H ．264视频感兴趣区域加密算法

摘要

为了对视频的隐私区域进行加密，提出一种基于FMO和骑士巡游思想的H．264视频感兴趣区域加密的算法。首先确定视频中包含的感兴趣区域的范围，之后对感兴趣区域内部宏块的宏块类型参数使用SHA-1生成的流密码异或加密，并对条带组序号使用骑士巡游思想置乱加密。实验分析表明，该算法可以有效地保护视频中的隐私区域，并且可以在安全性、加密效率和编码效率取得较好的折中。%To protect the privacy in the video,this paper proposed an encryption scheme for region of interest (ROI)of H.264 video based on flexible macroblock ordering (FMO)and knight’s tour.First,it detected and extracted the region in the video.Then,it XOR encrypted the macroblock type parameters of ROI by using the SHA-1 generated stream cipher,and scram-bled slice group numbers of ROI by using the knight’s tour thinking.Experimental results and analysis show that the proposed scheme can effectively protect the private information of H.264,and can gain a good compromise among the security,encryp-tion efficiency,and coding performance.