一种动态的可认证的群密钥协商方案  

A Dynamic Authenticated Group Key Agreement Scheme

作　　者：王勇[1] 李明[2] 曹元大[1] 

机构地区：[1]北京理工大学软件学院,北京100081 [2]上海交通大学计算机科学与工程系,上海200030

出　　处：《计算机应用研究》2005年第9期118-120,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60203012)

摘　　要：为了使群密钥协商协议能够抵抗主动攻击,提出了一种高效的可认证方案。该方案以一种可认证的两方密钥协商协议为基础,首先提出了该协议的无认证版本,然后通过二叉树把两方认证版本、一方认证版本和无认证版本结合起来。该方案提供了隐含密钥认证和完善前向保密等安全属性。其通信开销是常数,计算开销与成员数目的对数成正比。In order to make group key agreement protocol to resist against active attacks, an effective authenticated scheme is presented. The scheme is based on an authenticated two-party key agreement protocol. First, an unauthenticated version of the protocol is presented. Then two-party authenticated version, one-party authenticated version and unauthenticated version are combined using binary key tree. The new scheme provides implicit key authentication and perfect forward secrecy etc, Its com- municational cost is constant and its computational cost is in direct ratio to the logarithm of the number of group members.

关 键 词：群密钥协商 隐含密钥认证 MQV 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]