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Secret communication method and system based on Chen chaotic system projection synchronization method

A chaotic system and secure communication technology, applied in synchronization devices, transmission systems, digital transmission systems, etc., can solve the problems of unsatisfactory Chen system, complex controller, ineffectiveness, etc., achieve low design difficulty, improve responsiveness, Good real-time effect

Pending Publication Date: 2022-07-12
QILU UNIV OF TECH
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Problems solved by technology

[0005] In 1999, Professor Chen Guanrong discovered the Chen chaotic system. Compared with the Lorenz system, the Chen system is not topologically equivalent and has more complex dynamic behavior, so it is widely used in the fields of image encryption, secure communication, etc. There are some problems in the Chen chaotic system: the Chen system is difficult to control it, many control methods are not ideal for the Chen system, or even have no effect, and the controller designed for the Chen system is also very complicated, so it is difficult to realize in practice high

Method used

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  • Secret communication method and system based on Chen chaotic system projection synchronization method
  • Secret communication method and system based on Chen chaotic system projection synchronization method
  • Secret communication method and system based on Chen chaotic system projection synchronization method

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Embodiment 1

[0076] The present embodiment discloses a secure communication method based on the Chen chaotic system projection synchronization method;

[0077] like figure 1 As shown, the secure communication method based on the Chen chaotic system projection synchronization method includes:

[0078] S101: Establish a mathematical model of the sender and the receiver, and set the initial value of the mathematical model;

[0079] Set the sending end as the initial value of the Chen chaotic system. The initial value specifically refers to: when using MATLAB / Simulink for numerical simulation, select the initial value of the sending end of the Chen chaotic system x(0)=[1,-2,4] .

[0080] Establish a mathematical model of the Chen chaotic system as the sender; specifically, it includes:

[0081]

[0082] in

[0083]

[0084]

[0085] where x∈R 3 Denoted as the drive signal of the system, f(x)∈R 3 is expressed as a continuous vector function, B is expressed as a constant matrix, u...

Embodiment 2

[0222] The present embodiment discloses a secure communication system based on the Chen chaotic system projection synchronization method;

[0223] like Figure 7 As shown, a secure communication system based on the Chen chaotic system projection synchronization method includes an initialization module, an error variable definition module, an error system building module, a controller building module and a secure communication module;

[0224] The initialization module is configured to: establish the mathematical model of the sender and the receiver, and set the initial value of the mathematical model;

[0225] The error variable definition module is configured to: according to the mathematical model, define the error variable of the projection synchronization between the transmitting end and the receiving end;

[0226] The error system building module is configured to: establish an error system composed of error variables and controllers that are projected in synchronization ...

Embodiment 3

[0232] The purpose of this embodiment is to provide a computer-readable storage medium.

[0233] A computer-readable storage medium on which a computer program is stored, and when the program is executed by the processor, implements the steps in the secure communication method based on the Chen chaotic system projection synchronization method described in Embodiment 1 of the present disclosure.

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Abstract

The invention provides a secure communication method and system based on a Chen chaotic system projection synchronization method, and the method comprises the steps: building mathematical models of a transmitting end and a receiving end, and setting the initial values of the mathematical models; according to the mathematical model, defining an error variable of projection synchronization of the sending end and the receiving end; establishing an error system consisting of an error variable for projection synchronization of the transmitting end and the receiving end and a controller; the uncertainty of an error system and the error of external disturbance are controlled to be converged to zero, and a projection synchronous controller is constructed; after the transmitting end and the receiving end finish projection synchronization under the action of the projection synchronization controller, the transmitting end and the receiving end start to execute secret communication; the control method provided by the invention is better in real-time performance and low in design difficulty, and the control capability of an error system is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of secure communication, in particular to a secure communication method and system based on a Chen chaotic system projection synchronization method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In 1999, scholars such as Mainieri and Rehacek proposed the concept of projection synchronization. Projection synchronization refers to the synchronization of the amplitudes of the master system and the slave system according to a fixed proportional relationship over time. Projection synchronization is applied to the secure communication of chaotic systems. The binary number can be extended to M-ary to achieve faster transmission, so it is deeply loved by researchers. The projection synchronization control method can be widely used in the biological field, neural field, Internet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L7/00
CPCH04L9/001H04L7/00
Inventor 李彬李艳萍郭荣伟刘丽霞陈现栋
Owner QILU UNIV OF TECH
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