Pixel and DNA cross dynamic chaotic cipher-based image encryption method and device

A technology of chaotic cipher and DNA sequence, applied in the field of image encryption and device based on pixel and DNA cross dynamic chaotic cipher, can solve the problems of low coding efficiency, irrelevant cipher text and easy to be cracked, etc., and achieve high security. Effect

Active Publication Date: 2018-01-16
SHANDONG ZHENGZHONG COMP NETWORK TECH CONSULTING
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Problems solved by technology

The researchers found that if the method uses binary encoding, the encoding efficiency is low; if the key is only controlled by a chaotic system, it can be easily cracked; at the same time, if the encryption system is based only on scrambling without diffusion, the ciphertext is not related to the plaintext
Although some researchers cracked an encryption system based on DNA technology, they found that only a part of the known plaintext / ciphertext can be used to reconstruct the equivalent key, and the ciphertext image cannot resist differential attacks

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  • Pixel and DNA cross dynamic chaotic cipher-based image encryption method and device
  • Pixel and DNA cross dynamic chaotic cipher-based image encryption method and device
  • Pixel and DNA cross dynamic chaotic cipher-based image encryption method and device

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[0062] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0063] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0064] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations the...

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Abstract

The present invention relates to a pixel and DNA cross dynamic chaotic cipher-based image encryption method and device. The method comprises the following processing of ranking the pixels of a plaintext image to obtain a first index matrix, and carrying out the first chaotic coding on the plaintext image according to the first index matrix to obtain a first intermediate image; ranking the rows andthe columns of the first intermediate image separately to obtain a row index matrix and a column index matrix, and scrambling the first intermediate image according to the row and column index matrixes to obtain a second intermediate image; converting each pixel in the second intermediate image into a 4-base DNA sequence, selecting eight kinds of coding rules satisfying a Watson-Crick complementrule according to the second chaotic coding, adopting the above eight kinds of coding rules to carry out the complementary DNA coding on each DNA sequence in the second intermediate image to obtain athird intermediate image, and then carrying out the DNA subtraction, add operation and xor operation on the third intermediate image to obtain a fourth intermediate image; carrying out the adjacent DNA coding on the fourth intermediate image to obtain a final ciphertext image.

Description

technical field [0001] The invention relates to an image encryption method and device based on pixel and DNA intersecting dynamic chaotic ciphers. Background technique [0002] In recent years, with the rapid development of computer technology and network technology, great changes have taken place in communication methods. Multimedia communication has gradually become an important means for people to exchange information. Due to the openness and sharing of the network, it poses a huge potential threat to multimedia communication. Therefore, the security and confidentiality of images are also becoming more and more important. The image has the characteristics of high correlation and redundancy between adjacent pixels, which makes traditional encryption methods (such as DES, IDEA, etc.) no longer universal. [0003] Given the limitations of traditional methods, chaos stands out as a new discipline. Chaos is a deterministic but unpredictable state of motion in nonlinear sci...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
Inventor 骆超
Owner SHANDONG ZHENGZHONG COMP NETWORK TECH CONSULTING
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