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Method for generating variable parameter chaos signal and chaos secret communication system

A technology of chaotic signals and variable parameters, which is applied in the field of password generation and can solve problems such as difficulty in realizing high-dimensional chaotic mapping

Inactive Publication Date: 2009-03-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its complexity, high-dimensional chaotic maps make it difficult to implement

Method used

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  • Method for generating variable parameter chaos signal and chaos secret communication system
  • Method for generating variable parameter chaos signal and chaos secret communication system
  • Method for generating variable parameter chaos signal and chaos secret communication system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0069] This example is the process of generating a pseudo-random sequence using a chaotic signal with variable parameters. The specific steps are as follows:

[0070] (1) In this example, the chen chaotic system generates chaotic signals under the control of the control module; the chen chaotic system can be expressed as follows:

[0071] d dt x ( t ) = - a · x ( t ) + a · y ( t ) ...

example 2

[0083] This example is the process of encryption and decryption of both parties using variable parameter chaotic signals. The specific steps are as follows:

[0084] (1) The Chen chaotic system of both communication parties achieves synchronization through the pulse synchronization method;

[0085] The sender chen chaotic system can be expressed in the form of the following differential equation:

[0086] d dt x 1 ( t ) = - a · x 1 ( t ) + a ...

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Abstract

The invention discloses a method for generating a variable parameter chaotic signal, and a chaotic secure communication system. The method comprises the following steps: firstly, chaotic mapping is used to generate the chaotic signal; then a parameter set of the chaotic mapping is determined in advance, so as to process any pseudorandom signal, and enable the state of the pseudorandom signal and the elements of the parameter set to be in one-to-one correspondence; and a corresponding parameter is chosen to generate the variable parameter chaotic signal by chaotic mapping according to the state of the pseudorandom signal. The system comprises a chaotic signal generating module, an analog-to-digital conversion module, a parameter transformation module, a coding module, a multi-path choice switch, an encryption / decryption module, an encrypted message data cache, a plaintext data cache and a control module. The invention can increase the complexity of the output of the chaotic signal or a chaotic sequence, and effectively resist the analysis of the nonlinear prediction technology based on phase-space reconstruction. The output digital chaotic sequence can be taken as a pseudorandom number sequence or key stream to encrypt data; the output continuous chaotic signals can be used for designing a secret communication system based on chaos synchronization .

Description

technical field [0001] The invention relates to a password generating technology in the field of information security, more specifically, to a method for generating a variable parameter chaotic signal and a chaotic secure communication system. Background technique [0002] In recent years, chaos has begun to be applied in the field of secure communication. Chaos is an external complex manifestation caused by internal randomness in a deterministic system, and it is a seemingly random non-random motion. Due to the characteristics of ergodicity, broadband, noise-like, sensitivity to initial conditions, fast-decaying autocorrelation and weak cross-correlation, chaotic signals provide rich mechanisms and methods for realizing secure communication. [0003] The analysis methods of chaotic cipher or secure communication system mainly include: statistical analysis, spectrum analysis (including Fourier transform and wavelet transform, etc.) and chaotic time series analysis. The form...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04L9/22G06F17/10
Inventor 胡汉平程孟凡王祖喜朱子奇王炫聪
Owner HUAZHONG UNIV OF SCI & TECH
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