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A Chaotic Image Encryption Method Based on Latin Square

An encryption method, 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 effect of increasing complexity, improving sensitivity, and improving security

Active Publication Date: 2022-05-13
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0005] Aiming at the technical problems of the existing image encryption method with the highest security and complicated calculation, the present invention proposes a chaotic image encryption method (LSRD) based on Latin Square, which has good confidentiality performance, is suitable for practical application, and facilitates the safe transmission of digital images

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  • A Chaotic Image Encryption Method Based on Latin Square
  • A Chaotic Image Encryption Method Based on Latin Square
  • A Chaotic Image Encryption Method Based on Latin Square

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0064] 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:

[0065] 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.

[0066] The hyperchaotic Lorenz system has multiple positive ...

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Abstract

The present invention proposes a chaotic image encryption method based on Latin squares, the steps of which are: using the original image matrix to generate a key, inputting the key into the hyperchaotic Lorenz system to obtain a chaotic sequence; intercepting the chaotic sequence and converting it into a matrix to the original image matrix Perform scrambling; intercept the chaotic sequence to generate a Latin square matrix as a lookup table; intercept the chaotic sequence and form an index matrix, use the index matrix to select elements from the corresponding coordinates in the lookup table to replace to obtain a pixel replacement matrix; intercept the chaotic sequence and generate a Latin square matrix , the bit planes of the pixel replacement matrix are formed into a bit matrix, the bits of the bit matrix are scrambled by using the Latin square matrix and combined into a bit plane matrix, and converted into a decimal system to obtain a ciphertext image. The Latin square matrix used in the present invention is all generated by chaotic sequences, which enhances the complexity and safety; effectively improves randomness and sensitivity, can effectively resist differential attacks, increases the difficulty of deciphering, and is suitable for practical applications.

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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Patent Type & Authority Patents(China)
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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