Logistic chaotic mapping-based digital image encryption method

A technology of digital image and encryption method, which is applied in the direction of image data processing, image data processing, instruments, etc., and can solve the problem of low encryption efficiency
CN106530207AInactive Publication Date: 2017-03-22NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2017-03-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The present invention discloses a logistic chaotic mapping-based digital image encryption method. Each pixel value of a gray-scale image is represented in the form of eight-bit binary numbers, so that the two-dimensional gray-scale image is converted into a one-dimensional code digital string of 0 and 1 for further treatment. According to given initial values, a chaotic sequence is generated based on the logistic mapping method. The chaotic sequence is then sorted, so that a position index is obtained. According to the position index, the original image is subjected to bit-level scrambling operation. In this way, an image encryption result, which integrates pixel fusion and pixel scrambling as a hole, is obtained.
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Description

technical field

[0001] The invention belongs to the field of digital image encryption, and relates to a digital image encryption method based on Logistic chaotic mapping. Background technique

[0002] The rapid development of the information age has made information transmission more rapid and convenient. Digital image information is widely used in daily data communication because of its characteristic of visual and intuitive transmission of information. Therefore, the security issues of digital images in the process of transmission are more worthy of our attention.

[0003] Due to the large amount of digital image data, serious redundancy, and the two-dimensional space distribution of the data storage structure, the encryption efficiency of the traditional encryption method is very low, and a new encryption method suitable for digital images is needed to improve the encryption efficiency. Based on the many commonalities between chaotic maps and encryption systems, for exam...

Claims

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