185 / 2015-12-03 14:44:48

Enhanced the Security and Quality of Image Steganography Through Pseudo Random Number Generator

Steganography is the art of hidden communications, encoding/embedding hidden information in cover media in a manner not to provoke an eavesdropper’s suspicion. If a message is hidden with a steganographic method in a randomly selected pixel, it provides an additional layer of protection and reduces the chance of the hidden message being detected. The primary purpose of this paper is to provide two levels of security through a two step process, rather than hidden the message bits directly in cover image, pixels are generated randomly through pseudo random number generator after that secret data is hidden behind a cover image using basic LSB method. MSE (Mean Square Error) and PSNR (Peak Signal to Noise Ratio) are two common quality measurements to measure the difference between the cover-image and the stego-image. Results showed that the proposed method gives better results than simple LSB with higher PSNR and lower MSE.