Image encryption method based on random number embedding and DNA dynamic coding

Abstract

The invention provides an image encryption method based on random number embedding and DNA dynamic coding, and the method comprises the steps: firstly embedding a random number into a plaintext image,and carrying out the preprocessing operation; then, performing DNA dynamic coding on the preprocessed image, then, generating a scrambled position sequence by utilizing a chaotic sequence to completescrambling operation on a sequence after plaintext image DNA coding, and introducing plaintext-related DNA fixed feature information in a scrambling process to disturb generation of a scrambling sequence; and then performing exclusive OR operation on the scrambled DNA sequence of the plaintext image and the mask sequence generated by the chaotic system to complete diffusion; finally, carrying outDNA dynamic decoding on the diffusion DNA sequence to obtain a ciphertext image. According to the method, the problem that some image encryption algorithms are invalid for scrambling of special images (all-black and all-white images) is solved, meanwhile, the design of DNA coding rules is related to the pixel sum of plaintext images, and the sensitivity of the encryption algorithms to plaintext information is improved.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method based on random number embedding and DNA dynamic encoding. Background technique [0002] With the continuous development and maturity of Internet of Things technology and intelligent information processing technology, the image information of all walks of life is growing explosively. For example, in the traffic field, vehicle image information taken by electronic police; in the medical field, medical images taken by image inspection equipment such as CT, X-ray, and B-ultrasound; In terms of entertainment, personal privacy image information captured by cameras, mobile phones and other equipment. A large amount of image information is generated every day, and the number is still increasing rapidly. New technology not only brings convenience to people, but also brings a series of new problems to people. For example, people start to worry about t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that some existing image encryption algorithms are invalid for scrambling special images (such as all-black and all-white images), there are problems of low security and low encryption efficiency, and the adopted static-based DNA coding method is resistant to The plaintext has poor offensiveness and is easily cracked by hackers. The present invention provides an image encryption method based on random number embedding and DNA dynamic encoding

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