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Combination function projection synchronization method in chaotic communication systems

A technology of chaotic communication and combination function, which is applied in the direction of secure communication through chaotic signals, transmission systems, digital transmission systems, etc., and can solve the problems of reduced system robustness and reliability, poor system confidentiality, and increased system overhead. , to reduce external interference, improve confidentiality, and accelerate synchronization.

Active Publication Date: 2019-01-04
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0003] In some combined synchronization systems that have been disclosed, the research mainly focuses on how to achieve synchronization, and the number of synchronization systems used in existing literature is only three or four, the number of systems is limited, and the security of confidential communication is still not up to the standard. to high level requirements
However, increasing the number of systems to provide higher security will reduce the robustness and reliability of the entire system, increase system overhead, and have no practical value.
In addition, the scaling factor of combined synchronization is mostly a real diagonal matrix, which does not change with time. Once it is leaked or analyzed, the confidentiality of the system will deteriorate

Method used

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  • Combination function projection synchronization method in chaotic communication systems
  • Combination function projection synchronization method in chaotic communication systems
  • Combination function projection synchronization method in chaotic communication systems

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Embodiment Construction

[0020] In order to make the purpose, 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, taking the triple combined synchronous chaotic system as an example.

[0021] The triple combination synchronous chaotic system consists of six drive systems and three response systems. The first set of drive systems looks like this:

[0022]

[0023]

[0024]

[0025] where x 1 (t)=[x 11 ,x 12 ,...,x 1n ] T , x 2 (t)=[x 21 ,x 22 ,...,x 2n ] T ,x 3 (t)=[x 31 ,x 32 ,...,x 3n ] T is the state vector, f 1 ,f 2 ,f 3 :R n →R n is a continuous function vector, Δf 1 (x 1 ,t)=[Δf 11 (x 1 ,t),Δf 12 (x 1 ,t),…,Δf 1n (x 1 ,t)] T , Δf 2 (x 2 ,t)=[Δf 21 (x 2 ,t),Δf 22 (x 2 ,t),…,Δf 2n (x 2 ,t)] T , Δf 3 (x 3 ,t)=[Δf 31 (x 3 ,t),Δf 32 (x 3 ,t),…,Δf 3n (x 3 ,t)] T is the external disturbance of the drive system (1)(2)(3).

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Abstract

The invention relates to a combination function projection synchronization method in chaotic communication systems. A concept of proportional function is introduced to change synchronization proportional factors in conventional multiple chaotic systems from specific numerical values to a proportional function. Combination function projection synchronization of the multiple chaotic systems is realized by designing a corresponding adaptive feedback controller. Therefore, higher security can be provided without adding more chaotic systems. In addition, the invention proposes to introduce a clocksynchronization module in a driving system and a response system after analyzing reasons that affect a projection synchronization speed of multiple combination functions, which reduces external disturbance of the chaotic systems caused by time factors, accelerates the synchronization of the chaotic systems, thereby enabling a combination mode of the multiple chaotic systems to be rapidly switchedaccording to time, and provides better security performance for the multiple chaotic systems under the premise of ensuring the robustness and reliability of a secure communication system.

Description

technical field [0001] The invention belongs to the field of secure communication, in particular to a combination function projection synchronization method in a chaotic communication system. Background technique [0002] With the development of computer technology, various secure communication deciphering schemes are also emerging. In most existing studies on chaotic synchronous secure communication, signals are sent by a chaotic system (drive system) and then received by a response system. However, the anti-interference and anti-deciphering performance of such a transmission process is not very high. Different from the synchronization of single-drive and single-response systems, combined synchronization uses multiple drive systems to drive a single or multiple response systems to achieve chaotic synchronization. The driving system performs signal transmission, thereby improving the safety and flexibility of chaotic secure communication. [0003] In some combined synchron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04J3/06
CPCH04J3/0638H04L9/001
Inventor 方洁刘娜方娜孙军伟吴青娥邓玮娄新杰朱飞许丹莹
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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