组播服务用户控制机制综述

组播技术以其支持大规模的一对多、多对多通信的特点，成为目前网络通信领域研究的热点。然而其开放的通信机制在提供高效、便利的同时，也带来了一系列的安全问题。本文分析了组播模型的基本特性所带来的安全弱点。介绍了建立组播服务用户控制机制的必要性，详细阐述了组播服务用户控制机制中四个领域的研究内容：接收者访问控制、组播源访问控制、组播源鉴别和组内信息区分技术。随着组播服务逐步的商业化运行，建立一套完善的群组用户控制机制成为十分迫切的任务，并且有着广阔的应用前景。

Survey of User Control about Multicast Services

Multicast provides an efficient transport mechanism for one-to-many and many-to-many communication and it becomes one hot research area- The open properties that make multicast attractive, however, also bring security problem. The vulnerabilities of security that made by multicast properties are classified, and the necessary of multicast user control is presented in this paper. Then the focus is on the four research area about multicast user control: receiver access control,source access control,source authentication and division of group information. With the commercial development of multicast, a perfect multicast user access control mechanism is needed by the ISPs to manage multicast services.