DNA image encryption algorithm based on serrated spiral scrambling and cross bit plane

Abstract

In response to the problem of uneven information distribution in DNA encoding, in this article, a new DNA chaotic image encryption algorithm combining serrated spiral scrambling and cross bit plane using lookup table diffusion is proposed. First of all, a four-dimensional hyperchaotic system is proposed, which can produce four interrelated sequences. Next, perform serrated spiral scrambling and index scrambling on the plain image to change the position of pixels. Then DNA is encoded in combination with the crossed bit plane, and then the pixel size is changed by using the new look-up table diffusion. Lastly, DNA decoding is performed to obtain the encrypted image. The test of whether the feasibility and security of the algorithm have been improved can be obtained by analyzing the size of the experimental data and the degree of deviation from the ideal value. After comprehensive analysis, it is concluded that this paper has good encryption effect on the basis of encryption security has also been improved.