Struct ActiveParticipant

pub struct ActiveParticipant<G: Group> { /* private fields */ }

Personalized state of a participant of a threshold ElGamal encryption scheme once the participant receives the secret share from the Dealer. At this point, the participant can produce VerifiableDecryptions.

Implementations

impl<G: Group> ActiveParticipant<G>

pub fn new( key_set: PublicKeySet<G>, index: usize, secret_share: SecretKey<G>, ) -> Result<Self, Error>

Creates the participant state based on readily available components.

Errors

Returns an error if secret_share does not correspond to the participant’s public key share in key_set.

Panics

Panics if index is greater or equal than the number of participants in key_set.

pub fn key_set(&self) -> &PublicKeySet<G>

Returns the public key set for the threshold ElGamal encryption scheme this participant is a part of.

pub fn index(&self) -> usize

Returns 0-based index of this participant.

pub fn secret_share(&self) -> &SecretKey<G>

Returns share of the secret key for this participant. This is secret information that must not be shared.

pub fn public_key_share(&self) -> &PublicKey<G>

Returns share of the public key for this participant.

pub fn proof_of_possession<R: CryptoRng + RngCore>( &self, rng: &mut R, ) -> ProofOfPossession<G>

Generates a ProofOfPossession of the participant’s secret_share.

pub fn decrypt_share<R>( &self, ciphertext: Ciphertext<G>, rng: &mut R, ) -> (VerifiableDecryption<G>, LogEqualityProof<G>)

where R: CryptoRng + RngCore,

Creates a VerifiableDecryption for the specified ciphertext together with a proof of its validity. rng is used to generate the proof.

Trait Implementations

impl<G: Clone + Group> Clone for ActiveParticipant<G>

fn clone(&self) -> ActiveParticipant<G>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<G: Debug + Group> Debug for ActiveParticipant<G>

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

Formats the value using the given formatter.

impl<'de, G: Group> Deserialize<'de> for ActiveParticipant<G>

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<G: Group> Serialize for ActiveParticipant<G>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.