Physical layer security in simultaneous wireless information and power transfer networks

In this paper, we investigate physical-layer security (PLS) design in simultaneous wireless information and power transfer (SWIPT) system, where the energy receivers (ERs) may eavesdrop the confidential information send to the desired receivers (DRs). Specifically, we proposed a joint design of the AN-aided transmission and the power allocation to maximize the secrecy rate at the destination, under the harvested energy constraint at the ERs. To solve the formulated nonconvex problem, we decouple the original problem to the dual problem and proposed an alternating optimization algorithm. Finally, the efficacy of the proposed designs is demonstrated through simulations.