Trait crypto_bigint::RandomMod

source · 
pub trait RandomMod: Sized + Zero {
    fn random_mod(rng: impl CryptoRng + RngCore, modulus: &NonZero<Self>) -> Self;
}
Expand description

Modular random number generation support.

Required Methods§

Generate a cryptographically secure random number which is less than a given modulus.

This function uses rejection sampling, a method which produces an unbiased distribution of in-range values provided the underlying CryptoRng is unbiased, but runs in variable-time.

The variable-time nature of the algorithm should not pose a security issue so long as the underlying random number generator is truly a CryptoRng, where previous outputs are unrelated to subsequent outputs and do not reveal information about the RNG’s internal state.

Implementors§