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Image scrambling encryption method

A technology for scrambling encryption and images, which is applied in image data processing, image data processing, instruments, etc., and can solve the problem of low encryption strength.

Inactive Publication Date: 2012-05-30
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the encryption strength of Arnold transform is not high

Method used

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  • Image scrambling encryption method
  • Image scrambling encryption method
  • Image scrambling encryption method

Examples

Experimental program
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Effect test

example 1

[0088] Example 1: Here is the Arnold transform extended to 3 dimensions and its inverse transformation matrix.

example 2

[0089] Example 2: T = 1 1 1 2 2 1 2 1 1 , R = 1 0 - 1 0 - 1 1 - 2 1 0 .

example 3

[0090] Example 3: T = 3 2 1 2 2 1 1 1 1 , R = 1 - 1 0 - 1 2 - 1 0 - 1 2 .

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Abstract

The invention provides an image scrambling encryption method. The method comprises the following steps: (1) determining whether a two-dimensional plane image to undergo scrambling encryption is square; (2) if the two-dimensional plane image is not square, expanding the two-dimensional plane image to the square image; (3) selecting a transformation matrix T shown in the specification, wherein eachcoefficient in the transformation matrix T is an integer and t00*t11-t01*t10 is equal to + / -1; (4) using the selected transformation matrix T to transform the square image; and (5) repeating the steps (3) and (4) until the transformation times reaches the predetermined times, thus carrying out scrambling encryption on the two-dimensional plane image.

Description

technical field [0001] The present invention relates to image encryption, more specifically, to an image scrambling encryption method. Background technique [0002] Image scrambling is to move the position of each image point in the digital dot matrix image to another position, making it a messy image, so that the original image cannot be recognized. As an encryption technology, image scrambling has become one of the important means for secure transmission of digital images, digital watermark encryption and secure storage of images. In image encryption, scrambling technology is mainly concerned with encryption strength or decryption difficulty, and whether the overhead (time and calculation) of image scrambling and restoration is as small as possible. At present, the more scrambling techniques are based on Arnold transform, magic square transform, fractal Hilbert curve, Gray code transform, chaotic sequence and so on. [0003] Among the above methods, the Arnold transform ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 范京李红莲
Owner BEIJING INFORMATION SCI & TECH UNIV