【摘要】 多播是一种基于 Internet的一对多或多对多的有效通信技术 ,随着各种大型多播应用的迅速发展 ,在 Internet上提供一个分布式的多播密钥管理协议成了一个亟待解决的重要课题 .首先分析了已有的一些典型协议 ,讨论了它们的优点及其存在的问题 ,在研究了大型动态多播群组的特点及密钥管理要求的基础上 ,对这些协议进行了综合和扩展 ,提出了一个具有分布式特点的大型动态多播群组密钥管理方案 ,并给出了它的算法 .对密钥服务器的存储量、加密计算量及通信量等的分析结果表明 ,该方案具有良好的有效性和可扩展性 ,适用于大型的多播群组更多还原

【Abstract】 Multicast is an efficient one-to-many or many-to-many communications technology based on Internet. As the emergence of many large multicast applications, providing a distributed multicast key management protocol on Internet will become a critical issue. Some typical protocols were first analyzed and their advantages and disadvantages were discussed, and then based on the research about the characteristics of large and dynamic multicast groups and the requirements of key management, these protocols were integrated and extended to form a distributed key management scheme for large and dynamic multicast group, at the same time, its algorithm was designed. It is shown that this scheme possesses a good efficiency and scalability and can be applied to large multicast groups.更多还原