DNA image encryption method based on cloud model and hyperchaotic system and system based on cloud model and hyperchaotic system

Abstract

The invention provides a DNA image encryption method based on a cloud model and a hyperchaotic system and a system based on the cloud model and the hyperchaotic system. The method comprises the steps that a color image is decomposed into an image with three color channels; the decomposed image is transformed into a binary matrix, and the binary matrix is encoded according to the coding criterion of a DNA sequence; a chaotic sequence is generated, and the chaotic sequence is sorted by a sort number; the index value combination of the sequence is selected to scramble the matrix; the scrambled matrix is divided into small blocks; according to the addition rule of the DNA sequence, the small blocks are added; the small blocks are recombined to acquire a new DNA sequence matrix, and the matrix is decoded; the cloud model is called to generate a function to acquire new three-dimensional sequence values; sequence values X and Y are used as row and column numbers to adjust pixel positions to acquire a processed image; XOR operation is carried out on a sequence value Z and the processed image to acquire an image out; and out is assigned to the original image.

Description

technical field [0001] The invention relates to the field of image encryption, in particular to a DNA image encryption method based on a cloud model and a hyperchaotic system. Background technique [0002] Digital image is one of the most popular forms of multimedia at present, and it is widely used in politics, economy, national defense, education and so on. For some special fields, such as military affairs, commerce and medical treatment, digital images also have higher confidentiality requirements. [0003] In order to realize the security of digital images, in practice, the two-dimensional images are generally converted into one-dimensional data first, and then encrypted using traditional encryption algorithms. Different from ordinary text information, images and videos have temporality, spatiality, visual perceptibility, and lossy compression. These characteristics make it possible to design more efficient and secure encryption algorithms for images. Since the 1990s, ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an efficient and highly secure DNA image based on cloud model and hyper-chaotic system in view of the defects of low efficiency and poor security in the prior art for encrypting and decrypting image files Encryption method and system

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