Enum PrivacyMechanism 

pub enum PrivacyMechanism {
    Laplace {
        sensitivity: f64,
        epsilon: f64,
    },
    Gaussian {
        sensitivity: f64,
        epsilon: f64,
        delta: f64,
    },
    Randomized {
        epsilon: f64,
    },
}

The noise mechanism to apply when answering a differentially-private query.

Variants

Laplace

Laplace mechanism: adds Laplace-distributed noise calibrated to sensitivity / epsilon.

Fields

sensitivity: f64

Global L1 sensitivity of the query function.

epsilon: f64

Privacy parameter ε > 0.

Gaussian

Gaussian mechanism: adds Gaussian noise calibrated to achieve (ε, δ)-differential privacy.

Fields

sensitivity: f64

Global L2 sensitivity of the query function.

epsilon: f64

Privacy parameter ε > 0.

delta: f64

Privacy failure probability δ ∈ (0, 1).

Randomized

Randomized response mechanism for local differential privacy.

Fields

epsilon: f64

Privacy parameter ε > 0 (determines flip probability).

Implementations

impl PrivacyMechanism

pub fn epsilon(&self) -> f64

Return the epsilon associated with this mechanism.

pub fn delta(&self) -> f64

Return the delta associated with this mechanism (0.0 for pure DP).

pub fn sensitivity(&self) -> Option<f64>

Return the sensitivity, if applicable (None for Randomized).

pub fn validate(&self) -> Result<(), DpError>

Validate mechanism parameters, returning an error on invalid values.

Trait Implementations

impl Clone for PrivacyMechanism

fn clone(&self) -> PrivacyMechanism

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PrivacyMechanism

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

Formats the value using the given formatter.

impl PartialEq for PrivacyMechanism

fn eq(&self, other: &PrivacyMechanism) -> 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 StructuralPartialEq for PrivacyMechanism