Secure Transmission for Energy-Harvesting Sensor Networks With a Buffer-Aided Sink Node

This article investigates secure transmission in an energy harvesting (EH) sensor network in the presence of noncolluding passive eavesdroppers, where the EH sensors communicate with a controller via a buffer-aided relay (sink node). Each sensor has a battery to accumulate the energy harvested from the radio-frequency (RF) signals transmitted by the relay, and purely relies on the harvested energy...