤">authenticator</a></i> generate <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①②">assertions</a> including further signatures by the <i>same</i> <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key②">device-bound key</a> ("dpk 1"). This behavior on "authenticator 1" is independent of whether this user credential has been copied to any other <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑥">authenticator</a>.</p>
-   <p>Then, if this same user credential is copied to a different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑦">authenticator</a> ("authenticator 2"), the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②④">Relying Party</a>'s first <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④②">get()</a></code> call on "authenticator 2" (that includes the <code>devicePubKey</code> extension) will produce an <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①③">assertion</a> including a signature by a <i>new</i> <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key③">device-bound key</a> ("dpk 2"). Note that such a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑦">multi-device credential</a> can be exercised on "authenticator 2" without a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create④⓪">create()</a></code> having been performed on "authenticator 2". The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑤">Relying Party</a>'s subsequent <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④③">get()</a></code> calls on "authenticator 2", using the <code>devicePubKey</code> extension and the same user credential, yield further signatures by "dpk 2".</p>
+   <p>This extension is intended for use by those <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②②">Relying Parties</a> employing risk-analysis systems informing their sign-in decisions. This extension provides a "device continuity" signal <i>when used consistently</i> with both <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑧">navigator.credentials.create()</a></code> and <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④⓪">navigator.credentials.get()</a></code> operations:</p>
+   <p>When a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②③">Relying Party</a> uses the <code>devicePubKey</code> extension with a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create③⑨">create()</a></code> call to create a new <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑥">user credential</a>, a signature by a new <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①">device-bound key</a> ("dpk 1") is returned along with the new <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key③">device public key</a>. Even if the <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑦">user credential</a> is <a data-link-type="dfn" href="#backed-up" id="ref-for-backed-up⑤">backed up</a>, "dpk 1" never leaves the <a data-link-type="dfn" href="#generating-authenticator" id="ref-for-generating-authenticator⑤">generating authenticator</a> ("authenticator 1"). The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②④">Relying Party</a>'s subsequent <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④①">get()</a></code> operations using the same user credential with that <i>same <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑤">authenticator</a></i> generate <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①②">assertions</a> including further signatures by the <i>same</i> <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key②">device-bound key</a> ("dpk 1"). This behavior on "authenticator 1" is independent of whether this user credential has been copied to any other <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑥">authenticator</a>.</p>
+   <p>Then, if this same user credential is copied to a different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑦">authenticator</a> ("authenticator 2"), the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑤">Relying Party</a>'s first <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④②">get()</a></code> call on "authenticator 2" (that includes the <code>devicePubKey</code> extension) will produce an <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①③">assertion</a> including a signature by a <i>new</i> <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key③">device-bound key</a> ("dpk 2"). Note that such a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑦">multi-device credential</a> can be exercised on "authenticator 2" without a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create④⓪">create()</a></code> having been performed on "authenticator 2". The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑥">Relying Party</a>'s subsequent <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④③">get()</a></code> calls on "authenticator 2", using the <code>devicePubKey</code> extension and the same user credential, yield further signatures by "dpk 2".</p>
    <p>A usage example is thus:</p>
    <blockquote>
-    <p>Say that a sign-in request appears at a website along with some geolocation signal that has not been seen for this <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑤">user account</a> before, and is outside of the typical usage hours observed for the account. The risk may be deemed high enough not to allow the request, even with an assertion by a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑧">multi-device credential</a> on its own. But if a signature by a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key④">device-bound key</a> that is <i>well established</i> for this user can also be presented, then that may tip the balance.</p>
+    <p>Say that a sign-in request appears at a website along with some geolocation signal that has not been seen for this <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑥">user account</a> before, and is outside of the typical usage hours observed for the account. The risk may be deemed high enough not to allow the request, even with an assertion by a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential⑧">multi-device credential</a> on its own. But if a signature by a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key④">device-bound key</a> that is <i>well established</i> for this user can also be presented, then that may tip the balance.</p>
    </blockquote>
-   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑥">Relying Parties</a> need to take care to verify <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key⑤">device-bound key</a> signatures before associating and storing extension output value fields in conjunction with the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑥">user account</a>. See <a href="#sctn-device-publickey-extension-verification">§ 10.2.2.3 devicePubKey Extension Output Verification Procedures</a>.</p>
-   <p>The weight that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑦">Relying Parties</a> give to the presence of a signature from a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key⑥">device-bound key</a> may be based on information learned from its optional attestation. An attestation can indicate the level of protection that the hardware offers the private key, certifications for the hardware, etc.</p>
+   <p class="note" role="note"><span class="marker">Note:</span> <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑦">Relying Parties</a> need to take care to verify <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key⑤">device-bound key</a> signatures before associating and storing extension output value fields in conjunction with the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑦">user account</a>. See <a href="#sctn-device-publickey-extension-verification">§ 10.2.2.3 devicePubKey Extension Output Verification Procedures</a>.</p>
+   <p>The weight that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑧">Relying Parties</a> give to the presence of a signature from a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key⑥">device-bound key</a> may be based on information learned from its optional attestation. An attestation can indicate the level of protection that the hardware offers the private key, certifications for the hardware, etc.</p>
    <h5 class="heading settled" data-level="10.2.2.2" id="sctn-device-publickey-extension-definition"><span class="secno">10.2.2.2. </span><span class="content">Extension Definition</span><a class="self-link" href="#sctn-device-publickey-extension-definition"></a></h5>
    <dl>
     <dt data-md>Extension identifier
@@ -7371,12 +7378,12 @@ <h5 class="heading settled" data-level="10.2.2.2" id="sctn-device-publickey-exte
       <dl>
        <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticationExtensionsDevicePublicKeyInputs" data-dfn-type="dict-member" data-export id="dom-authenticationextensionsdevicepublickeyinputs-attestation"><code>attestation</code></dfn>, <span> of type <a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑦⑥">DOMString</a>, defaulting to <code>"none"</code></span>
        <dd data-md>
-        <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑧">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance⑤">attestation conveyance</a>.
+        <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑨">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding <a data-link-type="dfn" href="#attestation-conveyance" id="ref-for-attestation-conveyance⑤">attestation conveyance</a>.
 Its value SHOULD be a member of <code class="idl"><a data-link-type="idl" href="#enumdef-attestationconveyancepreference" id="ref-for-enumdef-attestationconveyancepreference⑤">AttestationConveyancePreference</a></code>. <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑤">Client platforms</a> MUST ignore unknown values, treating an unknown value as if the <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#map-exists" id="ref-for-map-exists⑧">member does not exist</a>.</p>
         <p>The default value is <code class="idl"><a data-link-type="idl" href="#dom-attestationconveyancepreference-none" id="ref-for-dom-attestationconveyancepreference-none⑦">none</a></code>.</p>
        <dt data-md><dfn class="dfn-paneled idl-code" data-dfn-for="AuthenticationExtensionsDevicePublicKeyInputs" data-dfn-type="dict-member" data-export id="dom-authenticationextensionsdevicepublickeyinputs-attestationformats"><code>attestationFormats</code></dfn>, <span> of type sequence&lt;<a data-link-type="idl-name" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑦⑦">DOMString</a>>, defaulting to <code>[]</code></span>
        <dd data-md>
-        <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③②⑨">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding the <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②⑤">attestation</a> statement format used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑧">authenticator</a>.
+        <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⓪">Relying Party</a> MAY use this OPTIONAL member to specify a preference regarding the <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②⑤">attestation</a> statement format used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑧">authenticator</a>.
 Values SHOULD be taken from the IANA "WebAuthn Attestation Statement Format Identifiers" registry <a data-link-type="biblio" href="#biblio-iana-webauthn-registries" title="Web Authentication (WebAuthn) registries">[IANA-WebAuthn-Registries]</a> established by <a data-link-type="biblio" href="#biblio-rfc8809" title="Registries for Web Authentication (WebAuthn)">[RFC8809]</a>.
 Values are ordered from most preferable to least preferable.
 This parameter is advisory and the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑤⑨">authenticator</a> MAY use an attestation statement not enumerated in this parameter.</p>
@@ -7505,7 +7512,7 @@ <h5 class="heading settled" data-level="10.2.2.2" id="sctn-device-publickey-exte
          <p><var>attFormat</var> is an <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format②⑤">attestation statement format</a> appropriate for this <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥①">authenticator</a> based on <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyinputs-attestationformats" id="ref-for-dom-authenticationextensionsdevicepublickeyinputs-attestationformats①">attestationFormats</a></code>, and <var>attAaguid</var> is the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥②">authenticator’s</a> <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid①⓪">AAGUID</a>. (Since the <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair⑦">hardware-bound device key pair</a> is specific to a particular authenticator, its attestation can be tied to hardware roots of trust, although they do not have to be. This is in contrast to the associated <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential⑨">user credential</a>'s attestation, if it is a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential①⓪">multi-device credential</a>.)</p>
         <dt data-md>enterprise
         <dd data-md>
-         <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⓪">Relying Party</a> wants to receive an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④②">attestation statement</a> that may include uniquely identifying information. This is intended for controlled deployments within an enterprise where the organization wishes to tie registrations to specific authenticators. <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥③">Authenticators</a> MUST NOT provide such an attestation unless the user agent or authenticator configuration expressly permits it for the requested <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④⑧">RP ID</a>. If <i>not</i> permitted, then <var>attFormat</var> is "none" and <var>attAaguid</var> is 16 zero bytes. Otherwise <var>attFormat</var> is an <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format②⑥">attestation statement format</a> appropriate for this <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥④">authenticator</a> based on <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyinputs-attestationformats" id="ref-for-dom-authenticationextensionsdevicepublickeyinputs-attestationformats②">attestationFormats</a></code>, and <var>attAaguid</var> is the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑤">authenticator’s</a> <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid①①">AAGUID</a>. (Again, since the <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair⑧">hardware-bound device key pair</a> is specific to a particular authenticator, the attestation may be tied to hardware roots of trust.)</p>
+         <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③①">Relying Party</a> wants to receive an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④②">attestation statement</a> that may include uniquely identifying information. This is intended for controlled deployments within an enterprise where the organization wishes to tie registrations to specific authenticators. <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥③">Authenticators</a> MUST NOT provide such an attestation unless the user agent or authenticator configuration expressly permits it for the requested <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id④⑧">RP ID</a>. If <i>not</i> permitted, then <var>attFormat</var> is "none" and <var>attAaguid</var> is 16 zero bytes. Otherwise <var>attFormat</var> is an <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format②⑥">attestation statement format</a> appropriate for this <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥④">authenticator</a> based on <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyinputs-attestationformats" id="ref-for-dom-authenticationextensionsdevicepublickeyinputs-attestationformats②">attestationFormats</a></code>, and <var>attAaguid</var> is the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑤">authenticator’s</a> <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid①①">AAGUID</a>. (Again, since the <a data-link-type="dfn" href="#hardware-bound-device-key-pair" id="ref-for-hardware-bound-device-key-pair⑧">hardware-bound device key pair</a> is specific to a particular authenticator, the attestation may be tied to hardware roots of trust.)</p>
          <p class="note" role="note"><span class="marker">Note:</span> CTAP2 does not currently provide for an <a href="https://fidoalliance.org/specs/fido-v2.1-ps-20210615/fido-client-to-authenticator-protocol-v2.1-ps-20210615.html#makecred-enterpriseattestation">enterpriseAttestation</a> signal during an <a href="https://fidoalliance.org/specs/fido-v2.1-ps-20210615/fido-client-to-authenticator-protocol-v2.1-ps-20210615.html#authenticatorGetAssertion">authenticatorGetAssertion</a> call. Until that is changed, <a href="https://fidoalliance.org/specs/fido-v2.1-ps-20210615/fido-client-to-authenticator-protocol-v2.1-ps-20210615.html#platform-managed-enterprise-attestation">platform-managed enterprise attestation</a> will not work in that context with CTAP2 <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑥">authenticators</a>.</p>
        </dl>
       <li data-md>
@@ -7535,7 +7542,7 @@ <h5 class="heading settled" data-level="10.2.2.2" id="sctn-device-publickey-exte
        </ol>
       <li data-md>
        <p>Let <var>dpkSig</var> be the result of signing the <a data-link-type="dfn" href="#assertion-signature" id="ref-for-assertion-signature①⓪">assertion signature</a> <a href="#fig-signature">input</a> with <var>devicePrivateKey</var>.</p>
-       <p class="note" role="note"><span class="marker">Note:</span> the <a data-link-type="dfn" href="#assertion-signature" id="ref-for-assertion-signature①①">assertion signature</a> <a href="#fig-signature">input</a>, and thus <var>dpkSig</var>, covers the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③①">Relying Party</a>'s <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-challenge" id="ref-for-dom-publickeycredentialcreationoptions-challenge③">challenge</a></code> because it includes the <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data②①">hash of the serialized client data</a>. Thus the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③②">Relying Party</a> knows that <var>dpkSig</var> is a fresh signature.</p>
+       <p class="note" role="note"><span class="marker">Note:</span> the <a data-link-type="dfn" href="#assertion-signature" id="ref-for-assertion-signature①①">assertion signature</a> <a href="#fig-signature">input</a>, and thus <var>dpkSig</var>, covers the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③②">Relying Party</a>'s <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-challenge" id="ref-for-dom-publickeycredentialcreationoptions-challenge③">challenge</a></code> because it includes the <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data②①">hash of the serialized client data</a>. Thus the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③③">Relying Party</a> knows that <var>dpkSig</var> is a fresh signature.</p>
       <li data-md>
        <p>Output <var>dpkSig</var> as the extension’s <a data-link-type="dfn" href="#unsigned-extension-outputs" id="ref-for-unsigned-extension-outputs⑦">unsigned extension output</a>.</p>
        <p class="note" role="note"><span class="marker">Note:</span> <var>dpkSig</var> cannot be included in the <a data-link-type="dfn" href="#authenticator-extension-output" id="ref-for-authenticator-extension-output①⑧">authenticator extension output</a> because it is returned inside the <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data⑤⑦">authenticator data</a> and that would imply that the signature signs over itself.</p>
@@ -7544,7 +7551,7 @@ <h5 class="heading settled" data-level="10.2.2.2" id="sctn-device-publickey-exte
    <h6 class="heading settled" data-level="10.2.2.2.1" id="sctn-device-publickey-attestation-aaguid"><span class="secno">10.2.2.2.1. </span><span class="content">AAGUIDs</span><a class="self-link" href="#sctn-device-publickey-attestation-aaguid"></a></h6>
    <p>The <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid①②">AAGUID</a> included in the <code><a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey⑥">devicePubKey</a></code> extension output, if non-zero, identifies the make or model of hardware that is storing the <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key⑨">device-bound key</a>. This is distinct from the <a data-link-type="dfn" href="#authdata-attestedcredentialdata-aaguid" id="ref-for-authdata-attestedcredentialdata-aaguid①③">AAGUID</a> in the <a data-link-type="dfn" href="#attested-credential-data" id="ref-for-attested-credential-data①⑧">attested credential data</a> of a <a data-link-type="dfn" href="#multi-device-credential" id="ref-for-multi-device-credential①②">multi-device credential</a>, which likely identifies something broader since such credentials are not bound to a single device. Thus the two AAGUIDs MAY be different in a single response and either, or both, may be zero depending on the options requested and authenticator behaviour.</p>
    <h6 class="heading settled" data-level="10.2.2.2.2" id="sctn-device-publickey-attestation-calculations"><span class="secno">10.2.2.2.2. </span><span class="content">Attestation calculations</span><a class="self-link" href="#sctn-device-publickey-attestation-calculations"></a></h6>
-   <p>When computing attestations, the process in <a href="#sctn-generating-an-attestation-object">§ 6.5.5 Generating an Attestation Object</a> takes two inputs: <code>authData</code> and <code>hash</code>. When calculating an attestation for a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①⓪">device-bound key</a>, the typical value for <code>hash</code> hashes over the attestation signature itself, which is impossible. Also the attestation of a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①①">device-bound key</a> is potentially used repeatedly, thus may want to be cached. But signing over values that include <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③③">Relying Party</a>-chosen nonces, like the <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data②②">hash of the serialized client data</a>, makes that impossible.</p>
+   <p>When computing attestations, the process in <a href="#sctn-generating-an-attestation-object">§ 6.5.5 Generating an Attestation Object</a> takes two inputs: <code>authData</code> and <code>hash</code>. When calculating an attestation for a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①⓪">device-bound key</a>, the typical value for <code>hash</code> hashes over the attestation signature itself, which is impossible. Also the attestation of a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①①">device-bound key</a> is potentially used repeatedly, thus may want to be cached. But signing over values that include <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③④">Relying Party</a>-chosen nonces, like the <a data-link-type="dfn" href="#collectedclientdata-hash-of-the-serialized-client-data" id="ref-for-collectedclientdata-hash-of-the-serialized-client-data②②">hash of the serialized client data</a>, makes that impossible.</p>
    <p>Therefore when calculating an attestation for a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①②">device-bound key</a>, the inputs are:</p>
    <ul>
     <li data-md>
@@ -7555,7 +7562,7 @@ <h6 class="heading settled" data-level="10.2.2.2.2" id="sctn-device-publickey-at
    <p>The attestation signature is thus typically calculated over the bytes of <code>(h’64657669636520626f756e64206b6579206174746573746174696f6e2073696700ffffffff' || <var>aaguid</var> || <var>dpk</var> || <var>nonce</var>)</code>. The 37-byte prefix ensures domain separation: it takes the place of the RP ID hash, flags, and signature counter fields in those messages and ensures that no attestation signature for a <a data-link-type="dfn" href="#device-bound-key" id="ref-for-device-bound-key①③">device-bound key</a> can be confused with a signature for a <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential①②">user credential</a>.</p>
    <p>Note that when <var>nonce</var> is empty, then the (signed) authenticator extension output MAY be constant. However, the (unsigned) <var>dpkSig</var> output is always unique and prevents replay of the (signed) extension output without knowledge of the <a data-link-type="dfn" href="#device-private-key" id="ref-for-device-private-key④">device private key</a>.</p>
    <h5 class="heading settled" data-level="10.2.2.3" id="sctn-device-publickey-extension-verification"><span class="secno">10.2.2.3. </span><span class="content"><code>devicePubKey</code> Extension Output Verification Procedures</span><a class="self-link" href="#sctn-device-publickey-extension-verification"></a></h5>
-   <p>Verifying the <code><a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey⑦">devicePubKey</a></code> extension output is performed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③④">Relying Party</a> whenever a <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key⑥">device public key</a> is returned within the extension output.</p>
