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Image Encryption Method and Device Based on Discrete Fractional Transform and Chaotic Function

A chaotic function and image technology, which is applied in the direction of secure communication through chaotic signals, secure communication devices, digital data protection, etc., can solve the problems of high linearity and reduced ideal encryption effect of image encryption

Active Publication Date: 2021-05-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the encryption algorithm of discrete fraction transform is directly applied to the image data for numerical operation encryption, the image data in the encryption appears to have a high linearity, which forces the ideal encryption effect of image encryption to decrease.

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  • Image Encryption Method and Device Based on Discrete Fractional Transform and Chaotic Function
  • Image Encryption Method and Device Based on Discrete Fractional Transform and Chaotic Function
  • Image Encryption Method and Device Based on Discrete Fractional Transform and Chaotic Function

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Embodiment Construction

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0065] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The present invention provides an image encryption method based on discrete fractional transform and chaotic function, comprising: converting the data type of the received image data matrix of the image to be encrypted into a floating-point type image data matrix, applying a preset chaotic function to Process the image data matrix of the floating-point number type, perform discrete fractional transformation on the processed image data matrix, and perform value range conversion on the obtained discrete random transformation matrix to obtain the image data conversion matrix, and scramble the image data matrix Operation, to realize the encryption of the image to be encrypted, and associate and save the encrypted data of the image to be encrypted and the conversion ratio when the value range is converted. By applying the present invention, the image to be encrypted can be encrypted, and by scrambling the image data of the image to be encrypted, the linearity of the image data of the image to be encrypted is effectively reduced or eliminated when the offline random transformation is performed, and the image data to be encrypted is improved. encryption effect.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method and device based on discrete fractional transformation and chaotic functions. Background technique [0002] With the popularization of the Internet and the emergence of corresponding network media, in people's daily life, people have more and more demands for images in various aspects, such as the exchange of image information in interpersonal communication, the use of image information for their own entertainment, etc. demand etc. In the dissemination and application of image information, the security issues caused by the dissemination of image information have been increasingly concerned by people, and the encryption of image information before transmission has become the mainstream of modern society. [0003] There are many algorithms for encrypting pictures, such as the traditional data encryption algorithm based on RSA algorithm and DES a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60H04L9/00
CPCG06F21/602H04L9/001
Inventor 顾国生卢辉鸿吴培新邓杰航
Owner GUANGDONG UNIV OF TECH