Trait oberon::inner_types::elliptic_curve::bigint::RandomMod
pub trait RandomMod: Sized + Zero {
// Required method
fn random_mod(rng: &mut impl CryptoRngCore, modulus: &NonZero<Self>) -> Self;
}Expand description
Modular random number generation support.
Required Methods§
fn random_mod(rng: &mut impl CryptoRngCore, modulus: &NonZero<Self>) -> Self
fn random_mod(rng: &mut impl CryptoRngCore, modulus: &NonZero<Self>) -> Self
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 CSRNG 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 CSRNG, where previous outputs are unrelated to subsequent outputs and do not reveal information about the RNG’s internal state.