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Image Encryption Algorithm Based on DNA Code and Chaos Map

An encryption algorithm and chaotic mapping technology, which is applied in the field of image encryption algorithm based on DNA coding and chaotic mapping, and can solve the problem of low security.

Active Publication Date: 2016-08-10
HEILONGJIANG TUOMENG TECH CO LTD
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Problems solved by technology

However, the security of using DNA code encryption alone is not high, so this algorithm combines DNA code with chaotic encryption technology, thus effectively improving the security of the image encryption algorithm

Method used

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  • Image Encryption Algorithm Based on DNA Code and Chaos Map
  • Image Encryption Algorithm Based on DNA Code and Chaos Map
  • Image Encryption Algorithm Based on DNA Code and Chaos Map

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Embodiment Construction

[0031] 1, figure 1 It is an image encryption algorithm flow chart based on DNA coding and chaotic mapping; in order to illustrate the specific implementation of the present invention more intuitively, taking the image of 4 * 4 as an example, utilizing the image encryption algorithm based on DNA coding and chaotic mapping specifically includes the following steps:

[0032] (1) Convert the grayscale image I with a size of 4×4 into a two-dimensional matrix I 1 As shown in Figure 2(a),

[0033] (2) Through the initial value of a 0 = 0.3575123321123321 and b 0 =0.5575123321123321, the parameter is μ a = 3.775123321123321 and μ b = 3.875123321123321 Logistic mapping obtained two one-dimensional pseudo-random sequences, respectively for the matrix I 1 The two-dimensional matrix I' after row and column transformation is shown in Figure 2(b)

[0034] (3) Convert the image I′ into a binary two-dimensional matrix I″ with 16 rows and 8 columns, as shown in Figure 2(c). When the ran...

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Abstract

The image encryption algorithm based on DNA coding and chaotic map includes the following steps: firstly, through the index table generated by the one-dimensional logical chaotic map, the positions of the pixels in the rows and columns of the digital image are exchanged respectively, so as to achieve the scrambling of the image pixels Purpose; then express each pixel value after scrambling with 4 DNA codes, and then use Chebyshev mapping to perform a series of iterative operations to obtain a one-dimensional sequence; then use this sequence to encode the already coded DNA sequence according to a certain The corresponding complementary replacement is performed according to the rules; finally, the obtained pixel value is restored to an image, which is the encrypted image. Experimental results and security analysis prove that the algorithm not only can achieve good encryption effect, but also has a large enough key space to resist general attacks.

Description

Technical field: [0001] The invention relates to a digital image encryption algorithm, in particular to an image encryption algorithm based on DNA coding and chaotic mapping. Background technique: [0002] With the development of science and technology and society, the computer industry has occupied a dominant position in the world, and the application of digital images, a small branch thereof, has become more and more extensive. Digital images have become one of the most popular forms of multimedia at present, and are widely used in politics, economy, national defense, education and so on. However, due to the openness of the network, the security of image transmission has been threatened to a certain extent. For some special fields, such as military, commercial and medical, digital images also need to meet higher confidentiality requirements. Therefore, image encryption technology has become an effective method to protect the transmitted images. In order to encrypt digit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 张健房东鑫张语桐
Owner HEILONGJIANG TUOMENG TECH CO LTD
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