Multi-image encryption method based on dna coding and chaos
An encryption method and multi-image technology, which is applied in the direction of secure communication through chaotic signals, image communication, digital transmission system, etc., can solve the problems of weak security, low encryption efficiency, and distortion of decrypted images, and achieve high security and encryption effect Good results
Active Publication Date: 2020-01-14
CHINA UNIV OF MINING & TECH
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[0005] Purpose of the present invention: Aiming at the problems of low encryption efficiency, distortion of decrypted images or weak security in existing multi-image encryption methods, a multi-image encryption method based on DNA coding and chaos is proposed
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[0047] Embodiments of the present invention will be further described in detail below in conjunction with specific drawings and examples.
[0048] Figure 5 It is an encryption flow chart of a multiple image encryption method based on DNA coding and chaos.
[0049] The programming software used is Matlab R2012a, select Image 6 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.
[0050] 1. To generate the key, four interactive images of size 512×512 I 1 , I 2 , I 3 , I 4 Combining into one large image I b ; Use SHA-256 to calculate the hash value K of the large image; use formulas (1)-(5) to calculate the initial value x of the Piecewise Linear Chaotic Map (PWLCM) 0 =0.3643,y 0 =0.1126 and the control parameter p 1 =0.1439,p 2 =0.3235.
[0051] 2. Use the initial value x 0 and the control parameter p 1 , ...
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The invention discloses a multiple-image encryption method based on DNA coding and chaos, belonging to the field of information encryption. The massive digital image produced in the large data age should not only ensure the security of the image content, but also have high encryption efficiency. As a new multimedia security technology, the multiple-image encryption has the characteristic of high efficiency. A number of multiple-image encryption methods in the prior art have low encryption efficiency, weak security and obvious distortion in decrypted images, which are difficult to satisfy. Themultiple-image encryption method based on the DNA coding and the chaos comprises the following steps: encoding a number of original images into corresponding DNA sequence matrices; disordering the DNAsequence matrices by means of the chaos sequence; performing the DNA sequence diffusion operation on the disordered results; and obtaining the encrypted image by the DNA decoding operation. The maininnovation is that the invention provides a multiple-image encryption method based on the DNA coding and the chaos. The experimental results show that the method has excellent encryption effect and high security, and is suitable for the practical application of image encryption.
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...
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IPC IPC(8): H04N1/32H04L9/00
CPCH04L9/001H04N1/32149H04N1/32272
Inventor 张晓强王雪松
Owner CHINA UNIV OF MINING & TECH