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Chaos theory-based digital image parallel encryption method

A technology of digital image and encryption method, which is applied in the field of information security, can solve problems such as inability to effectively resist differential attacks, and achieve the effects of improving computing speed and encryption performance, good encryption effect, and large key space

Inactive Publication Date: 2017-05-10
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some current image encryption methods mainly have problems such as being unable to effectively resist differential attacks

Method used

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  • Chaos theory-based digital image parallel encryption method
  • Chaos theory-based digital image parallel encryption method
  • Chaos theory-based digital image parallel encryption method

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Embodiment Construction

[0024] 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 creative efforts fall within the protection scope of the present invention.

[0025] See figure 1 , a kind of digital image parallel encryption method based on chaos theory of the present invention, comprises the step

[0026] S1: Globally scramble the plaintext image using a chaotic sequence;

[0027] S2: divide the plaintext image into several parts;

[0028] S3: perform parallel local diffusion on each plaintext image, and exchange the last pixel of each plaintext image with the first pixel of the next plaintext image;

[0029] S4: Rep...

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Abstract

The invention discloses a chaos theory-based digital image parallel encryption method comprising the following steps: a chaotic sequence is used for subjecting a plaintext image to overall position scrambling operation, the plaintext image is divided into a number of parts, each part of the plaintext image is subjected to parallel local dispersal operation, a last pixel of each part of the plaintext image and a first pixel of a next part of the plaintext image are swapped, and the last step is repeated till overall dispersal of the plaintext image is completed. Compared with technologies of the prior art, the chaos theory-based digital image parallel encryption method is advantageous in that differential attacks and statistical characteristic analysis can be well resisted, chose-plaintext or cryptograph attacks can be also effectively resisted, large secret key space and good encryption effect can be exerted, and parallel calculating capability of a computer multinucleated cpu can be effectively used for effectively improving calculating speed and encryption performance.

Description

technical field [0001] The invention relates to the field of information security, in particular to a digital image parallel encryption method based on chaos theory. Background technique [0002] Chaos is one of the three important discoveries in physics in the 20th century alongside quantum mechanics and relativity. Chaos phenomenon refers to the fact that in a certain nonlinear system, without adding any random factors, due to its own internal interaction, it behaves similarly. A phenomenon of random processes. The inherent characteristics of chaos are very consistent with the basic requirements of cryptography. For example: firstly, the extreme sensitivity of the chaotic system to the initial conditions makes the key space of the cryptosystem wider and the key sensitivity is extremely strong; secondly, the chaotic signal generated by the chaotic system is non-periodic and non-convergent, and has a good The randomness and complexity of the signal, so this characteristic ...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 谢国波王添
Owner GUANGDONG UNIV OF TECH
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