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Image transmission method and system based on memristor chaotic system finite time synchronization

A chaotic system and limited time technology, applied in the field of informatics, can solve problems such as unpredictable time tending to the equilibrium point and poor encryption effect

Active Publication Date: 2019-03-01
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0003] In the past, the main research was on the asymptotic synchronization 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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  • Image transmission method and system based on memristor chaotic system finite time synchronization
  • Image transmission method and system based on memristor chaotic system finite time synchronization
  • Image transmission method and system based on memristor chaotic system finite time synchronization

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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 . The encryption step Sa corresponds to the image processing submodule of the driver, Sb corresponds to the chaotic sequence processing submodule of the driver, Sc corresponds to the encrypted image processing submodule; S1 corresponds to the chaotic sequence processing submodule of the response terminal, S2 corresponds to the image processing submodule of the response terminal, and S3...

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Abstract

The present invention discloses an image transmission method and system based on memristor chaotic system finite time synchronization, the method and system adopts chaotic signals to encrypt and transmit an image, uses bitwise OR logical calculation to encrypt and decrypt the image, in the same time, through a finite time control strategy, releases finite time synchronization of two memristor chaotic systems of a driving terminal and a response terminal, and uses a discrete chaotic sequence obtained by synchronous sampling and coding as an encryption sequence and a decryption sequence to successfully complete the encryption and decryption of the image without transmitting a key through a channel. Compared with a progressive synchronization strategy applied in the memristor chaotic system in the past, the finite time synchronization strategy has a faster convergence speed and better anti-interference performance, thereby avoiding a risk of the key being intercepted in the channel.

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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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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