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Research on Multi-Dimensional Chaotic Secure Communication System

Author: ZhaoHongChao
Tutor: ZhuJianLiang
School: Harbin University of Science and Technology
Course: Theory and New
Keywords: Multidimensional Chaotic Chaotic Encryption Communication system
CLC: TN918
Type: Master's thesis
Year: 2010
Downloads: 79
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Abstract


In today's digital information resources has become an important part of people's lives , information security also will become a hot research topic. Chaos exists in the objective world , the understanding of chaotic phenomena are nonlinear science is one of the most important achievements , chaotic signal has the sensitivity to initial conditions , non-periodic , and broadband power spectral class of stochastic characteristics very beneficial secure communication applications . The study of chaos , will have a very important theoretical significance and practical value . This paper describes the chaos and the emergence and development of secure communications , and from the perspective of the system described chaotic dynamics of chaos concepts, definitions and methods of chaos research content. Analyzed and summarized in several classic three-dimensional chaotic model , based on the three-dimensional autonomous chaotic system has been improved , at the same time the circuit implementation. In order to produce a more complex chaotic behavior in three-dimensional chaotic based on a more in-depth study by numerical simulation for each parameter adjustment , has improved the four-dimensional chaotic system and the corresponding implementation of the circuit , first proposed five dimensional chaotic system and circuit simulation done entirely consistent with the numerical simulation , the confidentiality of communications to provide a new source of chaos . Chaotic synchronization is a prerequisite for communication , synchronization based on several common approach to the Lorenz system and three-dimensional autonomous chaotic system simulation experiment to achieve chaos synchronization. Analysis of chaotic secure communication systems and several common chaotic secure communication, from the theoretical analysis and numerical simulation aspects , discussed the problem of chaotic secure communication system , a three-dimensional autonomous chaotic system and the five -dimensional chaotic system drive - response illustrates the chaotic synchronization the basic principle of secret communication , communication for a chaotic simulated , the simulation results show that the two systems to achieve complete synchronization , and can complete decryption. Finally, the chaotic sequence encrypted digital information in the field of doing some work . Presents a three-dimensional autonomous chaotic system based on the image and text encryption and decryption algorithm encryption and decryption algorithms. Chaotic system to produce real-valued chaotic sequence , after a series of pre- constructed encrypted , complete chaos in the field of digital information encrypted in some applications.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security
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