Color image encryption method and device

A color image, encryption method technology, applied in the field of image processing, can solve problems such as hidden dangers, a lot of computing time, poor security, etc.

Active Publication Date: 2018-01-19
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] Traditional encryption algorithms, such as AES (Advanced Encryption Standard Algorithm), DES (Data Encryption Standard Encryption Algorithm), and RSA (Public Key Encryption Algorithm) algorithms require a lot of computing time to encrypt data images, and there are potential security risks. Due to chaos The system has the characteristics of pseudo-randomness and sensitivity to the initial value, which can avoid the above problems to

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  • Color image encryption method and device
  • Color image encryption method and device
  • Color image encryption method and device

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Embodiment Construction

[0075] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.

[0076] The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device compris...

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Abstract

The embodiments of the present invention disclose a color image encryption method and a device. The method comprises the following steps of subjecting a RGB component of a to-be-encrypted plaintext color image to the two-dimensional pixel scrambling treatment by using a non-periodic two-dimensional Cat transformation with a pixel value to be unchanged; subjecting the gray value of each pixel of the plaintext color image after the scrambling treatment to the operation of XOR together with three groups of chaotic sequences obtained through the mapping of Henon_Kent so as to obtain intermediate ciphertext components; subjecting an intermediate ciphertext matrix formed by intermediate ciphertext components to the gray value exchange of pixels by using the non-periodic three-dimensional Cat transformation, and iteratively conducting the operation for t times (t is a positive integer); successively circulating and executing the above steps for T times (T is a positive integer), and outputting the encrypted image of the plaintext color image. The key space is enlarged, so that the security of color image encryption is improved. The method and the device are good in robustness, and variousattack means can be effectively resisted.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of image processing, and in particular, to a color image encryption method and device. Background technique [0002] With the rapid development of Internet technology and image processing technology, users have higher and higher requirements for the security of digital audio, digital image and other multimedia information transmission, digital image encryption technology has been developed accordingly, and the corresponding digital image security transmission issues is also becoming more and more important. [0003] Traditional encryption algorithms, such as AES (Advanced Encryption Standard Algorithm), DES (Data Encryption Standard Encryption Algorithm), and RSA (Public Key Encryption Algorithm) algorithms require a lot of computing time to encrypt data images, and there are potential security risks. Due to chaos The system has the characteristics of pseudo-randomness and sensitiv...

Claims

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Application Information

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IPC IPC(8): G06T9/00
Inventor 谢国波陈志伟邓华军
Owner GUANGDONG UNIV OF TECH
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