一组新的Ad Hoc快速组密钥协商协议  

Fast group key agreement protocols in Ad Hoc networks

作　　者：钟欢[1] 许春香[2] 马华[3] 

机构地区：[1]西安电子科技大学经济管理学院 [2]电子科技大学计算机学院,四川成都610054 [3]西安电子科技大学理学院,陕西西安710071

出　　处：《西安电子科技大学学报》2007年第4期659-663,共5页Journal of Xidian University

基　　金：现代通信国家重点实验室基金资助(9140C1107010604);华为公司科技基金资助(YJCB2006053DC)

摘　　要：基于离散对数的安全性,提出一个能在小型Ad Hoc网络中快速建立组密钥的FGKA(FastGroup Key Agreement)协议.该协议利用组织者选择的秘密参数,结合所有成员的密钥贡献信息产生组密钥值.再利用密钥生成树建立方法构造k叉树结构,将上述协议扩展为AT-FGKA(ArbitraryTopology-FGKA)协议,该协议能适应任意拓扑结构,并能满足大型Ad Hoc网络的需要.描述了相应的成员加入与退出的协议,并对协议进行了安全性分析和效率比较,结果表明FGKA具有小的通信量和计算量,AT-FGKA能有效降低通信开销.Based on the security of the discrete logarithm, an FGKA （fast group key agreement） protocol, that fits for small Ad Hoc networks, is presented. It combines contribution information of all members with the secret value selected by the sponsor. To fits for the large Ad Hoc network, the above protocol is extended to the AT-FGKA（Arbitrary Topology-FGKA） protocol which can be adapted to an arbitrary network by using the k-ary tree. Finally, dynamic member maintenance protocols as well as security analysis and efficiency comparison are described, which shows that the former has little communication and computation, and that the latter can reduce communication cost effectively.

关 键 词：密钥协商 组密钥 密钥管理 Ad HOC 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]