Research on DCT-based Video Encryption under H.264
H.264标准中基于DCT的视频加密研究

With the development of information science and the computer technology,the application of video in commerce on the Internet,such as video on demand or video on line has become more and more common.At the same time,the demand for security becomes more and more urgent.According to the characteristics of the latest video compression standard H.264,this paper proposes several DCT-based encryption algorithms,conducts simulation on two standard video sequences,and analyzes and compares the quality of those proposed algorithms.The experimental results show that the proposed algorithms have no impact on the compression efficiency and have gained good encryption results with low complexity.The simulation results are all tested on JM(joint model,version 7.3) reference software,which is especially programmed for testing the coding standard of H.264.