计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (22): 102-104.

• 网络、通信、安全 • 上一篇    下一篇

对二次剩余构造的签名方案的分析与改进

薛荣红,张建中   

  1. 陕西师范大学 数学与信息科学学院,西安 710062
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-08-01 发布日期:2011-08-01

Analysis and improvement of signature scheme based on quadratic residues

XUE Ronghong,ZHANG Jianzhong

  

  1. College of Mathematics and Information Science,Shaanxi Normal University,Xi’an 710062,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-08-01 Published:2011-08-01

摘要: 分析了Chai等提出的利用二次剩余构造的基于身份的签名方案,指出该方案由于使用某些参数,使方案不仅效率低,而且没有有效利用二次剩余。指出方案存在安全问题,给出了两种攻击方法。攻击者可以通过乘法攻击以及构造幂次攻击伪造有效的密钥。为了解决这些问题,提出了改进方案,改进后的方案有效解决了原方案存在的问题。

关键词: 数字签名, 基于身份签名, 二次剩余, 大整数分解

Abstract: Analysis of identity-based signature scheme based on quadratic residues proposed by Chai et al is given.Due to using certain parameters,the results show that the scheme not only has the problems of low efficiency,but also doesn’t make good use of quadratic residues.They also show that there are security issues in the scheme.Two attacks on the scheme are given.The attacker can forge signing keys by multiplying and constructing powers.In order to solve these problems,the original scheme is improved.The improved scheme solves the problems in the original scheme efficiently.

Key words: digital signature, identity based signature, quadratic residues, factoring