Partially blind proxy re-signature scheme with proven security |
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Authors: | Xiaodong YANG Chunlin CHEN Ping YANG Faying AN Tingchun MA Caifen WANG |
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Affiliation: | 1. College of Computer Science and Engineering,Northwest Normal University,Lanzhou 730070,China;2. State Key Laboratory of Cryptology,Beijing 100878,China |
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Abstract: | In order to solve the problem of anonymity and controllability of blind proxy re-signature,the concept of partially blind proxy re-signature was introduced by using the idea of partially blind signature.Furthermore,the security definition of partially blind proxy re-signature was also given.Based on the improved Shao scheme,a partially blind proxy re-signature scheme in the standard model was proposed.The proposed scheme allows proxy to add some public information negotiated by delegatee and proxy to re-signature.The scheme not only can achieve the transparent signature conversion from delegatee to proxy and protect privacy of message re-signed by proxy,but also prevented illegal use of re-signature.Analysis results show that the proposed scheme is correct,multi-use,partially blind and existentially unforgeable.It is more suitable for e-government data exchange system,cross-domain authentication system and so on. |
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Keywords: | partially blind proxy re-signature unforgeability multi-use standard model |
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