【摘要】 对Ｈｅ 和Ｗｕ 基于二次剩余问题设计的快速数字签名方案（简称Ｈ－Ｗ 数字签名方案）的安全性进行了分析， 指出Ｈ－Ｗ 数字签名方案是不安全的， 并利用Ｍｏｒｒｉｓｏｎ－Ｂｒｉｌｌｈａｒｔ素因子分解算法， 给出一种具体的攻击方法更多还原

【Abstract】 We will analysis the security of the fast digital signature scheme, which is proposed designed by He and Wu based on quadratic residue (called H W digital signature scheme). And point out that the scheme is insecure. We also present an attack method, which is based on Morrison Brillhart’s factoring, on H W digital signature scheme.更多还原