Secure video transcoders based on correlation preserving sorting algorithm

This paper proposes a new approach for performing the secure video transcoding based on correlation preserving sorting algorithm. The idea is to perform the transcoding operation without decrypting the encrypted video content. Correlation preserving sorting algorithm is adopted here to encrypt the video data. In this method, the first frame and the frames at which the correlation coefficient between the current frame and the previous frame is less than a threshold value are transmitted through a secure channel. The video frames are sorted and the sorted frames are encoded by using any video coding standard. It is proposed to perform the transcoding operation on the sorted frames of the video. The proposed secure video transcoding system is validated through the popular video coding standard s MPEG2 and H.264. From experiments, it is p roved that the proposed system gives better compression performance and security with minimal complexity of operations.