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Image encryption algorithm based on dynamic DNA coding and double chaotic mapping

An encryption algorithm and double-chaos technology, applied in the field of digital image encryption algorithm, can solve problems such as low security and no dynamics

Active Publication Date: 2016-09-21
苏州龙浩科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] At present, image encryption based on DNA coding mostly uses a relatively fixed coding method for image coding and encryption, that is, one coding method is used for one encryption, and there is no dynamic, so the security is not high

Method used

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  • Image encryption algorithm based on dynamic DNA coding and double chaotic mapping
  • Image encryption algorithm based on dynamic DNA coding and double chaotic mapping
  • Image encryption algorithm based on dynamic DNA coding and double chaotic mapping

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Embodiment Construction

[0028] 1. The initial value of the Lorenz chaotic map is x=0.256, y=0.359 and z=0.789, the initial value of the Chen hyperchaotic map is x=0.357, y=0.159, z=0.753 and q=0.456, and the parameter is k=0.3.

[0029] 2, figure 1 (a)- figure 1(c) is the encryption and decryption effect diagram obtained from the simulation experiment for the 256×256 Lena grayscale image. figure 1 (a) is the original image of Lena, figure 1 (b) is an encrypted image, figure 1 (c) is the decrypted image.

[0030] 3. figure 2 (a)- figure 2 (b) is the effect diagram of the gray histogram analysis of the Lena image before and after encryption. Through comparison, it can be found that the pixel values ​​of the gray histogram before encryption are concentrated on some values, but the pixel distribution of the gray histogram of the image after encryption is relatively uniform, which shows that the encrypted image obtained by using the encryption algorithm is very good. Difficult to be cracked by st...

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Abstract

Provided is an image encryption algorithm based on dynamic DNA coding and double chaotic mapping, comprising two portions one portion scrambling row pixel positions of images through a chaotic sequence generated by Lorenz chaotic mapping, meanwhile, Lorenz chaotic mapping being used as basis for dynamically selecting DNA operation rules; and the other portion scrambling row pixel values of images through Chen chaotic mapping and DNA coding. Finally, the image encryption algorithm is obtained through the combination of the two portions, and can encrypt images of any sizes.

Description

Technical field: [0001] The invention relates to a digital image encryption algorithm, in particular to an image encryption algorithm based on dynamic DNA coding and double chaotic mapping. Background technique: [0002] With the continuous advancement of the national informatization process, people pay more and more attention to the confidential transmission of image information. The traditional classic encryption algorithms mainly include: DES algorithm, IDEA algorithm, and RSA algorithm, etc., but images have a larger value than text files. The amount of data, so the traditional encryption algorithm is not suitable for encrypting images. So some image encryption technologies based on mathematical transformations have appeared one after another, but the security is not outstanding enough. [0003] Chaotic encryption technology has been the mainstream encryption technology in recent years, but it is not safe enough if only chaotic technology is used. In recent years, imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 张健侯德智任洪娥
Owner 苏州龙浩科技有限公司
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