基于超球形的多播密钥更新方法  

A new method of secure multicast rekeying based on hyperball

作　　者：陈少军[1] 冯年荣[1] 许勇[1] 李杰[1] 

机构地区：[1]安徽师范大学数学计算机科学学院,安徽芜湖241000

出　　处：《安徽工程科技学院学报（自然科学版）》2007年第3期48-50,共3页Journal of Anhui University of Technology and Science

基　　金：安徽省教育厅自然科学基金资助项目(2005kj009zd);安徽省软科学基金资助项目(06035021);安徽师范大学专项基金资助项目(2005bzx17)

摘　　要：多播安全要确保所有参加多播的成员安全地共享同一组密钥,当有成员加入或离开时需要及时更新组密钥.当组播规模很大时,更新组密钥的效率是一个重要的问题.在研究密钥更新的基础上,提出一种基于超球形的多播密钥更新模型.该模型充分利用成员之间既有独立性又有协同性的特点,解决密钥更新问题,该方法更新效率高,组管理器储存密钥总数少.算法较LKH和OFT有优势.Multicast security ensures that all members of a multicast group share the same set of keys safely and when some members join or leave, new keys must be updated. When the size of the multicast is large, the efficiency of rekeying is a very important problem. Based on the research of rekeying, this article presents a new model and its algorithm based on secure multicast rekeying of hyperball. This model completely posesses the property of the independence and cooperation between members to resolve the problem of rekeying. This method is more efficient and the number of keys in group manager is much less. The algorithm is better than LKH and OFT.

关 键 词：多播安全 密钥更新 超球形 密钥树 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]