摘要： 通过对一个基于中国剩余定理的群签名方案进行密码学分析，发现其安全缺陷。针对该缺陷提出一种改进的群签名方案，在不改变群成员密钥的前提下，有效实现群成员的加入与撤销。分析结果表明，该方案安全可靠，具有较高实用性。

关键词: 群签名, 中国剩余定理, 群成员撤销, 伪造攻击

Abstract: Cryptanalysis of a group signature scheme based on Chinese remainder theorem shows that it exists security flaws. Aiming at these flaws, this paper puts forward an improved group signature scheme. It realizes effective participation and revocation of group members under the condition that keep the group member secret key unaltered. Analysis results show that this scheme is secure and practicable.

Key words: group signature, Chinese remainder theorem, revocation of group member, forgery attack

中图分类号: 

• TP309