Javascript Paillier demo homomorphic encryption in the browser

The Paillier cryptosystem a probabilistic assymetric algorithm with additive homomorphic properties. This means that given the ciphertexts of two numbers, anyone can compute an encryption of the sum of these two numbers. This page demonstrates the jspaillier library, a Javascript implementation of the Paillier crypto system.

Do keep in mind this is proof-of-concept code. Also, doing crypto in Javascript is typically considered to be a Bad Idea (tm), see also the discussion "Javascript Cryptography Considered Harmful".

Key generation

Number of bits

Number of pre-computations

public n: -

private lambda: -

Elapsed time (keygen): - ms

Elapsed time (precomputation): - ms

Test input

Test input A Test input B

[A] = -

Elapsed time: - ms

[B] = -

Elapsed time: - ms

Encrypted addition

[A + B] = -

Elapsed time: - ms

Elapsed time (randomize): - ms

Encrypted multiplication

Test input C

[(A + B)*C] = -

Elapsed time: - ms

Elapsed time (randomize): - ms

Decryption

(A + B)*C = -

Elapsed time: - ms

Acknowledgements

A large part of the work on the jspaillier library was done at TNO in a project supported by the COMMIT program.