A secure communication scheme based on chaotic Duffing oscillators and frequency estimation for the transmission of binary-coded messages

作者：Zapateiro Mauricio^*; Vidal Yolanda; Acho Leonardo

来源：Communications in Nonlinear Science & Numerical Simulation, 2014, 19(4): 991-1003.

DOI：10.1016/j.cnsns.2013.07.029

• Chaos-based secure communication
• Frequency estimation
• Synchronization
• Lyapunov methods

This work presents a new technique to securely transmit and retrieve a message signal via chaotic systems. The main contribution of this paper is two-fold: the way that the message signal is encrypted in the frequency of a sinusoidal term and a novel frequency estimator for retrieving the message. In our system, a two-valued message signal modulates the frequency of the Duffing oscillator sinusoidal term. Then, two chaotic signals generated by the oscillator are encrypted with a Delta modulator and sent through a noisy channel. A Lyapunov- based observer is used in the receiver side to retrieve the sinusoidal term that contains the message and a novel frequency estimator is then used to retrieve the confidential message signal. The system was implemented in Matlab/Simulink in order to analyze its performance.

• 出版日期2014-4