Multi-image encryption method based on DNA encoding and chaos

An encryption method and multi-image technology, applied in image communication, electrical components, etc., can solve problems such as weak security, low encryption efficiency, and decrypted image distortion, and achieve high security and good encryption effect

Active Publication Date: 2018-02-02
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] Purpose of the present invention: Aiming at the problems of low encryption efficiency, distortion of decrypted images or w

Method used

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  • Multi-image encryption method based on DNA encoding and chaos
  • Multi-image encryption method based on DNA encoding and chaos
  • Multi-image encryption method based on DNA encoding and chaos

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Embodiment Construction

[0054] Embodiments of the present invention will be further described in detail below in conjunction with specific drawings and examples.

[0055] Figure 6 It is an encryption flow chart of a multiple image encryption method based on DNA coding and chaos.

[0056] The programming software used is Matlab R2012a, select figure 2 The four gray images with a size of 512×512 are shown as original images. Using the multi-image encryption method based on DNA coding and chaos, the specific process of encrypting the original image is as follows.

[0057] 1. Select 4 interactive images I with a size of 512×512 1 , I 2 , I 3 , I 4 ,Such as Figure 7 As shown; combine 4 interactive images into one large image, such as Figure 8 As shown; use SHA-256 to calculate the hash value of the large image K=823e88b878982f85f05cd5a59bbd9b7ce484ad716cb2a43241bbfe958f56cf63 (hexadecimal representation); divide K into bit blocks according to each 8 bits (Bit); given the initial two-dimension...

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Abstract

The invention provides a multi-image encryption method based on DNA encoding and chaos, and belongs to the field of information encryption. For mass digital images generated in big data, not only doesthe security of image content need to be guaranteed, but also the high encryption efficiency is needed. Multi-image encryption has the high efficiency characteristic by serving as a novel multimediasecurity technology. Some existing multi-image encryption methods have the defects that the encryption efficiency and the security are low, and decrypted images are obviously distorted and unsatisfactory. According to the multi-image encryption method, multiple original images are encoded into a corresponding DNA sequence matrix. The DNA sequence matrix is scrambled by a chaotic sequence, and a DNA sequence diffusion operation is conducted on a scrambling result. Encrypted images are obtained through a DNA decoding operation. The multi-image encryption method based on DNA encoding and chaos isproposed to serve as the main innovation content. Experiment results show that the method has the excellent encryption effect and is high in security and suitable for practical image encryption application.

Description

technical field [0001] The invention relates to an information encryption technology, in particular to a multi-image encryption method. Background technique [0002] In many fields, massive digital images are generated every day, such as military detectives, natural disaster monitoring, traffic monitoring, weather forecasting, e-government, and personal affairs, etc. At the same time, in recent years, the emergence of a large number of various shooting equipment has also accelerated the arrival of the era of big data. For example: An ordinary SLR camera can capture 3 to 5 images per second, and a traffic camera can collect thousands of images per day. In the era of big data, digital images often carry a lot of secret information. With the rapid development of computers and the Internet, multimedia security, especially image security, has become one of the important challenges in academia and industry. [0003] In order to ensure the safe transmission of images, researcher...

Claims

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Application Information

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IPC IPC(8): H04N1/32
CPCH04N1/32149H04N1/32272
Inventor 张晓强孙鹤鹏
Owner CHINA UNIV OF MINING & TECH
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