Comments on Abe et al.'s Threshold Signer-ambiguous Signature Scheme from Variety of Keys
Ya‐Fen Chang, Chin‐Chen Chang · Advances in intelligent systems research/Advances in Intelligent Systems Research · 2006
In 2004, Abe et al. proposed a threshold signerambiguous signature scheme from variety of keys. Their scheme is a generalized case of the ring signature scheme, and it allows the key types to be based the trapdoor one-way permutations (TOWP) or sigma-protocols including Schnorr’s signature scheme. However, the signed message is public for all, which may result in disputes. In this paper, we present a novel threshold signer-ambiguous signature scheme, having the signed message concealed and keeping who the receivers are secret from variety of keys.