Encryption of Video Main Frames in the Field of DCT Transform Using A5/1 and W7 Stream Encryption Algorithms

Abstract

Recently, creating security in multimedia systems involving video has become one of the main needs in commercial and military usages. The most important traits of video frames are simultaneousness of frames and high volume of information. Considering these features, A5/1 and W7 stream ciphers are used for video main frames in the field of selective encryption of each DCT transform coefficient.In addition, a suitable method is expressed in order to select the encryption method of DCT transform coefficients by the stream algorithms. The simulation results of MATLAB software show that this method is suitable for multimedia security in terms of both security and execution speed of the algorithm. © 2014 The Author(s).