文中分析了目前主流的H.264 SVC 标准所采用的可分级视频编码技术，

根据视频分级编码特点选取关键信息进行分层加密，实现不同级别的视频加密。同时，所提方案采用了序列密

码进行加密，具有较高的安全性。-This paper analyzes the current mainstream standard adopted H.264 SVC scalable video coding technology,

Select the encryption key information were stratified according to the characteristics of video hierarchical coding to achieve different levels of video encrypted. Meanwhile, the proposed scheme uses a sequence of dense

Encryption code, has a high safety.