Research On Image Encryption Algorithm Based On Chaotic System And DNA Coding

With the development of high-tech such as the Internet,5G technology,and cloud storage,digital images have become an indispensable part of various industries.In order to ensure the secure transmission of image information,research on image encryption technology has become an important task in the field of information security.Digital images have the characteristics of strong inter pixel correlation and high redundancy,and traditional image encryption techniques can no longer meet the encryption requirements of digital images.Chaotic systems and DNA encoding,due to their excellent characteristics,can be applied to the field of image encryption and can effectively solve the encryption problem of digital images.Based on this,in response to the current development status of image encryption and the encryption needs of different users,the following three encryption algorithms based on different chaotic systems and DNA encoding are proposed to ensure the security of the image encryption process.The main content is as follows:(1)On the basis of one-dimensional logistic chaotic mapping,an improved image encryption algorithm based on one-dimensional segmented logistic chaotic mapping and DNA encoding is obtained.This algorithm is improved on the basis of one-dimensional Logistic chaotic mapping,dividing the Logistic chaotic mapping into segments,allowing the system to enter a chaotic state faster and improving encryption speed.Through simulation experiments,it has been proven that this algorithm has a large key space,fast encryption speed,and low algorithm complexity,which can meet the basic security needs of users,such as people’s daily communication.(2)Propose an image encryption algorithm based on three-dimensional Lorenz chaotic mapping and dynamic DNA encoding.This algorithm has made two improvements on the basis of Algorithm 1,upgrading the one-dimensional Logistic chaotic system to a three-dimensional Lorenz chaotic system,improving the stability and security of the system;Dynamic DNA encoding further increases the diversity of encoding operations,making the encryption process more secure.Through simulation experiments,it has been proven that this algorithm has a large key space,fast encryption speed,small correlation coefficient,and good noise resistance characteristics,which can meet the high security needs of users,such as some companies and enterprises.(3)Propose a color image encryption algorithm based on Chen hyperchaos system and dynamic DNA encoding.This algorithm has two upgrades and improvements on the basis of Algorithm 2,upgrading the multidimensional Lorenz chaotic system to Chen hyperchaotic system,which makes the system more stable and has better encryption effect;Expanding the encryption algorithm of traditional grayscale digital images to color digital images has a wider range of applications.Through simulation experimental results and comparative analysis with other algorithms,it is found that compared with other algorithms,this algorithm has a larger key space,minimal correlation coefficient,good anti-noise and anti-cropping performance,and can meet high security needs of users,such as some special units.