基于知识签名的前向安全数字签名方案

Knowledge Signature-Based Forwardsecure Signature Scheme

对带系数的离散对数知识签名、前向安全数字签名作了深入的研究,探讨分析了吴克力与刘亚丽等的前向安全数字签名方案,并参照知识签名算法提出了新方案.在保持公钥不变的前提下,将当前密钥隐藏在签名算法中,保证了密钥的安全.同时将签名者的身份隐藏在知识签名中,也保证了签名者的身份安全.签名的前向安全性基于离散对数和模合数平方剩余难题,以及散列函数的单向性,分析表明该方案具有更高的安全性.

With a in-depth study of the discrete logarithm signature of knowledge with a coefficient and forward-secure digital signature,a knowledge signature-based forward secure signature scheme is proposed against the signature schemes proposed by Wu Keli and Liu Yali.With public key in maintaining the same premise and the current key signature hidden in the algorithm,the security of the keys are guaranteed.Meanwhile,the identity of the signer hidden in the knowledge signature guarantees the security of the signer＇s identity.The forward security is based on discrete logarithm and the number of square residual problems,together with one-way hash function.The analysis shows that the proposed scheme is more secure.