基于H.264/AVC视频安全级别可分的加密方案

针对当前视频数据易复制、易篡改等特征,为了保护视频数据的安全,提出了一种基于H.264/AVC视频编码标准的视频加密方案.利用流密码加密简单、运算速度快等优点,采用高级加密标准(AES)的密码反馈模式(CFB)对H.264/AVC标准的序列参数集(SPS)、图像参数集(PPS)中能加密的语法元素和Ⅰ帧的码流进行加密.针对不同视频应用所需求的安全级别不同,在宏块级别选取一定数量的宏块进行选择性加密,得到安全级别可分的加密方案.最后,从算法的安全性、实时性、压缩率等方面进行分析.实验结果表明,该算法达到了视频内容安全的要求,满足实时性,并且减少了加密数据量.

Security Level Division Encryption Scheme For H.264/AVC Video

For the current video features such as easy to copy, easy to tamper with the data, this paper presents a video encryption scheme based on H.264/AVC video coding standard in order to protect the security of video data. Using stream cipher encryption advantages of simple, fast operation, the advanced encryption standard (AES) with the cipher feedback mode (CFB) is used on partial codewords of sequence parameter set (SPS), picture parameter set (PPS) and I frames. For different video applications demand different security levels, in the macro block level a certain number of macro blocks are selected to encrypt, gets security level division encryption scheme. Finally, we analyze the effective confidentiality , real-time, compression rate of this scheme. Experimental results show that our scheme meet video content security , the real-time, and reduces the amount of encrypted data.