一个可证明安全的无证书盲环签名方案

为了设计一种有效的盲环签名方案, 同时克服公钥证书密码体制中的复杂证书管理以及基于身份密码体制中的密钥托管问题, 将盲环签名和无证书密码体制相结合, 充分利用两者的优势, 并通过使用双线性对技术, 在随机预言模型下基于k-碰撞攻击算法(k-CAA)困难问题和修改的逆计算Diffie-Hellman(mICDH)困难问题, 提出了一种有效的无证书盲环签名方案。最后, 对方案的正确性和安全性进行了分析, 证明了该方案满足适应性选择消息攻击下的存在不可伪造性、盲性和无条件匿名性。

Provably secure certificateless blind ring signature scheme

To eliminate complex certificate management of certificate based public key cryptography and avoid the inherent key escrow problem of identity based public key cryptography, by using bilinear pairing technique, this paper proposed an efficient certificateless blind ring signature scheme by combining blind ring signature with certificateless cryptography in the random oracle model. In the end, it proves that this scheme satisfies the security of existential unforgeability against adaptive chosen message attacks, blindness and unconditional anonymity in terms of the hardness of k-CAA and mICDH problem, so it points out that this scheme is secure and efficient.