Methods for encrypting and decrypting MPEG video data efficiently

Abstract

Multimedia data security is very important for multimedia commerce on the Internet such as video-ondemand and real-time video multicast. However, traditional cryptographic algorithms for data secrecy such as DES are not fast enough to process the vast amount of data generated by the multimedia applications to meet the real-time constraints required by the multimedia applications. How to incorporate cryptographic technology with digital image processing technology to provide multimedia security does not seem to be considered in the previous literatures. The main contribution of this paper is the idea of incorporating cryptographic techniques (random algorithms) with digital image processing techniques (image compression algorithms) to achieve compression (decompression) and encryption (decryption) in one step. One of our methods is almost as efficient as the existing video encoding and decoding process while providing considerable level of security without affecting the quality of image...