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EncProof

dkls23_core::utilities::proofs

Struct EncProof 

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pub struct EncProof<C: DklsCurve> {
    pub proof0: CPProof<C>,
    pub proof1: CPProof<C>,
    pub commitments0: RandomCommitments<C>,
    pub commitments1: RandomCommitments<C>,
    pub challenge0: C::Scalar,
    pub challenge1: C::Scalar,
}
Expand description

Encryption proof used during the Endemic OT protocol of Zhou et al.

See page 17 of https://eprint.iacr.org/2022/1525.pdf.

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§proof0: CPProof<C>

EncProof is a proof that proof0 or proof1 really proves what it says.

§proof1: CPProof<C>§commitments0: RandomCommitments<C>§commitments1: RandomCommitments<C>§challenge0: C::Scalar§challenge1: C::Scalar

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impl<C: DklsCurve> EncProof<C>

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pub fn prove( session_id: &[u8], base_h: &C::AffinePoint, scalar: &C::Scalar, bit: bool, ) -> EncProof<C>

Computes a proof for the witness scalar.

The variable bit indicates which one of the proofs is really proved by scalar. The other one is simulated.

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pub fn verify(&self, session_id: &[u8]) -> bool

Verification of an encryption proof.

Note that the data to be verified is in proof.

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pub fn get_u_and_v(&self) -> (C::AffinePoint, C::AffinePoint)

Extracts u and v from an instance of EncProof.

Be careful: the notation for u and v here is the same as the one used in the paper by Zhou et al. at page 17. Unfortunately, u and v appear in the other order in their description of the Chaum-Pedersen protocol. Hence, u and v here are not the same as point_u and point_v in CPProof.

Trait Implementations§

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impl<C: Clone + DklsCurve> Clone for EncProof<C>
where C::Scalar: Clone,

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fn clone(&self) -> EncProof<C>

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<C: Debug + DklsCurve> Debug for EncProof<C>
where C::Scalar: Debug,

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

Formats the value using the given formatter. Read more
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impl<'de, C: DklsCurve> Deserialize<'de> for EncProof<C>
where C::AffinePoint: Deserialize<'de>, C::Scalar: Deserialize<'de>,

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<C: DklsCurve> Serialize for EncProof<C>
where C::AffinePoint: Serialize, C::Scalar: Serialize,

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

Serialize this value into the given Serde serializer. Read more

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