基于Guillou-Quisquater体制的前向安全数字签名方案

A Forward-Secure Digital Signature Scheme Based on Guillou-Quisquater System

对具有前向安全的一种数字签名方案进行了密码分析,发现该方案存在安全隐患,不具有前向安全性。本文提出了一种新的基于Gu illou-Qu isquater体制的前向安全数字签名方案,新方案主要利用强RSA假定,通过签名私钥的有效更新来实现前向安全性。分析表明新方案具有较高的安全性。

Througn the cryptanalysis of a forward-secure digital signature scheme,it is found that the scheme has security leak and no forward security.A new forward-secure digital signature scheme based on GuillouQuisquater signature system is given,which achieves the property of forward security by the efficient update of signed secret key.The analysis shows that the new scheme has higher security.