个性化DRM和数字水印技术

INDIVIDUALIZED DRM AND DIGITAL WATERMARKING TECHNOLOGY

提出了一种视频的个性化的数字版权保护和数字水印技术,针对每个用户采用不同加密密钥和水印信息,提高了安全性和事后追查能力。把音视频文件分离为非关键数据文件和小数据量的关键数据文件,对关键数据进行个性化加密和嵌入数字水印来降低计算量和存储量问题。前端系统把多版本的加密关键数据文件和共同的非关键数据分别存放和发布,客户端播放器把两种数据流进行同步、解密和合成,然后解码播放。

A technology of individualized DRM and digital watermarking for video is put forward. Its difference from normal technologies is that the encrypting key of DRM and digital watermarking embedded in video are unique for each user, so safety is improved and the ability of tracking is gotten, Then the selective encryption is used to reduce the quantity of computation and storage,in which only the key frames separated out from the audio and video files as small data sets file are embedded with watermark and encrypted in individualization but not those nonkey data file frames. On the service side, the encrypted copies of key frames and a copy of non-key frames are stored and published separately. The user＇s player decrypts its key frames stream, then synchronizes with the non-key frames stream and combines them into a stream for decoding and playing.