一种基于混合策略的动态组播密钥管理方案

组播密钥管理是当前组播安全研究的热点问题。在分析现有方案的基础上，考虑一种混合策略：将基于组的层次结构机制Iolus与基于密钥层次结构机制LKH的优点结合起来，提出了一种适合大型动态组播的可扩展的分层分组方式的密钥管理方案。该方案有效地降低了密钥更新的代价，具有较高的效率与较好的可扩展性．适合于解决大型动态组播的密钥管理问题。

A Key Management Scheme Based on Hybrid Strategy for Dynamic Multicast

Key management for multicast is an hot problem that is researched in multicast security. On the basis of existed schemes,a hybrid strategy is considered,namely,the merits of Iolus scheme based on group hierarchy and LKH scehme based on key hierarchy are combined.A scalable key management scheme of delamination and grouping for large dynamic multicast is offered.This scheme improve the performance by reducing the costs of rekeying and high efficiency ,better scalability.It suits for a large dynamic multicast.