Hardware Architecture for a Message Hiding Algorithm with Novel Randomizers
Saeed Mahmoudpour, Sattar Mirzakuchaki · International Journal of Computer Applications · 2012
Steganography is the art of hiding information in a cover medium such that the existence of information is concealed.An image is a suitable cover medium for steganography because of its great amount of redundant spaces.One simple method of image steganography is the replacement of the least significant bit (LSB) of a cover image with a message bit.This represents a high embedding capacity but it is detectable by statistical analysis methods such as Regular-Singular (RS) and Chi-square analyses.Therefore, a new LSB algorithm is proposed here which can effectively resist statistical analysis.In this novel algorithm, every two sample's LSB bits are combined using addition modulo 2 which is compared to the secret message.If these two values are not equal, their difference is added to the second sample.Otherwise, no change is made.This paper proposes a hardware realization of this new algorithm.Furthermore, two scalable pixel interleaver and novel message bit randomizer with two different stego-keys are designed.Pixel interleaver can improve resistance against visual analysis by random selection of pixels.