从数字媒体有条件接收系统面临的新问题出发,对数字视频加密、密钥管理、盗版追踪和数字媒体内容保护四个方面技术存在的问题、研究现状进行了介绍和分析,并对各项技术的发展趋势进行了阐述。
This paper analyzed the problems faced by digital multimedia conditional access system, introduced the current survey on digital video encryption,broadcasting encryption, tracing traitor and multimedia content protection,and gave the unresolved topics and the trends of the development either.