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New intersected composite chaotic color image encryption algorithm

A color image, encryption method technology, applied in the field of image data transmission security research, can solve the problem of low image encryption efficiency

Inactive Publication Date: 2017-04-05
GUANGDONG UNIV OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of the security of image encryption, it is also worthy of attention that the efficiency of image encryption is getting lower and lower. The complexity of the encryption system and the trade-off of encryption performance, how to propose an efficient and safe chaotic encryption algorithm is the current field of image encryption. research focus

Method used

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  • New intersected composite chaotic color image encryption algorithm
  • New intersected composite chaotic color image encryption algorithm
  • New intersected composite chaotic color image encryption algorithm

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0045] refer to figure 1 , the encryption steps of the present invention are as follows

[0046] Step 1, input an MxN color image A as the image to be encrypted;

[0047] Call the imread function to read in an MxNx3 color image as the image to be encrypted;

[0048] Step 2, separate the three-dimensional image A to be encrypted into two-dimensional grayscale matrix a on three levels of R, G, and B 1 - i(s, t), i=1, 2, 3;

[0049] Step 3, select the transformation matrix parameters α, β and the number of iterations m (any value greater than 1000) of the generalized Arnold transformation, for the image matrix a 1 _i(s, t) for m 1 Subgeneralized Arnold transform to get the scrambled image matrix a 2 _i(s, t), i=1, 2, 3;

[0050] For a pixel matrix with unequal rows and columns, the Arnold transformation steps are as follows:

[0051]

[0052] First, get the image matrix a 1 _i(s, t), the coordinates of each pixel in i=1, 2, 3 (a n , b n ) at the pixel value;

[0053...

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Abstract

The invention relates to a new intersected composite chaotic color image encryption algorithm which can rapidly encrypt an original image. The algorithm mainly relates to two kinds of chaotic encryption ideas, namely, spatial domain scrambling and pixel value diffusion. The algorithm carries out pixel scrambling and diffusion after a to-be-encrypted color image is subjected to pretreatment. The algorithm applies a composite new chaotic encryption sequence to an image encryption method which carries out scrambling, diffusion and re-scrambling. The experiment shows that the algorithm has high safety than other algorithms in color image encryption.

Description

technical field [0001] The invention relates to the field of image data transmission security research, in particular to an RGB image encryption method that performs pixel scrambling and transformation on plaintext images through a new RGB image encryption method to protect plaintext image information. Background technique [0002] With the maturity of Internet and multimedia communication technology, people are more and more interested in the image information transmission method that can be expressed intuitively. The confidentiality of image information in the transmission process is the focus of people's attention, and it is also a research focus in the field of information security. Chaos is a non-deterministic random behavior generated by deterministic systems. The nonlinear dynamics of chaotic signals are difficult to predict and sensitive to initial values ​​and control parameters. As early as 1989, the British chaotic signal used in the security field of encryption ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 谢国波朱润盈
Owner GUANGDONG UNIV OF TECH
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