首页|A novel secure communication system using Dufng's chaotic model
A novel secure communication system using Dufng's chaotic model
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In this work the chaotic Dufng system was used in secure communications applications. The shift-keying scheme was used to modulate the diferent signals such as; OVEN and the sinusoidal signal. It has been proven that the chaotic carriers allow the process of modu- lating and demodulating signals easily and with high efciency, and this is coupled with the coupling factor between the receiving and transmittance units. Due to the absence of identical chaotic systems in time series behavior, it is assumed that there are two diferent chaotic systems in the initial conditions, one of which is called the transmitting unit and the second is called the receiving unit, which are as follows: xi1, yi1, xi2, yi2, where the two systems were coupling to an external stimulus called the coupling factor. The coupling factor k was changed from 0 to 100 a.u. to obtain full synchronization at this value for the sinusoidal signal and OVEN. In addition, there are limitations for the frequency and ampli- tude values of the sinusoidal signal on the signal transmission secret, and limitations for the input values for the OVEN signal. After experimenting with many values of the cou- pling factor, it was found that the two units have complete synchronization when the value of k=100. Where the error function becomes zero and falls within±0.001. It was observed that at amplitude and frequency A=0.1, f=0.01. the transmitted signal is clear and there is no secrecy in transmitting information, while at amplitude A=0.1, f=0.34 the signal is implicitly hidden within the chaos signal.
ChaosDufng SystemTime SeriesFFTSecure Communication
Maryan Mohamed Manhil、Raied K. Jamal
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College of Science,Physics Department,University of Baghdad,Baghdad,Iraq
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