An efficient scalable key management scheme for secure group communication  

作　　者：张骏 谷大武 马范援 白英彩 

机构地区：[1]Dept. of Computer Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2006年第5期607-612,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China (Grant No.60203012) and Shanghai Rising-Star Program in Science and Technology (Grant No.02QD14027).

摘　　要：Several muhicast key management schemes such as those proposed by Wallner et al and Wong et al are based on a multilevel, logical hierarchy （or tree） of key-encrypting keys. When used in conjunction with a reliahle muhicast infrastructure, this approach results in a highly efficient key update mechanism in which the number of muhicast messages transmitted upon a membership update is proportional to the depth of the tree, which is logarithmic to the size of the secure muhicast group. But this is based on the hypothesis that the tree is maintained in a balanced manner. This paper proposes a scalable rekeying scheme---link-tree structure for implementing secure group communication. Theoretical calculation and experimentation show that this scheme has better performance than the tree structure and the star structure, and at the same time still keep the link-tree structure balanced.Several multicast key management schemes such as those proposed by Wallner et al and Wong et al are based on a multilevel, logical hierarchy (or tree) of key-encrypting keys. When used in conjunction with a reliable multicast infrastructure, this approach results in a highly efficient key update mechanism in which the number of multicast messages transmitted upon a membership update is proportional to the depth of the tree, which is logarithmic to the size of the secure multicast group. But this is based on the hypothesis that the tree is maintained in a balanced manner. This paper proposes a scalable rekeying scheme---link-tree structure for implementing secure group communication. Theoretical calculation and experimentation show that this scheme has better performance than the tree structure and the star structure, and at the same time still keep the link-tree structure balanced.

关 键 词：group security key management rekey 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]