基于RSA的强前向安全的数字签名

本文提出了一种基于RSA密码体制的数字签名改进方案，该方案中假设每个签名用户拥有各自的公私钥对，公钥确定后，设置特定的私钥进化算法，同时加入扰乱因子以增加签名内容的混乱性，加入时间戳来保证即使签名密钥泄露，攻击者也无法伪造当前时间段的签名以及其前后的签名，从而提高签名密钥的安全性。理论分析表明，该方案中私钥进化算法满足前向安全性和后向安全性，因此签名方案也满足前后向安全性。

A Strong Forward Security Digital Signature Scheme Based on RSA

Strong forward--secrecy digital signature can prevent the loss of leakage of signature keys and minimize losses. In actual exploit code, attackers could easily conjecture the current time segment before and after signature private keys in accordance with current signature keys. In view of this hidden danger, a digital signature scheme based on the RSA is introduced. The scheme supposes that each signature user has own public and private keys, when public keys fixed, it sets a specific evolutionary algorithm of private keys, and adding disturb factors to increase the confusion of message＇s group signature. The attackers could also not generate a forged signature of previous time periods and after a communication timestamp is added, even the key--exposure is on the work. This evolutionary algorithm satisfies in forward and backward security and so does the signature scheme.