High Quality High Capacity Robust DWT Based Steganography

Steganography is the art of hiding the existence of data in another transmission medium to achieve secret communication. It does not replace cryptography but rather boosts the security using its obscurity features. In this paper we propose a new steganography technique which embeds the secret images in frequency domain.  In this we have used 3-level DWT as well as 1-level DWT for hiding and extracting the secret images. For 3 levels DWT the secret image is going to hide in one plane and the corresponding PSNR and MSE values are to be calculated. Similarly for 1-level DWT the secret image is hidden into all the 3 planes of the cover image. And additionally for ensuring the more secrecy this paper includes a 4-bit key so that the secrecy of the whole transmission system is increased efficiently. The experimental results shown that this method is efficient than those generated by the existing methods.