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张学军 《计算机工程与应用》2010,46(13):28-30
针对目前指定验证者签名权可授权的问题,基于双线性对提出一种高效的基于身份不可授权的强指定验证者签名方案,采用密码学上安全性分析的方法,结果证明了新方案在保持了强指定验证者各种安全特性的条件下,其效率高于已有方案,更适合于在实际中应用。 相似文献
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A non-delegatable strong designated verifier signature (NSDVS) enforces verification of a signature by a designated verifier only. The concept is useful in various commercial cryptographic applications such as copyright protection, e-voting, and e-libraries. This paper reports the shortest NSDVS so far that consists of only two elements. The scheme is inspired by an identification scheme and Cramer et al.’s OR-proof technique where a prover can prove that he knows at least one out two secrets. It is solidified by a symmetric key based group to group encryption algorithm. Two implementations of the algorithm are reported. The scheme is provably secure with respect to its properties of unforgeability, non-transferability, privacy of signer’s identity, and non-delegatability. 相似文献
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强指定验证者签名能够解决不向第3方证明发送方身份的前提下,仅指定的接收方可验证消息发送方身份的问题。基于计算双线性Diffe-Hellman假定,利用双线性对,提出了一种强指定验证者签名方案。该方案具有不可伪造性、签名者身份的隐私性和不可传递性。在团购、政府招标、艺术品拍卖等典型电子商务应用中具有现实意义。 相似文献
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