基于改进的可验证的强前向安全环签名方案研究

摘要

Forward-security digital signature has the defect that it can not guarantee the backward security of digital signature. Based on a forward-security ring signature algorithm, we propose a verifiable strong forward-security ring signature scheme. It has the means of two private keys updating, one private key updating is used for ensuring the forward security while the other is used for ensuring the backward security. Security analysis shows that the new scheme has strong forward security, unconditional anonymity, verifiability and can resist forging attack.%前向安全数字签名的不足是无法保证数字签名的后向安全性.在一个前向安全环签名算法的基础上,采用双私钥更新的方法,一个私钥更新用来保证前向安全性,另一个私钥更新用来保证后向安全性,提出一种可验证的强前向安全环签名方案.安全性分析表明,新方案具有强前向安全性、无条件匿名性、可验证性和抗伪造性.