ch.epfl.dedis.lib.crypto

Class BdnSig

java.lang.Object

ch.epfl.dedis.lib.crypto.BdnSig

public class BdnSig
extends Object

Boneh-Drijvers-Neven (BDN) signature scheme is a modified version of the BLS signature scheme that is robust against rogue public-key attacks. Single signatures are compatible with BLS because only the aggregation of the public keys and the signatures is different.

Constructor Summary

Constructors

Constructor and Description
BdnSig(byte[] sig) Instantiate a BDN signature with the bytes representation

Method Summary

Modifier and Type	Method and Description
boolean	verify(byte[] msg, Mask mask) Verify the signature against the message and the aggregated public key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BdnSig

public BdnSig(byte[] sig)

Instantiate a BDN signature with the bytes representation

Parameters:

sig - Byte array of the serialized signature

Method Detail

verify

public boolean verify(byte[] msg,
                      Mask mask)

Verify the signature against the message and the aggregated public key. The mask is used to derive the aggregation with only the keys involved in the signature.

Parameters:

msg - Signed message in bytes

mask - Mask of the participation of the public keys

Returns:

true if the signature matches, false otherwise