Crate fast_paillier 

Optimized Paillier encryption scheme

Library implements Paillier encryption scheme with optimization such as:

• Faster encryption and homomorphic operations via Chinese Remainder Theorem when the private key is known
• Faster secret key generation (a.k.a faster safe primes generation)

Big integer backend

This crate uses an abstraction over the big integer implementation, available in backend module. The concrete backend can be selected with a feature flag:

• backend-num-bigint (default) - use num-bigit
• backend-rug - use rug. This backend is based on GNU GMP and can be several times faster.

The applicability of this backend to your uses is not guaranteed, any additional functionality to it will not be added. However, you can convert them to bytes or, if using a fixed backend, to the underlying format, and perform the necessary operations with those.

#![no_std] support

Library is #![no_std]-friendly as long as you enable no_std feature, and you use only these features: backend-num-bigint, serde. Enabling other features will introduce transitive dependency on std.

Join us in Discord!

Feel free to reach out to us in Discord!

Modules

backend

Abstract big integer backend. This module makes no guarantees of applicability, all methods are considered internal, except for conversion functions:

utils

Various utilities

Structs

DecryptionKey

Paillier decryption key

EncryptionKey

Paillier encryption key

Error

Error type used in the library

Traits

AnyEncryptionKey

Any key capable of encryption

AnyEncryptionKeyExt

Additional functionality implemented for AnyEncryptionKey

Type Aliases

Ciphertext

Paillier ciphertext

Nonce

Paillier nonce

Plaintext

Paillier plaintext