【摘要】 基于Pairing计算和密钥树提出了一种高效的动态群密钥协商方案.通过引入群公钥证书并在群密钥中结合群以及成员的长期密钥和临时密钥,提供了隐含密钥认证,以有效地对抗中间人攻击.此外,该方案的设计思想可以作为一种通用方法,把可认证两方Diffile-Hellman协议扩展到群环境.更多还原

【Abstract】 To meet the increasing popularity of secure group-oriented computing, this paper proposed an efficient group key agreement scheme-PAGKA. It combines the merit of key tree and Pairings-based key exchange, and involves members’ long-term keys and session random in the group key to avoid dependence on signature or MAC. The PAGKA protocol suite is communication efficient, and has the following cryptographic properties such as key independence, implicit key authentication, perfect forward secrecy and resistance to known-key attacks and man-in-the-middle attacks. The idea in PAGKA can be used as a general method to extend authenticated two-party key agreement protocol to group settings.更多还原