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计算机工程 ›› 2007, Vol. 33 ›› Issue (08): 148-149. doi: 10.3969/j.issn.1000-3428.2007.08.050

• 安全技术 • 上一篇    下一篇

一个成员撤消算法的安全缺陷

王凤和1,2,胡予濮2,王春晓3   

  1. (1. 泰山学院数学系,泰安 271000;2. 西安电子科技大学计算机网络与信息安全教育部重点实验室,西安 710071; 3. 山东建筑工程学院数理系,济南250014)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-04-20 发布日期:2007-04-20

Security Flaw in Revocation Algorithm

WANG Fenghe1,2, HU Yupu2, WANG Chunxiao3   

  1. (1. Dept. of Mathematics, Taishan College, Taian 271000; 2. Key Lab of Computer Networks and Information Security, Ministry of Education, Xidian University, Xi’an 710071; 3. Dept. of Math. and Phys., Shandong Institute of Architecture and Engineering, Jinan 250014)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-04-20 Published:2007-04-20

摘要: 2003年陈等提出了一个高效的群成员撤消算法,与已有方案比较该方案无疑是高效的,但该文的研究表明陈的方案还存在较大的安全缺陷,针对这一缺陷给出了一种攻击方法,使得一个已经被撤销的群成员仍然可以利用这种攻击继续生成合法签名。从而说明该撤消算法是不安全的。

关键词: 攻击, 撤消, 群签名, ACJT方案

Abstract: The paper analyzes the security of an efficient revocation algorithm which was proposed by Chen in 2003. Security flaw is identified in their scheme. The paper proposes an attack to this flaw, it shows a deleted member can forge valid group signature. So their scheme is insecure.

Key words: Attack, Revocation, Group signature, ACJT scheme