Enum SboxVerdict 

pub enum SboxVerdict {
    Affine,
    LinearComponent,
    DeterministicDifference,
    Quadratic,
    NoStructuralWeaknessFound {
        differential_uniformity: u32,
        linearity: u64,
        min_degree: usize,
        boomerang_uniformity: Option<u32>,
    },
}

The structural-security verdict on an S-box — the vectorial analogue of rsa_full_audit. It flags only PROVABLE weaknesses (an exact linear relation, a deterministic difference, a quadratic system); a clean profile is the honest ceiling, “no structural weakness of these classes,” never a proof of security (the Chaitin frame in the symmetric world).

Variants

Affine

Every component is affine — trivially broken; linear cryptanalysis is exact.

LinearComponent

Some component ⟨b, S(x)⟩ is affine (linearity = 2ⁿ): a linear relation among the outputs holds with probability 1.

DeterministicDifference

Some input difference forces a single output difference (differential uniformity = 2ⁿ).

Quadratic

Algebraic degree 2 — the S-box is a system of quadratic equations, the classic algebraic-attack target.

NoStructuralWeaknessFound

No structural weakness of the above classes. The profile is the honest ceiling, not a security proof.

Fields

differential_uniformity: u32

linearity: u64

min_degree: usize

boomerang_uniformity: Option<u32>

Trait Implementations

impl Clone for SboxVerdict

fn clone(&self) -> SboxVerdict

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SboxVerdict

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

Formats the value using the given formatter.

impl PartialEq for SboxVerdict

fn eq(&self, other: &SboxVerdict) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for SboxVerdict

impl StructuralPartialEq for SboxVerdict