A new perfect hashing based approach for secure stegnograph

Image stegnography is an emerging field of research for secure data hiding for data transmission over internet, copyright protection, and ownership identification. A couple of techniques have been proposed for colour image stegnography. However, the colour images are more costly to transmit on internet due to their size. In this paper, we propose a new perfect hashing based approach for stegnography in grey-scale images. The proposed approach is more efficient and effective that provides a more secure way of data transmission at higher speed. The presented approach is implemented into a prototype tool coded in VB.NET. The presented approach is effective in a way that multiple file formats such as bmp, gif, jpeg, and tiff are also supported. A set of sample images were processed with the tool and the results of the initial experiments indicate the potential of the presented approach not only in terms of secure stegnography but also in terms of fast data transmission over internet.