Image encryption method based on chaos theory and DNA splice model

A technology of chaos theory and DNA sequence, applied in the field of information security, can solve problems such as impracticality, and achieve the effect of image encryption protection, good encryption effect, and reduced possibility of decryption

Inactive Publication Date: 2010-06-02
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DNA encryption is a new field of cryptography that has emerged with the research of DNA computing in recent years. It is characterized by using DNA as an information carrier and using modern biotechnology as a tool to exploit the inherent advantages of DNA, such as high storage density and high parallelism. Realize cryptograp

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  • Image encryption method based on chaos theory and DNA splice model
  • Image encryption method based on chaos theory and DNA splice model
  • Image encryption method based on chaos theory and DNA splice model

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Embodiment Construction

[0040] combine image 3 The implementation process of the present invention is described in detail, but the protection scope of the present invention is not limited to the following examples.

[0041] Embodiment has adopted Lena color image, and image size is 512*512, and concrete encryption process is as follows:

[0042] 1. Image preprocessing

[0043] What the present invention relates to is the encryption of the grayscale image, so the rgb2gray function of Matlab is adopted to convert the Lena image into the grayscale image.

[0044] 2. DNA encoding of images

[0045] (1) The image grayscale matrix is ​​converted into binary

[0046] The pixel size of Lena's grayscale image is 512×512, and the grayscale value is between [0, 256]. Using Matlab's dec2bin function, the image matrix is ​​converted into a binary matrix.

[0047] (2) Select coding rules

[0048] It can be seen from step 2 of the technical solution that there are 8 optional encoding rules, and one of them is...

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Abstract

The invention discloses an image encryption method based on a chaos theory and a DNA splice model. DNA encryption belongs to a new cryptology field arising along with the DNA computation in recent years. The image encryption method is characterized in that DNA is used as an information carrier, the modern biological technology is used as an implementation tool, high storage density and high parallelization and the like of the DNA are developed, and cryptology functions of encryption, authentication, signature and the lie are realized. Because of a series of properties of wide frequency spectrum, random-like property, extreme sensitivity for structure parameters and initial state, and the like, a chaos system has the characteristic of difficult reconstruction and prediction, and is an important field of the cryptology research. By combining the advantages of the DNA cipher and the chaos theory, the invention provides an image grouping encryption technology based on a chaos and DNA splice model. The method comprises the steps of: firstly, setting a coding rule of the DNA, carrying out DNA coding and optimization on a secret image to obtain a DNA plaintext sequence and generate a corresponding chaos sequence; and setting DNA sequence grouping encryption algorithm based on the DNA splice calculation model according to the generated chaos sequence and the generated DNA plaintext sequence for realizing the information encryption of the image, thereby effectively improving the encryption effect of the information of the image.

Description

technical field [0001] The invention belongs to the field of information security, and in particular relates to an encryption method of a digital image, which is a method for encrypting a secret image in the field of information security. Background technique [0002] With the rapid development of digital technology and computer network, people can conveniently transmit various multimedia information through the network. However, because digital products are extremely easy to be copied, tampered, illegally disseminated and deliberately attacked, in order to ensure that information will not be stolen or tampered with during transmission, people are also concerned about the security of information transmission while enjoying the fast and convenient information transmission. and confidentiality put forward higher requirements. At the same time, today's world pattern has undergone earth-shaking changes, international relations have become increasingly complex, and the struggle ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/00
Inventor 周昌军张强魏小鹏
Owner DALIAN UNIVERSITY
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