Chaos-based communication systems by applying Hamiltonian synchronization

In this paper, two chaos-based communication schemes to transmit encrypted information are presented. We use Generalized Hamiltonian forms approach to synchronize two unidirectionally coupled n-scrolls chaotic attractors. First, a scheme is set-up to transmit binary signals by applying chaotic switching technique. Both coupling signal and confidential message are send by only one transmission channel. Additionally, a second scheme is also proposed to encrypted analog signals by using chaotic additive masking, which uses two transmission channels. Finally, theoretical results are confirmed by SPICE simulations to show the usefulness of the proposed communication schemes.