cggmp21-keygen has 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...

GHSA-7JJX-3QW9-J6H6 cggmp21-keygen has 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...