Method and system for image transmission based on finite time synchronization of memristive chaotic system

A chaotic system and finite time technology, applied in the field of informatics, can solve problems such as poor encryption effect and unpredictable time when state variables tend to balance points

Active Publication Date: 2020-11-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0003] In the past, the main research was on the asymptotic synchronicity of the chaotic system. Although the system has a good encryption effect, the time when the state variable of the error in the actual system tends to the equilibrium point is unpredictable, resulting in a poor encryption effect.

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  • Method and system for image transmission based on finite time synchronization of memristive chaotic system
  • Method and system for image transmission based on finite time synchronization of memristive chaotic system
  • Method and system for image transmission based on finite time synchronization of memristive chaotic system

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Embodiment Construction

[0074] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0075] Please refer to figure 1 , which is a flow chart of the image encryption transmission method based on the limited time synchronization of the memristive chaotic system proposed by the present invention, including three parts of encryption steps Sa, Sb and Sc, decryption steps S1, S2 and S3, and limited time synchronization step S3 . Among them, the encryption step Sa corresponds to the driver image processing submodule, Sb corresponds to the driver end chaotic sequence processing submodule, Sc corresponds to the encrypted image processing submodule; S1 corresponds to the response end chaotic sequence processing submodule, S2 corresponds to the response end image processing submodule, S3 corresponds to the decry...

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Abstract

The invention discloses an image transmission method and system based on a memristive chaotic system with limited time synchronization. Chaotic signals are used to encrypt and transmit images, and bitwise XOR logic operations are used to encrypt and decrypt images. At the same time, a limited time control strategy is adopted. Realize the finite time synchronization of the two memristive chaotic systems at the driver end and the response end, and use the discrete chaotic sequence obtained by synchronous sampling and encoding as the encryption sequence and decryption sequence, so that the image can be successfully completed without transmitting the key through the channel. Encryption and decryption; compared with the progressive synchronization strategy used in the memristive chaotic system in the past, the limited time synchronization strategy designed by the present invention has faster convergence speed and better anti-interference performance, avoiding the possibility of keys being intercepted in the channel risk.

Description

technical field [0001] The invention relates to the field of informatics, more specifically, to an image transmission method and system based on a memristive chaotic system for finite time synchronization. Background technique [0002] The first application of chaos system to secure communication was in the 1990s. After nearly 30 years of development and exploration, it has become a popular research topic in the field of information science. Due to its noise-like and aperiodic characteristics, chaotic signals can be easily identified as random noise signals, which has great practical significance for encrypted transmission. In addition, the chaotic signal is very sensitive to the initial value condition. Even if the information is intercepted, it is difficult to obtain the accurate trajectory of the system and decipher useful information. Not only that, the chaotic signal is generated by a deterministic nonlinear system, so the complexity of the signal is increased, and it ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/12H04L9/00
CPCH04L9/001H04L9/12
Inventor 王雷敏董天都
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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