关键词: 环签名, 代理签名, 代理环签名, 双线性对, 无证书

Abstract: Preserving all advantages of identity-based cryptography, certificateless public key cryptography eliminates the key-escrow problem, and also reduces the difficult problem of key management in traditional public key cryptography. Based on the merit of certificateless public key cryptography and combining the advantages of proxy signature and ring signature, the paper proposes a new efficient certificateless proxy ring signature scheme. This scheme solves all the problems of key escrow and certificate management, and satisfies the security requirements of a proxy ring signature scheme. Compared with existing schemes, the computational efficiency of the new scheme is obviously improved.

Key words: ring signature, proxy signature, proxy ring signature, bilinear pairings, certificateless