A novel selective encryption algorithm of MPEG-2 streams

With the rapid development of internet technology and the huge amount of content transmitted along, the security of commercial TV broadcast and network-based multimedia applications (such as Video on Demand, Pay per View, High Definition Television and so on) becomes more and more important and challenging. Because the total video encryptions which encrypt all of the compressed video data cannot meet the real-time requirements, many selective encryptions come to days to reduce the processing data and time. But the encryption ratio of video data is still at a relatively high level. In this paper, we have proposed a new selective encryption algorithm which encrypts one thousandth or less of video data but with relatively high security level.