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Digital image encryption method, decryption method and system based on chaotic system

A digital image and chaotic system technology, applied in the direction of secure communication, transmission system, and digital transmission system through chaotic signals, can solve the problems of encryption algorithm operation efficiency and limited practicality, so as to improve encryption security and encryption performance , the effect of high complexity

Pending Publication Date: 2022-03-08
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

These additional processing will have a great impact on the operating efficiency of the entire encryption algorithm, thus greatly limiting its practicability

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  • Digital image encryption method, decryption method and system based on chaotic system
  • Digital image encryption method, decryption method and system based on chaotic system
  • Digital image encryption method, decryption method and system based on chaotic system

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Embodiment Construction

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0051] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0052] figure 1 It is a flowchart of a digital image encryption method based on a chaotic system provided by an embodiment of the present invention. refer to fi...

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Abstract

The invention discloses a digital image encryption method, decryption method and system based on a chaotic system, and belongs to the field of chaotic image encryption, and the encryption method comprises the steps: taking a one-dimensional chaotic mapping as a seed mapping, introducing a multiplication operator and a modular operator, constructing a strong dynamic chaotic mapping, initializing a control parameter of strong dynamic chaotic mapping by using the hash value of the digital image to be encrypted and the encryption key; iterating the strong dynamic chaotic mapping for multiple times, extracting bits with a preset length from a chaotic state value obtained by each iteration to form a corresponding pseudo-random sequence, and diffusing image pixels of the digital image to be encrypted by using the pseudo-random sequence; and performing multiple iterations on the strong dynamic chaotic mapping again, converting a chaotic state value obtained by each iteration into an integer value in a set interval until a set number of different integer values are obtained, and performing scrambling operation on image pixels after diffusion processing to obtain a final encrypted image. And the digital image is encrypted safely and effectively.

Description

technical field [0001] The invention belongs to the field of chaotic image encryption, and more specifically relates to a digital image encryption method, decryption method and system based on a chaotic system. Background technique [0002] With the rapid development of information technology, the Internet has produced a large number of digital images, and spread them all over the world through various networks. Many digital images involve private or secret information that can cause serious damage if used maliciously. Therefore, before storing and transmitting image data, it should be protected. Among them, image encryption is the most direct and effective solution. However, due to the characteristics of data redundancy and high pixel correlation of digital images, traditional text information encryption technology cannot handle digital images well. Therefore, various theories have entered the field of vision of researchers. Chaos theory has received widespread attention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L9/40
CPCH04L9/001H04L63/0428
Inventor 朱虹张智强谢美意
Owner HUAZHONG UNIV OF SCI & TECH
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