提出了一个安全无证书的盲签名方案。新方案预运算e(P,P)=g作为系统公开参数,无需使用特殊的MapToPoint哈希函数,提高了方案的计算效率;同时方案中密钥生成中心(KGC)与用户间不再需要可信的安全通道,更加适合实际应用。此外新方案采用了无证书公钥密码体制,解决了基于证书签名方案的证书管理问题和基于身份签名方案的密钥托管问题。在q-SDH和CDH困难假设下新方案是不可伪造的。
In this paper a secure certificateless blind signature scheme is presented.This new scheme is more efficient by pre-computing the pairing e(P,P)= g as the system public parameters.Meanwhile the proposed scheme does not need the special MaptoPoint Hash function and the confidential channel between KGC and users.Based on certificateless public cryptosystem,it avoids the using of certificate in certificate-based signature scheme and removes key escrow in ID-based signature scheme.The proposed scheme is unforgeable under the hardness assumption of the q-Strong Diffie-Hellman problem and Computational Diffie-Hellman problem.