Dynamic Compensation LSB Hiding Algorithm Based On Chaotic Sequences

In recent years,more and more people are concerned about the security of image information in communication and pay more attention to the protection of information such as personal privacy and trade secrets,not only the high-level information security protection in national security.Image hiding is a commonly used method,which is a way of hiding secret information into the image of the carrier and avoiding the detection of the third party.The most mature method is the Least Significant Bits(LSB)cache algorithm.To begin with the actual needs,this paper thoroughly studies development situation at home and abroad,algorithm principle and the analysis of the advantages and disadvantages of the Least Significant Bits(LSB)algorithm,and then come to a conclusion that the simple LSB algorithm has poor security performance and poor robustness.In order to solve the above problems,this paper proposes an improved dynamic compensation LSB algorithm based on chaotic sequences.Firstly,one dimension chaotic map is used to generate chaotic sequence.Secondly,the chaotic sequence is used to generate the random embedded row and column coordinates,instead of the method of embedding the pseudo-random number columns.In this paper,the random location method of LSB algorithm is improved.Thanks to the randomness and ergodicity of the chaos,the secret information embedded in the carrier image is more uniform and more random.Thirdly,the gray value of some hidden image pixels are reduced by one.This will make up for the carrier image adjacent pixels statistical properties change,and maintain the consistency of the image statistical properties before and after embedding the information,which can avoid some statistical characteristic analysis of the detection algorithm.The improved algorithm,thanks to the randomness of chaotic sequence,not only has all the advantages of random LSB embedding method,but also has better robustness and anti-card analysis capability.A large number of experimental simulations show that the integration of dynamic compensation is effective against RS and SPA analysis.The various kinds of attacks in the transmission process are simulated by the shear of different areas and the noise of different densities.The results show that the attack against shear and salt and pepper noise is better.Because chaos is extremely sensitive to the initial value,even that using the stating value which is extremely similar from the initial value to generate chaotic sequence in the same number of iteration times,as the key to extract the secret image,it will fail.This shows that the anti-violent extraction ability is strong.On the whole,robustness,concealment and security of the improved algorithm are greatly improved.However,the algorithm has the disadvantages of complex algorithm and low implementation efficiency.This will be the direction of the next optimization algorithm.