Color image encryption method based on compressed sensing and deformation coupling mapping lattices

A technology of coupling image and encryption method, which is applied in the field of information security, can solve the problems of small amount of calculation, lack of adaptability, space occupied by storage and transmission, etc., and achieve the goal of reducing size, reducing storage space and transmission bandwidth, and having good application prospects Effect

Active Publication Date: 2020-06-23
HENAN UNIVERSITY
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Problems solved by technology

Although this kind of sparse transformation has a small amount of calculation and is convenient for transformation, it uses the same transformation method for all different images and lacks adaptability.
Moreover, the measurement matrix of some algorithms is composed of Gaussian random matrix, Bernoulli matrix, Toeplitz measurement matrix or circular measurement matrix, which takes up a lot of space in the process of storage and transmission.

Method used

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  • Color image encryption method based on compressed sensing and deformation coupling mapping lattices
  • Color image encryption method based on compressed sensing and deformation coupling mapping lattices
  • Color image encryption method based on compressed sensing and deformation coupling mapping lattices

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and technical solutions.

[0030] Embodiment of the present invention, see figure 1 As shown, a color image encryption method based on compressive sensing and deformable coupled map lattice is provided, including:

[0031] S101) Separate the three primary color components of the color plaintext image to obtain three component matrices; and combine the initial key, update the parameters and initial values ​​of the deformed coupling image grid through the SHA-256 function, iterate the space-time chaotic system, obtain the chaotic sequence, and construct measurement matrix, key stream;

[0032] S102) The component matrix is ​​divided into non-overlapping blocks respectively, and each image block is converted into a column vector, and then the col...

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Abstract

The invention belongs to the technical field of information security, and particularly relates to a color image encryption method based on compressed sensing and deformation coupling mapping lattices,which comprises the following steps: separating three primary color components of a color plaintext image to obtain a component matrix; updating parameters and initial values of the deformation coupling image grids through an SHA-256 function in combination with the initial key, and obtaining a measurement matrix and a key stream through an iterative space-time chaotic system; segmenting the component matrix and obtaining a new image matrix; generating a sparse dictionary for the new image matrix; measuring a new image by using the measurement matrix to obtain an intermediate image; converting the intermediate image into a coefficient matrix, and executing scrambling and diffusion operations in a frequency domain to obtain a scrambling diffusion matrix; and performing pixel-level diffusion operation on the scrambling diffusion matrix by using the key stream matrix to obtain a final ciphertext image. Statistics, known and selected plaintexts, selected ciphertext attacks and the like are effectively resisted, the safety and the encryption effect are improved, and the method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a color image encryption method based on compressed sensing and deformable coupled image lattices, which realizes digital image encryption by using compressed sensing technology, space-time chaotic system and frequency domain transformation for color images. Background technique [0002] With the popularization of computer network and multimedia technology, mobile phones, computers, tablets and other electronic devices have spread to all areas of people's production and life. Various data information is transmitted and stored on these electronic devices by means of the network. Most of these information are digital images. This is because digital images can display the content of information with vivid, intuitive and vivid features. However, in the process of transmission and storage, digital image information may encounter security issues such as acciden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/18H04N19/182H04N19/186H04N19/46H04N19/86H04L9/00
CPCH04N19/176H04N19/18H04N19/182H04N19/186H04N19/46H04N19/86H04L9/001
Inventor 武相军朱凯歌王慧李海平程锦丽孔凯
Owner HENAN UNIVERSITY
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