+   <p>Verifying the <code><a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey⑦">devicePubKey</a></code> extension output is performed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑤">Relying Party</a> whenever a <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key⑥">device public key</a> is returned within the extension output.</p>
    <p>The <a data-link-type="dfn" href="#devicepubkey" id="ref-for-devicepubkey⑧">devicePubKey</a> extension adds the following <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct-item" id="ref-for-struct-item①②">item</a> to <a data-link-type="dfn" href="#credential-record" id="ref-for-credential-record①③">credential records</a>:</p>
    <dl>
     <dt data-md><dfn class="dfn-paneled" data-dfn-for="credential record" data-dfn-type="abstract-op" data-export id="abstract-opdef-credential-record-devicepubkeys">devicePubKeys</dfn>
@@ -7583,8 +7590,8 @@ <h5 class="heading settled" data-level="10.2.2.3" id="sctn-device-publickey-exte
      </dl>
    </dl>
    <h6 class="heading settled" data-level="10.2.2.3.1" id="sctn-device-publickey-extension-verification-create"><span class="secno">10.2.2.3.1. </span><span class="content">Registration (<code>create()</code>)</span><a class="self-link" href="#sctn-device-publickey-extension-verification-create"></a></h6>
-   <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑤">Relying Party</a> requested the <code>devicePubKey</code> extension in a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create④①">navigator.credentials.create()</a></code> call,
-then the below verification steps are performed in the context of <a href="#reg-ceremony-verify-extension-outputs">step 19</a> of <a href="#sctn-registering-a-new-credential">§ 7.1 Registering a New Credential</a> using these variables established therein: <var>credential</var>, <var>clientExtensionResults</var>, <var>authData</var>, and <var>hash</var>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑥">Relying Party</a> policy may specify whether a response without a <code>devicePubKey</code> extension output is acceptable.</p>
+   <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑥">Relying Party</a> requested the <code>devicePubKey</code> extension in a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-create" id="ref-for-dom-credentialscontainer-create④①">navigator.credentials.create()</a></code> call,
+then the below verification steps are performed in the context of <a href="#reg-ceremony-verify-extension-outputs">step 19</a> of <a href="#sctn-registering-a-new-credential">§ 7.1 Registering a New Credential</a> using these variables established therein: <var>credential</var>, <var>clientExtensionResults</var>, <var>authData</var>, and <var>hash</var>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑦">Relying Party</a> policy may specify whether a response without a <code>devicePubKey</code> extension output is acceptable.</p>
    <ol>
     <li data-md>
      <p>Verify that <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsclientoutputs-devicepubkey" id="ref-for-dom-authenticationextensionsclientoutputs-devicepubkey">devicePubKey</a></code> member of <var>clientExtensionResults</var> exists, and contains the <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyoutputs-signature" id="ref-for-dom-authenticationextensionsdevicepublickeyoutputs-signature">signature</a></code> field.</p>
@@ -7596,7 +7603,7 @@ <h6 class="heading settled" data-level="10.2.2.3.1" id="sctn-device-publickey-ex
     <li data-md>
      <p>Verify that <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyoutputs-signature" id="ref-for-dom-authenticationextensionsdevicepublickeyoutputs-signature①">signature</a></code> is a valid signature over the <a data-link-type="dfn" href="#assertion-signature" id="ref-for-assertion-signature①②">assertion signature</a> <a href="#fig-signature">input</a> (i.e. <code>authData</code> and <code>hash</code>) by the <a data-link-type="dfn" href="#device-public-key" id="ref-for-device-public-key⑦">device public key</a> <var>dpk</var>. (The signature algorithm is the same as for the <a data-link-type="dfn" href="#user-credential" id="ref-for-user-credential①③">user credential</a>.)</p>
     <li data-md>
-     <p>Optionally, if attestation was requested and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑦">Relying Party</a> wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑦">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature①⑧">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format②⑨">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①④">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑧">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
+     <p>Optionally, if attestation was requested and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑧">Relying Party</a> wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑦">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature①⑧">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format②⑨">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①④">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑨">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
      <p class="note" role="note"><span class="marker">Note:</span> If <var>fmt</var>’s value is "<a data-link-type="dfn" href="#none" id="ref-for-none⑧">none</a>" there is no attestation signature to verify.</p>
     <li data-md>
      <p>Create a new <a data-link-type="dfn" href="#credential-record-device-bound-key-record" id="ref-for-credential-record-device-bound-key-record①">device-bound key record</a> with the contents:</p>
@@ -7622,8 +7629,8 @@ <h6 class="heading settled" data-level="10.2.2.3.1" id="sctn-device-publickey-ex
    </ol>
    <p>See also <a href="#sctn-device-publickey-extension-usage">§ 10.2.2.1 Relying Party Usage</a> for further details.</p>
    <h6 class="heading settled" data-level="10.2.2.3.2" id="sctn-device-publickey-extension-verification-get"><span class="secno">10.2.2.3.2. </span><span class="content">Authentication (<code>get()</code>)</span><a class="self-link" href="#sctn-device-publickey-extension-verification-get"></a></h6>
-   <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③③⑨">Relying Party</a> requested the <code>devicePubKey</code> extension in a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④⑤">navigator.credentials.get()</a></code> call,
-then the below verification steps are performed in the context of <a href="#authn-ceremony-verify-extension-outputs">step 17</a> of <a href="#sctn-verifying-assertion">§ 7.2 Verifying an Authentication Assertion</a> using these variables established therein: <var>credential</var>, <var>clientExtensionResults</var>, <var>authData</var>, <var>hash</var>, and <var>credentialRecord</var>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⓪">Relying Party</a> policy may specify whether a response without a <code>devicePubKey</code> extension output is acceptable.</p>
+   <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⓪">Relying Party</a> requested the <code>devicePubKey</code> extension in a <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④⑤">navigator.credentials.get()</a></code> call,
+then the below verification steps are performed in the context of <a href="#authn-ceremony-verify-extension-outputs">step 17</a> of <a href="#sctn-verifying-assertion">§ 7.2 Verifying an Authentication Assertion</a> using these variables established therein: <var>credential</var>, <var>clientExtensionResults</var>, <var>authData</var>, <var>hash</var>, and <var>credentialRecord</var>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④①">Relying Party</a> policy may specify whether a response without a <code>devicePubKey</code> extension output is acceptable.</p>
    <ol>
     <li data-md>
      <p>Verify that <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsclientoutputs-devicepubkey" id="ref-for-dom-authenticationextensionsclientoutputs-devicepubkey①">devicePubKey</a></code> member of <var>clientExtensionResults</var> exists, and contains the <code class="idl"><a data-link-type="idl" href="#dom-authenticationextensionsdevicepublickeyoutputs-signature" id="ref-for-dom-authenticationextensionsdevicepublickeyoutputs-signature②">signature</a></code> field.</p>
@@ -7663,7 +7670,7 @@ <h6 class="heading settled" data-level="10.2.2.3.2" id="sctn-device-publickey-ex
          <p class="note" role="note"><span class="marker">Note:</span> This authenticator is not generating a fresh per-response random nonce.</p>
         <dt data-md>does not equal <var>dpkRecord</var>.<a data-link-type="abstract-op" href="#abstract-opdef-devicepubkey-record-attstmt" id="ref-for-abstract-opdef-devicepubkey-record-attstmt②">attStmt</a> by binary equality:
         <dd data-md>
-         <p>Optionally, if attestation was requested and the RP wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑧">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature①⑨">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format③⓪">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①⑤">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④①">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
+         <p>Optionally, if attestation was requested and the RP wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑧">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature①⑨">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format③⓪">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①⑤">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④②">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
          <p>If the result is:</p>
          <dl class="switch">
           <dt data-md>successful
@@ -7693,10 +7700,10 @@ <h6 class="heading settled" data-level="10.2.2.3.2" id="sctn-device-publickey-ex
          <dl class="switch">
           <dt data-md>If <var>fmt</var>’s value is "none":
           <dd data-md>
-           <p>There is no attestation signature to verify and this is a new device. Unless <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④②">Relying Party</a> policy specifies that this attestation is unacceptable, <a data-link-type="abstract-op" href="#abstract-opdef-create-a-new-device-bound-key-record" id="ref-for-abstract-opdef-create-a-new-device-bound-key-record">Create a new device-bound key record</a> and then terminate these verification steps.</p>
+           <p>There is no attestation signature to verify and this is a new device. Unless <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④③">Relying Party</a> policy specifies that this attestation is unacceptable, <a data-link-type="abstract-op" href="#abstract-opdef-create-a-new-device-bound-key-record" id="ref-for-abstract-opdef-create-a-new-device-bound-key-record">Create a new device-bound key record</a> and then terminate these verification steps.</p>
           <dt data-md>Otherwise:
           <dd data-md>
-           <p>Optionally, if attestation was requested and the RP wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑨">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature②⓪">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format③①">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①⑥">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④③">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
+           <p>Optionally, if attestation was requested and the RP wishes to verify it, verify that <var>attStmt</var> is a correct <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement④⑨">attestation statement</a>, conveying a valid <a data-link-type="dfn" href="#attestation-signature" id="ref-for-attestation-signature②⓪">attestation signature</a>, by using the <a data-link-type="dfn" href="#attestation-statement-format" id="ref-for-attestation-statement-format③①">attestation statement format</a> <var>fmt</var>’s <a data-link-type="dfn" href="#verification-procedure" id="ref-for-verification-procedure①⑥">verification procedure</a> given <var>attStmt</var>. See <a href="#sctn-device-publickey-attestation-calculations">§ 10.2.2.2.2 Attestation calculations</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④④">Relying Party</a> policy may specifiy which attestations are acceptable.</p>
            <p>If the result is:</p>
            <dl class="switch">
             <dt data-md>successful
@@ -7708,7 +7715,7 @@ <h6 class="heading settled" data-level="10.2.2.3.2" id="sctn-device-publickey-ex
            </dl>
          </dl>
         <li data-md>
-         <p>Otherwise there is some form of error: we recieved a known <var>dpk</var> value, but one or more of the accompanying <var>aaguid</var> or <var>scope</var> values did not match what the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④④">Relying Party</a> has stored along with that <var>dpk</var> value. Terminate these verification steps.</p>
+         <p>Otherwise there is some form of error: we recieved a known <var>dpk</var> value, but one or more of the accompanying <var>aaguid</var> or <var>scope</var> values did not match what the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑤">Relying Party</a> has stored along with that <var>dpk</var> value. Terminate these verification steps.</p>
        </ol>
      </dl>
    </ol>
@@ -8341,13 +8348,13 @@ <h3 class="heading settled" data-level="12.4" id="sctn-extensions-reg"><span cla
      <p>WebAuthn Extension Identifier: credProps</p>
     <li data-md>
      <p>Description: This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①③">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②⑤">registration extension</a> enables reporting of a newly-created <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②①">credential</a>'s properties,
-as determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⓪">client</a>, to the calling <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④④">WebAuthn Relying Party</a>'s <a data-link-type="dfn" href="#web-application" id="ref-for-web-application⑤">web application</a>.</p>
+as determined by the <a data-link-type="dfn" href="#client" id="ref-for-client⑨①">client</a>, to the calling <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④④">WebAuthn Relying Party</a>'s <a data-link-type="dfn" href="#web-application" id="ref-for-web-application⑤">web application</a>.</p>
     <li data-md>
      <p>Specification Document: Section <a href="#sctn-authenticator-credential-properties-extension">§ 10.1.3 Credential Properties Extension (credProps)</a> of this specification <br><br></p>
     <li data-md>
      <p>WebAuthn Extension Identifier: largeBlob</p>
     <li data-md>
-     <p>Description: This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①④">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②⑥">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension②③">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑤">Relying Party</a> to store opaque data associated with a credential.</p>
+     <p>Description: This <a data-link-type="dfn" href="#client-extension" id="ref-for-client-extension①④">client</a> <a data-link-type="dfn" href="#registration-extension" id="ref-for-registration-extension②⑥">registration extension</a> and <a data-link-type="dfn" href="#authentication-extension" id="ref-for-authentication-extension②③">authentication extension</a> allows a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑥">Relying Party</a> to store opaque data associated with a credential.</p>
     <li data-md>
      <p>Specification Document: Section <a href="#sctn-large-blob-extension">§ 10.1.5 Large blob storage extension (largeBlob)</a> of this specification</p>
    </ul>
@@ -8355,39 +8362,39 @@ <h2 class="heading settled" data-level="13" id="sctn-security-considerations"><s
    <p>This specification defines a <a href="#sctn-api">Web API</a> and a cryptographic peer-entity authentication protocol.
 The <a data-link-type="dfn" href="#web-authentication-api" id="ref-for-web-authentication-api①⑥">Web Authentication API</a> allows Web developers (i.e., "authors") to utilize the Web Authentication protocol in their <a data-link-type="dfn" href="#registration" id="ref-for-registration②②">registration</a> and <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑤">authentication</a> <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①③">ceremonies</a>.
 The entities comprising the Web Authentication protocol endpoints are user-controlled <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator⑧">WebAuthn Authenticators</a> and a <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④⑤">WebAuthn Relying Party</a>'s
-computing environment hosting the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑥">Relying Party</a>'s <a data-link-type="dfn" href="#web-application" id="ref-for-web-application⑥">web application</a>.
-In this model, the user agent, together with the <a data-link-type="dfn" href="#webauthn-client" id="ref-for-webauthn-client⑦">WebAuthn Client</a>, comprise an intermediary between <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑧">authenticators</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑦">Relying Parties</a>.
-Additionally, <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑨">authenticators</a> can <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②⑦">attest</a> to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑧">Relying Parties</a> as to their provenance.</p>
+computing environment hosting the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑦">Relying Party</a>'s <a data-link-type="dfn" href="#web-application" id="ref-for-web-application⑥">web application</a>.
+In this model, the user agent, together with the <a data-link-type="dfn" href="#webauthn-client" id="ref-for-webauthn-client⑦">WebAuthn Client</a>, comprise an intermediary between <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑧">authenticators</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑧">Relying Parties</a>.
+Additionally, <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑥⑨">authenticators</a> can <a data-link-type="dfn" href="#attestation" id="ref-for-attestation②⑦">attest</a> to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑨">Relying Parties</a> as to their provenance.</p>
    <p>At this time, this specification does not feature detailed security considerations. However, the <a data-link-type="biblio" href="#biblio-fidosecref" title="FIDO Security Reference">[FIDOSecRef]</a> document provides a security analysis which is overall applicable to this specification.
 Also, the <a data-link-type="biblio" href="#biblio-fidoauthnrsecreqs" title="FIDO Authenticator Security Requirements">[FIDOAuthnrSecReqs]</a> document suite provides useful information about <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⓪">authenticator</a> security characteristics.</p>
    <p>The below subsections comprise the current Web Authentication-specific security considerations.
 They are divided by audience;
 general security considerations are direct subsections of this section,
-while security considerations specifically for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦①">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client⑨①">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③④⑨">Relying Party</a> implementers
+while security considerations specifically for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦①">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client⑨②">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⓪">Relying Party</a> implementers
 are grouped into respective subsections.</p>
    <h3 class="heading settled" data-level="13.1" id="sctn-credentialIdSecurity"><span class="secno">13.1. </span><span class="content">Credential ID Unsigned</span><a class="self-link" href="#sctn-credentialIdSecurity"></a></h3>
    <p>The <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④②">credential ID</a> is not signed.
 This is not a problem because all that would happen if an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦②">authenticator</a> returns
 the wrong <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④③">credential ID</a>, or if an attacker intercepts and manipulates the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④④">credential ID</a>, is that the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④⑥">WebAuthn Relying Party</a> would not look up the correct <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑤">credential public key</a> with which to verify the returned signed <a data-link-type="dfn" href="#authenticator-data" id="ref-for-authenticator-data⑤⑨">authenticator data</a> (a.k.a., <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①④">assertion</a>), and thus the interaction would end in an error.</p>
    <h3 class="heading settled" data-level="13.2" id="sctn-client-authenticator-proximity"><span class="secno">13.2. </span><span class="content">Physical Proximity between Client and Authenticator</span><a class="self-link" href="#sctn-client-authenticator-proximity"></a></h3>
-   <p>In the WebAuthn <a data-link-type="dfn" href="#authenticator-model" id="ref-for-authenticator-model④">authenticator model</a>, it is generally assumed that <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②④">roaming authenticators</a> are physically close to, and communicate directly with, the <a data-link-type="dfn" href="#client" id="ref-for-client⑨②">client</a>.
+   <p>In the WebAuthn <a data-link-type="dfn" href="#authenticator-model" id="ref-for-authenticator-model④">authenticator model</a>, it is generally assumed that <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②④">roaming authenticators</a> are physically close to, and communicate directly with, the <a data-link-type="dfn" href="#client" id="ref-for-client⑨③">client</a>.
 This arrangement has some important advantages.</p>
-   <p>The promise of physical proximity between <a data-link-type="dfn" href="#client" id="ref-for-client⑨③">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦③">authenticator</a> is a key strength of a <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⑤">something you have</a> <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⑥">authentication factor</a>.
+   <p>The promise of physical proximity between <a data-link-type="dfn" href="#client" id="ref-for-client⑨④">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦③">authenticator</a> is a key strength of a <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⑤">something you have</a> <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⑥">authentication factor</a>.
 For example, if a <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②⑤">roaming authenticator</a> can communicate only via USB or Bluetooth,
 the limited range of these transports ensures that any malicious actor
 must physically be within that range in order to interact with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦④">authenticator</a>.
 This is not necessarily true of an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑤">authenticator</a> that can be invoked remotely —
 even if the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑥">authenticator</a> verifies <a data-link-type="dfn" href="#concept-user-present" id="ref-for-concept-user-present④">user presence</a>,
 users can be tricked into authorizing remotely initiated malicious requests.</p>
-   <p>Direct communication between <a data-link-type="dfn" href="#client" id="ref-for-client⑨④">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑦">authenticator</a> means the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑤">client</a> can enforce the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⓪">scope</a> restrictions for <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②②">credentials</a>.
-By contrast, if the communication between <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑥">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑧">authenticator</a> is mediated by some third party,
-then the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑦">client</a> has to trust the third party to
+   <p>Direct communication between <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑤">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑦">authenticator</a> means the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑥">client</a> can enforce the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⓪">scope</a> restrictions for <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②②">credentials</a>.
+By contrast, if the communication between <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑦">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑧">authenticator</a> is mediated by some third party,
+then the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑧">client</a> has to trust the third party to
 enforce the <a data-link-type="dfn" href="#scope" id="ref-for-scope②①">scope</a> restrictions and control access to the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑦⑨">authenticator</a>.
