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Latin square-based chaotic image encryption method

An encryption method and Latin square technology, applied in the direction of secure communication through chaotic signals, image communication, digital transmission system, etc., can solve problems such as complex calculations, achieve the effects of increasing complexity, improving sensitivity, and improving security

Active Publication Date: 2021-08-24
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0005] Aiming at the technical problem that the security of the existing image encryption method is low and the calculation is complex, the present invention proposes a chaotic image encryption method (LSRD) based on Latin squares, which has good security performance, is suitable for practical applications, and facilitates the safe transmission of digital images

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  • Latin square-based chaotic image encryption method
  • Latin square-based chaotic image encryption method
  • Latin square-based chaotic image encryption method

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Embodiment Construction

[0072] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0073] Such as figure 1 As shown, a chaotic image encryption method based on Latin squares consists of four parts: key generation, pixel scrambling, pixel replacement and bit scrambling. The steps are described as follows:

[0074] Step 1: Use the image matrix P of size N×N to generate the initial key, and input the key into the hyperchaotic Lorenz system to obtain the chaotic sequence X, Y, Z, W.

[0075] The hyperchaotic Lorenz system has multip...

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Abstract

The invention provides a Latin square-based chaotic image encryption method, which comprises the following steps of: generating a key by using an original image matrix, and inputting the key into a hyperchaotic Lorenz system to obtain a chaotic sequence; intercepting the chaotic sequence, converting the chaotic sequence into a matrix, and scrambling an original image matrix; intercepting the chaotic sequence to generate a Latin square matrix as a lookup table; intercepting the chaotic sequence and forming an index matrix, and selecting elements from corresponding coordinates in the lookup table by using the index matrix for replacement to obtain a pixel replacement matrix; and intercepting the chaotic sequence and generating a Latin square matrix, forming a bit matrix by using bit planes of the pixel replacement matrix, performing bit scrambling on the bit matrix by using the Latin square matrix, combining the bit matrix and the Latin square matrix into a bit plane matrix, and converting the bit plane matrix into a decimal system to obtain a ciphertext image. Latin square matrices used in the method are all generated by chaotic sequences, so that the complexity is enhanced, and the safety is improved; the randomness and the sensitivity are effectively improved, differential attacks can be effectively resisted, the decoding difficulty is increased, and the method is suitable for practical application.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to a chaotic image encryption method based on Latin squares. Background technique [0002] With the rapid development of modern communication technology, more and more digital images are transmitted on social networks, and these images carry personal information, so how to protect these private information has become a research hotspot. Due to some inherent characteristics such as strong correlation and high redundancy between adjacent pixels of the image, some traditional encryption methods such as Data Encryption Standard (DES) or Advanced Encryption Standard (AES) are not suitable for digital image processing. Encryption, because the traditional encryption algorithm has the disadvantage of low efficiency when encrypting digital images. [0003] Among the currently proposed image encryption methods, algorithms based on chaos have been widely used. Some properties of cha...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04N1/44
CPCH04L9/001H04N1/44
Inventor 张勋才牛莹李辉陈志武马江涛吴涛王延峰李林伟张焕龙张建伟任航丽栗三一杨飞飞
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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