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Image encryption method based on Arnold transformations and Henon chaotic system

An encryption method and chaotic system technology, applied in transmission systems, image communication, digital transmission systems, etc., can solve problems such as the inability of image scrambling to reach an ideal state, and the single change of pixel position.

Inactive Publication Date: 2013-12-11
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] But sometimes a single method of changing the pixel position cannot make the scrambling of the image reach a more ideal state

Method used

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  • Image encryption method based on Arnold transformations and Henon chaotic system
  • Image encryption method based on Arnold transformations and Henon chaotic system
  • Image encryption method based on Arnold transformations and Henon chaotic system

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Embodiment Construction

[0033] The image encryption method based on Arnold transform and Henon chaotic system first performs multiple Arnold scrambling transformations on the image, then uses Henon chaotic sequence to scramble it twice, and then uses Henon chaotic sequence to perform bitwise XOR operation with the image to change The pixel value of the image.

[0034] 1. Arnold transformation:

[0035] Suppose the image coordinates of a binary digital image are , then the Arnold transform is defined as:

[0036] mod N (1)

[0037] in The matrix is ​​called the transformation matrix, is the coordinate position of the image pixel after the Arnold transformation, mod means modulo operation, is the order of the image. The Arnold transformation is periodic, that is, after several Arnold transformations, the image will be transformed into the original image.

[0038] 2. Henon chaotic system:

[0039] The Henon chaotic system is a two-dimensional dynamical system whose equatio...

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Abstract

The invention relates to an image encryption method based on Arnold transformations and a Henon chaotic system. Firstly, a plurality of Arnold scrambling transformations are carried out on images, then scrambling is carried out for a second time on the images through use of a Henon chaotic sequence and then the Henon chaotic sequence is used to carry out a bit-by-bit XOR operation with images to change pixel values of the images. The two technologies are adopted to carry out pixel-value position scrambling twice so that the scrambling degree of the images is higher compared with a single scrambling technology and then the chaotic sequence is adopted to change the pixel values so that any information related to plaintext is completely hidden in the encrypted images. Therefore, the method has the advantages of being great in safety and high in anti-attack ability and the like.

Description

technical field [0001] The invention relates to an information encryption technology, in particular to an image encryption method based on Arnold transformation and Henon chaotic system. Background technique [0002] With the continuous development of multimedia technology, digital images have overcome the problems of storage and transmission caused by the large amount of data in the past, and it is becoming a mainstream way of expressing information. While network communication has brought us various conveniences and benefits, various security risks have also followed. The continuous occurrence of hacker incidents and online piracy have made people worry about the security of network communication and seriously restricted the Internet. further development of the application. Not only that, some information also involves national security aspects, such as drawings of military facilities, pictures taken by military satellites, maps of new weapons, etc. Therefore, the protec...

Claims

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Application Information

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IPC IPC(8): H04N1/32H04L9/00
Inventor 杜翠霞张定会张宗楠
Owner UNIV OF SHANGHAI FOR SCI & TECH
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