Elgamal Encryption

This crate provides an implementation of the Elgamal encryption scheme over elliptic curves using the BLS12-381 curve (G1).

Note: this repository has not been thoroughly audited. Please take your own risk if you use it in production environment.

Example

use ark_std::UniformRand;
use bls_elgamal::{Fr, SecretKey, G1Affine};
use rand::prelude::StdRng;
use rand_core::SeedableRng;
    
let mut rng = StdRng::from_entropy();
let x = Fr::rand(&mut rng);
let g1 = G1Affine::rand(&mut rng);

// Create a secret key and a public key
let sk = SecretKey::new(g1, x);
let pk = sk.public_key();

// Define a message and randomness
let m = G1Affine::rand(&mut rng);
let r = Fr::rand(&mut rng);

// Encrypt and decrypt the message
let ciphertext = pk.encrypt(m, r);
let decrypted_m = sk.decrypt(ciphertext);

assert_eq!(m, decrypted_m);