Abstract
With the development of national information processes, specific image information from secret departments or individuals is often required to be confidentially transmitted. Numerous image encryption methods exist, especially since the initial value sensitivity and other characteristics of chaos theory and chaos theory-based encryption have become increasingly important in recent years. At present, DNA coding constitutes a new research direction of image encryption that uses the four base pairs of DNA code and image pixel values to establish a special correspondence, in order to achieve pixel diffusion. There are eight DNA encoding rules, and current methods of selecting the DNA encoding rules are largely fixed. Thus, the security of encoded data is not high. In this paper, we use the Lorenz chaotic system, Chen’s hyperchaotic system, and the DNA encoding combination and present a new image encryption algorithm that can dynamically select eight types of DNA encoding rules and eight types of DNA addition and subtraction rules, with significant improvements in security. Through simulation experiments and histograms, correlations, and NPCR analyses, we have determined that the algorithm possesses numerous desirable features, including good encryption effects and antishear and antinoise performances.
Highlights
With the development of national information processes, people have paid increasing attention to secure transmission of image information
DNA coding and chaotic encryption technology are combined, and a dynamic DNA coding image encryption algorithm is proposed that can improve the security of the encryption process
According to the requirement of high efficiency, safety, and reliability of the encrypted image, this paper proposes an image encryption technology based on the combination of chaotic map and DNA coding technology
Summary
With the development of national information processes, people have paid increasing attention to secure transmission of image information. While some image encryption techniques have emerged, based on mathematical transformations, their security is inadequate. Chaotic encryption technology has been used as the mainstream of encryption technology in recent years [4], but the use of chaotic technology only is not safe enough [5,6,7]. Image encryption technology based on DNA computing has been extensively used by scholars, but work is still at the initial stages of research. Most of the image encryption algorithms that are based on DNA coding adopt relatively fixed coding methods, and security is not high. DNA coding and chaotic encryption technology are combined, and a dynamic DNA coding image encryption algorithm is proposed that can improve the security of the encryption process. The algorithm has been shown to exhibit good encryption effects and can effectively resist statistical, shear, and other attacks
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