Struct Params 

pub struct Params {
    pub q: u64,
    pub n: usize,
    pub l: usize,
    pub n_expanded: usize,
    pub m: usize,
    pub error_bound: i64,
}

LWE/GSW instance parameters.

Fields

q: u64

Modulus q (must be power of 2 for gadget)

n: usize

Lattice dimension n

l: usize

Number of bits to represent q: l = log2(q)

n_expanded: usize

N = (n+1) * l - dimension of expanded gadget space

m: usize

Number of LWE samples for public key (columns of A)

error_bound: i64

Error bound B for discrete uniform error distribution [-B, B]

Implementations

impl Params

pub fn new(level: SecurityLevel) -> Self

Create parameters for the given security level.

Parameters are chosen so that correctness never fails:

• Error growth: mult multiplies error by ~N=(n+1)*l, add doubles it
• Requirement: N * sqrt(m) * B ≪ q/4 for one multiplication

pub fn toy() -> Self

Create toy parameters for quick testing.

Trait Implementations

impl Clone for Params

fn clone(&self) -> Params

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Params

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.