A Novel ID-Based Threshold Ring Signature Scheme Competent for Anonymity and Anti-forgery

Authors:
Yu Fang Chung;Zhen Yu Wu;Feipei Lai;Tzer Shyong Chen
Affiliations:
Electrical Engineering Department, National Taiwan University, Taipei, China;Computer Science and Information Engineering Department, National Cheng-Kung University, Tainan, China;Electrical Engineering Department, National Taiwan University, Taipei, China and Computer Science and Information Engineering Department, National Taiwan University, Taipei, China;Information Management Department, Tunghai University, Taichung, China
Venue:
Computational Intelligence and Security
Year:
2007

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Abstract

This study presents an approach to improving the (t, n) ring signature, which permits a signer to sign anonymously. Using fair partitioning to design a new (t, n) threshold ring signature based on bilinear pairing, the study develops a threshold signature method. The proposed method not only permits total signer anonymity, but also resist the signature of an anonymous signer from being forged even in a random oracle mode. Besides, the method is competent for protecting the identity and signature of a signer in regard to the anonymity property of ring signature. Therefore, this method trends suitable for those application complex, such as electronic voting and electronic cash, as well as for democratic management in which members with specific threshold value voice their opinion.