THREE DIMENSIONAL DCT AND TEMPORAL SECONDARY CLUSTERING BASED VIDEO STEGANOGRAPHY

Abstract

Security of data transmission is one of the important factors in communication between two parties. Steganography is a part of image processing that applies to the principle that hidden data is concealed in such a way that a part from the two communicating parties knowledge the procedure of hiding method. In this paper, a steganography method using the video file as a cover is used to hide secret data video benefiting from the insignificancy exploited by the temporal DCT domain in the video cover. A two-dimensional transform is applied on the video footage; the coefficients in the transform domain between the frames are gathered into groups. Another DCT transform is applied on the one dimensional array of each group. The secret binary data are embedded using a dynamic insertion strategy. Experimental results showed that the algorithm produces a high quality stego-video whereas, the Peak signal to noise ratio is reached to 46 dB for particular parameters. The normalized correlation is in the range of (0.999-1) which means that stego-video is highly correlated to the cover video. This states that the algorithm is secure and does not arouse suspicions that secret data is concealed.