paillier.js

A pure javascript implementation of python-paillier.

Currently relies on jsbn and the crypto module.

What is done?

• [x] Generate paillier keypairs
• [ ] Raw encryption of integers
  • [x] Raw encryption of small integers (less than 2^16)
  • [x] Deal with encrypting large numbers (see shortcut)
• [x] Raw decryption of ciphertext strings into integers
• [ ] Encoded Number
• [ ] Full test coverage
  • [ ] Port of python-paillier's raw encryption tests
  • [ ] Port of python-paillier's encoded number tests
  • [ ] Port of python-paillier's encrypted number tests
  • [ ] Port of python-paillier's keyring tests
  • [ ] in-browser tests (crypto-browserify may come in handy)

Paillier Cryptosystem

The homomorphic properties of the paillier crypto system are:

• Encrypted numbers can be multiplied by a non encrypted scalar.
• Encrypted numbers can be added together.
• Encrypted numbers can be added to non encrypted scalars.