org.cryptimeleon.craco.sig

Interface MultiMessageSignatureScheme

All Superinterfaces:

org.cryptimeleon.math.serialization.Representable, org.cryptimeleon.math.serialization.annotations.RepresentationRestorer, SignatureScheme, org.cryptimeleon.math.serialization.StandaloneRepresentable

All Known Subinterfaces:

MultiMessageStructurePreservingSignatureScheme, StandardMultiMessageSignatureScheme, StructurePreservingSignatureEQScheme

All Known Implementing Classes:

BBSBSignatureScheme, PSExtendedSignatureScheme, PSSignatureScheme, SPSAGHO11SignatureScheme, SPSEQSignatureScheme, SPSFSP2SignatureScheme, SPSGroth15SignatureScheme, SPSKPW15SignatureScheme, SPSPOSSignatureScheme, SPSXSIGSignatureScheme

public interface MultiMessageSignatureScheme
extends SignatureScheme

A MultiMessageSignatureScheme is one where the sign and verify algorithms take a list of messages as input instead of a single message.

This is implemented as the special case of a single-message scheme where the signed message is of type MessageBlock.

This interface introduces some helper methods for this case.

Method Summary

Modifier and Type	Method and Description
default Signature	sign(SigningKey secretKey, PlainText... plainTexts) Signs multiple messages as a single unit.
default Signature	sign(SigningKey secretKey, org.cryptimeleon.math.structures.cartesian.Vector<? extends PlainText> plainTexts) Signs the given vector of plaintexts.
default java.lang.Boolean	verify(VerificationKey publicKey, Signature signature, PlainText... plainTexts) Verifies a signature for multiple messages.
default java.lang.Boolean	verify(VerificationKey publicKey, Signature signature, org.cryptimeleon.math.structures.cartesian.Vector<? extends PlainText> plainTexts) Verifies a signature for a vector of plaintexts.

Methods inherited from interface org.cryptimeleon.craco.sig.SignatureScheme

getMaxNumberOfBytesForMapToPlaintext, mapToPlaintext, mapToPlaintext, restoreFromRepresentation, restorePlainText, restoreSignature, restoreSigningKey, restoreVerificationKey, sign, sign, verify, verify

Methods inherited from interface org.cryptimeleon.math.serialization.Representable

getRepresentation

Method Detail

sign

default Signature sign(SigningKey secretKey,
                       PlainText... plainTexts)

Signs multiple messages as a single unit.

Parameters:

secretKey - key to sign with

plainTexts - plaintexts to sign

Returns:

signature over the given plaintexts

verify

default java.lang.Boolean verify(VerificationKey publicKey,
                                 Signature signature,
                                 PlainText... plainTexts)

Verifies a signature for multiple messages.

Parameters:

publicKey - key to use for verification

signature - signature to verify

plainTexts - plaintexts to verify signature for

Returns:

true if verification succeeds, else false

sign

default Signature sign(SigningKey secretKey,
                       org.cryptimeleon.math.structures.cartesian.Vector<? extends PlainText> plainTexts)

Signs the given vector of plaintexts.

Parameters:

secretKey - key to sign with

plainTexts - plaintexts to sign

Returns:

signature over the given vector of plaintexts

verify

default java.lang.Boolean verify(VerificationKey publicKey,
                                 Signature signature,
                                 org.cryptimeleon.math.structures.cartesian.Vector<? extends PlainText> plainTexts)

Verifies a signature for a vector of plaintexts.

Parameters:

publicKey - key to use for verification

signature - signature to verify

plainTexts - vector of plaintexts to verify signature for

Returns:

true if verification succeeds, else false