HumMPC: Summation with Private Deletion

Goals

Secure multi-party computation allows input-parties to perform operations on their data without anyone being able to know another individual's data.

HumMPC implements an algorithm that not only performs secure summation, but also allows input-parties to securely delete their data using a token easy to remember, such as an email address, which will also be kept private. Also, the deletion process is private, as no one would know who have requested deletion.

Installation

npm install

Running

Manual

1. Run the server with

node server.js

2. Run the analyst with

node analyst.js

3. Input data with

node input-party.js input ${token} ${input_val}

where ${token} could be any token such as an email

If an input-party wishes to delete data, it could be done before analyst starts computation

node input-party.js delete ${token}

4. Hit enter in the analyst window to start computation! The sum of all inputs (that are not deleted) will be revealed.

Automatic

make run

Input in the 3rd window as the input party described in the manual guide. You can run sh test/sample_input.sh to automate 6 inputs and 2 deletes.

How to change computation done (sum or average)

We have implmented summing and averaging the input-party inputs. In server and analyst mpcAverage and mpcSum are defined at the top. Switch to whichever you like by changing the name under // start computation in both files.

Base algorithm for data division, storage and computation

Tests

See test folder to find our method time anaylsis.

Formatting

To format javascript files run,

npm run lint
npm run format