Paillier JS

A Javascript implementation of the Paillier cryptosystem, invented by Pascal Pailler in 1999. The Paillier cryptosystem is an additive homomorphic system, meaning that given only the public-key and the encryption of m1 and m2, one can compute the encryption of m1 + m2.

Usage

** Addition**

var keys = Paillier.generateKeys(1024);

var encA = keys.pub.encrypt(7891),
    encB = keys.pub.encrypt(3456);

var encSum = keys.pub.add(encA, encB),
    decSum = keys.sec.decrypt(encSum);

// decSum is equal to 11347

Multiplication

var keys = Paillier.generateKeys(1024);

var encA = keys.pub.encrypt(7891);

var encMul = keys.pub.mult(encA, 3456),
    decMul = keys.sec.decrypt(encMul);

// decMul is equal to 27271296

Dependencies

Depends on sjcl.js and jsbn.js (included in this repository under the lib/ folder).

License

This code is licensed under the GPL v3.