A Report on Genetic Algorithm based Steganography for Image Authentication

Image authentication is done by embedding image/ message in spatial domain or frequency domain. A mask is chosen from the source image in row major order. Bits of the authenticating image are embedded in each byte of the source image block where the position is chosen using hash function. A hash function is a function that takes variable size inputs and return fixed size output. The position will vary from 0 to 4. The hash function is used to find out the position of embedding that vary for every byte of image and is gives more security of the hidden information. The embedding process is repeated throughout the image. The dimension of the authenticating image along with the content are embedded. Genetic Algorithm is used to minimize the difference between the source & embedded image.