Class Nonce<C>

A scalar that is a signing nonce.

Nonces are secret values generated during Round 1 that must be kept private and used exactly once for a signing operation.

Type Parameters

C extends Ciphersuite

Index

Methods

generate fromScalar toScalar nonceGenerateFromRandomBytes deserialize serialize zeroize

Methods

`Static`generate

generate<C extends Ciphersuite>(
    ciphersuite: C,
    secret: SigningShare<C>,
    rng: RandomSource,
): Nonce<C>
Generates a new uniformly random signing nonce by sourcing fresh randomness and combining with the secret signing share, to hedge against a bad RNG.

Each participant generates signing nonces before performing a signing operation.

An implementation of nonce_generate(secret) from the spec.
Type Parameters
- C extends Ciphersuite
Parameters
- ciphersuite: C
  The ciphersuite to use
- secret: SigningShare<C>
  The participant's signing share
- rng: RandomSource
  A cryptographically secure random number generator
Returns Nonce<C>
A new signing nonce
- Defined in core/dist/index.d.ts:1472

`Static`fromScalar

fromScalar<C extends Ciphersuite>(ciphersuite: C, scalar: C["Scalar"]): Nonce<C>
Internal
Create a nonce from a scalar.
Type Parameters
- C extends Ciphersuite
Parameters
- ciphersuite: C
- scalar: C["Scalar"]
Returns Nonce<C>
- Defined in core/dist/index.d.ts:1477

toScalar

toScalar(): C["Scalar"]
Internal
Convert a nonce into a scalar.

Returns C["Scalar"]
- Defined in core/dist/index.d.ts:1482

`Static`nonceGenerateFromRandomBytes

nonceGenerateFromRandomBytes<C extends Ciphersuite>(
    ciphersuite: C,
    secret: SigningShare<C>,
    randomBytes: Uint8Array,
): Nonce<C>
Internal
Generates a nonce from the given random bytes. This function allows testing and MUST NOT be made public.
Type Parameters
- C extends Ciphersuite
Parameters
- ciphersuite: C
- secret: SigningShare<C>
- randomBytes: Uint8Array
Returns Nonce<C>
- Defined in core/dist/index.d.ts:1488

`Static`deserialize

deserialize<C extends Ciphersuite>(ciphersuite: C, bytes: Uint8Array): Nonce<C>
Deserialize a Nonce from bytes.
Type Parameters
- C extends Ciphersuite
Parameters
- ciphersuite: C
  The ciphersuite to use
- bytes: Uint8Array
  The serialized nonce bytes
Returns Nonce<C>
The deserialized nonce

Throws
Error if deserialization fails
- Defined in core/dist/index.d.ts:1497

serialize

serialize(): Uint8Array
Serialize the Nonce to bytes.

Returns Uint8Array
The serialized nonce bytes
- Defined in core/dist/index.d.ts:1503

zeroize

zeroize(): void
Zeroize the nonce by overwriting the scalar with zero.

This should be called when the nonce is no longer needed to prevent secret data from remaining in memory.

Returns void
- Defined in core/dist/index.d.ts:1510