Image Encryption Technology Based On DNA Coding And Chaotic Systems

With the rapid development of science and technology,the Internet era has arrived.More and more information is transmitted through the communication network.Malicious attacks and theft of user privacy data pose a great threat to network security.For example,in the fields of online medical care,e-commerce transactions,and finance,a large amount of user data needs to be transmitted every day,and these data are often transmitted in the form of digital images.The use of image encryption technology to improve the security of network picture transmission is imminent.The research on image encryption system has practical value and practical significance.Research shows that image encryption technology can effectively prevent data leakage.During the development of image encryption,the chaotic system played an important role in the application of image encryption technology due to its pseudorandomness and good initial value sensitivity.Compared with the traditional image encryption technology,the security performance of image encryption technology based on chaotic system is more significant.After discussing the characteristics and development status of chaotic systems in detail,a new type of image encryption system is researched with the latest DNA technology.The main research contents are as follows:First,the traditional image cipher system based on the scrambling-diffusion architecture in the sense of Shannon has been researched on algorithm simulation.The security problems of the existing scrambling and diffusion algorithms are pointed out,and the technical approaches to improve security are analyzed.Provide theoretical support for designing secure image cryptographic algorithms.Then,an image encryption algorithm based on dynamic DNA coding operation is proposed,which makes full use of the high capacity of DNA technology and the diversity of DNA coding,dynamically performs DNA coding,and performs plaintext association processing in the process of DNA computing.Simulation analysis shows that the fusion DNA coding dynamic encryption scheme can not only improve the security of cryptographic algorithms,but also resist passive attacks such as selection / known plaintext attacks.Finally,an image encryption scheme based on chaotic systems and novel DNA computing is proposed.This solution abandons the shortcomings of single DNA encoding method and DNA addition,subtraction and XOR operation are essentially binary operations.A new DNA linking operation is proposed.The complementary operation of DNA encoding is used instead of the complementary operation of binary numbers.Utilizing the diversity and efficiency of DNA coding.The number of encoding methods has been increased from eight to 24,and the number of DNA algorithms has also been increased to 16.This solution is based on the "disorderproliferation" architecture and can be quickly implemented on a DNA computer.Simulation analysis shows that the studied DNA image cryptosystem has the advantages of large key space,good ciphertext statistical characteristics,and high system sensitivity.