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Multi-image encryption method and decryption method based on light field principle and chaotic system

A chaotic system and encryption method technology, which is applied in the field of multi-image encryption method and decryption to achieve the effects of improving key sensitivity, fast and efficient encryption, and expanding key space.

Pending Publication Date: 2020-05-19
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

Although it is mentioned in this method that it can be combined with the method of chaotic encryption, the two methods are still relatively independent in use. The method of light field is used to realize the first encryption and then the method of chaos is used for the second encryption.

Method used

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  • Multi-image encryption method and decryption method based on light field principle and chaotic system
  • Multi-image encryption method and decryption method based on light field principle and chaotic system
  • Multi-image encryption method and decryption method based on light field principle and chaotic system

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0038] Such as figure 1 As shown, the encryption process is as follows:

[0039] Step 1: Combine multiple images to be encrypted into one image in any order, such as image 3 As shown, wherein, the number of images to be encrypted is A×A (without loss of generality, A×A=3×3 is selected in the embodiment), and the number of pixels of a single image is B×B (without loss of generality, the implementation In the example, select B×B=150×150), the total number of pixels of the spliced ​​combined image is: A×A×B×B=450×450.

[0040] Step 2: The number and parameters of the light field imaging system for encryption are generated by the chaotic system.

[0041] Randomly choose the initial value Parameter variable μ 1 ∈(3.5699456,4), iteration n 1 (n 1 is any positive integer) times to get the c...

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Abstract

The invention provides a multi-image encryption method and decryption method based on a light field principle and a chaotic system, and based on the light field principle and the chaotic system, the method randomly generates the number and system parameters of light field imaging systems through the chaotic system, and constructs a plurality of corresponding light field imaging systems in a computer for encryption. And the problem of hardware limitation in a pure optical mode can be avoided by adopting a computational imaging mode. Due to the addition of the chaotic system, compared with otherproposed image encryption methods based on the light field principle, the method has the advantages that the key space is further expanded, the key sensitivity is further improved, the complexity improvement of the encryption method is limited, and the encryption and decryption speeds are not obviously reduced. And meanwhile, the common problems of system complexity, hardware limitation, decrypted image distortion and the like in common optical encryption are avoided. The method can achieve the quick and efficient encryption of a plurality of images, and is wide in application prospect in thefield where a large number of images need to be transmitted safely.

Description

technical field [0001] The invention relates to image information encryption technology, in particular to a multi-image encryption method and decryption method based on light field principle and chaotic system. Background technique [0002] With the continuous development of Internet technology and information technology, multimedia data such as audio, pictures, video, etc. are more and more widely used, and as a kind of network information transmission resource, with its universality, shareability, processability and multi-utility Sex has become an indispensable part of all walks of life including politics, economy, military affairs, education and so on. [0003] Among them, image encryption technology is the core technology in multimedia information security, while the calculation object of traditional data encryption algorithm is mainly text data or binary data, and the calculation complexity is usually high. Therefore, the traditional data encryption algorithm cannot me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60H04L9/00
CPCG06F21/602H04L9/001G06F2221/2107
Inventor 张薇张翔韩思敏周德峰张朝财
Owner UNIV OF SHANGHAI FOR SCI & TECH
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