Four-dimensional Hopfield neural network image encryption method based on quantum Fourier transformation

A neural network and encryption method technology, applied in the field of four-dimensional Hopfield neural network image encryption, can solve the problems of high pixel correlation coefficient decryption, unfavorable encryption algorithm implementation, transmission and distribution difficulties, etc. The difficulty of cracking, the effect of improving the chaotic characteristics

Inactive Publication Date: 2018-01-16
GUANGDONG UNIV OF TECH
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Problems solved by technology

In recent years, experts have pointed out that chaotic sequences have the characteristics of high sensitivity to initial conditions, positive Lyapunov exponent, fractal and fractal dimensions, etc., and successively proposed a variety of image encryption methods based on chaotic systems, such as one-time encryption, bit encryption, Mathematical model encryption and DNA sequence encryption, but the above methods have certain defects, such as the one-time pad key is very diffi

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  • Four-dimensional Hopfield neural network image encryption method based on quantum Fourier transformation
  • Four-dimensional Hopfield neural network image encryption method based on quantum Fourier transformation
  • Four-dimensional Hopfield neural network image encryption method based on quantum Fourier transformation

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Embodiment Construction

[0033] The specific implementation steps are as figure 1 The encryption flow chart is shown as follows:

[0034] Step 1: First add up all the pixel values ​​of the odd rows to get the average pixel value c 1 , and then calculate the average pixel value c of the even row 2 , similarly the average pixel value c corresponding to the odd and even column 3 、c 4 , and put c 1 ~ c 4 Between [0,1] of the pixel value mapping, the average pixel array C=[c 1 ,c 2 ,c 3 ,c 4 ].

[0035] Step 2: Input the initial key (x 1 , x 2 , x 3 , x 4 ) are respectively multiplied with the corresponding elements in C to obtain a new initial key, the previous 200 results are discarded, and the counting starts from 201 to obtain a super-chaotic key matrix L=(l 1 , l 2 , l 3 , l 4 ) where l 1 =(x 201 ,...,x 201+m ) l 2 =(x 201+m ,...,x 201+2m ), l 3 =(x 201+3m ,...,x 201+4m ), l 4 =(x 201+4m ,...,x 201+5m ), and x 201 ,,...,x 201+5m Values ​​are mapped to [0.255].

[0036]S...

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Abstract

In view of the shortcomings of the traditional three-dimensional Hopfield neural network, the invention presents a four-dimensional Hopfield neural network image encryption method based on quantum Fourier transformation. First, a hyper-chaotic sequence of a four-dimensional Hopfield neural network is generated with the aid of plaintext information and an input key. Then, a quantum chaotic sequenceis generated with the aid of a mapping NCML network through quantum Fourier transformation to carry out secondary encryption in order to improve the shortcoming of the traditional quantum Fourier without chaotic characteristic. Finally, Arnlod scrambling is introduced to get a final ciphertext. The simulation experiment shows that the algorithm not only can effectively resist statistical featureattack and differential attack, but also can greatly improve the shortcomings of the traditional three-dimensional Hopfield neural network such as low dynamic complexity and small Lyapunov index, andachieve a good encryption effect.

Description

technical field [0001] The invention belongs to a grayscale image encryption method, and more specifically relates to a novel quantum Fourier transform four-dimensional Hopfield neural network image encryption method. Background technique [0002] With the rapid development of Internet technology, the transmission of image information has become an indispensable link in people's lives. However, the security risks in the image transmission process using the Internet as a carrier have attracted more and more attention from scholars at home and abroad. Traditional encryption methods, such as Data Encryption Standard (DES), Triple Data Encryption Standard (3-DES), International Data Encryption Algorithm (IDEA), Improved Encryption Standard (AES) and RSA (Rivest-Shamir-Adleman), are Designed for text information encryption, it is not suitable for fast and safe encryption of image information with strong pixel correlation and large redundancy. In recent years, experts have pointe...

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Application Information

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IPC IPC(8): H04L9/08H04L9/00G06N3/04
Inventor 谢国波姜先值
Owner GUANGDONG UNIV OF TECH
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