AN IMPROVED VIDEO STEGANOGRAPHY TECHNIQUE USING PIXEL VALUE DIFFERENCING AND AES CRYPTOGRAPHY

Abstract

In this work propose a new video steganographic method capable of producing a secret-embedded image that is totally indistinguishable from the original image by the human eye. First the text data is encrypted using AES algorithm. Then derive a difference value from two consecutive pixels by utilizing the pixel-value differencing technique (PVD). The hiding capacity is depends on the difference value of adjacent pixels. In other words, the smooth areas less secret data can be hide, on the contrary, more secret data can be embed in edge areas. This way, the stego-image quality degradation is more imperceptible to the human eye. Second, the remainder of the two adjacent pixels can be computed by using the modulus operation, and then secret data can be embedded into the two pixels by changing their remainder. In this work, there is an optimal approach to alter the remainder so as to highly reduce the image distortion caused by the hiding of the secret text. The values of the two consecutive pixels are changed after the embedding of the secret data by the proposed algorithm. This method avoids the falling-offboundary problem by using pixel-value differencing and the modulus function.