3 results · Feed
-
High 8.2
CGGMP21 presignatures can be used in the way that significantly reduces security
CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. In versions 0.6.3 and prior of cggmp21 and version 0.7.0-alpha.1 of cggmp24, presignatures can be use…
-
Critical 9.3
CGGMP24 is missing a check in the ZK proof used in CGGMP21
CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. Prior to version 0.6.3, there is a missing check in the ZK proof that enables an attack in which sing…
-
Low —
cggmp21 vulnerable to ambiguous challenge derivation
Challenge derivation in non-interactive ZK proofs was ambiguous and that could lead to security vulnerability (however, it's unknown if it could be exploited).