AES在MPEG-4视频加密中的应用

MPEG-4视频压缩在无线视频监控、网络视频等方面已得到广泛应用。但由于其传输路径的开放性,急需一种安全保护措施来保证MPEG-4视频信息的安全。文章利用MPEG-4的编码结构,提出利用一种基于高级加密标准(AES)的输出反馈模式(OFB)对MPEG-4少量视频数据进行加密的算法,只需很小的开销就能使视频信息不可见和不被轻易获取。文章介绍了这种加密算法,分析其实际效果和开销,讨论了安全性能以及对抗误码的鲁棒性,并基于这种加密算法的特点讨论了其应用策略。

Application of AES in encrypting MPEG-4 video

MPEG-4 has been applied in many fields, such as wireless video monitoring and network video, because of the opening of transmitting channels, so we need the security strategy urgently to guarantee the safety of MPEG-4 video information. In this paper, we make use of MPEG-4 video compression structure, and present one encryption algorithm, which is only used to a few video data, based on AES(Advanced Encryption Standard)OFB(Output Feedback) mode in detail. Although we only encrypt small parts of the video data by the algorithm above, the MPEG-4 video information will be protected to avoid illegal acquisition. At last the encryption algorithm is introduced, the encrypting results and spending as well as its security performance and robustness against error code are given in this paper. And based on its characteristics its application strategy of encryption algorithm is also discussed.