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Multi-image scrambling method based on chaos and block rotation

A block rotation and multi-image technology, which is applied in image data processing, graphic image conversion, and secure communication through chaotic signals, can solve problems such as low encryption efficiency, weak security, and limited image encryption capacity, and achieve secure encryption effects. The effect of protecting safety

Active Publication Date: 2021-06-15
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Purpose of the present invention: In order to solve the problems of limited encryption capacity, low encryption efficiency or weak security of existing images, a multi-image scrambling method based on chaos and block rotation is proposed

Method used

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  • Multi-image scrambling method based on chaos and block rotation
  • Multi-image scrambling method based on chaos and block rotation
  • Multi-image scrambling method based on chaos and block rotation

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Embodiment Construction

[0036] The implementation process of the present invention will be further described in detail below with reference to the specific drawings and examples.

[0037] figure 1 is the encryption flow chart of this method.

[0038] The programming software used is Matlab R2020a, select figure 2 The 10 images of size 512 × 512 are shown as the original image set.

[0039] Step 1: Image Stereoscopic: Let 10 original images of size 512×512 be I 1 , I 2 , …, I 10 , combine them into an image cube of size 512×512×10 in the given order C ,like image 3 shown.

[0040] Step 2: Image cube tile: put C Divide it into cubes of size 2×2×2, you can get a s A collection of cubes composed of elements B 1 ={ b i 1}, s =327680, b i 1 for any cube.

[0041] Step 3: Generate chaotic sequence: First, randomly select the initial chaotic system of Chen x 0 1 =0.3452, y 0 1 =0.5448, z 0 1 =0.4679, iterate 327680 times according to formula (1), and get 3 chaotic sequences o...

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Abstract

The invention discloses a multi-image scrambling method based on chaos and block rotation, and belongs to the field of information encryption. At present, network transmission and storage of batch images become increasingly frequent. In order to protect network transmission and storage security of multi-image content, the invention defines concepts of cube rotation and cube revolution, and designs a multi-image scrambling method based on chaos and block rotation. The method comprises the following steps: firstly, combining k original images into an image cube, and carrying out blocking operation to form a cube set; secondly, performing cube rotation and cube revolution on the cubes with the concentrated vertical cubes; thirdly, scrambling the vertical block set by using chaos; and finally, combining the scrambled cubic block sets to generate k scrambled images. Experimental results show that the method can encrypt a plurality of interactive images at the same time, and is good in encryption effect, high in security and efficient.

Description

technical field [0001] The method relates to an information encryption technology, in particular to an image encryption method. Background technique [0002] In the era of big data, in many fields such as daily life, commercial trade, national defense and military, massive amounts of image information are transmitted through the Internet every day, and there is a risk of information leakage in this process. Based on this, researchers have proposed a variety of image encryption methods. At present, these methods have problems such as limited encryption capacity, low encryption efficiency or weak security. [0003] The commonly used methods of image encryption include scrambling and diffusion. Scrambling refers to scrambling the position of pixels in the image, and diffusion refers to changing the pixel value in the image. [0004] In order to improve the security and efficiency of multi-image encryption, the concepts of cube rotation and cube revolution are defined, and a m...

Claims

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Application Information

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IPC IPC(8): H04L9/00G06T3/60
CPCH04L9/001G06T3/602
Inventor 张晓强廖菁菁
Owner CHINA UNIV OF MINING & TECH
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