高效安全无证书部分盲签名

Efficient certificateless partially blind signature

提出了一个无证书的部分盲签名方案,并给出了其正式安全模型,解决了余丹等人提出的部分盲签名方案公共信息被篡改的问题。对新方案的正确性、部分盲性给予了分析,并在随机预言机模型下证明方案的安全性。新方案中密钥生成中心与用户交互时不再需要可信的安全信道,使之更符合实际应用;同时通过预计算e(P,P)=g作为系统公开参数,无需使用特殊的MapToPoint哈希函数,提高了方案的效率。与现有无证书部分盲签名在效率上进行比较,实验结果表明,该方案比现有方案更高效。

A new certificateless partially blind signature scheme is proposed and the problem of tampering the public information of certificateless partially blind signature is solved by YuDan presented, as well as the normal security model is given for certifi cateless paritially blind signature. The new scheme is proved to be correct, partially blind, and security under random oracle model. Finally, the new scheme does not need confidential channel between KGC and users; Meanwhile, the proposed scheme is more efficient by precomputing the pairing e （P, P） =g as the system public parameters and avoiding the using of special MapToPoint Hash function, compared with the existing ones in terms of efficiency, The results demonstrate that the presented scheme is much more efficient than the others.