基于身份的移动网动态可认证群组密钥协商协议

群组密钥协商是保证无线网络群组安全通信的重要工具之一。2007年,Tseng等提出一种适合无线移动网络的高效群组密钥协商协议。对Tseng协议安全性进行分析,发现Tseng协议不具备认证性,不能抵御主动攻击。因此,通过改进Tseng协议,提出一种新的动态可认证群组密钥协商协议。该协议基于身份的公钥密码体制,降低了建立和管理公钥基础设施的代价;同时,协议支持节点间的相互认证。分析结果表明：协议满足群组密钥所要求的安全准则,降低了普通节点的计算和通信成本。

Identity-based Dynamic Authenticated Group Key Agreement Protocol for Mobile Networks

Group key agreement is one of the important means to ensure group secure communication for wireless networks. In 2007, Tseng et al. proposed an efficient group key agreement protocol in wireless mobile environment. In this paper, by analyzing the security of the Tseng''s protocol, the authors have found that the Tseng''s protocol is not an authenticated protocol and cannot resist active attacks. By improving the Tseng''s protocol, the authors propose a new dynamic authenticated group key agreement protocol. Due to using ID-based public key, the expense of building and managing public key infrastructure is decreased, and the protocol supports mutual authentication between nodes. The analysis results show that this protocol can satisfy the security rules of group key, meanwhile, reduce the computation and communication cost of the ordinary nodes.