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Image encryption method based on block scrambling and state conversion

A technology of state transition and encryption method, which is applied in the field of information security and can solve problems such as unreliable image encryption method and information leakage.

Active Publication Date: 2021-02-26
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that the existing image encryption method is unreliable and easily leads to information leakage, the present invention proposes an image encryption method based on block scrambling and state transition, which conforms to the one-time password system and can effectively resist chosen / known attacks. Better protection of image information

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  • Image encryption method based on block scrambling and state conversion
  • Image encryption method based on block scrambling and state conversion
  • Image encryption method based on block scrambling and state conversion

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Embodiment Construction

[0058] 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.

[0059] like figure 1 As shown, an image encryption method based on block scrambling and state transition includes four parts: key generation, block scrambling, state transition and ciphertext diffusion. Specifically, the steps are as follows:

[0060] Step 1: Input the original image matrix P whose size is M×N, and use the key generation system to process the image matrix P to generate the initial iteration parameter x 0 、y 0 ,z 0 and u 0 , the initial ite...

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Abstract

The invention provides an image encryption method based on block scrambling and state conversion, and the method comprises the steps: carrying out the processing of an image matrix through a secret key generation system, generating an initial iteration parameter, inputting the initial iteration parameter into a four-wing 4D chaotic system, and carrying out the iteration to generate four chaotic sequences; intercepting the chaotic sequence and performing descending sort to obtain row and column scrambling vectors to generate a scrambling matrix; scrambling the scrambling matrix by using a scanning curve; scrambling the image matrix by using the scrambled matrix to obtain a pixel scrambling matrix, and performing DNA encoding and chaotic sequence input on the pixel scrambling matrix to determine a finite state automaton to obtain a state conversion sequence; performing DNA decoding on the state conversion sequence to obtain a state conversion sequence; and diffusing the state transitionsequence E by using the chaotic sequence to obtain an encrypted image. The scrambling method can effectively break the correlation of adjacent pixels, can resist various attacks, is high in safety, ensures safe transmission of images, and is very suitable for image encryption.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an image encryption method based on block scrambling and state transition. Background technique [0002] With the development of communication technology, information security has been paid more and more attention by people. As a carrier of a large amount of information, digital images are extremely important to prevent them from being stolen during network transmission. The use of image encryption technology can improve the security of digital images during network transmission to a certain extent. Although text encryption techniques already have sufficient security, for example, methods represented by DES, AES, and SM4 algorithms have been widely used. However, digital images have a large amount of data, high redundancy, and strong correlation between adjacent pixels, so text encryption technology is not suitable for encrypting digital images. [0003] Chaotic s...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04L9/06H04L9/20H04L29/06
CPCH04L9/001H04L9/0643H04L9/0656H04L9/0861H04L63/0428
Inventor 张勋才郑新华赵志明赵艺芳焦洋洋吴涛王时达王延峰牛莹张建伟张焕龙
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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