限制联合验证者签名
doi: 10.3724/SP.J.1146.2006.01507
Limited Confederate Verifier Signatures
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摘要: 基于门限的思想，该文提出一种新签名方案限制联合验证者签名的精确定义和安全模型，并构造了一个有效的限制联合验证者签名方案。新方案支持将消息的知情权和签名的验证权控制给t个验证者，并且当且仅当t个验证者合作才能验证签名，同时签名的长度不随验证者的增加而增加。在随机预言模型下，新方案达到了所需的安全要求。Abstract: The precise definition and security model of a new signature scheme－limited confederate verifier signatures is proposed based on the idea of threshold. An efficient limited confederate verifier signatures scheme is also constructed for the first time. The new scheme allows confining the right to learn the message and the right to verify the signature within t verifiers, the signature can be verified iff all the t verifiers cooperate. Moreover, the size of the signature does not grow with the number of verifiers. The scheme is proved to achieve the desired security request under the random oracle model.
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