基于LKH树的动态多播群组批密钥更新方案的优化设计  

Optimization Design of the Batch Re-Keying Scheme for Dynamic Multicast Groups Based on the LKH Tree

作　　者：韩秀玲[1] 王行愚[2] 

机构地区：[1]东华大学信息学院,上海200051 [2]华东理工大学,上海200237

出　　处：《计算机工程与科学》2005年第8期20-23,共4页Computer Engineering & Science

基　　金：国家自然科学基金资助项目(69974014);教育部重点学科资助项目(00053)

摘　　要：逻辑密钥层次(LKH)方案是目前多播领域中最有效的密钥管理协议。然而,由于其集中式访问控制和密钥分配方式,限制了组规模的进一步扩展。根据文献[1,2]关于MBone的多播组成员行为的研究和监测结果,援引批处理和优化控制的思想,本文对LKH树的方案进行了改进和扩展,设计了一个基于LKH树的优化批密钥更新方案,并给出了它的协议和算法。分析表明,该方案克服了原有协议的缺点,增加了组规模的可扩展性,因而适用于大型的动态多播环境。The logical key hierarchy （LKH） scheme is the most efficient protocol for key management in the field of multicast at present. However, the modes of centralized access control and key distribution limit the extension of their group sizes. In this paper, according to the studies of [1,2] about the behaviors of multicast group members in the MBone,and the ideas of batch processing and optimization control, an optimized batch re-keying scheme and its algorithm are designed. This scheme overcomes the demerits of the existing protocols and improves the scalability of the group size, and therefore applies to large and dynamic multieast groups.

关 键 词：多播 密钥管理 LKH树 批密钥更新 优化 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]