【摘要】 <正> 1 引言 1.1 多播的应用领域和多播的安全问题大多数的网络应用是基于客户机/服务器的计算模式并且利用单播(或点到点)分组投送。另一方面,现在很多的应用(如远程会议、多媒体远程教育、实时信息服务、视频点播、分布交互模拟、网络游戏、以及协同工作等)却是基于多播通信模式。即是说,分组从一个更多还原

【Abstract】 Many emerging applications (e- g. , teleconference, real-time information services, pay per view,distributed interactive simulation,and collaborative work) are based upon a group communications model. As the process of proliferation of the Internet progresses,multicast applications are coming to be deployed for mainstream use,and the need to multicast technology will become urgent. As a result,securing group communication(i, e. .providing confidentiality ,integrity and authenticity of message delivered between group members) will become a critical networking issue. Now,the research of multicast technology has become a new thriving academic field. Many main results converge to such fields as the multicast routing,the flow control,the congestion control and reliable multicast. But the results referred to multicast security are very few,especially in domestic academia. In this paper,we present some main results in the field of multicast security. At the same time,we give a brief view of our solution scheme based on subgroup secure controllers which is superior to the Iolus System and the solution of WGL in scalability and performance. In a word,this paper reflects the new achievements in the field of multicast security.更多还原