高效可证明安全的基于证书的代理环签名方案

An efficient and provably secure certificate-based proxy ring signature scheme

将密钥生成中心(key generating center,KGC)为用户生成的证书作为用户公钥的一部分,设计了一个基于证书的代理环签名方案.此方案安全性是基于计算Diffie-Hellman问题的,可有效地避免替换公钥攻击,与目前效率最高的可证明安全的无证书代理环签名方案相比,此方案的效率提高了50%.鉴于此方案的安全性和高效性,它可广泛应用于移动代理和电子政务等系统.

In this paper,an efficient and provably secure certificate-based proxy ring signature scheme is proposed,in which the certificate generated by the KGC(Key Generating Centre)is considered as part of the user’s public key.The security analysis shows that the signature scheme is based on the computational Diffie-Hellman problem and it can effectively address the problem of public key replacement attack.Moreover,compared with the most efficient provably secure certificate free proxy ring signature scheme,the analysis shows that the efficiency of the proposed scheme is increased by 50%.In view of the security and efficiency of the proposed scheme,it can be applied to mobile agent systems and electronic government affairs,etc.