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Image encryption method based on compressed sensing and three-dimensional cat mapping

A compressed sensing and three-dimensional technology, applied in image data processing, image data processing, instruments, etc., can solve the problems that ciphertext images are easy to attract the attention of attackers and be attacked

Active Publication Date: 2019-02-19
HENAN UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] However, the noise-like or texture-like ciphertext images generated by the above encryption sche

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  • Image encryption method based on compressed sensing and three-dimensional cat mapping
  • Image encryption method based on compressed sensing and three-dimensional cat mapping
  • Image encryption method based on compressed sensing and three-dimensional cat mapping

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Embodiment Construction

[0092] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0093] Compressive Sensing (CS) theory is a new type of sampling theory proposed by D.Donoho, E.Candes and T.Tao et al. For sparse signals or compressible signals, it is much lower than Nyquist sampling The sampling rate under the theoretical limit samples, compresses and encrypts the data at the same time, breaking through the bottleneck of Shannon's sampling theorem, so that th...

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Abstract

The invention provides an image encryption method based on compression sensing and three-dimensional cat mapping. The method comprises the following steps: 1, calculating the initial state value and system parameters of a three-dimensional cat map chaotic system according to the pixel average value I of a plaintext image P, and scrambling the sparse coefficient matrix of P by zigzag; 2, bringing that initial state value and the system parameter into a three-dimensional cat map chaotic system, constructing a measurement matrix, and compressing and measuring the scrambled sparse coefficient matrix by the measurement matrix to obtain a ciphertext image F; 3, embedding F into that carrier image R accord to the LSB least significant bit embedding algorithm to obtain a visual safety image E. Theinvention can make the ciphertext image visually safe. Thus, when the ciphertext image is transmitted or stored together with other images, an attacker cannot find the ciphertext image from a plurality of meaningful images, thereby ensuring the safety of the ciphertext image or the related plaintext image.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method based on compressed sensing and three-dimensional cat mapping. Background technique [0002] With the development of digital technology and the Internet, more and more digital images are generated and transmitted through the network, and are stored on different "cloud" platforms. Since these multimedia data may contain confidential information, preventing the leakage of these important information has become a major concern of people. Image encryption is an effective method to protect the security of image data. [0003] Many image encryption algorithms currently proposed can be divided into frequency domain image encryption algorithms and spatial domain image encryption algorithms. Usually, frequency-domain image encryption algorithms are designed to change image data in the frequency domain or change transformation functions, such as discre...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06F21/60
CPCG06F21/602G06T1/0021
Inventor 柴秀丽武海洋袁彩虹路杨张苗辉支相丞毕建强
Owner HENAN UNIVERSITY
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