一种基于证书的带消息恢复的代理签名方案

Certificate-based proxy signature scheme with message recovery

针对基于身份公钥密码体制中固有的密钥托管和传统公钥密码系统中证书管理问题,结合基于证书公钥密码系统的优点和消息恢复签名的特点,设计了一种基于证书的带消息恢复的代理签名方案,该方案基于离散对数问题和计算Deffie-Hellman问题假设,可限制代理人滥用代理权力,具有正确性、不可伪造性和不可否认性,最后给出了证明。

Combining with the advantage of certificate-based public key cryptosystem and the character of message recovery signature, this paper proposes a new certificate-based proxy signature scheme with message Recovery against the problems of key escrow existing in the ID-based PKC and Certificate management in traditional PKC. The scheme is based on the hardness of DLP and CDHP assumption, restricts agents abuse of proxy powers and it is been proved correctness, unforgeability and non- repudiation. In the end, it proves that.