A Novel Technique of Image Steganography

Steganography is the technique of hiding secret information within any media like text, images, audio/video and protocol based network. Steganography is an important area of research in recent years involving a number of applications. The modern secure image steganography presents a challenging task of transferring the embedded information to the destination without being detected. Transform domain methods hide messages in insensitive areas of the cover image which makes them more robust to attacks. DCT/DWT is used to transform cover image from spatial domain to frequency domain. The secret image or information is then embedded into the frequency domain coefficients. This paper proposed a novel technique for data hiding and compares it with DCT, DWT and hybrid transform domain technique for embedding secret image into cover image. The algorithms are compared for Signal to Noise Ratio (SNR) which is a measure of the difference between the cover image and the stego image.