Study Of The Chaotic Network Of Secure Communication Of Digital Image Signals

It is an urgent need for network secure communication to apply Chaos theory to the multimedia signals transmission, and it is one of most advanced and hot research topics internationally. It proposes some new methods to the application in net secure communication, and breaks a new path. This paper studies the theory of digital image chaotic secure communication, and form a digital image chaotic encryption net transmission system, consisting of image low-dimensional chaotic encryption subsystem, image hyperchaotic encryption subsystem, P2P transmission subsystem of digital image, and P2P transmission subsystem of key texts. In this system encryption algorithms have higher speed and well security.This paper presents the primary researches that include the followings:Putting forward a symmetric block product encryption method based algorithm that employs four one-dimensional chaotic mappings and the techniques including digital image permutation, chaos shift keying, chaos masking, and multilevel diffusion mechanism; the detailed analyzing results indicating that this encryption is simple to implement, and superior in encryption security;Studying the generalized Henon map, a hyperchaotic discrete map, which lays a foundation for applying it to secure communication;Designing a digital image hyperchaotic encryption method which innovations lie in applying hyperchaos to secure communication and permutation rule is not specified instead of related to the position in the whole queue; the simulation results of this new algorithm show that it has a better performance;Developing a digital image P2P transmission system, and the test results prove that this system is adaptive to the encrypted digital image transmission since it provides higher transmission speed and less error;Carrying out a new channel encryption method based on chaotic encryption, and employing this method to develop a key text P2P transmission system.