 Failure to do either could result in
-a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⓪">Relying Party</a> receiving <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①④">authentication assertions</a> valid for other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤①">Relying Parties</a>,
+a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤①">Relying Party</a> receiving <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①④">authentication assertions</a> valid for other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤②">Relying Parties</a>,
 or in a malicious user gaining access to <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①⑤">authentication assertions</a> for other users.</p>
-   <p>If designing a solution where the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⓪">authenticator</a> does not need to be physically close to the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑧">client</a>,
-or where <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑨">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧①">authenticator</a> do not communicate directly,
+   <p>If designing a solution where the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⓪">authenticator</a> does not need to be physically close to the <a data-link-type="dfn" href="#client" id="ref-for-client⑨⑨">client</a>,
+or where <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⓪">client</a> and <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧①">authenticator</a> do not communicate directly,
 designers SHOULD consider how this affects the enforcement of <a data-link-type="dfn" href="#scope" id="ref-for-scope②②">scope</a> restrictions
 and the strength of the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧②">authenticator</a> as a <a data-link-type="dfn" href="https://pages.nist.gov/800-63-3/sp800-63-3.html#af" id="ref-for-af②⑦">something you have</a> authentication factor.</p>
    <h3 class="heading settled" data-level="13.3" id="sctn-security-considerations-authenticator"><span class="secno">13.3. </span><span class="content">Security considerations for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧③">authenticators</a> <span id="sctn-attestation-security-considerations"></span></span><a class="self-link" href="#sctn-security-considerations-authenticator"></a></h3>
@@ -8406,38 +8413,38 @@ <h4 class="heading settled" data-level="13.3.2" id="sctn-ca-compromise"><span cl
 Authenticator manufacturer may need to ship a firmware update and inject new <a data-link-type="dfn" href="#attestation-private-key" id="ref-for-attestation-private-key⑥">attestation private keys</a> and <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①①">certificates</a> into already
 manufactured <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator①④">WebAuthn Authenticators</a>, if the exposure was due to a firmware flaw. (The process by which this happens is out of
 scope for this specification.) If the <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator①⑤">WebAuthn Authenticator</a> manufacturer does not have this capability, then it may not be
-possible for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤②">Relying Parties</a> to trust any further <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤⓪">attestation statements</a> from the affected <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator①⑥">WebAuthn Authenticators</a>.</p>
-   <p>See also the related security consideration for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤③">Relying Parties</a> in <a href="#sctn-revoked-attestation-certificates">§ 13.4.5 Revoked Attestation Certificates</a>.</p>
-   <h3 class="heading settled" data-level="13.4" id="sctn-security-considerations-rp"><span class="secno">13.4. </span><span class="content">Security considerations for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤④">Relying Parties</a></span><a class="self-link" href="#sctn-security-considerations-rp"></a></h3>
+possible for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤③">Relying Parties</a> to trust any further <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤⓪">attestation statements</a> from the affected <a data-link-type="dfn" href="#webauthn-authenticator" id="ref-for-webauthn-authenticator①⑥">WebAuthn Authenticators</a>.</p>
+   <p>See also the related security consideration for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤④">Relying Parties</a> in <a href="#sctn-revoked-attestation-certificates">§ 13.4.5 Revoked Attestation Certificates</a>.</p>
+   <h3 class="heading settled" data-level="13.4" id="sctn-security-considerations-rp"><span class="secno">13.4. </span><span class="content">Security considerations for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑤">Relying Parties</a></span><a class="self-link" href="#sctn-security-considerations-rp"></a></h3>
    <h4 class="heading settled" data-level="13.4.1" id="sctn-rp-benefits"><span class="secno">13.4.1. </span><span class="content">Security Benefits for WebAuthn Relying Parties</span><a class="self-link" href="#sctn-rp-benefits"></a></h4>
    <p>The main benefits offered to <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④⑧">WebAuthn Relying Parties</a> by this specification include:</p>
    <ol>
     <li data-md>
      <p>Users and accounts can be secured using widely compatible, easy-to-use multi-factor authentication.</p>
     <li data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑤">Relying Party</a> does not need to provision <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑤">authenticator</a> hardware to its users. Instead, each user can independently obtain
-any conforming <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑥">authenticator</a> and use that same <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑦">authenticator</a> with any number of <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑥">Relying Parties</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑦">Relying Party</a> can optionally
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑥">Relying Party</a> does not need to provision <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑤">authenticator</a> hardware to its users. Instead, each user can independently obtain
+any conforming <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑥">authenticator</a> and use that same <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑦">authenticator</a> with any number of <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑦">Relying Parties</a>. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑧">Relying Party</a> can optionally
 enforce requirements on <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑧">authenticators</a>' security properties by inspecting the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤①">attestation statements</a> returned from the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑧⑨">authenticators</a>.</p>
     <li data-md>
      <p><a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③②">Authentication ceremonies</a> are resistant to <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186">man-in-the-middle attacks</a>.
 Regarding <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⑥">registration ceremonies</a>, see <a href="#sctn-attestation-limitations">§ 13.4.4 Attestation Limitations</a>, below.</p>
     <li data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑧">Relying Party</a> can automatically support multiple types of <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑤">user verification</a> - for example PIN, biometrics and/or future
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑨">Relying Party</a> can automatically support multiple types of <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑤">user verification</a> - for example PIN, biometrics and/or future
 methods - with little or no code change, and can let each user decide which they prefer to use via their choice of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⓪">authenticator</a>.</p>
     <li data-md>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑤⑨">Relying Party</a> does not need to store additional secrets in order to gain the above benefits.</p>
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⓪">Relying Party</a> does not need to store additional secrets in order to gain the above benefits.</p>
    </ol>
-   <p>As stated in the <a href="#sctn-conforming-relying-parties">Conformance</a> section, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⓪">Relying Party</a> MUST behave as described in <a href="#sctn-rp-operations">§ 7 WebAuthn Relying Party Operations</a> to obtain all of the above security benefits. However, one notable use case that departs slightly from this is described below in <a href="#sctn-attestation-limitations">§ 13.4.4 Attestation Limitations</a>.</p>
+   <p>As stated in the <a href="#sctn-conforming-relying-parties">Conformance</a> section, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥①">Relying Party</a> MUST behave as described in <a href="#sctn-rp-operations">§ 7 WebAuthn Relying Party Operations</a> to obtain all of the above security benefits. However, one notable use case that departs slightly from this is described below in <a href="#sctn-attestation-limitations">§ 13.4.4 Attestation Limitations</a>.</p>
    <h4 class="heading settled" data-level="13.4.2" id="sctn-seccons-visibility"><span class="secno">13.4.2. </span><span class="content">Visibility Considerations for Embedded Usage</span><a class="self-link" href="#sctn-seccons-visibility"></a></h4>
-   <p>Simplistic use of WebAuthn in an embedded context, e.g., within <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element④">iframe</a></code>s as described in <a href="#sctn-iframe-guidance">§ 5.10 Using Web Authentication within iframe elements</a>, may make users vulnerable to <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="ui-redressing">UI Redressing</dfn> attacks, also known as "<a href="https://en.wikipedia.org/wiki/Clickjacking">Clickjacking</a>". This is where an attacker overlays their own UI on top of a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥①">Relying Party</a>'s intended UI and attempts to trick the user into performing unintended actions with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥②">Relying Party</a>. For example, using these techniques, an attacker might be able to trick users into purchasing items, transferring money, etc.</p>
-   <p>Even though WebAuthn-specific UI is typically handled by the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑥">client platform</a> and thus is not vulnerable to <a data-link-type="dfn" href="#ui-redressing" id="ref-for-ui-redressing①">UI Redressing</a>, it is likely important for an <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥③">Relying Party</a> having embedded WebAuthn-wielding content to ensure that their content’s UI is visible to the user. An emerging means to do so is by observing the status of the experimental <a href="https://w3c.github.io/IntersectionObserver/v2/">Intersection Observer v2</a>'s <code>isVisible</code> attribute. For example, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥④">Relying Party</a>'s script running in the embedded context could pre-emptively load itself in a popup window if it detects <code>isVisble</code> being set to <code>false</code>, thus side-stepping any occlusion of their content.</p>
+   <p>Simplistic use of WebAuthn in an embedded context, e.g., within <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element④">iframe</a></code>s as described in <a href="#sctn-iframe-guidance">§ 5.10 Using Web Authentication within iframe elements</a>, may make users vulnerable to <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="ui-redressing">UI Redressing</dfn> attacks, also known as "<a href="https://en.wikipedia.org/wiki/Clickjacking">Clickjacking</a>". This is where an attacker overlays their own UI on top of a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥②">Relying Party</a>'s intended UI and attempts to trick the user into performing unintended actions with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥③">Relying Party</a>. For example, using these techniques, an attacker might be able to trick users into purchasing items, transferring money, etc.</p>
+   <p>Even though WebAuthn-specific UI is typically handled by the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑥">client platform</a> and thus is not vulnerable to <a data-link-type="dfn" href="#ui-redressing" id="ref-for-ui-redressing①">UI Redressing</a>, it is likely important for an <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥④">Relying Party</a> having embedded WebAuthn-wielding content to ensure that their content’s UI is visible to the user. An emerging means to do so is by observing the status of the experimental <a href="https://w3c.github.io/IntersectionObserver/v2/">Intersection Observer v2</a>'s <code>isVisible</code> attribute. For example, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑤">Relying Party</a>'s script running in the embedded context could pre-emptively load itself in a popup window if it detects <code>isVisble</code> being set to <code>false</code>, thus side-stepping any occlusion of their content.</p>
    <h4 class="heading settled" data-level="13.4.3" id="sctn-cryptographic-challenges"><span class="secno">13.4.3. </span><span class="content">Cryptographic Challenges</span><a class="self-link" href="#sctn-cryptographic-challenges"></a></h4>
    <p>As a cryptographic protocol, Web Authentication is dependent upon randomized challenges
 to avoid replay attacks. Therefore, the values of both <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialcreationoptions" id="ref-for-dictdef-publickeycredentialcreationoptions①③">PublicKeyCredentialCreationOptions</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-challenge" id="ref-for-dom-publickeycredentialcreationoptions-challenge④">challenge</a></code> and <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①④">PublicKeyCredentialRequestOptions</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-challenge" id="ref-for-dom-publickeycredentialrequestoptions-challenge④">challenge</a></code> MUST be randomly generated
-by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑤">Relying Parties</a> in an environment they trust (e.g., on the server-side), and the
+by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑥">Relying Parties</a> in an environment they trust (e.g., on the server-side), and the
 returned <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-challenge" id="ref-for-dom-collectedclientdata-challenge⑧">challenge</a></code> value in the client’s
 response MUST match what was generated. This SHOULD be done in a fashion that does not rely
-upon a client’s behavior, e.g., the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑥">Relying Party</a> SHOULD store the challenge temporarily
+upon a client’s behavior, e.g., the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑦">Relying Party</a> SHOULD store the challenge temporarily
 until the operation is complete. Tolerating a mismatch will compromise the security
 of the protocol.</p>
    <p>In order to prevent replay attacks, the challenges MUST contain enough entropy to make guessing them infeasible. Challenges SHOULD
@@ -8448,88 +8455,88 @@ <h4 class="heading settled" data-level="13.4.4" id="sctn-attestation-limitations
 may allow the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party④⑨">WebAuthn Relying Party</a> to derive assurances about various <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨①">authenticator</a> qualities.
 For example, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨②">authenticator</a> model, or how it stores and protects <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②②">credential private keys</a>.
 However, it is important to note that an <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤③">attestation statement</a>, on its own,
-provides no means for a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑦">Relying Party</a> to verify that an <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object②⑤">attestation object</a> was generated
+provides no means for a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑧">Relying Party</a> to verify that an <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object②⑤">attestation object</a> was generated
 by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨③">authenticator</a> the user intended, and not by a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186①">man-in-the-middle attacker</a>.
-For example, such an attacker could use malicious code injected into <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑧">Relying Party</a> script.
-The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑨">Relying Party</a> must therefore rely on other means, e.g., TLS and related technologies,
+For example, such an attacker could use malicious code injected into <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑥⑨">Relying Party</a> script.
+The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⓪">Relying Party</a> must therefore rely on other means, e.g., TLS and related technologies,
 to protect the <a data-link-type="dfn" href="#attestation-object" id="ref-for-attestation-object②⑥">attestation object</a> from <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186②">man-in-the-middle attacks</a>.</p>
    <p>Under the assumption that a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⑦">registration ceremony</a> is completed securely, and that the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨④">authenticator</a> maintains
 confidentiality of the <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②③">credential private key</a>, subsequent <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③③">authentication ceremonies</a> using that <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤⑧">public key
 credential</a> are resistant to tampering by <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186③">man-in-the-middle attacks</a>.</p>
    <p>The discussion above holds for all <a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type②④">attestation types</a>. In all cases it is possible for a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186④">man-in-the-middle attacker</a> to replace the <code class="idl"><a data-link-type="idl" href="#publickeycredential" id="ref-for-publickeycredential②⑦">PublicKeyCredential</a></code> object, including the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤④">attestation statement</a> and the <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑥">credential public key</a> to be registered, and subsequently tamper with future <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①⑥">authentication assertions</a> <a data-link-type="dfn" href="#scope" id="ref-for-scope②③">scoped</a> for the
-same <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⓪">Relying Party</a> and passing through the same attacker.</p>
-   <p>Such an attack would potentially be detectable; since the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦①">Relying Party</a> has registered the attacker’s <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑦">credential public key</a> rather
-than the user’s, the attacker must tamper with all subsequent <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③④">authentication ceremonies</a> with that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦②">Relying Party</a>: unscathed
+same <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦①">Relying Party</a> and passing through the same attacker.</p>
+   <p>Such an attack would potentially be detectable; since the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦②">Relying Party</a> has registered the attacker’s <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑦">credential public key</a> rather
+than the user’s, the attacker must tamper with all subsequent <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③④">authentication ceremonies</a> with that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦③">Relying Party</a>: unscathed
 ceremonies will fail, potentially revealing the attack.</p>
-   <p><a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type②⑤">Attestation types</a> other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑨">Self Attestation</a> and <a data-link-type="dfn" href="#none" id="ref-for-none⑨">None</a> can increase the difficulty of such attacks, since <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦③">Relying Parties</a> can possibly display <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑤">authenticator</a> information, e.g., model designation, to the user. An attacker might therefore need to use
-a genuine <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑥">authenticator</a> of the same model as the user’s <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑦">authenticator</a>, or the user might notice that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦④">Relying Party</a> reports
+   <p><a data-link-type="dfn" href="#attestation-type" id="ref-for-attestation-type②⑤">Attestation types</a> other than <a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation①⑨">Self Attestation</a> and <a data-link-type="dfn" href="#none" id="ref-for-none⑨">None</a> can increase the difficulty of such attacks, since <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦④">Relying Parties</a> can possibly display <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑤">authenticator</a> information, e.g., model designation, to the user. An attacker might therefore need to use
+a genuine <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑥">authenticator</a> of the same model as the user’s <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑦">authenticator</a>, or the user might notice that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑤">Relying Party</a> reports
 a different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑧">authenticator</a> model than the user expects.</p>
    <p class="note" role="note"><span class="marker">Note:</span> All variants of <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186⑤">man-in-the-middle attacks</a> described above are more difficult for an attacker to mount
 than a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186⑥">man-in-the-middle attack</a> against conventional password authentication.</p>
    <h4 class="heading settled" data-level="13.4.5" id="sctn-revoked-attestation-certificates"><span class="secno">13.4.5. </span><span class="content">Revoked Attestation Certificates</span><a class="self-link" href="#sctn-revoked-attestation-certificates"></a></h4>
-   <p>If <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①②">attestation certificate</a> validation fails due to a revoked intermediate attestation CA certificate, and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑤">Relying Party</a>'s policy
-requires rejecting the registration/authentication request in these situations, then it is RECOMMENDED that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑥">Relying Party</a> also
+   <p>If <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①②">attestation certificate</a> validation fails due to a revoked intermediate attestation CA certificate, and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑥">Relying Party</a>'s policy
+requires rejecting the registration/authentication request in these situations, then it is RECOMMENDED that the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑦">Relying Party</a> also
 un-registers (or marks with a trust level equivalent to "<a data-link-type="dfn" href="#self-attestation" id="ref-for-self-attestation②⓪">self attestation</a>") <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑤⑨">public key credentials</a> that were registered
 after the CA compromise date using an <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①③">attestation certificate</a> chaining up to the same intermediate CA. It is thus RECOMMENDED
-that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑦">Relying Parties</a> remember intermediate attestation CA certificates during <a data-link-type="dfn" href="#registration" id="ref-for-registration②③">registration</a> in order to un-register
+that <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑧">Relying Parties</a> remember intermediate attestation CA certificates during <a data-link-type="dfn" href="#registration" id="ref-for-registration②③">registration</a> in order to un-register
 related <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⓪">public key credentials</a> if the <a data-link-type="dfn" href="#registration" id="ref-for-registration②④">registration</a> was performed after revocation of such certificates.</p>
    <p>See also the related security consideration for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator②⑨⑨">authenticators</a> in <a href="#sctn-ca-compromise">§ 13.3.2 Attestation Certificate and Attestation Certificate CA Compromise</a>.</p>
    <h4 class="heading settled" data-level="13.4.6" id="sctn-credential-loss-key-mobility"><span class="secno">13.4.6. </span><span class="content">Credential Loss and Key Mobility</span><a class="self-link" href="#sctn-credential-loss-key-mobility"></a></h4>
    <p>This specification defines no protocol for backing up <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②④">credential private keys</a>, or for sharing them between <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⓪">authenticators</a>.
 In general, it is expected that a <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②⑤">credential private key</a> never leaves the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪①">authenticator</a> that created it. Losing an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪②">authenticator</a> therefore, in general, means losing all <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥①">credentials</a> <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①⑤">bound</a> to the
-lost <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪③">authenticator</a>, which could lock the user out of an account if the user has only one <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥②">credential</a> registered with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑧">Relying Party</a>. Instead of backing up or sharing private keys, the Web Authentication API allows registering
+lost <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪③">authenticator</a>, which could lock the user out of an account if the user has only one <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥②">credential</a> registered with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑨">Relying Party</a>. Instead of backing up or sharing private keys, the Web Authentication API allows registering
 multiple <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥③">credentials</a> for the same user. For example, a user might register <a data-link-type="dfn" href="#platform-credential" id="ref-for-platform-credential②">platform credentials</a> on
 frequently used <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④⑤">client devices</a>, and one or more <a data-link-type="dfn" href="#roaming-credential" id="ref-for-roaming-credential①">roaming credentials</a> for use as backup and with new or rarely used <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④⑥">client
 devices</a>.</p>
-   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑦⑨">Relying Parties</a> SHOULD allow and encourage users to register multiple <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥④">credentials</a> to the same <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑦">user account</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⓪">Relying Parties</a> SHOULD make use of the <code><code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials②">excludeCredentials</a></code></code> and <code><code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-user" id="ref-for-dom-publickeycredentialcreationoptions-user⑦">user</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id⑨">id</a></code></code> options to ensure that these
+   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⓪">Relying Parties</a> SHOULD allow and encourage users to register multiple <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥④">credentials</a> to the same <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑧">user account</a>. <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧①">Relying Parties</a> SHOULD make use of the <code><code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials②">excludeCredentials</a></code></code> and <code><code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-user" id="ref-for-dom-publickeycredentialcreationoptions-user⑦">user</a></code>.<code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id⑨">id</a></code></code> options to ensure that these
 different <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑤">credentials</a> are <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①⑥">bound</a> to different <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪④">authenticators</a>.</p>
    <h4 class="heading settled" data-level="13.4.7" id="sctn-unprotected-account-detection"><span class="secno">13.4.7. </span><span class="content">Unprotected account detection</span><a class="self-link" href="#sctn-unprotected-account-detection"></a></h4>
    <p><em>This section is not normative.</em></p>
-   <p>This security consideration applies to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧①">Relying Parties</a> that support <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑤">authentication ceremonies</a> with a non-<a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty①①">empty</a> <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑤">allowCredentials</a></code> argument as the first authentication step.
