An image encryption method based on Duffing mapping and genetic operation

Abstract

The invention provides an image encryption method based on Duffing mapping and genetic operation. The hash value of a plaintext image is calculated by using a Keccak algorithm as an initial value input key of a chaotic system; the sensitivity and pseudo-randomness of the chaotic map to the initial conditions are used, the pseudo-random sequence is obtained by iterating the Logistic map and the Hill encryption matrix is generated to scramble and replace the image matrix. Combined with Duffing map and DNA coding technology, pixel selection, crossover and mutation are realized by genetic operation to achieve pixel diffusion and scrambling, and bidirectional exclusive OR operation with chaotic sequence to enhance its confusion and diffusion characteristics. The invention utilizes the pseudo-randomness of Duffing mapping and Logistic mapping, ergodicity and the crossover mutation operation of genetic algorithm, has strong sensitivity to key, can effectively resist statistical attack and differential attack, etc., has good security and application potential, and the image encryption effect and performance are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method based on Duffing mapping and genetic operations. Background technique [0002] With the rapid development of the Internet and the further improvement of people's production and living needs, the era dominated by text is gradually becoming graphic. As a practical information carrier, images have rich and efficient perception capabilities for image information. At the same time, images further present the characteristics of large data volume and high redundancy, which also pushes up some special needs, such as some related to security and privacy. Fields: military, government, commercial secrets, and personal security and privacy all require secure image storage or transmission. The vast openness of the Internet makes transmitted data easily intercepted and captured. Therefore, image encryption has gradually become a research hotspot in academi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the security threats and low-efficiency technical problems encountered in image encryption, the present invention proposes an image encryption method based on Duffing mapping and genetic operations, using the pseudo-randomness, ergodicity of Duffing mapping and Logistic mapping and the intersection of genetic algorithms Mutation operation, strong sensitivity to key, can effectively resist statistical attack and differential attack

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