Color Image DNA Encryption Algorithm Based On Improved CML Chaos

With the development of computer technology,the information carried by the network is increasing day by day,and the security of all kinds of information on the network is getting more and more attention.Digital image is the most important part of multimedia information.Therefore,it is of great significance to design a more effective digital image encryption algorithm.The application of chaos theory makes the digital image encryption develop rapidly.Although the digital image encryption method based on chaos has made some progress,there are still the following problems:(1)traditional encryption algorithms cannot solve the problems of high redundancy and large amount of data in digital images(2)weak security of low-dimensional chaotic encryption(3)High-dimensional chaotic encryption has low efficiency.Firstly this article introduces the related methods of digital image encryption briefly,and introduces the evaluation methods of digital encryption algorithms.Then,according to the defects of the existing chaos-based digital encryption algorithm,the in-depth research is carried out from the direction of improved spatiotemporal chaos and DNA encryption and the direction of improved chaos and ELLA.The main work is as follows:(1)A color image DNA encryption algorithm based on improved chaos-CML is proposed.In order to solve the problems of high-dimensional chaotic complexity and low-dimensional chaotic encryption in traditional chaotic encryption,improved chaos-CML is used for encryption,RGB pixel-level obfuscation is carried out at the same time.Then DNA coding and operation are used to the image encryption,so as to solve the problem of high digital image redundancy and large amount of data,as well as the problem of low-dimensional chaos security.Security analysis and simulation experiments show that this method improves the attack resistance compared with existing methods,and can achieve an average encryption speed of 1.25 s per sheet.(2)A color image DNA encryption algorithm based on improved chaos-ELLA is proposed.For high-dimensional chaotic encryption,the problems of low encryption efficiency and slow operation speed are generally unable to achieve real-time encryption,combining improved chaos with life-long learning ELLA;then using RGB pixel-level obfuscation,DNA encoding and operations to segment the image Encryption to solve the problems of high redundancy of digital images and large amount of data,as well as poor security of low-dimensional chaos and low efficiency of high-dimensional chaotic encryption.Security analysis and simulation experiments show that this method improves the attack resistance compared with existing methods,and can achieve an average encryption speed of 0.99 s per sheet,which can meet real-time encryption.