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IEEE/CIC International Conference on Communications in China (ICCC)

Secure Communication with a SWIPT-based Energy Harvesting Eavesdropper

Qun Li, Ding Xu

Published Aug 1, 2019• 1 citation
Publisher

Abstract

This paper investigates physical layer security of a multicarrier network with a legitimate source node, a legitimate destination node and an eavesdropper. Specifically, the eaves-dropper adopts the simultaneous wireless information and power transfer (SWIPT) by splitting the power of the received signals from the source node into two parts, one for energy harvesting and the remaining for information decoding, and a minimum harvested energy at the eavesdropper is required. We formulate a Stackelberg game, where the eavesdropper acts as a follower who aims to maximize its sum eavesdropping rate under the minimum harvested energy constraint, and the source node acts as a leader who aims to maximize its sum secrecy rate under the transmit power constraint. An algorithm is proposed to achieve the Stackelberg equilibrium. Simulation results are provided to verify the proposed algorithm. It is shown that the proposed algorithm greatly outperforms the benchmark algorithms.

DOI
10.1109/iccchina.2019.8855842

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This paper investigates physical layer security of a multicarrier network with a legitimate source node, a legitimate destination node and an eavesdropper. Specifically, the eaves-dropper adopts the simultaneous wireless information and power transfer (SWIPT) by splitting the power of the received signals from the source node into two parts, one for energy harvesting and the remaining for information decoding, and a minimum harvested energy at the eavesdropper is required. We formulate a Stackelberg game, where the eavesdropper acts as a follower who aims to maximize its sum eavesdropping rate under the minimum harvested energy constraint, and the source node acts as a leader who aims to maximize its sum secrecy rate under the transmit power constraint. An algorithm is proposed to achieve the Stackelberg equilibrium. Simulation results are provided to verify the proposed algorithm. It is shown that the proposed algorithm greatly outperforms the benchmark algorithms.
This paper investigates physical layer secure communication of a three node multicarrier network with a legitimate transmitter, a legitimate receiver, and a wireless powered full-duplex eavesdropper, where the eavesdropper splits the received signal power into two parts, one for energy harvesting and the remaining for information decoding. The eavesdropper sends jamming signals to interfere with the legitimate communication using the harvested energy to degrade the secure communication of the legitimate user. We use the non-cooperative game to model the interaction between the legitimate user and the eavesdropper, where the aim of the legitimate user is to maximize its sum secrecy rate on all subcarriers under the total transmit power constraint and the aim of the eavesdropper is to minimize the sum secrecy rate of the legitimate communication on all subcarriers under the energy causality constraint. We propose an iterative algorithm to achieve the Nash equilibrium of the non-cooperative game. Simulation results verify the proposed algorithm and show that the proposed algorithm significantly outperforms the benchmark algorithms and is resistant to the jamming from the eavesdropper.
This paper investigates secure communication in a two-hop relaying system based on physical layer security. The relay employs time-switching simultaneous wireless information and power transfer (SWIPT) to harvest energy and receive information from the source, and then transmits the source’s information and its own information to the destination. A passive eavesdropper exists and wiretaps information transmission over both hops. Under the general system configuration, we first provide performance modeling to reveal the secrecy rate of source and relay as well as identify their utilities. Then, we analyze the hierarchical competition behaviors between the source and relay from a game-theoretic perspective. In particular, we develop a Stackelberg game-based analytical framework to determine the optimal strategies for the source and relay by deriving the Stackelberg equilibrium. Furthermore, we summarize the feasible conditions of utilizing SWIPT-enabled relaying for secure communication and propose the end-to-end transmission scheme accordingly. Extensive numerical results are presented to demonstrate the performance of the proposed SWIPT-enabled relaying system.
In this paper, we investigate physical layer security, where a source node communicates with a wireless powered full-duplex destination node using multiple subcarriers in the presence of an eavesdropper. The destination node adopts the time switching technique to coordinate information decoding and energy harvesting, and can use the harvested energy to send jamming signals to interfere with the eavesdropper. We investigate the problem of optimizing transmit power allocation at the source node, the transmit power allocation for jamming at the destination node and the time allocation for maximizing the secrecy rate, and propose an iterative algorithm to solve the optimization problem. It is shown by simulation results that the proposed algorithm greatly outperforms other reference algorithms.
We consider a three-node multicarrier network consisting of a source node, a wireless powered full-duplex destination node, and an eavesdropper. The destination node is assumed to adopt the power splitting technique to coordinate information decoding and energy harvesting. To improve security performance, the destination node can send jamming signals using the harvested energy. The problem for maximizing the secrecy rate by optimizing transmit power allocation at the source node, the transmit power allocation for jamming at the destination node and the power splitting ratio at the destination node is investigated and solved by a proposed iterative algorithm. Simulation results show that the proposed algorithm outperforms other reference algorithms.
In the simultaneous wireless information and power transfer (SWIPT) system, the security becomes a major concern. This is because the energy harvesting (EH) operates with much higher received power than conventional information decoding (ID), which leads the environment vulnerable to eavesdropping. In this work, we propose a joint transceiver design to maximize physical-layer security while guaranteeing the required minimum of the harvested energy. The system under consideration consists of a transmitter (Tx), a receiver (Rx), a cooperative jammer (CJ) and a passive eavesdropper (Eve). The Rx is assumed to be energy-constrained in terms of the operation time or the limited power of a battery, where an EH Rx and an ID Rx are co-located. Based on an employment of the CJ, we jointly optimize the beam-forming vector for the CJ and the limited-resource allocation for the Rx to achieve the system objective. For the structure of the co-located EH and ID Rx, two schemes are investigated such as time switching (TS) and power splitting (PS) whose limited resources are the operation time and power, respectively. The algorithmic solutions are proposed for both TS and PS schemes based on rank-relaxation and Minorization-Maximization (MM) approach. Finally, the numerical results show that the secrecy rate in the SWIPT system can be improved by using the proposed algorithm while guaranteeing the requirement of the harvested energy.
In this paper, we consider a multi-node-assisted two-hop cooperative network, where an energy constrained source (S) aims to establish secure communications with a legitimate user in the presence of an eavesdropper. The cooperative nodes simultaneously assist the transmission from base station to legitimate user. Each cooperative node applies power splitting protocol to coordinate the received signal energy for information decoding and energy harvesting. The power splitting ratios at multi-node are formulated based on decode-and-forward (DF) relaying protocols. Depending on the available channel state information (CSI) at the source, we propose two different jamming schemes for secrecy performance enhancement. An optimal node is selected as a jammer to interfere the eavesdropper or a relay to forward the information to legitimate user. we evaluate the network performance based on secrecy outage probability (SOP). In addition, simple and accurate approximations are obtained at different transmission speed thresholds. Furthermore, numerical results reveal that there exist unique splitting ratios and harvesting efficiency that minimize the SOP.