+   <p>This security consideration applies to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧②">Relying Parties</a> that support <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑤">authentication ceremonies</a> with a non-<a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty①①">empty</a> <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑤">allowCredentials</a></code> argument as the first authentication step.
 For example, if using authentication with <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①⑤">server-side credentials</a> as the first authentication step.</p>
    <p>In this case the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑥">allowCredentials</a></code> argument risks leaking information
-about which <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑧">user accounts</a> have WebAuthn credentials registered and which do not,
+about which <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑨">user accounts</a> have WebAuthn credentials registered and which do not,
 which may be a signal of account protection strength.
 For example, say an attacker can initiate an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑥">authentication ceremony</a> by providing only a username,
-and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧②">Relying Party</a> responds with a non-empty <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑦">allowCredentials</a></code> for some <a data-link-type="dfn" href="#user-account" id="ref-for-user-account③⑨">user accounts</a>,
-and with failure or a password challenge for other <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④⓪">user accounts</a>.
-The attacker can then conclude that the latter <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④①">user accounts</a> likely do not require a WebAuthn <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①⑤">assertion</a> for successful authentication,
+and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧③">Relying Party</a> responds with a non-empty <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑦">allowCredentials</a></code> for some <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④⓪">user accounts</a>,
+and with failure or a password challenge for other <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④①">user accounts</a>.
+The attacker can then conclude that the latter <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④②">user accounts</a> likely do not require a WebAuthn <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①⑤">assertion</a> for successful authentication,
 and thus focus an attack on those likely weaker accounts.</p>
    <p>This issue is similar to the one described in <a href="#sctn-username-enumeration">§ 14.6.2 Username Enumeration</a> and <a href="#sctn-credential-id-privacy-leak">§ 14.6.3 Privacy leak via credential IDs</a>, and can be mitigated in similar ways.</p>
    <h4 class="heading settled" data-level="13.4.8" id="sctn-code-injection"><span class="secno">13.4.8. </span><span class="content">Code injection attacks</span><a class="self-link" href="#sctn-code-injection"></a></h4>
-   <p>Any malicious code executing on an <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised④">origin</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②④">scope</a> of a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧③">Relying Party</a>'s <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑥">public key credentials</a> has the potential to invalidate any and all security guarantees WebAuthn may provide. <a data-link-type="dfn" href="#webauthn-client" id="ref-for-webauthn-client⑧">WebAuthn Clients</a> only expose the WebAuthn API in <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#secure-context" id="ref-for-secure-context①">secure contexts</a>,
-which mitigates the most basic attacks but SHOULD be combined with additional precautions by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧④">Relying Parties</a>.</p>
+   <p>Any malicious code executing on an <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised④">origin</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②④">scope</a> of a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧④">Relying Party</a>'s <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑥">public key credentials</a> has the potential to invalidate any and all security guarantees WebAuthn may provide. <a data-link-type="dfn" href="#webauthn-client" id="ref-for-webauthn-client⑧">WebAuthn Clients</a> only expose the WebAuthn API in <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#secure-context" id="ref-for-secure-context①">secure contexts</a>,
+which mitigates the most basic attacks but SHOULD be combined with additional precautions by <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑤">Relying Parties</a>.</p>
    <p>Code injection can happen in several ways;
 this section attempts to point out some likely scenarios and suggest suitable mitigations,
 but is not an exhaustive list.</p>
    <ul>
     <li data-md>
-     <p>Malicous code could be injected by a third-party script included by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑤">Relying Party</a>,
+     <p>Malicous code could be injected by a third-party script included by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑥">Relying Party</a>,
 either intentionally or due to a security vulnerability in the third party.</p>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑥">Relying Party</a> therefore SHOULD limit the amount of third-party script included on the <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised⑤">origins</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑤">scope</a> of its <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②③">credentials</a>.</p>
-     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑦">Relying Party</a> SHOULD use Content Security Policy <a data-link-type="biblio" href="#biblio-csp2" title="Content Security Policy Level 2">[CSP2]</a>,
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑦">Relying Party</a> therefore SHOULD limit the amount of third-party script included on the <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised⑤">origins</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑤">scope</a> of its <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②③">credentials</a>.</p>
+     <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑧">Relying Party</a> SHOULD use Content Security Policy <a data-link-type="biblio" href="#biblio-csp2" title="Content Security Policy Level 2">[CSP2]</a>,
 and/or other appropriate technologies available at the time, to limit what script can run on its <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised⑥">origins</a>.</p>
     <li data-md>
      <p>Malicious code could, by the credential <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑥">scope</a> rules, be hosted on a subdomain of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id⑤⓪">RP ID</a>.
 For example, user-submitted code hosted on <code>usercontent.example.org</code> could exercise any <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②④">credentials</a> <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑦">scoped</a> to the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id⑤①">RP ID</a> <code>example.org</code>.
-If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑧">Relying Party</a> allows a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑨">origin</a></code> when <a href="#rp-op-verifying-assertion-step-origin">verifying the assertion</a>,
+If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑨">Relying Party</a> allows a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin⑨">origin</a></code> when <a href="#rp-op-verifying-assertion-step-origin">verifying the assertion</a>,
 malicious users could use this to launch a <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-186" id="ref-for-page-186⑦">man-in-the-middle attack</a> to obtain valid <a data-link-type="dfn" href="#authentication-assertion" id="ref-for-authentication-assertion①⑦">authentication assertions</a> and impersonate the victims of the attack.</p>
-     <p>Therefore, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑧⑨">Relying Party</a> by default SHOULD NOT allow a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①⓪">origin</a></code> when <a href="#rp-op-verifying-assertion-step-origin">verifying the assertion</a>.
-If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⓪">Relying Party</a> needs to allow a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①①">origin</a></code>,
-then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨①">Relying Party</a> MUST NOT serve untrusted code on any allowed subdomain of <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised⑦">origins</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑧">scope</a> of its <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑦">public key credentials</a>.</p>
+     <p>Therefore, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⓪">Relying Party</a> by default SHOULD NOT allow a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①⓪">origin</a></code> when <a href="#rp-op-verifying-assertion-step-origin">verifying the assertion</a>.
+If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨①">Relying Party</a> needs to allow a subdomain <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①①">origin</a></code>,
+then the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨②">Relying Party</a> MUST NOT serve untrusted code on any allowed subdomain of <a data-link-type="dfn" href="#determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised" id="ref-for-determines-the-set-of-origins-on-which-the-public-key-credential-may-be-exercised⑦">origins</a> within the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑧">scope</a> of its <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑦">public key credentials</a>.</p>
    </ul>
    <h4 class="heading settled" data-level="13.4.9" id="sctn-validating-origin"><span class="secno">13.4.9. </span><span class="content">Validating the origin of a credential</span><a class="self-link" href="#sctn-validating-origin"></a></h4>
    <p>When <a href="#rp-op-registering-a-new-credential-step-origin">registering a credential</a> and
 when <a href="#rp-op-verifying-assertion-step-origin">verifying an assertion</a>,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨②">Relying Party</a> MUST validate the <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①②">origin</a></code> member of the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data①④">client data</a>.</p>
-   <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨③">Relying Party</a> MUST NOT accept unexpected values of <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①③">origin</a></code>,
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨③">Relying Party</a> MUST validate the <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①②">origin</a></code> member of the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data①④">client data</a>.</p>
+   <p>The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨④">Relying Party</a> MUST NOT accept unexpected values of <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①③">origin</a></code>,
 as doing so could allow a malicious website to obtain valid <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②⑤">credentials</a>.
 Although the <a data-link-type="dfn" href="#scope" id="ref-for-scope②⑨">scope</a> of <a data-link-type="dfn">WebAuthn credentials</a> prevents their use on domains
 outside the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id⑤②">RP ID</a> they were registered for,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨④">Relying Party</a>'s origin validation serves as an additional layer of protection
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑤">Relying Party</a>'s origin validation serves as an additional layer of protection
 in case a faulty <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑤">authenticator</a> fails to enforce credential <a data-link-type="dfn" href="#scope" id="ref-for-scope③⓪">scope</a>.
 See also <a href="#sctn-code-injection">§ 13.4.8 Code injection attacks</a> for discussion of potentially malicious subdomains.</p>
-   <p>Validation MAY be performed by exact string matching or any other method as needed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑤">Relying Party</a>.
+   <p>Validation MAY be performed by exact string matching or any other method as needed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑥">Relying Party</a>.
 For example:</p>
    <ul>
     <li data-md>
@@ -8544,11 +8551,11 @@ <h4 class="heading settled" data-level="13.4.9" id="sctn-validating-origin"><spa
      <p class="note" role="note"><span class="marker">Note:</span> See <a href="#sctn-code-injection">§ 13.4.8 Code injection attacks</a> for a discussion of the risks of allowing any subdomain of the <a data-link-type="dfn" href="#rp-id" id="ref-for-rp-id⑤⑤">RP ID</a>.</p>
     <li data-md>
      <p>A web application with a companion native application might allow <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①⑧">origin</a></code> to be an operating system dependent
-identifier for the native application. For example, such a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑥">Relying Party</a> might require that <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①⑨">origin</a></code> exactly equals some element of the list <code>["https://example.org", "example-os:appid:204ffa1a5af110ac483f131a1bef8a841a7adb0d8d135908bbd964ed05d2653b"]</code>.</p>
+identifier for the native application. For example, such a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑦">Relying Party</a> might require that <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-origin" id="ref-for-dom-collectedclientdata-origin①⑨">origin</a></code> exactly equals some element of the list <code>["https://example.org", "example-os:appid:204ffa1a5af110ac483f131a1bef8a841a7adb0d8d135908bbd964ed05d2653b"]</code>.</p>
    </ul>
    <p>Similar considerations apply when validating the <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin①①">topOrigin</a></code> member of the <a data-link-type="dfn" href="#client-data" id="ref-for-client-data①⑤">client data</a>.
-When <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin①②">topOrigin</a></code> is present, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑦">Relying Party</a> MUST validate that its value is expected.
-This validation MAY be performed by exact string matching or any other method as needed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑧">Relying Party</a>.
+When <code class="idl"><a data-link-type="idl" href="#dom-collectedclientdata-toporigin" id="ref-for-dom-collectedclientdata-toporigin①②">topOrigin</a></code> is present, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑧">Relying Party</a> MUST validate that its value is expected.
+This validation MAY be performed by exact string matching or any other method as needed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑨">Relying Party</a>.
 For example:</p>
    <ul>
     <li data-md>
@@ -8566,7 +8573,7 @@ <h2 class="heading settled" data-level="14" id="sctn-privacy-considerations"><sp
    <p>The privacy principles in <a data-link-type="biblio" href="#biblio-fido-privacy-principles" title="FIDO Privacy Principles">[FIDO-Privacy-Principles]</a> also apply to this specification.</p>
    <p>This section is divided by audience;
 general privacy considerations are direct subsections of this section,
-while privacy considerations specifically for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑥">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⓪">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party③⑨⑨">Relying Party</a> implementers
+while privacy considerations specifically for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑥">authenticator</a>, <a data-link-type="dfn" href="#client" id="ref-for-client①⓪①">client</a> and <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⓪">Relying Party</a> implementers
 are grouped into respective subsections.</p>
    <h3 class="heading settled" data-level="14.1" id="sctn-privacy-attacks"><span class="secno">14.1. </span><span class="content">De-anonymization Prevention Measures</span><a class="self-link" href="#sctn-privacy-attacks"></a></h3>
    <p><em>This section is not normative.</em></p>
@@ -8578,55 +8585,55 @@ <h3 class="heading settled" data-level="14.1" id="sctn-privacy-attacks"><span cl
     <li data-md>
      <p>The user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑤">credential IDs</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑧">credential public keys</a>.</p>
      <p>These are registered by the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤⓪">WebAuthn Relying Party</a> and subsequently used by the user to prove possession of the corresponding <a data-link-type="dfn" href="#credential-private-key" id="ref-for-credential-private-key②⑥">credential
-private key</a>. They are also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪①">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑦">authenticator</a>.</p>
+private key</a>. They are also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪②">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑦">authenticator</a>.</p>
     <li data-md>
-     <p>The user’s identities specific to each <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⓪">Relying Party</a>, e.g., usernames and <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑤">user handles</a>.</p>
-     <p>These identities are obviously used by each <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪①">Relying Party</a> to identify a user in their system. They are also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪②">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑧">authenticator</a>.</p>
+     <p>The user’s identities specific to each <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪①">Relying Party</a>, e.g., usernames and <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑤">user handles</a>.</p>
+     <p>These identities are obviously used by each <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪②">Relying Party</a> to identify a user in their system. They are also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪③">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑧">authenticator</a>.</p>
     <li data-md>
      <p>The user’s biometric characteristic(s), e.g., fingerprints or facial recognition data <a data-link-type="biblio" href="#biblio-isobiometricvocabulary" title="Information technology — Vocabulary — Biometrics">[ISOBiometricVocabulary]</a>.</p>
-     <p>This is optionally used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑨">authenticator</a> to perform <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑥">user verification</a>. It is not revealed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪②">Relying Party</a>, but in
-the case of <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③⓪">platform authenticators</a>, it might be visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪③">client</a> depending on the implementation.</p>
+     <p>This is optionally used by the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③⓪⑨">authenticator</a> to perform <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑥">user verification</a>. It is not revealed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪③">Relying Party</a>, but in
+the case of <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③⓪">platform authenticators</a>, it might be visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪④">client</a> depending on the implementation.</p>
     <li data-md>
      <p>The models of the user’s <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⓪">authenticators</a>, e.g., product names.</p>
-     <p>This is exposed in the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤⑤">attestation statement</a> provided to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪③">Relying Party</a> during <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑤">registration</a>. It is also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪④">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①①">authenticator</a>.</p>
+     <p>This is exposed in the <a data-link-type="dfn" href="#attestation-statement" id="ref-for-attestation-statement⑤⑤">attestation statement</a> provided to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪④">Relying Party</a> during <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑤">registration</a>. It is also visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑤">client</a> in the communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①①">authenticator</a>.</p>
     <li data-md>
      <p>The identities of the user’s <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①②">authenticators</a>, e.g., serial numbers.</p>
-     <p>This is possibly used by the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑤">client</a> to enable communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①③">authenticator</a>, but is not exposed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪④">Relying Party</a>.</p>
+     <p>This is possibly used by the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑥">client</a> to enable communication with the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①③">authenticator</a>, but is not exposed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑤">Relying Party</a>.</p>
    </ul>
-   <p>Some of the above information is necessarily shared with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑤">Relying Party</a>. The following sections describe the measures taken to
-prevent malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑥">Relying Parties</a> from using it to discover a user’s personal identity.</p>
+   <p>Some of the above information is necessarily shared with the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑥">Relying Party</a>. The following sections describe the measures taken to
+prevent malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑦">Relying Parties</a> from using it to discover a user’s personal identity.</p>
    <h3 class="heading settled" data-level="14.2" id="sctn-non-correlatable-credentials"><span class="secno">14.2. </span><span class="content">Anonymous, Scoped, Non-correlatable <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑧">Public Key Credentials</a></span><a class="self-link" href="#sctn-non-correlatable-credentials"></a></h3>
    <p><em>This section is not normative.</em></p>
    <p>Although <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑥">Credential IDs</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key③⑨">credential public keys</a> are necessarily shared with the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤①">WebAuthn Relying Party</a> to enable strong
-authentication, they are designed to be minimally identifying and not shared between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑦">Relying Parties</a>.</p>
+authentication, they are designed to be minimally identifying and not shared between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑧">Relying Parties</a>.</p>
    <ul>
     <li data-md>
      <p><a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑦">Credential IDs</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key④⓪">credential public keys</a> are meaningless in isolation, as they only identify <a data-link-type="dfn" href="#credential-key-pair" id="ref-for-credential-key-pair⑦">credential key pairs</a> and not users directly.</p>
     <li data-md>
-     <p>Each <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑨">public key credential</a> is strictly <a data-link-type="dfn" href="#scope" id="ref-for-scope③①">scoped</a> to a specific <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑧">Relying Party</a>, and the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑥">client</a> ensures that its existence is not
-revealed to other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑨">Relying Parties</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⓪">Relying Party</a> thus cannot ask the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑦">client</a> to reveal a user’s other identities.</p>
+     <p>Each <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑥⑨">public key credential</a> is strictly <a data-link-type="dfn" href="#scope" id="ref-for-scope③①">scoped</a> to a specific <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⓪⑨">Relying Party</a>, and the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑦">client</a> ensures that its existence is not
+revealed to other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⓪">Relying Parties</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①①">Relying Party</a> thus cannot ask the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑧">client</a> to reveal a user’s other identities.</p>
     <li data-md>
-     <p>The <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑧">client</a> also ensures that the existence of a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⓪">public key credential</a> is not revealed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①①">Relying Party</a> without <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent②⑥">user
-consent</a>. This is detailed further in <a href="#sctn-make-credential-privacy">§ 14.5.1 Registration Ceremony Privacy</a> and <a href="#sctn-assertion-privacy">§ 14.5.2 Authentication Ceremony Privacy</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①②">Relying Party</a> thus cannot silently identify a user, even if the user has a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦①">public key credential</a> registered and available.</p>
+     <p>The <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑨">client</a> also ensures that the existence of a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⓪">public key credential</a> is not revealed to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①②">Relying Party</a> without <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent②⑥">user
+consent</a>. This is detailed further in <a href="#sctn-make-credential-privacy">§ 14.5.1 Registration Ceremony Privacy</a> and <a href="#sctn-assertion-privacy">§ 14.5.2 Authentication Ceremony Privacy</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①③">Relying Party</a> thus cannot silently identify a user, even if the user has a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦①">public key credential</a> registered and available.</p>
     <li data-md>
      <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①④">Authenticators</a> ensure that the <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑧">credential IDs</a> and <a data-link-type="dfn" href="#credential-public-key" id="ref-for-credential-public-key④①">credential public keys</a> of different <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦②">public key credentials</a> are
-not correlatable as belonging to the same user. A pair of malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①③">Relying Parties</a> thus cannot correlate users between their
+not correlatable as belonging to the same user. A pair of malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①④">Relying Parties</a> thus cannot correlate users between their
 systems without additional information, e.g., a willfully reused username or e-mail address.</p>
     <li data-md>
-     <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑤">Authenticators</a> ensure that their <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①④">attestation certificates</a> are not unique enough to identify a single <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑥">authenticator</a> or a small group of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑦">authenticators</a>. This is detailed further in <a href="#sctn-attestation-privacy">§ 14.4.1 Attestation Privacy</a>. A pair of malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①④">Relying Parties</a> thus cannot correlate users between their systems by tracking individual <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑧">authenticators</a>.</p>
+     <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑤">Authenticators</a> ensure that their <a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①④">attestation certificates</a> are not unique enough to identify a single <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑥">authenticator</a> or a small group of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑦">authenticators</a>. This is detailed further in <a href="#sctn-attestation-privacy">§ 14.4.1 Attestation Privacy</a>. A pair of malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑤">Relying Parties</a> thus cannot correlate users between their systems by tracking individual <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑧">authenticators</a>.</p>
    </ul>
    <p>Additionally, a <a data-link-type="dfn" href="#client-side-discoverable-public-key-credential-source" id="ref-for-client-side-discoverable-public-key-credential-source⑧">client-side discoverable public key credential source</a> can optionally include a <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑥">user
-handle</a> specified by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑤">Relying Party</a>. The <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦③">credential</a> can then be used to both identify and <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑥">authenticate</a> the user.
