基于椭圆曲线和三叉树的群组密钥协商方案  

AN ELLIPTIC CURVE CRYPTOGRAPHY AND TRIPLE TREE BASED GROUP KEY AGREEMENT SCHEME

作　　者：毛江栋[1] 张来顺[1] 郭渊博[1] 张婷 

机构地区：[1]解放军信息工程大学电子技术学院 [2]61081部队

出　　处：《计算机应用与软件》2010年第7期30-32,36,共4页Computer Applications and Software

基　　金：国家863计划项目(2007AA01Z405);国家自然科学基金项目(60503012)

摘　　要：将椭圆曲线密码体制和三叉树引入到群组密钥协商中,提出了一种基于椭圆曲线和三叉树的群组密钥协商协议,由于无需向群组所有其它成员广播消息,其计算开销和通信开销均只有O(nlog3n)。采用了用初始协商的密钥值加密随机数并产生杂凑值的方法使三叉树内部结点间也能进行安全的协商;当有群组成员变动时,通过发起者更新其随机数来提供协议的前向保密性和后向保密性,因此该方案适合于较大规模的动态群组。By introducing elliptic curve cryptography and triple tree into group key agreement schemes,an elliptic curve and triple tree based group key agreement protocol is proposed.As no need to broadcast the news to all of other members in the group,the calculation and communication costs are only O（nlog3 n）.Using initial consultations key value to encrypt random numbers and then generate their hash values,the internal nodes of triple tree are also able to consult securely;when there are changes in group members,the forward and backward confidentialities of the agreement would be provided trough updating the random number by sponsors,so the program is suitable for dynamic group of relatively large-scale.

关 键 词：动态对等群 群组密钥协商 椭圆曲线 三叉树 密钥更新 

分 类 号：TP311.12[自动化与计算机技术—计算机软件与理论]