Image hybrid encrypting method based on hyperchaotic system

A technology of image mixing and encryption methods, which is applied in image data processing, image data processing, instruments, etc., and can solve problems such as poor security, complicated operation process, and inconvenient use

Inactive Publication Date: 2015-06-03
LIUZHOU VOCATIONAL & TECHN COLLEGE
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  • Abstract
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Problems solved by technology

[0005] In the process of realizing the present invention, the inventor found that there are at least defects such as complicated operation process, inconvenient use and poor safety in the prior art

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  • Image hybrid encrypting method based on hyperchaotic system
  • Image hybrid encrypting method based on hyperchaotic system
  • Image hybrid encrypting method based on hyperchaotic system

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Embodiment Construction

[0049] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0050] Due to the low dimensionality of the digital image encryption algorithm of the chaotic system, there are problems such as low security and small key space. In order to improve the security of confidential image transmission, an image hybrid encryption scheme is proposed based on hyperchaotic sequences. Both position scrambling and pixel replacement are added to each iteration, so that the encrypted data stream is correlated with plaintext information everywhere, which makes up for the shortcomings and shortcomings of traditional algorithms in application. Simulation results show that the image encryption algorithm has the advantages of large key space, good c...

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Abstract

The invention discloses an image hybrid encrypting method based on a hyperchaotic system. The image hybrid encrypting method based on the hyperchaotic system comprises the following steps: a, scrambling the original images according to an Arnold conversion; b, performing termwise scanning the scrambled images, and converting the gray values of the scrambled images to a sequence with a preset dimension; c, iterating the hyperchaos with a preset step length according to a fourth-order Runge-Kutta method, and generating four groups of original hyperchaotic sequences; d, rearranging the generated hyperchaotic sequences into the images with a preset dimension to obtain the encrypted images. The image hybrid encrypting method based on hyperchaotic system, provided by the invention is capable of overcoming the shortcomings of a complex operation process, inconvenient use and poor safety in the prior art, so that the advantages of simple in operation process, convenient in use and excellent in security are achieved.

Description

technical field [0001] The invention relates to the technical field of data encryption, in particular to an image mixing and encryption method based on a hyperchaotic system. Background technique [0002] Because multimedia information has the characteristics of strong intuition and large amount of information, coupled with the maturation of related technologies, it is very common to express information in multimedia forms such as images, sounds, and videos. In particular, digital images contain more information than sound, text, etc., and thus occupy a pivotal position in multimedia information. When image data owners transmit images on the network, in order to protect their own interests, they need to process the transmitted images through reliable digital image information protection technology. As a unique nonlinear phenomenon, chaos has a series of excellent characteristics such as good pseudo-randomness, unpredictability of orbit, extreme sensitivity to initial values...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 邓奎彪韦小波杨敬桑张德平赖兆磬杨洁孔轶艳罗桂湘
Owner LIUZHOU VOCATIONAL & TECHN COLLEGE
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