Encrypted audio communication design using synchronized discrete-time hyperchaotic maps

In this paper, encrypted audio communications based on synchronization of two coupled discrete-time hyperchaotic systems in master-slave configuration is studied. A theoretical approach to nonlinear control design, based on aggregation techniques associated to one specific characteristic matrix description, namely, the arrow form, is developed. Numerical simulations are carried out to assess the performance of the proposed contribution in the important field of secure communication.