Bit-4 of frequency domain-DCT steganography technique

Steganography is the art and science of concealing secret information in such a way that no one apart from the sender and intended recipient even realize that there is hidden information. In this paper, we describe a new method of steganography based on embedding message bits in the 4^th bit of the coefficients of a transform domain, such as the DCT and Wavelet, of an image. The proposed technique utilizes the idea of SSB-4 technique in modifying the other bits (i.e, 1^st, 2^nd, 3^rd and/or 5^th), to obtain the minimum variation between the original and the modified coefficient. Since this approach uses significant bit, the hidden message resides in more robust areas, spread across the entire stego image, and provides better resistance against steganalysis processes. The obtained experimental results also indicate that; the proposed method will be a good and acceptable steganogaphy scheme.