Data hiding with dual based reversible image using sudoku technique

Steganography is the technique of hiding confidential information within a cover media in such a way that a third party cannot discern the presence of the hidden message. In the existing system, a single scrambled image is used as a cover media. It is partitioned into two areas-the embedding area in which confidential information is embedded and the non-embedding area, which contains the location map. The problem with this system is; it is vulnerable to attacks by intruders. This is because the location map is available along with the embedding area. If the intruder is able to figure out the location map, he can exploit the confidential information. This obscures security. The main aim of the proposed system is to ensure the security of the confidential information. For this, dual cover images are used in place of a single scrambled image. Here, one of the cover images is used for embedding the confidential information and the other is used as the location map. Each time a value is getting embedded into the first cover image, the location map is updated. This improves security as the location map is not available along with the embedded area. In order to regain the cover images without much distortion, reversible data hiding is used. In this project, Sudoku technique is going to be used to achieve higher embedding capacity and good image quality.