-This means that a privacy-conscious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑥">Relying Party</a> can allow creation of a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④②">user account</a> without a traditional username,
-further improving non-correlatability between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑦">Relying Parties</a>.</p>
+handle</a> specified by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑥">Relying Party</a>. The <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦③">credential</a> can then be used to both identify and <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑥">authenticate</a> the user.
+This means that a privacy-conscious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑦">Relying Party</a> can allow creation of a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④③">user account</a> without a traditional username,
+further improving non-correlatability between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑧">Relying Parties</a>.</p>
    <h3 class="heading settled" data-level="14.3" id="sctn-biometric-privacy"><span class="secno">14.3. </span><span class="content">Authenticator-local <a data-link-type="dfn" href="#biometric-recognition" id="ref-for-biometric-recognition④">Biometric Recognition</a></span><a class="self-link" href="#sctn-biometric-privacy"></a></h3>
    <p><a data-link-type="dfn" href="#biometric-authenticator" id="ref-for-biometric-authenticator①">Biometric authenticators</a> perform the <a data-link-type="dfn" href="#biometric-recognition" id="ref-for-biometric-recognition⑤">biometric recognition</a> internally in the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③①⑨">authenticator</a> - though for <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③①">platform
-authenticators</a> the biometric data might also be visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①⓪⑨">client</a>, depending on the implementation. Biometric data is
-not revealed to the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤②">WebAuthn Relying Party</a>; it is used only locally to perform <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑦">user verification</a> authorizing the creation and <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑥">registration</a> of, or <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑦">authentication</a> using, a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦④">public key credential</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑧">Relying Party</a> therefore cannot discover the
-user’s personal identity via biometric data, and a security breach at a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑨">Relying Party</a> cannot expose biometric data for an attacker to
-use for forging logins at other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⓪">Relying Parties</a>.</p>
-   <p>In the case where a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②①">Relying Party</a> requires <a data-link-type="dfn" href="#biometric-recognition" id="ref-for-biometric-recognition⑥">biometric recognition</a>, this is performed locally by the <a data-link-type="dfn" href="#biometric-authenticator" id="ref-for-biometric-authenticator②">biometric authenticator</a> perfoming <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑧">user verification</a> and then signaling the result by setting the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①⑦">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags⑤①">flag</a> in the signed <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①⑥">assertion</a> response,
-instead of revealing the biometric data itself to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②②">Relying Party</a>.</p>
+authenticators</a> the biometric data might also be visible to the <a data-link-type="dfn" href="#client" id="ref-for-client①①⓪">client</a>, depending on the implementation. Biometric data is
+not revealed to the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤②">WebAuthn Relying Party</a>; it is used only locally to perform <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑦">user verification</a> authorizing the creation and <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑥">registration</a> of, or <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑦">authentication</a> using, a <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦④">public key credential</a>. A malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④①⑨">Relying Party</a> therefore cannot discover the
+user’s personal identity via biometric data, and a security breach at a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⓪">Relying Party</a> cannot expose biometric data for an attacker to
+use for forging logins at other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②①">Relying Parties</a>.</p>
+   <p>In the case where a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②②">Relying Party</a> requires <a data-link-type="dfn" href="#biometric-recognition" id="ref-for-biometric-recognition⑥">biometric recognition</a>, this is performed locally by the <a data-link-type="dfn" href="#biometric-authenticator" id="ref-for-biometric-authenticator②">biometric authenticator</a> perfoming <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑧">user verification</a> and then signaling the result by setting the <a data-link-type="dfn" href="#authdata-flags-uv" id="ref-for-authdata-flags-uv①⑦">UV</a> <a data-link-type="dfn" href="#authdata-flags" id="ref-for-authdata-flags⑤①">flag</a> in the signed <a data-link-type="dfn" href="#assertion" id="ref-for-assertion①⑥">assertion</a> response,
+instead of revealing the biometric data itself to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②③">Relying Party</a>.</p>
    <h3 class="heading settled" data-level="14.4" id="sctn-privacy-considerations-authenticator"><span class="secno">14.4. </span><span class="content">Privacy considerations for <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⓪">authenticators</a></span><a class="self-link" href="#sctn-privacy-considerations-authenticator"></a></h3>
    <h4 class="heading settled" data-level="14.4.1" id="sctn-attestation-privacy"><span class="secno">14.4.1. </span><span class="content">Attestation Privacy</span><a class="self-link" href="#sctn-attestation-privacy"></a></h4>
    <p><a data-link-type="dfn" href="#attestation-certificate" id="ref-for-attestation-certificate①⑤">Attestation certificates</a> and <a data-link-type="dfn" href="#attestation-key-pair" id="ref-for-attestation-key-pair⑦">attestation key pairs</a> can be used to track users
@@ -8653,81 +8660,81 @@ <h4 class="heading settled" data-level="14.4.1" id="sctn-attestation-privacy"><s
     confusion in the specific context of this specification.</p>
    </ul>
    <h4 class="heading settled" data-level="14.4.2" id="sctn-pii-privacy"><span class="secno">14.4.2. </span><span class="content">Privacy of personally identifying information Stored in Authenticators</span><a class="self-link" href="#sctn-pii-privacy"></a></h4>
-   <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⑥">Authenticators</a> MAY provide additional information to <a data-link-type="dfn" href="#client" id="ref-for-client①①⓪">clients</a> outside what’s defined by this specification, e.g.,
-to enable the <a data-link-type="dfn" href="#client" id="ref-for-client①①①">client</a> to provide a rich UI with which the user can pick which <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②⑧">credential</a> to use for an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑦">authentication
+   <p><a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⑥">Authenticators</a> MAY provide additional information to <a data-link-type="dfn" href="#client" id="ref-for-client①①①">clients</a> outside what’s defined by this specification, e.g.,
+to enable the <a data-link-type="dfn" href="#client" id="ref-for-client①①②">client</a> to provide a rich UI with which the user can pick which <a data-link-type="dfn" href="https://w3c.github.io/webappsec-credential-management/#concept-credential" id="ref-for-concept-credential②⑧">credential</a> to use for an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑦">authentication
 ceremony</a>. If an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⑦">authenticator</a> chooses to do so, it SHOULD NOT expose personally identifying information unless successful <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑤⑨">user verification</a> has been
 performed. If the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⑧">authenticator</a> supports <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑥⓪">user verification</a> with more than one concurrently enrolled user, the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③②⑨">authenticator</a> SHOULD NOT expose personally identifying information of users other than the currently <a data-link-type="dfn" href="#concept-user-verified" id="ref-for-concept-user-verified④">verified</a> user. Consequently, an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⓪">authenticator</a> that is not capable of <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑥①">user verification</a> SHOULD NOT store personally identifying information.</p>
    <p>For the purposes of this discussion, the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑦">user handle</a> conveyed as the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialuserentity-id" id="ref-for-dom-publickeycredentialuserentity-id①⓪">id</a></code> member of <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialuserentity" id="ref-for-dictdef-publickeycredentialuserentity⑦">PublicKeyCredentialUserEntity</a></code> is not considered personally identifying information; see <a href="#sctn-user-handle-privacy">§ 14.6.1 User Handle Contents</a>.</p>
    <p>These recommendations serve to prevent an adversary with physical access to an <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③①">authenticator</a> from extracting personally identifying information about the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③②">authenticator</a>'s enrolled user(s).</p>
-   <h3 class="heading settled" data-level="14.5" id="sctn-privacy-considerations-client"><span class="secno">14.5. </span><span class="content">Privacy considerations for <a data-link-type="dfn" href="#client" id="ref-for-client①①②">clients</a></span><a class="self-link" href="#sctn-privacy-considerations-client"></a></h3>
+   <h3 class="heading settled" data-level="14.5" id="sctn-privacy-considerations-client"><span class="secno">14.5. </span><span class="content">Privacy considerations for <a data-link-type="dfn" href="#client" id="ref-for-client①①③">clients</a></span><a class="self-link" href="#sctn-privacy-considerations-client"></a></h3>
    <h4 class="heading settled" data-level="14.5.1" id="sctn-make-credential-privacy"><span class="secno">14.5.1. </span><span class="content">Registration Ceremony Privacy</span><a class="self-link" href="#sctn-make-credential-privacy"></a></h4>
    <p>In order to protect users from being identified without <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent②⑦">consent</a>, implementations of the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-create-slot" id="ref-for-dom-publickeycredential-create-slot①②">[[Create]](origin, options, sameOriginWithAncestors)</a></code> method need to take care to not leak information that
-could enable a malicious <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤③">WebAuthn Relying Party</a> to distinguish between these cases, where "excluded" means that at least one of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑤">credentials</a> listed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②③">Relying Party</a> in <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials③">excludeCredentials</a></code> is <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①⑦">bound</a> to the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③③">authenticator</a>:</p>
+could enable a malicious <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤③">WebAuthn Relying Party</a> to distinguish between these cases, where "excluded" means that at least one of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑤">credentials</a> listed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②④">Relying Party</a> in <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials③">excludeCredentials</a></code> is <a data-link-type="dfn" href="#bound-credential" id="ref-for-bound-credential①⑦">bound</a> to the <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③③">authenticator</a>:</p>
    <ul>
     <li data-md>
      <p>No <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③④">authenticators</a> are present.</p>
     <li data-md>
      <p>At least one <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑤">authenticator</a> is present, and at least one present <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑥">authenticator</a> is excluded.</p>
    </ul>
-   <p>If the above cases are distinguishable, information is leaked by which a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②④">Relying Party</a> could identify the user by probing for
+   <p>If the above cases are distinguishable, information is leaked by which a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑤">Relying Party</a> could identify the user by probing for
 which <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑥">credentials</a> are available. For example, one such information leak is if the client returns a
-failure response as soon as an excluded <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑦">authenticator</a> becomes available. In this case - especially if the excluded <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑧">authenticator</a> is a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③②">platform authenticator</a> - the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑤">Relying Party</a> could detect that the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①④">ceremony</a> was canceled before the
+failure response as soon as an excluded <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑦">authenticator</a> becomes available. In this case - especially if the excluded <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑧">authenticator</a> is a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③②">platform authenticator</a> - the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑥">Relying Party</a> could detect that the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①④">ceremony</a> was canceled before the
 timeout and before the user could feasibly have canceled it manually, and thus conclude that at least one of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑦">credentials</a> listed in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-excludecredentials" id="ref-for-dom-publickeycredentialcreationoptions-excludecredentials④">excludeCredentials</a></code> parameter is available to the user.</p>
    <p>The above is not a concern, however, if the user has <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent②⑧">consented</a> to create a new credential before a
 distinguishable error is returned, because in this case the user has confirmed intent to share the information that would be
 leaked.</p>
    <h4 class="heading settled" data-level="14.5.2" id="sctn-assertion-privacy"><span class="secno">14.5.2. </span><span class="content">Authentication Ceremony Privacy</span><a class="self-link" href="#sctn-assertion-privacy"></a></h4>
    <p>In order to protect users from being identified without <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent②⑨">consent</a>, implementations of the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredential-discoverfromexternalsource-slot" id="ref-for-dom-publickeycredential-discoverfromexternalsource-slot①④">[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</a></code> method need to take care to not
-leak information that could enable a malicious <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤④">WebAuthn Relying Party</a> to distinguish between these cases, where "named" means that the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑧">credential</a> is listed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑥">Relying Party</a> in <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑧">allowCredentials</a></code>:</p>
+leak information that could enable a malicious <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤④">WebAuthn Relying Party</a> to distinguish between these cases, where "named" means that the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑧">credential</a> is listed by the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑦">Relying Party</a> in <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑧">allowCredentials</a></code>:</p>
    <ul>
     <li data-md>
      <p>A named <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑦⑨">credential</a> is not available.</p>
     <li data-md>
      <p>A named <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑧⓪">credential</a> is available, but the user does not <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent③⓪">consent</a> to use it.</p>
    </ul>
-   <p>If the above cases are distinguishable, information is leaked by which a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑦">Relying Party</a> could identify the user by probing
+   <p>If the above cases are distinguishable, information is leaked by which a malicious <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑧">Relying Party</a> could identify the user by probing
 for which <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑧①">credentials</a> are available. For example, one such information leak is if the client returns a
 failure response as soon as the user denies <a data-link-type="dfn" href="#user-consent" id="ref-for-user-consent③①">consent</a> to proceed with an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑧">authentication ceremony</a>. In this
-case the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑧">Relying Party</a> could detect that the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑤">ceremony</a> was canceled by the user and not the timeout, and thus conclude that at least
+case the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑨">Relying Party</a> could detect that the <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑤">ceremony</a> was canceled by the user and not the timeout, and thus conclude that at least
 one of the <a data-link-type="dfn" href="#public-key-credential" id="ref-for-public-key-credential⑧②">credentials</a> listed in the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials②⑨">allowCredentials</a></code> parameter is
 available to the user.</p>
    <h4 class="heading settled" data-level="14.5.3" id="sctn-os-account-privacy"><span class="secno">14.5.3. </span><span class="content">Privacy Between Operating System Accounts</span><a class="self-link" href="#sctn-os-account-privacy"></a></h4>
    <p>If a <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③③">platform authenticator</a> is included in a <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④⑦">client device</a> with a multi-user operating system, the <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③④">platform
 authenticator</a> and <a data-link-type="dfn" href="#client-device" id="ref-for-client-device④⑧">client device</a> SHOULD work together to ensure that the existence of any <a data-link-type="dfn" href="#platform-credential" id="ref-for-platform-credential③">platform credential</a> is revealed
 only to the operating system user that created that <a data-link-type="dfn" href="#platform-credential" id="ref-for-platform-credential④">platform credential</a>.</p>
-   <h3 class="heading settled" data-level="14.6" id="sctn-privacy-considerations-rp"><span class="secno">14.6. </span><span class="content">Privacy considerations for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④②⑨">Relying Parties</a></span><a class="self-link" href="#sctn-privacy-considerations-rp"></a></h3>
+   <h3 class="heading settled" data-level="14.6" id="sctn-privacy-considerations-rp"><span class="secno">14.6. </span><span class="content">Privacy considerations for <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⓪">Relying Parties</a></span><a class="self-link" href="#sctn-privacy-considerations-rp"></a></h3>
    <h4 class="heading settled" data-level="14.6.1" id="sctn-user-handle-privacy"><span class="secno">14.6.1. </span><span class="content">User Handle Contents</span><a class="self-link" href="#sctn-user-handle-privacy"></a></h4>
    <p>Since the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑧">user handle</a> is not considered personally identifying information in <a href="#sctn-pii-privacy">§ 14.4.2 Privacy of personally identifying information Stored in Authenticators</a>,
 and since <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③③⑨">authenticators</a> MAY reveal <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle②⑨">user handles</a> without first performing <a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑥②">user verification</a>,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⓪">Relying Party</a> MUST NOT include personally identifying information, e.g., e-mail
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③①">Relying Party</a> MUST NOT include personally identifying information, e.g., e-mail
 addresses or usernames, in the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle③⓪">user handle</a>. This includes hash values of personally identifying information, unless the hash
-function is <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-258" id="ref-for-page-258">salted</a> with <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-258" id="ref-for-page-258①">salt</a> values private to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③①">Relying Party</a>, since hashing does not prevent probing for guessable input
-values. It is RECOMMENDED to let the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle③①">user handle</a> be 64 random bytes, and store this value in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④③">user account</a>.</p>
+function is <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-258" id="ref-for-page-258">salted</a> with <a data-link-type="dfn" href="https://tools.ietf.org/html/rfc4949#page-258" id="ref-for-page-258①">salt</a> values private to the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③②">Relying Party</a>, since hashing does not prevent probing for guessable input
+values. It is RECOMMENDED to let the <a data-link-type="dfn" href="#user-handle" id="ref-for-user-handle③①">user handle</a> be 64 random bytes, and store this value in the <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④④">user account</a>.</p>
    <h4 class="heading settled" data-level="14.6.2" id="sctn-username-enumeration"><span class="secno">14.6.2. </span><span class="content">Username Enumeration</span><a class="self-link" href="#sctn-username-enumeration"></a></h4>
    <p>While initiating a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⑧">registration</a> or <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony③⑨">authentication ceremony</a>, there is a risk that the <a data-link-type="dfn" href="#webauthn-relying-party" id="ref-for-webauthn-relying-party⑤⑤">WebAuthn Relying Party</a> might leak sensitive
-information about its registered users. For example, if a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③②">Relying Party</a> uses e-mail addresses as usernames and an attacker attempts to
-initiate an <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑧">authentication</a> <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑥">ceremony</a> for "alex.mueller@example.com" and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③③">Relying Party</a> responds with a failure, but then
+information about its registered users. For example, if a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③③">Relying Party</a> uses e-mail addresses as usernames and an attacker attempts to
+initiate an <a data-link-type="dfn" href="#authentication" id="ref-for-authentication①⑧">authentication</a> <a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑥">ceremony</a> for "alex.mueller@example.com" and the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③④">Relying Party</a> responds with a failure, but then
 successfully initiates an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④⓪">authentication ceremony</a> for "j.doe@example.com", then the attacker can conclude that "j.doe@example.com"
-is registered and "alex.mueller@example.com" is not. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③④">Relying Party</a> has thus leaked the possibly sensitive information that
-"j.doe@example.com" has a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④④">user account</a> at this <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑤">Relying Party</a>.</p>
-   <p>The following is a non-normative, non-exhaustive list of measures the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑥">Relying Party</a> may implement to mitigate or prevent information
+is registered and "alex.mueller@example.com" is not. The <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑤">Relying Party</a> has thus leaked the possibly sensitive information that
+"j.doe@example.com" has a <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④⑤">user account</a> at this <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑥">Relying Party</a>.</p>
+   <p>The following is a non-normative, non-exhaustive list of measures the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑦">Relying Party</a> may implement to mitigate or prevent information
 leakage due to such an attack:</p>
    <ul>
     <li data-md>
      <p>For <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony①⑨">registration ceremonies</a>:</p>
      <ul>
       <li data-md>
-       <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑦">Relying Party</a> uses <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑧">Relying Party</a>-specific usernames to identify users:</p>
+       <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑧">Relying Party</a> uses <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑨">Relying Party</a>-specific usernames to identify users:</p>
        <ul>
         <li data-md>
          <p>When initiating a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②⓪">registration ceremony</a>, disallow registration of usernames that are syntactically valid e-mail
 addresses.</p>
-         <p class="note" role="note"><span class="marker">Note:</span> The motivation for this suggestion is that in this case the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④③⑨">Relying Party</a> probably has no choice but to fail the <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②①">registration ceremony</a> if the user attempts to register a username that is already registered, and an information
+         <p class="note" role="note"><span class="marker">Note:</span> The motivation for this suggestion is that in this case the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⓪">Relying Party</a> probably has no choice but to fail the <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②①">registration ceremony</a> if the user attempts to register a username that is already registered, and an information
 leak might therefore be unavoidable. By disallowing e-mail addresses as usernames, the impact of the leakage can be
-mitigated since it will be less likely that a user has the same username at this <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⓪">Relying Party</a> as at other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④①">Relying Parties</a>.</p>
+mitigated since it will be less likely that a user has the same username at this <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④①">Relying Party</a> as at other <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④②">Relying Parties</a>.</p>
        </ul>
       <li data-md>
-       <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④②">Relying Party</a> uses e-mail addresses to identify users:</p>
+       <p>If the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④③">Relying Party</a> uses e-mail addresses to identify users:</p>
        <ul>
         <li data-md>
          <p>When initiating a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②②">registration ceremony</a>, interrupt the user interaction after the e-mail address is supplied and
@@ -8743,11 +8750,11 @@ <h4 class="heading settled" data-level="14.6.2" id="sctn-username-enumeration"><
      <p>For <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④①">authentication ceremonies</a>:</p>
      <ul>
       <li data-md>
-       <p>If, when initiating an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④②">authentication ceremony</a>, there is no <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④⑤">user account</a> matching the provided username, continue the
+       <p>If, when initiating an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④②">authentication ceremony</a>, there is no <a data-link-type="dfn" href="#user-account" id="ref-for-user-account④⑥">user account</a> matching the provided username, continue the
 ceremony by invoking <code class="idl"><a data-link-type="idl" href="https://w3c.github.io/webappsec-credential-management/#dom-credentialscontainer-get" id="ref-for-dom-credentialscontainer-get④⑥">navigator.credentials.get()</a></code> using a syntactically valid <code class="idl"><a data-link-type="idl" href="#dictdef-publickeycredentialrequestoptions" id="ref-for-dictdef-publickeycredentialrequestoptions①⑤">PublicKeyCredentialRequestOptions</a></code> object that is populated with plausible imaginary values.</p>
        <p>This approach could also be used to mitigate information leakage via <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③⓪">allowCredentials</a></code>;
 see <a href="#sctn-unprotected-account-detection">§ 13.4.7 Unprotected account detection</a> and <a href="#sctn-credential-id-privacy-leak">§ 14.6.3 Privacy leak via credential IDs</a>.</p>
-       <p class="note" role="note"><span class="marker">Note:</span> The username may be "provided" in various <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④③">Relying Party</a>-specific fashions: login form, session cookie, etc.</p>
+       <p class="note" role="note"><span class="marker">Note:</span> The username may be "provided" in various <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④④">Relying Party</a>-specific fashions: login form, session cookie, etc.</p>
        <p class="note" role="note"><span class="marker">Note:</span> If returned imaginary values noticeably differ from actual ones, clever attackers may be able to discern them and
     thus be able to test for existence of actual accounts. Examples of noticeably different values include if the values
     are always the same for all username inputs, or are different in repeated attempts with the same username input. The <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③①">allowCredentials</a></code> member could therefore be populated with pseudo-random values
@@ -8764,17 +8771,17 @@ <h4 class="heading settled" data-level="14.6.2" id="sctn-username-enumeration"><
    </ul>
    <h4 class="heading settled" data-level="14.6.3" id="sctn-credential-id-privacy-leak"><span class="secno">14.6.3. </span><span class="content">Privacy leak via credential IDs</span><a class="self-link" href="#sctn-credential-id-privacy-leak"></a></h4>
    <p><em>This section is not normative.</em></p>
-   <p>This privacy consideration applies to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④④">Relying Parties</a> that support <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④④">authentication ceremonies</a> with a non-<a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty①②">empty</a> <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③②">allowCredentials</a></code> argument as the first authentication step.
