安全群组通讯在流媒体传输方面的应用

Secure Group Communication Applied on Media Stream Transport

随着网络的快速发展,基于组的通讯已经成为一种重要的通讯机制,它可提供可靠的、顺序的消息传送以及提供组成员关系服务。安全群组通讯系统(SGCS)构建于群组通讯系统之上,为成员间传输的消息提供安全保证。安全群组通讯可应用于许多领域,文中阐述其系统结构、工作原理,介绍如何将其应用在流媒体传输方面,在通讯过程中传输音频流和视频流,从而实现一个安全多媒体会议的原型系统。实验结果表明,该原型系统在局域网或宽带网实验环境中运行稳定,音频流和视频流均非常流畅;在拨号广域网中设置较低的会话质量同样可以达到安全多媒体会议的通讯效果。

With the fast development of Internet, model of communication based on group has become very important, which provides reliable and ordinal message transport, and relation service among members in the group. Secure group communication system(SGCS) is constructed upon group communication system. It guarantees the safe message transport among all members in the group. SGCS can be applied in various area. This paper gives the system structure and work principle of SGCS, and shows how to apply it on multimedia stream transport. With it a prototype of secure multimedia meeting system is easy to get. The result of experiment implies that the system, performs well on LAN and broad band networks,which can transfer video and audio stream fluently. The system also provides secure communication on WAN if set comparably low session quality.