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1 引言随着分布式多媒体及分布式处理的发展,多播逐渐成为构建面向群组服务平台的一种重要通信模式,并且得到了成功的应用。然而,目前的多播平台对于安全问题考虑得比较少,在一定程度上存在着安全隐患。例如,在Internet及ATM等集成网络中,多播流量与其他网络流量共享网络资源。这样虽然能够快速地建
1 Introduction With the development of distributed multimedia and distributed processing, multicast has gradually become an important communication mode for building a group-oriented service platform and has been successfully applied. However, the current multicast platform for security issues to consider relatively small, to a certain extent, there are security risks. For example, in integrated networks such as the Internet and ATM, multicast traffic shares network resources with other network traffic. Although this can be quickly built