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This paper considers wireless-powered cooperative jamming (CJ) to securecommunication between a transmitter (Tx) and an information receiver (IR), inthe presence of an energy receiver (ER) which is termed as a potentialeavesdropper. The full-duplex jammer harvests energy from the Tx's informationsignal and transmits jamming signal at the same time, where the jamming signalnot only confounds the ER (potential eavesdropper) but also charges the ER. Ourgoal is to maximize the secrecy information rate by jointly optimizing thepower allocation at the Tx and jammer while maintaining the harvested energyrequirement of the ER. The studied problem is non-convex and we propose theoptimal solution based on the Lagrange method. Simulation results show that theproposed scheme significantly outperforms the benchmark schemes.

Power Allocation for Secure SWIPT Systems with Wireless-Powered Cooperative Jamming