Abstract This paper presents a novel approach to extract the periodic signals masked by a chaotic carrier. It verifies that the driven Duffing oscillator is immune to the chaotic carrier and sensitive to certain periodic signals. A preliminary detection scenario illustrates that the frequency and amplitude of the hidden sine wave signal can be extracted from the chaotic carrier by numerical simulation. The obtained results indicate that the hidden messages in chaotic secure communication can be eavesdropped utilizing Duffing oscillators.
Received: 01 October 2007
Revised: 17 December 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60577019 and
60777041) and the International Cooperation Project of Shanxi
Province, China.
Cite this article:
Wang Yun-Cai(王云才), Zhao Qing-Chun(赵清春), and Wang An-Bang(王安帮) Extraction of periodic signals in chaotic secure communication using Duffing oscillators 2008 Chin. Phys. B 17 2373
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