Extraction of periodic signals in chaotic secure communication using Duffing oscillators

This paper presents a novel approach to extract the periodic signalsmasked by a chaotic carrier. It verifies that the driven Duffingoscillator is immune to the chaotic carrier and sensitive to certainperiodic signals. A preliminary detection scenario illustrates thatthe frequency and amplitude of the hidden sine wave signal can beextracted from the chaotic carrier by numerical simulation. Theobtained results indicate that the hidden messages in chaotic securecommunication can be eavesdropped utilizing Duffing oscillators.