一种高效的基于身份的组密钥协商协议的改进

Wei Yuan, Liang Hu, Kuo Zhao, Hongtu Li, Jiang-feng Chu, Yuyu Sun
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引用次数: 3

摘要

2009年曾平等人在ID-AGKA协议的基础上提出了一种新的组密钥协议,该协议采用全二叉树结构,每个树节点代表一个用户。他们的协议支持用户随时加入或离开群组,并且会话密钥会随着用户的动态变化而变化。本文指出,曾平等人提出的组密钥协议是未经认证的,容易被伪造和修改。在此基础上提出了一种基于BR安全模型的攻击者强制组成员接受修改后的会话私钥的方法。因此,这意味着曾平等人的协议不能满足隐式密钥认证和密钥控制的属性。最后,我们提出了一个改进的协议来克服这个问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improvement of an Efficient Identity-Based Group Key Agreement Protocol
In 2009, Zeng Ping et al. proposed a new Group Key Agreement protocol Based on the ID-AGKA protocol which uses full binary tree structure and each tree node represents a user. Their protocol support users to join or leave the group at any time and the session key will be changed with the users' dynamic changes. In this paper, we point out that Zeng Ping et al.'s Group Key Agreement protocol is non-authenticated and easy to be forged or modified. Then we give a method that attacker can force all group members accepted the modified session private key in BR security model. So, It means that the Zeng Ping et al.'s Protocol can not meet the attribute of implicit key authentication and key control. Finally, we propose an improved protocol to overcome this problem.
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