The Second International Conference on Communications and Information Technology
Hiding confidential data in digital images using the Pixel-Value Differencing (PVD) method provide higher embedding capacity without very noticeable artifacts in the cover image to human eyes. However, the presence of hidden data can be revealed by a number of automatic approaches that can detect variations in statistical properties of the image due to embedding such as histogram analysis, chi-square test and universal detectors. This paper aims at reviewing different steganalytic techniques to attack the pixel-value differencing method. It also surveys several proposed methods in the literature to enhance the security of PVD against commonly known attacks.