+   <p>This privacy consideration applies to <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑤">Relying Parties</a> that support <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④④">authentication ceremonies</a> with a non-<a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-empty" id="ref-for-list-empty①②">empty</a> <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③②">allowCredentials</a></code> argument as the first authentication step.
 For example, if using authentication with <a data-link-type="dfn" href="#server-side-credential" id="ref-for-server-side-credential①⑥">server-side credentials</a> as the first authentication step.</p>
    <p>In this case the <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③③">allowCredentials</a></code> argument risks leaking personally identifying information,
-since it exposes the user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑨">credential IDs</a> to an unauthenticated caller. <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤⓪">Credential IDs</a> are designed to not be correlatable between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑤">Relying Parties</a>,
+since it exposes the user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id④⑨">credential IDs</a> to an unauthenticated caller. <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤⓪">Credential IDs</a> are designed to not be correlatable between <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑥">Relying Parties</a>,
 but the length of a <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤①">credential ID</a> might be a hint as to what type of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③④①">authenticator</a> created it.
-It is likely that a user will use the same username and set of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③④②">authenticators</a> for several <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑥">Relying Parties</a>,
+It is likely that a user will use the same username and set of <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③④②">authenticators</a> for several <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑦">Relying Parties</a>,
 so the number of <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤②">credential IDs</a> in <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③④">allowCredentials</a></code> and their lengths
 might serve as a global correlation handle to de-anonymize the user.
 Knowing a user’s <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤③">credential IDs</a> also makes it possible to confirm guesses about the user’s identity
 given only momentary physical access to one of the user’s <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③④③">authenticators</a>.</p>
-   <p>In order to prevent such information leakage, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑦">Relying Party</a> could for example:</p>
+   <p>In order to prevent such information leakage, the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑧">Relying Party</a> could for example:</p>
    <ul>
     <li data-md>
      <p>Perform a separate authentication step,
@@ -8786,11 +8793,11 @@ <h4 class="heading settled" data-level="14.6.3" id="sctn-credential-id-privacy-l
    </ul>
    <p>If the above prevention measures are not available,
 i.e., if <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-allowcredentials" id="ref-for-dom-publickeycredentialrequestoptions-allowcredentials③⑥">allowCredentials</a></code> needs to be exposed given only a username,
-the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑧">Relying Party</a> could mitigate the privacy leak using the same approach of returning imaginary <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤⑤">credential IDs</a> as discussed in <a href="#sctn-username-enumeration">§ 14.6.2 Username Enumeration</a>.</p>
+the <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑨">Relying Party</a> could mitigate the privacy leak using the same approach of returning imaginary <a data-link-type="dfn" href="#credential-id" id="ref-for-credential-id⑤⑤">credential IDs</a> as discussed in <a href="#sctn-username-enumeration">§ 14.6.2 Username Enumeration</a>.</p>
    <h2 class="heading settled" data-level="15" id="sctn-accessiblility-considerations"><span class="secno">15. </span><span class="content">Accessibility Considerations</span><a class="self-link" href="#sctn-accessiblility-considerations"></a></h2>
    <p><a data-link-type="dfn" href="#user-verification" id="ref-for-user-verification⑥③">User verification</a>-capable <a data-link-type="dfn" href="#authenticator" id="ref-for-authenticator③④④">authenticators</a>, whether <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②⑥">roaming</a> or <a data-link-type="dfn" href="#platform-authenticators" id="ref-for-platform-authenticators③⑤">platform</a>, should offer users more than one user verification method.  For example, both fingerprint sensing and PIN entry. This allows for fallback to other user verification means if the selected one is not working for some reason. Note that in the case of <a data-link-type="dfn" href="#roaming-authenticators" id="ref-for-roaming-authenticators②⑦">roaming authenticators</a>, the authenticator and platform might work together to provide a user verification method such as PIN entry <a data-link-type="biblio" href="#biblio-fido-ctap" title="Client to Authenticator Protocol (CTAP)">[FIDO-CTAP]</a>.</p>
-   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④④⑨">Relying Parties</a>, at <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑦">registration</a> time, SHOULD provide affordances for users to complete future <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture③⓪">authorization gestures</a> correctly. This could involve naming the authenticator, choosing a picture to associate with the device, or entering freeform text instructions (e.g., as a reminder-to-self).</p>
-   <p><a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑧">Ceremonies</a> relying on timing, e.g., a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②③">registration ceremony</a> (see <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-timeout" id="ref-for-dom-publickeycredentialcreationoptions-timeout④">timeout</a></code>) or an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④⑥">authentication ceremony</a> (see <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-timeout" id="ref-for-dom-publickeycredentialrequestoptions-timeout④">timeout</a></code>), ought to follow <a data-link-type="biblio" href="#biblio-wcag21" title="Web Content Accessibility Guidelines (WCAG) 2.1">[WCAG21]</a>'s <a href="https://www.w3.org/TR/WCAG21/#enough-time">Guideline 2.2 Enough Time</a>. If a <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑦">client platform</a> determines that a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⑤⓪">Relying Party</a>-supplied timeout does not appropriately adhere to the latter <a data-link-type="biblio" href="#biblio-wcag21" title="Web Content Accessibility Guidelines (WCAG) 2.1">[WCAG21]</a> guidelines, then the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑧">client platform</a> MAY adjust the timeout accordingly.</p>
+   <p><a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⑤⓪">Relying Parties</a>, at <a data-link-type="dfn" href="#registration" id="ref-for-registration②⑦">registration</a> time, SHOULD provide affordances for users to complete future <a data-link-type="dfn" href="#authorization-gesture" id="ref-for-authorization-gesture③⓪">authorization gestures</a> correctly. This could involve naming the authenticator, choosing a picture to associate with the device, or entering freeform text instructions (e.g., as a reminder-to-self).</p>
+   <p><a data-link-type="dfn" href="#ceremony" id="ref-for-ceremony①⑧">Ceremonies</a> relying on timing, e.g., a <a data-link-type="dfn" href="#registration-ceremony" id="ref-for-registration-ceremony②③">registration ceremony</a> (see <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialcreationoptions-timeout" id="ref-for-dom-publickeycredentialcreationoptions-timeout④">timeout</a></code>) or an <a data-link-type="dfn" href="#authentication-ceremony" id="ref-for-authentication-ceremony④⑥">authentication ceremony</a> (see <code class="idl"><a data-link-type="idl" href="#dom-publickeycredentialrequestoptions-timeout" id="ref-for-dom-publickeycredentialrequestoptions-timeout④">timeout</a></code>), ought to follow <a data-link-type="biblio" href="#biblio-wcag21" title="Web Content Accessibility Guidelines (WCAG) 2.1">[WCAG21]</a>'s <a href="https://www.w3.org/TR/WCAG21/#enough-time">Guideline 2.2 Enough Time</a>. If a <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑦">client platform</a> determines that a <a data-link-type="dfn" href="#relying-party" id="ref-for-relying-party④⑤①">Relying Party</a>-supplied timeout does not appropriately adhere to the latter <a data-link-type="biblio" href="#biblio-wcag21" title="Web Content Accessibility Guidelines (WCAG) 2.1">[WCAG21]</a> guidelines, then the <a data-link-type="dfn" href="#client-platform" id="ref-for-client-platform⑤⑧">client platform</a> MAY adjust the timeout accordingly.</p>
    <h2 class="heading settled" data-level="16" id="sctn-acknowledgements"><span class="secno">16. </span><span class="content">Acknowledgements</span><a class="self-link" href="#sctn-acknowledgements"></a></h2>
     We thank the following people for their reviews of, and contributions to, this specification:
 Yuriy Ackermann,
@@ -11147,7 +11154,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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@@ -11184,7 +11191,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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Credential Descriptor (dictionary PublicKeyCredentialDescriptor)"}, {"refs": [{"id": "ref-for-public-key-credential\u2462\u2468"}], "title": "5.8.4. Authenticator Transport Enumeration (enum AuthenticatorTransport)"}, {"refs": [{"id": "ref-for-public-key-credential\u2463\u24ea"}, {"id": "ref-for-public-key-credential\u2463\u2460"}], "title": "6. WebAuthn Authenticator Model"}, {"refs": [{"id": "ref-for-public-key-credential\u2463\u2461"}, {"id": "ref-for-public-key-credential\u2463\u2462"}], "title": "6.1. Authenticator Data"}, {"refs": [{"id": "ref-for-public-key-credential\u2463\u2463"}, {"id": "ref-for-public-key-credential\u2463\u2464"}, {"id": "ref-for-public-key-credential\u2463\u2465"}], "title": "6.2.1. Authenticator Attachment Modality"}, {"refs": [{"id": "ref-for-public-key-credential\u2463\u2466"}], "title": "6.2.2. Credential Storage Modality"}, {"refs": [{"id": "ref-for-public-key-credential\u2463\u2467"}], "title": "6.3.3. 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Attestation Limitations"}, {"refs": [{"id": "ref-for-public-key-credential\u2464\u2468"}, {"id": "ref-for-public-key-credential\u2465\u24ea"}], "title": "13.4.5. Revoked Attestation Certificates"}, {"refs": [{"id": "ref-for-public-key-credential\u2465\u2460"}, {"id": "ref-for-public-key-credential\u2465\u2461"}, {"id": "ref-for-public-key-credential\u2465\u2462"}, {"id": "ref-for-public-key-credential\u2465\u2463"}, {"id": "ref-for-public-key-credential\u2465\u2464"}], "title": "13.4.6. Credential Loss and Key Mobility"}, {"refs": [{"id": "ref-for-public-key-credential\u2465\u2465"}, {"id": "ref-for-public-key-credential\u2465\u2466"}], "title": "13.4.8. Code injection attacks"}, {"refs": [{"id": "ref-for-public-key-credential\u2465\u2467"}, {"id": "ref-for-public-key-credential\u2465\u2468"}, {"id": "ref-for-public-key-credential\u2466\u24ea"}, {"id": "ref-for-public-key-credential\u2466\u2460"}, {"id": "ref-for-public-key-credential\u2466\u2461"}, {"id": "ref-for-public-key-credential\u2466\u2462"}], "title": "14.2. Anonymous, Scoped, Non-correlatable Public Key Credentials"}, {"refs": [{"id": "ref-for-public-key-credential\u2466\u2463"}], "title": "14.3. Authenticator-local Biometric Recognition"}, {"refs": [{"id": "ref-for-public-key-credential\u2466\u2464"}, {"id": "ref-for-public-key-credential\u2466\u2465"}, {"id": "ref-for-public-key-credential\u2466\u2466"}], "title": "14.5.1. 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Terminology"}, {"refs": [{"id": "ref-for-public-key-credential-source\u2462\u2468"}], "title": "5.1.3. Create a New Credential - PublicKeyCredential\u2019s [[Create]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-public-key-credential-source\u2463\u24ea"}, {"id": "ref-for-public-key-credential-source\u2463\u2460"}, {"id": "ref-for-public-key-credential-source\u2463\u2461"}, {"id": "ref-for-public-key-credential-source\u2463\u2462"}, {"id": "ref-for-public-key-credential-source\u2463\u2463"}], "title": "5.1.4. Use an Existing Credential to Make an Assertion - PublicKeyCredential\u2019s [[Get]](options) Method"}, {"refs": [{"id": "ref-for-public-key-credential-source\u2463\u2464"}], "title": "6. 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@@ -11199,7 +11206,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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The authenticatorGetAssertion Operation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2463"}], "title": "6.4. String Handling"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2464"}, {"id": "ref-for-relying-party\u2461\u2461\u2465"}], "title": "6.4.1. String Truncation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2466"}, {"id": "ref-for-relying-party\u2461\u2461\u2467"}, {"id": "ref-for-relying-party\u2461\u2461\u2468"}, {"id": "ref-for-relying-party\u2461\u2462\u24ea"}, {"id": "ref-for-relying-party\u2461\u2462\u2460"}, {"id": "ref-for-relying-party\u2461\u2462\u2461"}, {"id": "ref-for-relying-party\u2461\u2462\u2462"}, {"id": "ref-for-relying-party\u2461\u2462\u2463"}], "title": "6.5. Attestation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2462\u2464"}, {"id": "ref-for-relying-party\u2461\u2462\u2465"}], "title": "6.5.1. 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Privacy leak via credential IDs"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2463\u2468"}, {"id": "ref-for-relying-party\u2463\u2464\u24ea"}], "title": "15. Accessibility Considerations"}], "external": false};
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New Device Registration"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2466"}], "title": "1.2.4. Other Use Cases and Configurations"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2467"}, {"id": "ref-for-relying-party\u2460\u2468"}, {"id": "ref-for-relying-party\u2461\u24ea"}, {"id": "ref-for-relying-party\u2461\u2460"}], "title": "1.3.1. Registration"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461"}, {"id": "ref-for-relying-party\u2461\u2462"}, {"id": "ref-for-relying-party\u2461\u2463"}], "title": "1.3.2. Registration Specifically with User-Verifying Platform Authenticator"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2464"}, {"id": "ref-for-relying-party\u2461\u2465"}, {"id": "ref-for-relying-party\u2461\u2466"}, {"id": "ref-for-relying-party\u2461\u2467"}, {"id": "ref-for-relying-party\u2461\u2468"}], "title": "1.3.3. Authentication"}, {"refs": [{"id": "ref-for-relying-party\u2462\u24ea"}, {"id": "ref-for-relying-party\u2462\u2460"}], "title": "1.3.5. Decommissioning"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2461"}], "title": "2.1.1. Enumerations as DOMString types"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2462"}, {"id": "ref-for-relying-party\u2462\u2463"}, {"id": "ref-for-relying-party\u2462\u2464"}, {"id": "ref-for-relying-party\u2462\u2465"}, {"id": "ref-for-relying-party\u2462\u2466"}, {"id": "ref-for-relying-party\u2462\u2467"}, {"id": "ref-for-relying-party\u2462\u2468"}, {"id": "ref-for-relying-party\u2463\u24ea"}, {"id": "ref-for-relying-party\u2463\u2460"}, {"id": "ref-for-relying-party\u2463\u2461"}, {"id": "ref-for-relying-party\u2463\u2462"}, {"id": "ref-for-relying-party\u2463\u2463"}, {"id": "ref-for-relying-party\u2463\u2464"}, {"id": "ref-for-relying-party\u2463\u2465"}, {"id": "ref-for-relying-party\u2463\u2466"}, {"id": "ref-for-relying-party\u2463\u2467"}, {"id": "ref-for-relying-party\u2463\u2468"}, {"id": "ref-for-relying-party\u2464\u24ea"}, {"id": "ref-for-relying-party\u2464\u2460"}, {"id": "ref-for-relying-party\u2464\u2461"}, {"id": "ref-for-relying-party\u2464\u2462"}, {"id": "ref-for-relying-party\u2464\u2463"}, {"id": "ref-for-relying-party\u2464\u2464"}, {"id": "ref-for-relying-party\u2464\u2465"}, {"id": "ref-for-relying-party\u2464\u2466"}, {"id": "ref-for-relying-party\u2464\u2467"}, {"id": "ref-for-relying-party\u2464\u2468"}, {"id": "ref-for-relying-party\u2465\u24ea"}, {"id": "ref-for-relying-party\u2465\u2460"}, {"id": "ref-for-relying-party\u2465\u2461"}, {"id": "ref-for-relying-party\u2465\u2462"}, {"id": "ref-for-relying-party\u2465\u2463"}, {"id": "ref-for-relying-party\u2465\u2464"}, {"id": "ref-for-relying-party\u2465\u2465"}, {"id": "ref-for-relying-party\u2465\u2466"}, {"id": "ref-for-relying-party\u2465\u2467"}, {"id": "ref-for-relying-party\u2465\u2468"}, {"id": "ref-for-relying-party\u2466\u24ea"}, {"id": "ref-for-relying-party\u2466\u2460"}, {"id": "ref-for-relying-party\u2466\u2461"}, {"id": "ref-for-relying-party\u2466\u2462"}, {"id": "ref-for-relying-party\u2466\u2463"}, {"id": "ref-for-relying-party\u2466\u2464"}, {"id": "ref-for-relying-party\u2466\u2465"}, {"id": "ref-for-relying-party\u2466\u2466"}, {"id": "ref-for-relying-party\u2466\u2467"}, {"id": "ref-for-relying-party\u2466\u2468"}, {"id": "ref-for-relying-party\u2467\u24ea"}, {"id": "ref-for-relying-party\u2467\u2460"}, {"id": "ref-for-relying-party\u2467\u2461"}], "title": "4. Terminology"}, {"refs": [{"id": "ref-for-relying-party\u2467\u2462"}, {"id": "ref-for-relying-party\u2467\u2463"}, {"id": "ref-for-relying-party\u2467\u2464"}, {"id": "ref-for-relying-party\u2467\u2465"}, {"id": "ref-for-relying-party\u2467\u2466"}, {"id": "ref-for-relying-party\u2467\u2467"}, {"id": "ref-for-relying-party\u2467\u2468"}], "title": "5. Web Authentication API"}, {"refs": [{"id": "ref-for-relying-party\u2468\u24ea"}, {"id": "ref-for-relying-party\u2468\u2460"}, {"id": "ref-for-relying-party\u2468\u2461"}, {"id": "ref-for-relying-party\u2468\u2462"}, {"id": "ref-for-relying-party\u2468\u2463"}], "title": "5.1. PublicKeyCredential Interface"}, {"refs": [{"id": "ref-for-relying-party\u2468\u2464"}, {"id": "ref-for-relying-party\u2468\u2465"}, {"id": "ref-for-relying-party\u2468\u2466"}, {"id": "ref-for-relying-party\u2468\u2467"}], "title": "5.1.3. 