Provably secure certificateless proxy ring signature scheme
可证安全的无证书代理环签名方案

Proxy ring signature, which enables a proxy signer to anonymously sign a message on behalf the original signer, has many advantages. This paper firstly proposed the strongest security model of certificateless proxy ring signature schemes and gave an efficient construction of certificateless proxy ring signature scheme using bilinear maps, with rigorous security proofs in the proposed strongest security model. The security of the scheme was based on the infeasibility of the computational Diffie-Hellman problem. The analysis shows that the new scheme satisfies the security requirements such as unconditional anonymity, strong unforgeability for a proxy ring signature scheme. Due to its security, efficiency and free of certificate management, it may have practical applications in electronic government affairs and mobile agent systems, etc.