Image encryption method based on fractal and DNA sequence operation

Abstract

The invention discloses an image encryption method based on fractal and DNA sequence operation, which mainly comprises the steps of: scrambling an original image by utilizing a scrambling sequence generated by adopting a fractal method; then acquiring a DNA template matrix by utilizing a corrected natural DNA sequence; then encoding the scrambled image, and carrying out DNA sequence add operation on a result and the DNA template matrix; and finally utilizing a chaos template matrix generated by Logistic mapping and a matrix obtained after DNA decoding to interact to obtain an encrypted image. The image encryption method has the advantages of high security, good encryption effect and large secret key space, and can effectively resist exhaustive attacks, statistical attacks and differential attacks. And the algorithm is easy to implement, the cost is low, and the encryption results can be transmitted through the Internet.

Description

technical field [0001] The invention belongs to the fields of bioinformatics and image encryption, in particular to an image encryption method based on fractal and DNA sequence operations. Background technique [0002] With the rapid development of digital technology and computer networks, digital images have become one of the main ways of information expression and transmission, and are widely used in various fields such as politics, economy, military affairs, and education. People can easily transmit various images through the network. image information. However, since digital information is extremely easy to be copied, tampered, illegally disseminated, and intentionally attacked, people have higher requirements for the security and confidentiality of information transmission while enjoying the speed and convenience of information transmission. [0003] Image encryption technology based on chaos theory is the most widely used method in the field of image encryption. It r...

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Problems solved by technology

[0006] In view of the defects in the prior art methods, the present invention provides an image encryption method based on fractal and DNA sequence operations. First, the scrambling sequence generated by the fractal method is used to scramble the original image; then the corrected natural DNA sequence is used to obtain DNA template matrix; then encode the scrambled image, and add the result to the DNA template matrix for DNA sequence operation; finally, use the chaotic template matrix generated by Logistic mapping to interact with the matrix obtained after DNA decoding to obtain an encrypted image, which solves the problem of existing Image encryption technology has poor security and high cost

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