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Color image encryption method based on lifting scheme and cross-component scrambling

A color image, encryption method technology, applied in image data processing, image data processing, computer security devices and other directions, can solve the problem of all black and all white image scrambling is invalid

Active Publication Date: 2021-07-06
HENAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that the image encryption algorithm under the traditional scrambling-diffusion framework often has invalid scrambling for all-black and all-white images, the present invention provides a color image encryption method based on the lifting scheme and cross-component scrambling, combining the lifting scheme, Cross-component scrambling and non-sequential diffusion can encrypt color plaintext images into ciphertext images that cannot recognize the content of the original image, thus meeting people's needs

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  • Color image encryption method based on lifting scheme and cross-component scrambling
  • Color image encryption method based on lifting scheme and cross-component scrambling
  • Color image encryption method based on lifting scheme and cross-component scrambling

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Embodiment approach

[0155] As an embodiment, the target location of the pixel movement of the matrix PR in the value of the matrix PR includes:

[0156] When e (i, j) = 0, indicating the first (i, j) of the first (i, j) blocks in the pixel replacement matrix VR to be used in the matrix PR, paragraphs (i, s (i, j) ) Pixel;

[0157] When e (i, j) = 1, the first (i, j) of the first (i, j) blocks in the pixel replacement matrix Vg of the first line of the first column to be used in the matrix PR is indicated by the first (i, s (i, j) ) Pixel;

[0158] When e (i, j) = 2, indicating the first (i, j) of the first (i, j) blocks in the pixel replacement matrix Vb in the first column of the matrix PR, paragraphs (i, s (i, j) ) Pixel;

[0159] Wherein, the position of the block and the inner pixels are arranged prioritize, and S (i, j) represents the value of the No. j column in the matrix S, W (I, S (I, J)) represents the matrix. The value of the first line of the first line of the first line, and S (i, j) ∈ [...

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Abstract

The invention provides a color image encryption method based on a lifting scheme and cross-component scrambling. The method comprises the following steps of calculating according to a Hash value of a color plaintext image and a preset external key to obtain three initial values of a Lorentz-Hash laser chaotic system; generating three chaotic sequences O, P and Q by adopting the Lorentz-Hakkine laser chaotic system; carrying out RGB decomposition on the color plaintext image to obtain three matrixes IR, IG and IB; pre-processing the matrixes IR, IG and IB by adopting the chaotic sequences O, P and Q and based on an image pre-processing strategy of a lifting scheme to obtain three sequences CR, CG and CB; performing cross-component scrambling on the three sequences CR, CG and CB by using the chaotic sequences O, P and Q to obtain three matrixes VR, VG and VB; diffusing the three matrixes VR, VG and VB by using the chaotic sequences O, P and Q to obtain three ciphertext matrixes CIR, CIG and CIB; and synthesizing the three ciphertext matrixes CIR, CIG and CIB to obtain a ciphertext image.

Description

Technical field [0001] The present invention relates to the field of image encryption, and more particularly to a color image encryption method based on lifting schemes and span components. Background technique [0002] In recent years, multimedia communications accounts for an important status in people's communications, and the multimedia data stored and sent daily, ensuring the security and privacy of relevant data to become the urgency challenges facing security experts. Unfortunately, traditional encryption schemes such as AES, DES, and RSA are designed for text data, not suitable for encryption for images because images are large, high redundancy, strong correlation. Therefore, relevant experts have proposed many new image encryption programs based on different theories and technologies. The chaotic system has the characteristics of unpredictability, non-periodic, high sensitivity to the initial value, very compliant with the basic requirements of cryptography, and the chao...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F21/62G06N7/08G06T1/00
CPCG06F21/602G06F21/6209G06T1/0021G06N7/08
Inventor 柴秀丽陈绣辉宋世平付江豫甘志华路杨
Owner HENAN UNIVERSITY
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