Research on an Image High Intensive Encryption Way Based on the Chaos Theory and DNA Coding

Abstract

With the development of Internet information technology, reliable transmission of multimedia data such as images and videos is becoming more and more important. For the traditional data encryption technology can not be effectively used in the current image encryption, this paper proposes a color image encryption algorithm based on two hyperchaotic systems and DNA coding and studies its performance. Firstly, a color image is divided into three channels: R, G, and B. Then, the random matrix generated by Logistic mapping and the three-channel matrix of plaintext image are partitioned into blocks. The random sequence generated by Chen hyperchaotic system is used to determine the DNA encoding and decoding mode and DNA operation mode of each channel of plaintext image RGB and each sub-block of random matrix. The DNA encoding and decoding mode and the DNA operation mode of each sub-block are performed in parallel and the Logistic chaotic system is used to map out the sequence to perform row and column replacement on the ciphertext image. Finally merge the encrypted sub-blocks to get the encrypted image. At the same time, the paper analyzes the encryption effect by histograms of R, G and B channels, information entropy, adjacent pixel correlation and key sensitivity simulation. By comparing the simulation results with other algorithms, it can be concluded that the image encryption effect is objective and has the characteristics of high security, large key space and strong anti-attack performance.