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Digital image encryption method based on spatiotemporal chaotic system and semi-tensor product compressed sensing

A technology of spatiotemporal chaos and semi-tensor product, which can be used in secure communication through chaotic signals, transmission systems, image communication, etc. Overhead and time overhead of encryption, enlarging the key space of encryption, the effect of resisting brute force attack methods

Pending Publication Date: 2022-03-08
SOUTHEAST UNIV
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Problems solved by technology

These low-dimensional chaotic systems have defects such as short periodicity and small key space.
In particular, in the case of limited computer precision, the randomness of the low-dimensional chaotic system is reduced, so that the key of the encryption algorithm has the risk of being exposed
On the other hand, when combining the "scrambling-diffusion" encryption structure with compressed sensing, some literatures have problems with unreasonable encryption structures and invalid encryption methods, which reduce the security of encryption algorithms

Method used

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  • Digital image encryption method based on spatiotemporal chaotic system and semi-tensor product compressed sensing
  • Digital image encryption method based on spatiotemporal chaotic system and semi-tensor product compressed sensing
  • Digital image encryption method based on spatiotemporal chaotic system and semi-tensor product compressed sensing

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Embodiment Construction

[0055] Such as figure 1 As shown, a digital image encryption method based on spatiotemporal chaotic system and semi-tensor product compressive sensing includes the following steps:

[0056] (1) Key generation: use all the pixel values ​​of the input plaintext image as the input of the hash function SHA384, and generate a 384-bit image hash value, which is used to generate the scrambling in step (2) and step (3) The initial value of the space-time chaotic system;

[0057] (2) Scrambling process: After performing discrete wavelet transform on the input plaintext image, use the Arnold scrambling method to homogenize the number of non-zero elements in each column of the wavelet coefficient matrix to obtain a scrambled wavelet coefficient matrix, where Arnold scrambling The parameters of are determined by the image hash value of step (1);

[0058] and As the control key of step (5) diffusion process;

[0059] (4) Semi-tensor product compression sensing encryption: use the chaot...

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Abstract

The invention discloses a digital image encryption method based on a spatiotemporal chaotic system and semi-tensor product compressed sensing. The digital image encryption method comprises the following steps: (1) generating a key; (2) a scrambling process; (3) iteration of the spatiotemporal chaotic system; (4) performing semi-tensor product compressed sensing encryption; (5) diffusion process; and (6) a decryption process. According to the invention, the data volume of the digital image can be reduced, and the encryption security and the encryption efficiency are improved.

Description

technical field [0001] The invention relates to the technical fields of signal processing and information security, in particular to a digital image encryption method based on space-time chaotic system and semi-tensor product compressed sensing. Background technique [0002] Due to the rapid development of network technology and communication technology, the speed of information dissemination is faster and the scope of dissemination is wider. A larger number of netizens in our country are using the Internet to share and transmit information. At the same time, multimedia technology also makes the form of information transmission more abundant, from text to digital image, audio, video and other diversified forms. Among them, images, as one of the main sources for human beings to obtain information, are widely used in the fields of the Internet of Things, medical care, and aerospace. However, the shared and open nature of the Internet also brings great potential dangers. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32H04L9/08H04L9/00
CPCH04N1/32272H04L9/001H04L9/0869Y02D30/50
Inventor 卢剑权刘洋游晓庆
Owner SOUTHEAST UNIV
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