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。
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.
出处
《计算机工程》
CAS
CSCD
北大核心
2011年第3期132-133,136,共3页
Computer Engineering
基金
湖南省教育教学改革研究基金资助项目(ZJGB2009010)
关键词
信息安全
群密钥协商
基于口令的认证
字典攻击
information security
Group Key Agreement(GKA)
password-based authentication
dictionary attack