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Availability of a passkey platform authenticator - PublicKeyCredential\u2019s isPasskeyPlatformAuthenticatorAvailable() Method"}, {"refs": [{"id": "ref-for-relying-party\u2460\u24ea\u2466"}], "title": "5.2. Authenticator Responses (interface AuthenticatorResponse)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u24ea\u2467"}, {"id": "ref-for-relying-party\u2460\u24ea\u2468"}], "title": "5.2.1. Information About Public Key Credential (interface AuthenticatorAttestationResponse)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2460\u24ea"}, {"id": "ref-for-relying-party\u2460\u2460\u2460"}, {"id": "ref-for-relying-party\u2460\u2460\u2461"}, {"id": "ref-for-relying-party\u2460\u2460\u2462"}, {"id": "ref-for-relying-party\u2460\u2460\u2463"}, {"id": "ref-for-relying-party\u2460\u2460\u2464"}, {"id": "ref-for-relying-party\u2460\u2460\u2465"}], "title": "5.2.1.1. Easily accessing credential data"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2460\u2466"}, {"id": "ref-for-relying-party\u2460\u2460\u2467"}, {"id": "ref-for-relying-party\u2460\u2460\u2468"}, {"id": "ref-for-relying-party\u2460\u2461\u24ea"}, {"id": "ref-for-relying-party\u2460\u2461\u2460"}, {"id": "ref-for-relying-party\u2460\u2461\u2461"}, {"id": "ref-for-relying-party\u2460\u2461\u2462"}, {"id": "ref-for-relying-party\u2460\u2461\u2463"}, {"id": "ref-for-relying-party\u2460\u2461\u2464"}, {"id": "ref-for-relying-party\u2460\u2461\u2465"}, {"id": "ref-for-relying-party\u2460\u2461\u2466"}], "title": "5.4. Options for Credential Creation (dictionary PublicKeyCredentialCreationOptions)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2461\u2467"}, {"id": "ref-for-relying-party\u2460\u2461\u2468"}, {"id": "ref-for-relying-party\u2460\u2462\u24ea"}, {"id": "ref-for-relying-party\u2460\u2462\u2460"}, {"id": "ref-for-relying-party\u2460\u2462\u2461"}, {"id": "ref-for-relying-party\u2460\u2462\u2462"}], "title": "5.4.1. Public Key Entity Description (dictionary PublicKeyCredentialEntity)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2462\u2463"}, {"id": "ref-for-relying-party\u2460\u2462\u2464"}], "title": "5.4.2. Relying Party Parameters for Credential Generation (dictionary PublicKeyCredentialRpEntity)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2462\u2465"}, {"id": "ref-for-relying-party\u2460\u2462\u2466"}, {"id": "ref-for-relying-party\u2460\u2462\u2467"}, {"id": "ref-for-relying-party\u2460\u2462\u2468"}, {"id": "ref-for-relying-party\u2460\u2463\u24ea"}], "title": "5.4.3. User Account Parameters for Credential Generation (dictionary PublicKeyCredentialUserEntity)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2463\u2460"}, {"id": "ref-for-relying-party\u2460\u2463\u2461"}, {"id": "ref-for-relying-party\u2460\u2463\u2462"}], "title": "5.4.4. Authenticator Selection Criteria (dictionary AuthenticatorSelectionCriteria)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2463\u2463"}, {"id": "ref-for-relying-party\u2460\u2463\u2464"}, {"id": "ref-for-relying-party\u2460\u2463\u2465"}], "title": "5.4.5. Authenticator Attachment Enumeration (enum AuthenticatorAttachment)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2463\u2466"}, {"id": "ref-for-relying-party\u2460\u2463\u2467"}, {"id": "ref-for-relying-party\u2460\u2463\u2468"}, {"id": "ref-for-relying-party\u2460\u2464\u24ea"}, {"id": "ref-for-relying-party\u2460\u2464\u2460"}, {"id": "ref-for-relying-party\u2460\u2464\u2461"}], "title": "5.4.6. Resident Key Requirement Enumeration (enum ResidentKeyRequirement)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2464\u2462"}, {"id": "ref-for-relying-party\u2460\u2464\u2463"}, {"id": "ref-for-relying-party\u2460\u2464\u2464"}, {"id": "ref-for-relying-party\u2460\u2464\u2465"}, {"id": "ref-for-relying-party\u2460\u2464\u2466"}, {"id": "ref-for-relying-party\u2460\u2464\u2467"}, {"id": "ref-for-relying-party\u2460\u2464\u2468"}, {"id": "ref-for-relying-party\u2460\u2465\u24ea"}], "title": "5.4.7. Attestation Conveyance Preference Enumeration (enum AttestationConveyancePreference)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2465\u2460"}, {"id": "ref-for-relying-party\u2460\u2465\u2461"}, {"id": "ref-for-relying-party\u2460\u2465\u2462"}, {"id": "ref-for-relying-party\u2460\u2465\u2463"}, {"id": "ref-for-relying-party\u2460\u2465\u2464"}, {"id": "ref-for-relying-party\u2460\u2465\u2465"}, {"id": "ref-for-relying-party\u2460\u2465\u2466"}, {"id": "ref-for-relying-party\u2460\u2465\u2467"}, {"id": "ref-for-relying-party\u2460\u2465\u2468"}, {"id": "ref-for-relying-party\u2460\u2466\u24ea"}, {"id": "ref-for-relying-party\u2460\u2466\u2460"}], "title": "5.5. Options for Assertion Generation (dictionary PublicKeyCredentialRequestOptions)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2466\u2461"}], "title": "5.7.3. Authentication Extensions Authenticator Inputs (CDDL type AuthenticationExtensionsAuthenticatorInputs)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2466\u2462"}, {"id": "ref-for-relying-party\u2460\u2466\u2463"}, {"id": "ref-for-relying-party\u2460\u2466\u2464"}, {"id": "ref-for-relying-party\u2460\u2466\u2465"}, {"id": "ref-for-relying-party\u2460\u2466\u2466"}], "title": "5.8.1. Client Data Used in WebAuthn Signatures (dictionary CollectedClientData)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2466\u2467"}, {"id": "ref-for-relying-party\u2460\u2466\u2468"}], "title": "5.8.3. Credential Descriptor (dictionary PublicKeyCredentialDescriptor)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2467\u24ea"}], "title": "5.8.4. Authenticator Transport Enumeration (enum AuthenticatorTransport)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2467\u2460"}, {"id": "ref-for-relying-party\u2460\u2467\u2461"}, {"id": "ref-for-relying-party\u2460\u2467\u2462"}], "title": "5.8.6. User Verification Requirement Enumeration (enum UserVerificationRequirement)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2467\u2463"}, {"id": "ref-for-relying-party\u2460\u2467\u2464"}, {"id": "ref-for-relying-party\u2460\u2467\u2465"}, {"id": "ref-for-relying-party\u2460\u2467\u2466"}, {"id": "ref-for-relying-party\u2460\u2467\u2467"}, {"id": "ref-for-relying-party\u2460\u2467\u2468"}, {"id": "ref-for-relying-party\u2460\u2468\u24ea"}], "title": "5.8.7. User-agent Hints Enumeration (enum PublicKeyCredentialHints)"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2468\u2460"}], "title": "5.10. Using Web Authentication within iframe elements"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2468\u2461"}, {"id": "ref-for-relying-party\u2460\u2468\u2462"}, {"id": "ref-for-relying-party\u2460\u2468\u2463"}, {"id": "ref-for-relying-party\u2460\u2468\u2464"}], "title": "6. WebAuthn Authenticator Model"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2468\u2465"}], "title": "6.1. Authenticator Data"}, {"refs": [{"id": "ref-for-relying-party\u2460\u2468\u2466"}, {"id": "ref-for-relying-party\u2460\u2468\u2467"}, {"id": "ref-for-relying-party\u2460\u2468\u2468"}, {"id": "ref-for-relying-party\u2461\u24ea\u24ea"}, {"id": "ref-for-relying-party\u2461\u24ea\u2460"}], "title": "6.1.1. Signature Counter Considerations"}, {"refs": [{"id": "ref-for-relying-party\u2461\u24ea\u2461"}, {"id": "ref-for-relying-party\u2461\u24ea\u2462"}, {"id": "ref-for-relying-party\u2461\u24ea\u2463"}, {"id": "ref-for-relying-party\u2461\u24ea\u2464"}, {"id": "ref-for-relying-party\u2461\u24ea\u2465"}], "title": "6.1.3. Credential Backup State"}, {"refs": [{"id": "ref-for-relying-party\u2461\u24ea\u2466"}], "title": "6.2. Authenticator Taxonomy"}, {"refs": [{"id": "ref-for-relying-party\u2461\u24ea\u2467"}, {"id": "ref-for-relying-party\u2461\u24ea\u2468"}, {"id": "ref-for-relying-party\u2461\u2460\u24ea"}], "title": "6.2.2. 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The authenticatorGetAssertion Operation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2464"}], "title": "6.4. String Handling"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2465"}, {"id": "ref-for-relying-party\u2461\u2461\u2466"}], "title": "6.4.1. String Truncation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2461\u2467"}, {"id": "ref-for-relying-party\u2461\u2461\u2468"}, {"id": "ref-for-relying-party\u2461\u2462\u24ea"}, {"id": "ref-for-relying-party\u2461\u2462\u2460"}, {"id": "ref-for-relying-party\u2461\u2462\u2461"}, {"id": "ref-for-relying-party\u2461\u2462\u2462"}, {"id": "ref-for-relying-party\u2461\u2462\u2463"}, {"id": "ref-for-relying-party\u2461\u2462\u2464"}], "title": "6.5. Attestation"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2462\u2465"}, {"id": "ref-for-relying-party\u2461\u2462\u2466"}], "title": "6.5.1. Attestation in assertions"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2462\u2467"}, {"id": "ref-for-relying-party\u2461\u2462\u2468"}, {"id": "ref-for-relying-party\u2461\u2463\u24ea"}, {"id": "ref-for-relying-party\u2461\u2463\u2460"}, {"id": "ref-for-relying-party\u2461\u2463\u2461"}], "title": "6.5.4. Attestation Types"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2463\u2462"}, {"id": "ref-for-relying-party\u2461\u2463\u2463"}, {"id": "ref-for-relying-party\u2461\u2463\u2464"}, {"id": "ref-for-relying-party\u2461\u2463\u2465"}], "title": "7. WebAuthn Relying Party Operations"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2463\u2466"}, {"id": "ref-for-relying-party\u2461\u2463\u2467"}, {"id": "ref-for-relying-party\u2461\u2463\u2468"}, {"id": "ref-for-relying-party\u2461\u2464\u24ea"}, {"id": "ref-for-relying-party\u2461\u2464\u2460"}, {"id": "ref-for-relying-party\u2461\u2464\u2461"}, {"id": "ref-for-relying-party\u2461\u2464\u2462"}, {"id": "ref-for-relying-party\u2461\u2464\u2463"}, {"id": "ref-for-relying-party\u2461\u2464\u2464"}, {"id": "ref-for-relying-party\u2461\u2464\u2465"}, {"id": "ref-for-relying-party\u2461\u2464\u2466"}, {"id": "ref-for-relying-party\u2461\u2464\u2467"}, {"id": "ref-for-relying-party\u2461\u2464\u2468"}, {"id": "ref-for-relying-party\u2461\u2465\u24ea"}, {"id": "ref-for-relying-party\u2461\u2465\u2460"}, {"id": "ref-for-relying-party\u2461\u2465\u2461"}, {"id": "ref-for-relying-party\u2461\u2465\u2462"}, {"id": "ref-for-relying-party\u2461\u2465\u2463"}, {"id": "ref-for-relying-party\u2461\u2465\u2464"}, {"id": "ref-for-relying-party\u2461\u2465\u2465"}, {"id": "ref-for-relying-party\u2461\u2465\u2466"}, {"id": "ref-for-relying-party\u2461\u2465\u2467"}, {"id": "ref-for-relying-party\u2461\u2465\u2468"}, {"id": "ref-for-relying-party\u2461\u2466\u24ea"}, {"id": "ref-for-relying-party\u2461\u2466\u2460"}, {"id": "ref-for-relying-party\u2461\u2466\u2461"}], "title": "7.1. Registering a New Credential"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2466\u2462"}, {"id": "ref-for-relying-party\u2461\u2466\u2463"}, {"id": "ref-for-relying-party\u2461\u2466\u2464"}, {"id": "ref-for-relying-party\u2461\u2466\u2465"}, {"id": "ref-for-relying-party\u2461\u2466\u2466"}, {"id": "ref-for-relying-party\u2461\u2466\u2467"}, {"id": "ref-for-relying-party\u2461\u2466\u2468"}, {"id": "ref-for-relying-party\u2461\u2467\u24ea"}, {"id": "ref-for-relying-party\u2461\u2467\u2460"}, {"id": "ref-for-relying-party\u2461\u2467\u2461"}, {"id": "ref-for-relying-party\u2461\u2467\u2462"}, {"id": "ref-for-relying-party\u2461\u2467\u2463"}, {"id": "ref-for-relying-party\u2461\u2467\u2464"}, {"id": "ref-for-relying-party\u2461\u2467\u2465"}, {"id": "ref-for-relying-party\u2461\u2467\u2466"}, {"id": "ref-for-relying-party\u2461\u2467\u2467"}, {"id": "ref-for-relying-party\u2461\u2467\u2468"}, {"id": "ref-for-relying-party\u2461\u2468\u24ea"}, {"id": "ref-for-relying-party\u2461\u2468\u2460"}], "title": "7.2. Verifying an Authentication Assertion"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2468\u2461"}, {"id": "ref-for-relying-party\u2461\u2468\u2462"}, {"id": "ref-for-relying-party\u2461\u2468\u2463"}], "title": "9. WebAuthn Extensions"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2468\u2464"}], "title": "9.2. Defining Extensions"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2468\u2465"}, {"id": "ref-for-relying-party\u2461\u2468\u2466"}, {"id": "ref-for-relying-party\u2461\u2468\u2467"}], "title": "9.3. Extending Request Parameters"}, {"refs": [{"id": "ref-for-relying-party\u2461\u2468\u2468"}, {"id": "ref-for-relying-party\u2462\u24ea\u24ea"}, {"id": "ref-for-relying-party\u2462\u24ea\u2460"}, {"id": "ref-for-relying-party\u2462\u24ea\u2461"}, {"id": "ref-for-relying-party\u2462\u24ea\u2462"}], "title": "10.1.1. FIDO AppID Extension (appid)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u24ea\u2463"}, {"id": "ref-for-relying-party\u2462\u24ea\u2464"}], "title": "10.1.2. FIDO AppID Exclusion Extension (appidExclude)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u24ea\u2465"}, {"id": "ref-for-relying-party\u2462\u24ea\u2466"}], "title": "10.1.3. Credential Properties Extension (credProps)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u24ea\u2467"}, {"id": "ref-for-relying-party\u2462\u24ea\u2468"}, {"id": "ref-for-relying-party\u2462\u2460\u24ea"}], "title": "10.1.4. Pseudo-random function extension (prf)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2460\u2460"}, {"id": "ref-for-relying-party\u2462\u2460\u2461"}, {"id": "ref-for-relying-party\u2462\u2460\u2462"}, {"id": "ref-for-relying-party\u2462\u2460\u2463"}, {"id": "ref-for-relying-party\u2462\u2460\u2464"}, {"id": "ref-for-relying-party\u2462\u2460\u2465"}, {"id": "ref-for-relying-party\u2462\u2460\u2466"}, {"id": "ref-for-relying-party\u2462\u2460\u2467"}], "title": "10.1.5. Large blob storage extension (largeBlob)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2460\u2468"}], "title": "10.2.1. User Verification Method Extension (uvm)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2461\u24ea"}, {"id": "ref-for-relying-party\u2462\u2461\u2460"}], "title": "10.2.2. Device-bound public key extension (devicePubKey)"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2461\u2461"}, {"id": "ref-for-relying-party\u2462\u2461\u2462"}, {"id": "ref-for-relying-party\u2462\u2461\u2463"}, {"id": "ref-for-relying-party\u2462\u2461\u2464"}, {"id": "ref-for-relying-party\u2462\u2461\u2465"}, {"id": "ref-for-relying-party\u2462\u2461\u2466"}, {"id": "ref-for-relying-party\u2462\u2461\u2467"}], "title": "10.2.2.1. Relying Party Usage"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2461\u2468"}, {"id": "ref-for-relying-party\u2462\u2462\u24ea"}, {"id": "ref-for-relying-party\u2462\u2462\u2460"}, {"id": "ref-for-relying-party\u2462\u2462\u2461"}, {"id": "ref-for-relying-party\u2462\u2462\u2462"}], "title": "10.2.2.2. Extension Definition"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2462\u2463"}], "title": "10.2.2.2.2. Attestation calculations"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2462\u2464"}], "title": "10.2.2.3. devicePubKey Extension Output Verification Procedures"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2462\u2465"}, {"id": "ref-for-relying-party\u2462\u2462\u2466"}, {"id": "ref-for-relying-party\u2462\u2462\u2467"}, {"id": "ref-for-relying-party\u2462\u2462\u2468"}], "title": "10.2.2.3.1. Registration (create())"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2463\u24ea"}, {"id": "ref-for-relying-party\u2462\u2463\u2460"}, {"id": "ref-for-relying-party\u2462\u2463\u2461"}, {"id": "ref-for-relying-party\u2462\u2463\u2462"}, {"id": "ref-for-relying-party\u2462\u2463\u2463"}, {"id": "ref-for-relying-party\u2462\u2463\u2464"}], "title": "10.2.2.3.2. Authentication (get())"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2463\u2465"}], "title": "12.4. WebAuthn Extension Identifier Registrations"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2463\u2466"}, {"id": "ref-for-relying-party\u2462\u2463\u2467"}, {"id": "ref-for-relying-party\u2462\u2463\u2468"}, {"id": "ref-for-relying-party\u2462\u2464\u24ea"}], "title": "13. Security Considerations"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2464\u2460"}, {"id": "ref-for-relying-party\u2462\u2464\u2461"}], "title": "13.2. Physical Proximity between Client and Authenticator"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2464\u2462"}, {"id": "ref-for-relying-party\u2462\u2464\u2463"}], "title": "13.3.2. Attestation Certificate and Attestation Certificate CA Compromise"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2464\u2464"}], "title": "13.4. Security considerations for Relying Parties"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2464\u2465"}, {"id": "ref-for-relying-party\u2462\u2464\u2466"}, {"id": "ref-for-relying-party\u2462\u2464\u2467"}, {"id": "ref-for-relying-party\u2462\u2464\u2468"}, {"id": "ref-for-relying-party\u2462\u2465\u24ea"}, {"id": "ref-for-relying-party\u2462\u2465\u2460"}], "title": "13.4.1. Security Benefits for WebAuthn Relying Parties"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2465\u2461"}, {"id": "ref-for-relying-party\u2462\u2465\u2462"}, {"id": "ref-for-relying-party\u2462\u2465\u2463"}, {"id": "ref-for-relying-party\u2462\u2465\u2464"}], "title": "13.4.2. Visibility Considerations for Embedded Usage"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2465\u2465"}, {"id": "ref-for-relying-party\u2462\u2465\u2466"}], "title": "13.4.3. Cryptographic Challenges"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2465\u2467"}, {"id": "ref-for-relying-party\u2462\u2465\u2468"}, {"id": "ref-for-relying-party\u2462\u2466\u24ea"}, {"id": "ref-for-relying-party\u2462\u2466\u2460"}, {"id": "ref-for-relying-party\u2462\u2466\u2461"}, {"id": "ref-for-relying-party\u2462\u2466\u2462"}, {"id": "ref-for-relying-party\u2462\u2466\u2463"}, {"id": "ref-for-relying-party\u2462\u2466\u2464"}], "title": "13.4.4. Attestation Limitations"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2466\u2465"}, {"id": "ref-for-relying-party\u2462\u2466\u2466"}, {"id": "ref-for-relying-party\u2462\u2466\u2467"}], "title": "13.4.5. Revoked Attestation Certificates"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2466\u2468"}, {"id": "ref-for-relying-party\u2462\u2467\u24ea"}, {"id": "ref-for-relying-party\u2462\u2467\u2460"}], "title": "13.4.6. Credential Loss and Key Mobility"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2467\u2461"}, {"id": "ref-for-relying-party\u2462\u2467\u2462"}], "title": "13.4.7. Unprotected account detection"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2467\u2463"}, {"id": "ref-for-relying-party\u2462\u2467\u2464"}, {"id": "ref-for-relying-party\u2462\u2467\u2465"}, {"id": "ref-for-relying-party\u2462\u2467\u2466"}, {"id": "ref-for-relying-party\u2462\u2467\u2467"}, {"id": "ref-for-relying-party\u2462\u2467\u2468"}, {"id": "ref-for-relying-party\u2462\u2468\u24ea"}, {"id": "ref-for-relying-party\u2462\u2468\u2460"}, {"id": "ref-for-relying-party\u2462\u2468\u2461"}], "title": "13.4.8. Code injection attacks"}, {"refs": [{"id": "ref-for-relying-party\u2462\u2468\u2462"}, {"id": "ref-for-relying-party\u2462\u2468\u2463"}, {"id": "ref-for-relying-party\u2462\u2468\u2464"}, {"id": "ref-for-relying-party\u2462\u2468\u2465"}, {"id": "ref-for-relying-party\u2462\u2468\u2466"}, {"id": "ref-for-relying-party\u2462\u2468\u2467"}, {"id": "ref-for-relying-party\u2462\u2468\u2468"}], "title": "13.4.9. Validating the origin of a credential"}, {"refs": [{"id": "ref-for-relying-party\u2463\u24ea\u24ea"}], "title": "14. Privacy Considerations"}, {"refs": [{"id": "ref-for-relying-party\u2463\u24ea\u2460"}, {"id": "ref-for-relying-party\u2463\u24ea\u2461"}, {"id": "ref-for-relying-party\u2463\u24ea\u2462"}, {"id": "ref-for-relying-party\u2463\u24ea\u2463"}, {"id": "ref-for-relying-party\u2463\u24ea\u2464"}, {"id": "ref-for-relying-party\u2463\u24ea\u2465"}, {"id": "ref-for-relying-party\u2463\u24ea\u2466"}], "title": "14.1. De-anonymization Prevention Measures"}, {"refs": [{"id": "ref-for-relying-party\u2463\u24ea\u2467"}, {"id": "ref-for-relying-party\u2463\u24ea\u2468"}, {"id": "ref-for-relying-party\u2463\u2460\u24ea"}, {"id": "ref-for-relying-party\u2463\u2460\u2460"}, {"id": "ref-for-relying-party\u2463\u2460\u2461"}, {"id": "ref-for-relying-party\u2463\u2460\u2462"}, {"id": "ref-for-relying-party\u2463\u2460\u2463"}, {"id": "ref-for-relying-party\u2463\u2460\u2464"}, {"id": "ref-for-relying-party\u2463\u2460\u2465"}, {"id": "ref-for-relying-party\u2463\u2460\u2466"}, {"id": "ref-for-relying-party\u2463\u2460\u2467"}], "title": "14.2. Anonymous, Scoped, Non-correlatable Public Key Credentials"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2460\u2468"}, {"id": "ref-for-relying-party\u2463\u2461\u24ea"}, {"id": "ref-for-relying-party\u2463\u2461\u2460"}, {"id": "ref-for-relying-party\u2463\u2461\u2461"}, {"id": "ref-for-relying-party\u2463\u2461\u2462"}], "title": "14.3. Authenticator-local Biometric Recognition"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2461\u2463"}, {"id": "ref-for-relying-party\u2463\u2461\u2464"}, {"id": "ref-for-relying-party\u2463\u2461\u2465"}], "title": "14.5.1. Registration Ceremony Privacy"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2461\u2466"}, {"id": "ref-for-relying-party\u2463\u2461\u2467"}, {"id": "ref-for-relying-party\u2463\u2461\u2468"}], "title": "14.5.2. Authentication Ceremony Privacy"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2462\u24ea"}], "title": "14.6. Privacy considerations for Relying Parties"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2462\u2460"}, {"id": "ref-for-relying-party\u2463\u2462\u2461"}], "title": "14.6.1. User Handle Contents"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2462\u2462"}, {"id": "ref-for-relying-party\u2463\u2462\u2463"}, {"id": "ref-for-relying-party\u2463\u2462\u2464"}, {"id": "ref-for-relying-party\u2463\u2462\u2465"}, {"id": "ref-for-relying-party\u2463\u2462\u2466"}, {"id": "ref-for-relying-party\u2463\u2462\u2467"}, {"id": "ref-for-relying-party\u2463\u2462\u2468"}, {"id": "ref-for-relying-party\u2463\u2463\u24ea"}, {"id": "ref-for-relying-party\u2463\u2463\u2460"}, {"id": "ref-for-relying-party\u2463\u2463\u2461"}, {"id": "ref-for-relying-party\u2463\u2463\u2462"}, {"id": "ref-for-relying-party\u2463\u2463\u2463"}], "title": "14.6.2. Username Enumeration"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2463\u2464"}, {"id": "ref-for-relying-party\u2463\u2463\u2465"}, {"id": "ref-for-relying-party\u2463\u2463\u2466"}, {"id": "ref-for-relying-party\u2463\u2463\u2467"}, {"id": "ref-for-relying-party\u2463\u2463\u2468"}], "title": "14.6.3. Privacy leak via credential IDs"}, {"refs": [{"id": "ref-for-relying-party\u2463\u2464\u24ea"}, {"id": "ref-for-relying-party\u2463\u2464\u2460"}], "title": "15. Accessibility Considerations"}], "external": false};
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Web Authentication API"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u24ea"}], "title": "5.1. PublicKeyCredential Interface"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2460"}], "title": "5.1.3. Create a New Credential - PublicKeyCredential\u2019s [[Create]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2461"}], "title": "5.1.4. Use an Existing Credential to Make an Assertion - PublicKeyCredential\u2019s [[Get]](options) Method"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2462"}], "title": "5.1.7. Availability of User-Verifying Platform Authenticator - PublicKeyCredential\u2019s isUserVerifyingPlatformAuthenticatorAvailable() Method"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2463"}], "title": "5.1.8. Availability of a passkey platform authenticator - PublicKeyCredential\u2019s isPasskeyPlatformAuthenticatorAvailable() Method"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2464"}], "title": "5.1.9. Deserialize Registration ceremony options - PublicKeyCredential\u2019s parseCreationOptionsFromJSON() Method"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2465"}], "title": "5.1.10. Deserialize Authentication ceremony options - PublicKeyCredential\u2019s parseRequestOptionsFromJSON() Methods"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2466"}], "title": "5.2.1. Information About Public Key Credential (interface AuthenticatorAttestationResponse)"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2467"}], "title": "5.2.2. Web Authentication Assertion (interface AuthenticatorAssertionResponse)"}, {"refs": [{"id": "ref-for-webauthn-relying-party\u2460\u2468"}], "title": "5.4.1. 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@@ -11210,7 +11217,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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@@ -11308,7 +11315,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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 window.dfnpanelData['dom-publickeycredentialuserentity-id'] = {"dfnID": "dom-publickeycredentialuserentity-id", "url": "#dom-publickeycredentialuserentity-id", "dfnText": "id", "refSections": [{"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id"}], "title": "4. Terminology"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2460"}], "title": "5.1.3. Create a New Credential - PublicKeyCredential\u2019s [[Create]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2461"}, {"id": "ref-for-dom-publickeycredentialuserentity-id\u2462"}, {"id": "ref-for-dom-publickeycredentialuserentity-id\u2463"}, {"id": "ref-for-dom-publickeycredentialuserentity-id\u2464"}], "title": "5.4. Options for Credential Creation (dictionary PublicKeyCredentialCreationOptions)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2465"}, {"id": "ref-for-dom-publickeycredentialuserentity-id\u2466"}], "title": "5.4.3. User Account Parameters for Credential Generation (dictionary PublicKeyCredentialUserEntity)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2467"}], "title": "6.3.2. The authenticatorMakeCredential Operation"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2468"}], "title": "13.4.6. Credential Loss and Key Mobility"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-id\u2460\u24ea"}], "title": "14.4.2. Privacy of personally identifying information Stored in Authenticators"}], "external": false};
-window.dfnpanelData['dom-publickeycredentialuserentity-displayname'] = {"dfnID": "dom-publickeycredentialuserentity-displayname", "url": "#dom-publickeycredentialuserentity-displayname", "dfnText": "displayName", "refSections": [{"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname"}], "title": "4. Terminology"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460"}], "title": "5.1.4.1. PublicKeyCredential\u2019s [[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2461"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2462"}], "title": "5.4. Options for Credential Creation (dictionary PublicKeyCredentialCreationOptions)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2463"}], "title": "5.4.1. Public Key Entity Description (dictionary PublicKeyCredentialEntity)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2464"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2465"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2466"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2467"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2468"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u24ea"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u2460"}], "title": "5.4.3. User Account Parameters for Credential Generation (dictionary PublicKeyCredentialUserEntity)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u2461"}], "title": "6.3.2. The authenticatorMakeCredential Operation"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u2462"}], "title": "6.4. String Handling"}], "external": false};
+window.dfnpanelData['dom-publickeycredentialuserentity-displayname'] = {"dfnID": "dom-publickeycredentialuserentity-displayname", "url": "#dom-publickeycredentialuserentity-displayname", "dfnText": "displayName", "refSections": [{"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname"}], "title": "4. Terminology"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460"}], "title": "5.1.4.1. PublicKeyCredential\u2019s [[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2461"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2462"}], "title": "5.4. Options for Credential Creation (dictionary PublicKeyCredentialCreationOptions)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2463"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2464"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2465"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2466"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2467"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2468"}, {"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u24ea"}], "title": "5.4.3. User Account Parameters for Credential Generation (dictionary PublicKeyCredentialUserEntity)"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u2460"}], "title": "6.3.2. The authenticatorMakeCredential Operation"}, {"refs": [{"id": "ref-for-dom-publickeycredentialuserentity-displayname\u2460\u2461"}], "title": "6.4. String Handling"}], "external": false};
 window.dfnpanelData['dictdef-authenticatorselectioncriteria'] = {"dfnID": "dictdef-authenticatorselectioncriteria", "url": "#dictdef-authenticatorselectioncriteria", "dfnText": "AuthenticatorSelectionCriteria", "refSections": [{"refs": [{"id": "ref-for-dictdef-authenticatorselectioncriteria"}], "title": "5.1.9. Deserialize Registration ceremony options - PublicKeyCredential\u2019s parseCreationOptionsFromJSON() Method"}, {"refs": [{"id": "ref-for-dictdef-authenticatorselectioncriteria\u2460"}, {"id": "ref-for-dictdef-authenticatorselectioncriteria\u2461"}], "title": "5.4. Options for Credential Creation (dictionary PublicKeyCredentialCreationOptions)"}, {"refs": [{"id": "ref-for-dictdef-authenticatorselectioncriteria\u2462"}, {"id": "ref-for-dictdef-authenticatorselectioncriteria\u2463"}], "title": "5.4.4. Authenticator Selection Criteria (dictionary AuthenticatorSelectionCriteria)"}], "external": false};
 window.dfnpanelData['dom-authenticatorselectioncriteria-authenticatorattachment'] = {"dfnID": "dom-authenticatorselectioncriteria-authenticatorattachment", "url": "#dom-authenticatorselectioncriteria-authenticatorattachment", "dfnText": "authenticatorAttachment", "refSections": [{"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment"}], "title": "5.1.3. Create a New Credential - PublicKeyCredential\u2019s [[Create]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment\u2460"}], "title": "5.4.4. Authenticator Selection Criteria (dictionary AuthenticatorSelectionCriteria)"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment\u2461"}, {"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment\u2462"}, {"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment\u2463"}, {"id": "ref-for-dom-authenticatorselectioncriteria-authenticatorattachment\u2464"}], "title": "5.8.7. User-agent Hints Enumeration (enum PublicKeyCredentialHints)"}], "external": false};
 window.dfnpanelData['dom-authenticatorselectioncriteria-residentkey'] = {"dfnID": "dom-authenticatorselectioncriteria-residentkey", "url": "#dom-authenticatorselectioncriteria-residentkey", "dfnText": "residentKey", "refSections": [{"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-residentkey"}, {"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2460"}], "title": "5.1.3. Create a New Credential - PublicKeyCredential\u2019s [[Create]](origin, options, sameOriginWithAncestors) Method"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2461"}, {"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2462"}, {"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2463"}], "title": "5.4.4. Authenticator Selection Criteria (dictionary AuthenticatorSelectionCriteria)"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2464"}], "title": "5.4.6. Resident Key Requirement Enumeration (enum ResidentKeyRequirement)"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2465"}], "title": "6.2.2. Credential Storage Modality"}, {"refs": [{"id": "ref-for-dom-authenticatorselectioncriteria-residentkey\u2466"}], "title": "10.1.5. Large blob storage extension (largeBlob)"}], "external": false};