4-neighborhood exclusive or image encryption method based on hyper-chaos lorenz system

An encryption method and ultra-chaotic technology, which is applied in the field of image encryption and information security, and can solve problems such as chosen plaintext attacks

Inactive Publication Date: 2014-01-01
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can well overcome the shortcomings of simple XOR encryption that is vulnerable to chosen plaintext attacks, and improves the security performance of image encryption

Method used

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  • 4-neighborhood exclusive or image encryption method based on hyper-chaos lorenz system
  • 4-neighborhood exclusive or image encryption method based on hyper-chaos lorenz system
  • 4-neighborhood exclusive or image encryption method based on hyper-chaos lorenz system

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Embodiment Construction

[0036] The implementation process of the present invention will now be described in detail in conjunction with the accompanying drawings.

[0037] figure 1 Process flow chart of 4‐neighborhood XOR image encryption based on hyperchaotic Lorenz system.

[0038] Such as figure 1 As shown, the present invention provides a 4-neighborhood XOR image encryption method based on a hyperchaotic Lorenz system, including the following steps to scramble and 4-domain XOR encryption to a color image.

[0039] Step S1‐101:

[0040] In the Matlab7.1 environment, a 315×420×3 elephant color image is selected as the image to be encrypted, and its RGB three-component grayscale image is extracted respectively, and the elements of each position of each component are sequentially read, and the composition Three sets of 315×420 plaintext matrices {P R}, {P G}, {P B}.

[0041] Step S1‐102:

[0042] Select the initial value of hyperchaotic Lorenz (0.87391, 1.53748, 0.29074, 0.38923) and the step ...

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Abstract

The invention relates to a 4-neighborhood exclusive or image encryption method based on a hyper-chaos Lorenz system. The method is characterized in that RGE three components of an original color image are extracted, the grey levels of all pixel points in the RGE three components are recorded as a two-dimensional matrix PR, a two-dimensional matrix PG and a two-dimensional matrix PB, scrambling is carried out on the matrix PR, the matrix PG and the matrix PB respectively by means of chaos sequences generated by the hyper-chaos Lorenz to obtain an image pixel matrix PR1, an image pixel matrix PG1 and an image pixel matrix PB1 after scrambling, and 4-neighborhood exclusive or encryption is carried out on the matrix PR1 through reusing of the processed chaos sequences of the Lorenz, the matrix PG1 and the matrix PB1 respectively, so the encryption process is completed. The scrambling and 4-neighborhood exclusive or encryption are carried out on the color image through the hyper-chaos Lorenz system, so the method has the advantages of being large in secret key space, good in safety and strong in plaintext attack resistance and is suitable for image secret communication.

Description

technical field [0001] The invention relates to a 4-neighborhood XOR image encryption method of a hyperchaotic Lorenz system, which belongs to the field of information security, in particular to the field of image encryption, and mainly uses the hyperchaotic Lorenz system to realize the encryption of digital color images. Background technique [0002] In recent years, with the rapid development of the Internet of computer technology and the increasing capacity of storage devices, the analysis and research of digital images with huge storage capacity has become one of the important means for people to obtain information. However, due to the openness of the network, they may be easily obtained or intercepted, and the illegal copying and tampering of the original information may cause serious consequences. Therefore, how to effectively protect the security of image information has become an urgent and important issue. It has received wide attention from all walks of life. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32H04L9/00
Inventor 杜翠霞张定会张宗楠张云从媛
Owner UNIV OF SHANGHAI FOR SCI & TECH
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