Research On Image Steganography Against RQP Steganalysis

With the development of the network technology, people have entered a more efficient digital age. Network information has promoted the human world change, while its security is also facing a huge challenge. To protect the security of secret information, the steganography technology hides the secret information in another public stored and transmitted message. By hiding the existence of information, steganography technology has stronger safety performance as not to arouse the third party suspicion. As the opposite of steganography, steganalysis technology has also been rapid development. As a typical steganalysis technology which is aimed at detecting the existence of secret information in color images, RQP algorithm has higher detection rate and better analytical performance. This paper mainly studies the steganography based on digital images that can resist the RQP algorithm.This paper first reviews the development history of the steganography technology, introduces the branch of the steganography and the principle of traditional LSB algorithm. Then it expounds the RQP steganalysis techniques and analyzes the principle of typical ARQP algorithm against RQP steganalysis. To embed messages in color images and resist the quite powerful RQP analysis method, a novel LSB(Least Significant Bit) steganography is put forward. All the pixels of the carrier image are divided into a plurality of sets that will be treated as a whole according to its color value during the embedding processes of the proposed method. By reducing the impact of carrier image color change on the unique color and close color pairs, this new algorithm reduce the relative changes of the above two indicators. The images after information hiding are still sensitive to the embedding of the test information. The secret information is preprocessed using DSE encryption mechanism before embedding to further improve the security of secret messages. Experimental results show that the presented improved LSB algorithm had realized the resistance against RQP steganalysis while achieving adequate embedding capacity without raising any suspicion about the existence of the secret information.