Research On Image Encryption Based On Multiple Chaotic Sequences

With the rapid development of computer science and information technology, information security and privacy issues become more important and significant,research on information security has become increasingly important.In today’s research in the field of encryption systems, chaotic systems, due to the good pseudo-randomness, unpredictability of long-term, complex dynamical behavior and good randomness and other related properties, so that the image encryption algorithm based on chaotic system has good prospects for development.It can be well applied to the encryption algorithm, the paper will research and analysis on the cryptographic algorithms and image information security. The paper offers a simple summary to the status of image encryption and a briefly discussion about its development. In this thesis, the application of chaos theory in the field of image encryption is focused compared and studied. First, the characteristics of complex double chaotic systems are introduced and characterization, but also the safety testing analysis and design of the encryption algorithm.Secondly, the multi-dimensional chaotic system and hyper chaotic systems will be researched and its encryption performance will be analyzed. On the safety analysis, it will be studied in terms of their key space, histogram and the correlation of adjacent pixel. In the theoretical simulation, these chaotic image encryption algorithms can effectively resist the attack, to ensure the security of the encryption system to a certain extent. When getting better encryption effect, it can be studied and used in digital communications technologies.Finally, it achieves a secure transmission of digital image signals through the application of chaotic digital communication systems and new chaotic secure communication, designs a program based on digital image encryption algorithm, builds a digital model and gets a digital chaotic sequence of 0/1 and achieves the desired goals.Further compares the safety of these types of digital image signal transmission solutions through simulation and analysis’s experiment, the results show that the new chaotic communication scheme proposed in this paper is suitable for the transmission of multimedia digital information.