Create digital_signatures.py

QuantumNexusProtocol/src/cryptography/digital_signatures.py

@@ -0,0 +1,20 @@
+from ecdsa import SigningKey, VerifyingKey, SECP256k1
+
+class DigitalSignature:
+    def __init__(self):
+        self.sk = SigningKey.generate(curve=SECP256k1)
+        self.v k = self.sk.get_verifying_key()
+
+    def sign(self, message):
+        return self.sk.sign(message)
+
+    def verify(self, message, signature):
+        return self.vk.verify(signature, message)
+
+# Example usage
+if __name__ == "__main__":
+    message = b"Digital signature message"
+    ds = DigitalSignature()
+    signature = ds.sign(message)
+    is_valid = ds.verify(message, signature)
+    print(f"Signature valid: {is_valid}")