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System and method for generating analog-digital mixed chaos signals

A chaotic system and modulus mixing technology, applied in the field of password generation, can solve the problems of continuous chaotic systems that are difficult to work stably and synchronously for a long time, and feature degradation

Inactive Publication Date: 2012-01-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the present invention solves the problem that the existing digital chaotic system is easy to cause characteristic degradation due to the finite word length effect, and the existing continuous chaotic system is difficult to work stably and synchronously for a long time and needs to transmit the synchronization signal through the channel

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  • System and method for generating analog-digital mixed chaos signals
  • System and method for generating analog-digital mixed chaos signals
  • System and method for generating analog-digital mixed chaos signals

Examples

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example 1

[0136] In this example, the Lorenz chaotic system is used to design the modulus hybrid chaotic system. The operation precision of the digital chaotic system is 19 bits, of which 7 bits are used to represent the integer part of the variable value in the digital chaotic system, 11 bits are used to represent the fractional part of the variable value in the digital chaotic system, and the remaining 1 bit is used for A symbol representing the value of a variable in a digital chaotic system.

[0137] Let digital Lorenz chaotic systems 1.1 and 2.1 be:

[0138] x j ( i + 1 ) = ( 1 - τ · ...

example 2

[0156] In this example, the Chen chaotic system is used to design the modulus hybrid chaotic system. The operation precision of the digital chaotic system is 19 bits, of which 7 bits are used to represent the integer part of the variable value in the digital chaotic system, 11 bits are used to represent the fractional part of the variable value in the digital chaotic system, and the remaining 1 bit is used for A symbol representing the value of a variable in a digital chaotic system.

[0157] Let the digital Chen chaotic system 1.1 and 2.1 be:

[0158] x j ( i + 1 ) = ( 1 - τ · ...

example 3

[0180] In this example, one-dimensional Logistic chaotic system and Chen chaotic system are used as digital chaotic system and continuous chaotic system to design modulus hybrid chaotic system. The operation precision of the digital chaotic system is 19 bits, of which 18 bits are used to represent the fractional part of the variable value in the digital chaotic system, and the remaining 1 bit is used to represent the sign of the variable value in the digital chaotic system. Although the sending and receiving parties have agreed on the time required for one iteration of the digital chaotic system 1.1 and 2.1, due to the influence of factors such as noise and temperature, the actual operation time of the digital chaotic system 1.1 and 2.1 will be slightly different. For this reason, in this example, the control modules 1.4 and 2.4 in the modular hybrid chaotic systems 1 and 2 are used to control the respective local digital chaotic systems and continuous chaotic systems, so that ...

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Abstract

This invention discloses a system and a method for generating A / D blend chaos signals, in which, digital chaos systems separated in different places control the continuous chaos systems of their local places, so that the systems separated in different places can work synchronously for a long time without needing to transmit synchronous drive signals, the continuous chaos systems disturb the digital chaos systems at their local places to prevent them from degenerating their characters, besides, the digital chaos sequence output by the blend chaos system can be taken as the false random numbersequence or a cryptographic key flow to cipher data and the output signals can be used in designing security communication system based on chaos synchronization.

Description

technical field [0001] The invention relates to a password generation technology in the field of information security, and more specifically, to a system and method for generating a modulus-digital mixed chaotic signal. Background technique [0002] With the development of computer, communication, and network technology, the pace of global informatization is getting faster and faster. Network information system has become the infrastructure for a country, an industry, a group, and an enterprise to seek development. The communication confidentiality of the network information system has become an important issue that hinders the sustainable and stable development of the economy and threatens national security. [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00
CPCH04L9/001H04L9/12H04K1/025
Inventor 胡汉平王祖喜吴晓刚周麟朱子奇位继伟杨杰卢鹏宇郑志彬
Owner HUAZHONG UNIV OF SCI & TECH
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