Module privacy 

Privacy-preserving linear algebra.

Differential-privacy releases use caller-owned output buffers. BFV keys and ciphertexts deliberately live outside the 48-byte semantic datum ABI; a HeCiphertextRef is the fixed-size reference that crosses that boundary.

Structs

BfvCiphertext

Ciphertext object owned at the crypto boundary.

BfvEngine

One BFV key/evaluation context using parameters selected for ~128-bit security.

DifferentialPrivacy

Differential-privacy release engine with explicit total budget.

HeCiphertextRef

Fixed-size ABI reference to a ciphertext held in an external bounded store.

HomomorphicKey

Heap-free key metadata. Secret/public/evaluation key bytes stay in the HE backend.

HomomorphicKeyManager

Fixed-capacity metadata registry. Key material is never copied into this table.

HomomorphicOperations

HE capability facade. Construct BfvEngine explicitly when the feature is enabled; key generation is intentionally not hidden inside LinearAlgebraLibrary::new().

KeyRotationPolicy

Rotation policy for externally managed HE keys.

OsNoise

Operating-system cryptographic entropy.

PrivacyAccountant

Stateful accountant. Fields remain scalar so charging performs no allocation.

PrivacyBudget

A total and remaining (ε,δ) budget.

PrivacyEngine

Privacy engine for secure linear algebra.

SecureAggregation

Enums

AggregationProtocol

Secure aggregation protocols supported by BFV packed arithmetic.

CompositionMethod

Privacy-loss composition used by PrivacyAccountant.

HeError

HeScheme

HomomorphicKeyType

Homomorphic scheme selected for exact linear algebra.

HomomorphicOperation

Operations implemented by the configured HE backend.

NoiseMechanism

Noise mechanisms with implemented calibration and sampling.

PrivacyError

Constants

MAX_BFV_PACKED_SLOTS

MAX_SERIALIZED_HE_CONTEXT_BYTES

Traits

NoiseSource

Source of cryptographic noise bytes.

Functions

decode_fixed_point_into

Decode fixed-point integers into a caller-owned floating-point buffer.

encode_fixed_point_into

Quantize finite floating-point values into a caller-owned fixed-point buffer.