基于伪随机序列的宏块置乱视频加密方案

MacroBlock Permutation Video Encryption Approach Based on Pseudo-random Sequence

研究了基于宏块置乱的视频数据加密技术。该技术首先采用m序列来产生一个超长周期的伪随机序列,然后用该序列顺序生成完全不重复的宏块置乱矩阵,最后对每个视频帧依次用不同的置乱矩阵置乱。实验结果表明,该方案加密速度快效果好,并且安全性高,不会增加码流,不改变码流格式和结构特征。

This paper presents a video encryption approach by MacroBlock permutation. This approach first obtains a very long periodic pseudo-random sequence by m-sequence, then generates some not repeat MacroBlock permutation matrix using this sequence, and permutates each video frame with different permutation matrix. It is shown that this approach meets the requirements of applications because it provides overall high security, high speed encryption, size preservation, and format compliancy.