Title: An improvement in strong designated verifier signatures

Authors: Fuw-Yi Yang; Ling-Ren Liang; Chun-Chin Hsu

Addresses: Department of Computer Science and Information Engineering, Chaoyang University of Technology, Wufeng District – 41349, Taichung, Taiwan ' Department of Computer Science and Information Engineering, Chaoyang University of Technology, Wufeng District – 41349, Taichung, Taiwan ' Department of Industrial Engineering and Management, Chaoyang University of Technology, Wufeng District – 41349, Taichung, Taiwan

Abstract: Designated verifier signature schemes are applied in situations such as electronic voting and electronic auctions. Signature recipients can ascertain the contents of the document, but cannot verify the identity of the signer to a third party. This study reviewed the protocols of past researches and analysed whether these protocols would disclose signer identities under various types of attacks. The paper also proposes a strong designated verifier signature scheme that possesses more efficient calculation as well as simpler string encoding for signers. Based on the difficulty of Gap Diffie-Hellman problem and in the Standard Model, the scheme is existentially unforgeable under the adaptively chosen message attacks.

Keywords: deniable authentication; designated verifier signatures; signature simulation; unforgeability; e-voting; e-auctions; electronic voting; electronic auctions; security.

DOI: 10.1504/IJCNDS.2014.064641

International Journal of Communication Networks and Distributed Systems, 2014 Vol.13 No.3/4, pp.277 - 289

Received: 24 May 2013
Accepted: 18 Apr 2014
Published online: 13 Sep 2014 *

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