一种适用于大型动态群组的密钥管理方案  

Key-management Scheme for Large Dynamic Group

作　　者：武涛[1] 郑雪峰[1] 姚宣霞[1] 雷雪梅[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083

出　　处：《小型微型计算机系统》2008年第4期639-642,共4页Journal of Chinese Computer Systems

摘　　要：组播是一种基于组的有效的数据传输方式,安全组播对许多组播应用程序非常必要.如何在一个大型动态多播群组中实现高效的安全组播,是一个具有挑战性的难题.提出一种新的基于逻辑密钥树的密钥管理方案,该方案集中使用了单向函数,XOR运算,伪随机函数等,大大降低了组控制器的存储量,并且提高了密钥更新的效率.与现存的其他基于逻辑密钥树的方案相比,具有明显的优越性,更适用于大型动态多播群组.Multicast is an efficient communication paradigm to many group-oriented applications in the Internet. In order to offer secrecy for multicast applications, the traffic encryption key has to be updated in time whenever a user joins or leaves the group. It is a big challenging problem to distribute and update the group key efficiently in a large dynamic group. In the paper, a new key-management scheme based the logical-key tree is proposed, which introducing the one-way function.XOR operation and the pseudo-random function.reducing the key storage requirement of a group controller and optimizing the key updating communication. It is proved that the new approach has obvious superiority than that of the previously proposed schemes and is more suitable for large dynamic group.

关 键 词：组播通信 安全组播 组密钥管理 单向函数 XOR运算 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]