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计算机工程 ›› 2011, Vol. 37 ›› Issue (3): 132-133,136. doi: 10.3969/j.issn.1000-3428.2011.03.047

• 安全技术 • 上一篇    下一篇

改进的基于口令的群密钥协商协议

胡红宇1,2,李军义2   

  1. (1. 湖南永州职业技术学院计算机系,湖南 永州 425000;2. 湖南大学计算机与通讯学院,长沙 410082)
  • 出版日期:2011-02-05 发布日期:2011-01-28
  • 作者简介:胡红宇(1971-),男,副教授、硕士研究生,主研方向:网络技术,信息安全;李军义,副教授、博士
  • 基金资助:
    湖南省教育教学改革研究基金资助项目(ZJGB2009010)

Improved Password-based Group Key Agreement Protocol

HU Hong-yu1,2, LI Jun-yi2   

  1. (1. Computer Department, Hunan Yongzhou Vocational Technology College, Yongzhou 425000, China; 2. School of Computer and Communication, Hunan University, Changsha 410082, China)
  • Online:2011-02-05 Published:2011-01-28

摘要: 群密钥协商协议是保证后续群组安全通信的重要手段之一。为此,研究Byun和Lee提出的基于口令的群密钥协商协议,指出该协议不能抵抗不可检测的在线字典攻击。基于这个发现,对该方案进行改进,提出一种新的群密钥协商协议。安全性分析表明,该协议可以抵抗基于口令的群密钥协商协议的常见攻击。

关键词: 信息安全, 群密钥协商, 基于口令的认证, 字典攻击

Abstract: Group key agreement protocol is an important mechanism to ensure the security of subsequent communication. This paper researches a password-based Group Key Agreement(GKA) protocol proposed by Byun and Lee and finds that this protocol is vulnerable to undetectable on-line dictionary attacks. Based on this finding, it improves this protocol and presents a new GKA protocol. Security analysis shows that the protocol is resistant to the attacks available for password-based GKA protocols.

Key words: information security, Group Key Agreement(GKA), password-based authentication, dictionary attack

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