Multiple chaotic attractor time-sharing switching method and device for communication encryption

A chaotic attractor and chaotic technology, which is applied in secure communication devices, digital transmission systems, electrical components, etc., can solve problems such as the inability to realize fast time-sharing switching of chaotic system attractors.

Inactive Publication Date: 2014-03-26
HARBIN UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] In order to solve the problem that the existing multi-chaotic attractor switching software system cannot realize fast time-sharing switching of different chaotic system attractors, the present invention further provides a multi-chaotic attractor time-sharing switching method and switching method for communication encryption device

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  • Multiple chaotic attractor time-sharing switching method and device for communication encryption
  • Multiple chaotic attractor time-sharing switching method and device for communication encryption
  • Multiple chaotic attractor time-sharing switching method and device for communication encryption

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Embodiment Construction

[0053] like Figure 1-15 As shown, this embodiment provides the implementation process of time-sharing switching of multiple chaotic attractors used for communication encryption to obtain chaotic signals as follows:

[0054] 1. Chaotic mathematical model and discretization

[0055] In order to construct the chaotic system with FPGA, the continuous differential equations of the chaotic system are transformed into discrete differential equations by fast digital difference algorithm. Using the fast Euler algorithm, the continuous chaotic equation is discretized with the discretization formula (1), and the differential equations are transformed into difference equations:

[0056] dx dt = x ( n + 1 ) - x ( n ) ...

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Abstract

The invention relates to a multiple chaotic attractor time-sharing switching method and device for communication encryption, belongs to the technical field of communication encryption and solves the problem that the existing multiple chaotic attractor switching software system is unavailable for fast time-sharing switching of different chaotic system attractors. A switching chaotic system is built in an FPGA; subsystem control characters are entered to a single-chip microcomputer through a soft keyboard; the single-chip microcomputer converts the subsystem control characters into subsystem switching control signals which are transmitted to the FPGA; the FPGA selects one subsystem of the switching chaotic system according to the subsystem switching control signals; split-phase control characters are entered to the single-chip microcomputer through the soft keyboard; the single-chip microcomputer converts the split-phase control characters into split-phase switching control signals which are transmitted to the FPGA; the FPGA selects two of three phases or four phases of the selected subsystem for outputting, according to the split-phase switching control signals. Time-varying, diverse and complex chaotic signals are provided. Encryption effect and decryption resistance are improved, and multiple chaotic attractors can be subjected to fast time-sharing switching anytime.

Description

technical field [0001] The invention relates to a multi-chaotic attractor time-sharing switching method and switching device for communication encryption, belonging to the technical field of communication encryption. Background technique [0002] As a complex nonlinear phenomenon, chaos has received great attention in the fields of science and engineering applications in the past few decades. At present, relevant literature at home and abroad have reported many analog circuits ([1], Liu Yangzheng, Jiang Changsheng. Construction and characteristic analysis of associated switchable hyperchaotic systems [J]. Acta Physica Sinica, 2009, 58(2): 771- 778; [2], Sun Youlin, Wu Junjie, Chen Jun. Design and Simulation of Automatic Switching Circuits for Two Hyperchaotic Systems [J]. Modern Electronic Technology, 2011, 34(22): 191-193+198; [3] , Zhao Li, Tang Wen. Simulation of Dynamos chaotic system based on Simulink [J]. Modern Electronic Technology, 2012, 35(4): 7-8+12) or digital c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00
Inventor 康守强王玉静杨广学张建广朱建良宋立新
Owner HARBIN UNIV OF SCI & TECH
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