A special proxy signature scheme with multi-warrant

Authors:
Jianhong Zhang;Hua Chen;Shengnan Gao;Yixian Yang
Affiliations:
College of sciences, North China University of Technology, Beijing, China;College of sciences, North China University of Technology, Beijing, China;College of sciences, North China University of Technology, Beijing, China;School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Venue:
ASIAN'09 Proceedings of the 13th Asian conference on Advances in Computer Science: information Security and Privacy
Year:
2009

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Abstract

Proxy signature is an important delegation technology. In this paper, we proposed a novel proxy signature scheme with multi-warrant by extending proxy signature. This extension is not a trivial extension, it makes that the size of extended proxy signature is approximate one of original proxy signature. And the size of the extended proxy signature is constant and is independent of warrant’s number. The scheme is proven secure in the standard model and the security of the scheme is related to the Computational Diffie-Hellman Assumption. Comparison with Huang et.al scheme, our scheme has an advantage over Huang et.al’s scheme in terms of the size of proxy signature.