Image fusion encryption method based on DNA sequences and multiple chaotic mappings

A technology of DNA sequence and chaotic mapping, which is applied in the fields of DNA calculation and digital image encryption, can solve the problems of high experimental sensitivity, expensive biological experimental equipment, and difficult control of the experimental environment.

Active Publication Date: 2010-05-12
DALIAN UNIV
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Problems solved by technology

Most of the existing DNA encryption-based algorithms need to be operated in biological experiments. Due to the shortcomings of expensive biological experimental equipment,

Method used

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  • Image fusion encryption method based on DNA sequences and multiple chaotic mappings
  • Image fusion encryption method based on DNA sequences and multiple chaotic mappings
  • Image fusion encryption method based on DNA sequences and multiple chaotic mappings

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Embodiment Construction

[0059] combine figure 1 The implementation process of the present invention will be described in detail, but not limited to this embodiment.

[0060] In the MATLAB7.1 environment, for two standard grayscale images of 256×256, the x 0 =0.3000000001,y 0 = 0.2000000001, z 0 = 0.6000000001, μ 1 = 3.6000000001, μ 2 =-0.5000000001, μ 3 =3.9000000001 to carry out the simulation experiment.

[0061] Step 1: Input lena grayscale image A(m,n) and template image B(m,n) see attached image 3 (a), (b), m, n are the row and column dimensions of images A and B, where m=256, n=256. Images A and B can be expressed in matrix form as shown in formula (5):

[0062] A = 101 107 . . . 203 100 ...

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Abstract

The invention discloses an image fusion encryption algorithm based on DNA sequences and multiple chaotic mappings, belonging to the field of DNA computation and image encryption. The traditional chaos-based encryption algorithm has the defects that the key space is small, the chaotic system is easy to be analyzed and predicted, and the like, and the existing image fusion based encryption method features difficult control of fusion parameters and low safety. To overcome the above defects, the invention first utilizes the two-dimensional chaotic sequence based scrambled coded original image and the template image which are generated by the Cubic mapping and the wavelet function to obtain two DNA sequence matrices, then carries out addition operation on the two scrambled DNA sequence matrices and finally utilizes the chaotic sequence generated by Logistic mapping and the DNA sequence matrices obtained by addition operation to interact to obtain the encrypted image. The experimental results show that the algorithm can effectively encrypt the digital images and has higher safety.

Description

technical field [0001] The invention relates to the fields of DNA calculation and digital image encryption, in particular to a digital image encryption method, which mainly uses the addition operation of DNA sequences combined with multi-chaotic mapping to realize image fusion to achieve the purpose of image encryption. Background technique [0002] In today's society, computer networks have changed the way people communicate, and people can conveniently transmit various multimedia information through the network. Due to the openness of the network, people pay more and more attention to the security and confidentiality of multimedia information. Digital image is an important information carrier in multimedia communication, so how to protect image information has become a common concern. [0003] Chaos has become the focus of researchers because of its characteristics of randomness, sensitivity to initial values, and difficulty in predicting. According to the object of scra...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06N3/12G06N7/08
Inventor 张强薛香莲魏小鹏
Owner DALIAN UNIV
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