Universal designated-verifier proxy blind signatures for e-commerce

Authors:
Tianjie Cao;Dongdai Lin;Rui Xue
Affiliations:
School of Computer Science and Technology, China University of Mining and Technology, Xuzhou, China;State Key Laboratory of Information Security, Institute of Software of Chinese Academy of Sciences, Beijing, China;State Key Laboratory of Information Security, Institute of Software of Chinese Academy of Sciences, Beijing, China
Venue:
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
Year:
2005

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Abstract

To protect the privacy of proxy blind signature holders from dissemination of signatures by verifiers, this paper introduces universal designated-verifier proxy blind signatures. In a universal designated-verifier proxy blind signature scheme, any holder of a proxy blind signature can convert the proxy blind signature into a designated-verifier signature. Given the designated-signature, only the designated-verifier can verify that the message was signed by the proxy signer, but is unable to convince anyone else of this fact. This paper also proposes an ID-based universal designated-verifier proxy blind signature scheme from bilinear group-pairs. The proposed scheme can be used in E-commerce to protect user privacy.