LSB Layer Independent Robust Steganography using Binary Addition

In the field of security different steganography techniques hides data within the cover media in such a way so that human perception cannot follow it. All of these also try to follow three challenges of steganography i.e. robustness, imperceptibility and capacity. This proposed technique meets these three challenges very efficiently. Here the secret data are not directly embedded within the cover file but the intensity of cover pixel are adjusted in such a way so that at the receiver side the actual target bits are extracted from stego image by performing binary addition. The embedding also performs binary addition among desired number of bits selected from LSB and the two LSBs of the result of binary addition are considered as the interpretation of two target data bits. The maximum change in the intensity value is nominal and is not depends on the number of LSB layer chosen for binary addition. Since the actual data are not hidden thus intruders cannot get it by just using the concept of standard LSB extraction technique. Even though they are able to know the binary addition technique used here then also don’t get the actual target bits without knowing the number of LSB layers involved for binary addition. Two data bits are embedded in each pixel so from capacity point of view this technique is two times better than standard LSB technique for steganography.