A Concealed t-out-of-n Signer Ambiguous Signature Scheme with Variety of Keys

In 2004, Abe et al. proposed a threshold signer-ambiguous 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 on 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. Key words: trapdoor one-way permutation, digital signature, signer-ambiguous signature, ring signature, Schnorr’s signature scheme.

• Type: Journal
• Year: 2007
• Where: INFORMATICALT
• Authors: Ya-Fen Chang, Chin-Chen Chang, Pei-Yu Lin
• Keywords: INFORMATICALT 2007, Signature, Signature Scheme, Signer-ambiguous Signature Scheme