Security Analysis of Broadcaster Group Key Exchange Protocols  

作　　者：LI Li ZHANG Huanguo 

机构地区：[1]School of Software, Wuhan University, Wuhan 430072, Hubei, China [2]School of Computer, Wuhan University, Wuhan 430072, Hubei, China

出　　处：《Wuhan University Journal of Natural Sciences》2006年第6期1577-1580,共4页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foun-dation of China (90104005 ,60473023) ;the National High Tech-nology Research and Development Programof China (863 Program)(2002AA41051)

摘　　要：Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of protocols as broadcaster group protocols. It points out two attacks on this kind of protocols. The first attack can be avoided by using fresh values in each action during one session of the group protocol. The second attack should be related with concrete application. It also proposes a dynamic key agreement protocol as an example of solutions at the last part of the paper.Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of protocols as broadcaster group protocols. It points out two attacks on this kind of protocols. The first attack can be avoided by using fresh values in each action during one session of the group protocol. The second attack should be related with concrete application. It also proposes a dynamic key agreement protocol as an example of solutions at the last part of the paper.

关 键 词：group key exchange protocol broadcaster group protocols  dynamic security 

分 类 号：TP918.2[自动化与计算机技术]