Struct scicrypt::cryptosystems::integer_el_gamal::IntegerElGamal

pub struct IntegerElGamal { /* private fields */ }

Multiplicatively homomorphic ElGamal over a safe prime group where the generator is 4.

As an example we compute the product between 4 and 6 using ElGamal’s homomorphic property.

let mut rng = GeneralRng::new(OsRng);
let el_gamal = IntegerElGamal::setup(&Default::default());
let (public_key, secret_key) = el_gamal.generate_keys(&mut rng);

let ciphertext_1 = public_key.encrypt(&Integer::from(4), &mut rng);
let ciphertext_2 = public_key.encrypt(&Integer::from(6), &mut rng);

println!("[4] * [6] = [{}]", secret_key.decrypt(&(ciphertext_1 * ciphertext_2)));
// Prints: "[4] * [6] = [24]".

Trait Implementations

impl AsymmetricCryptosystem for IntegerElGamal

fn setup(security_param: &BitsOfSecurity) -> IntegerElGamal

Uses previously randomly generated safe primes as the modulus for pre-set modulus sizes.

fn generate_keys<R>(
    &self,
    rng: &mut GeneralRng<R>
) -> (IntegerElGamalPK, IntegerElGamalSK) where
    R: SecureRng, 

Generates a fresh ElGamal keypair.

let el_gamal = IntegerElGamal::setup(&Default::default());
let (public_key, secret_key) = el_gamal.generate_keys(&mut rng);

type PublicKey = IntegerElGamalPK

The public key, used for encrypting plaintexts.

type SecretKey = IntegerElGamalSK

The secret key, used for decrypting ciphertexts.

impl Clone for IntegerElGamal

fn clone(&self) -> IntegerElGamal

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.