Security-Reliability Tradeoff Analysis for SWIPT- and AF-Based IoT Networks With Friendly Jammers

• Published in: IEEE internet of things journal 2022-11, Vol.9 (21), p.21662-21675
• Main Authors: Nguyen, Tan N., Tran, Dinh-Hieu, Chien, Trinh Van, Phan, Van-Duc, Voznak, Miroslav, Tin, Phu Tran, Chatzinotas, Symeon, Ng, Derrick Wing Kwan, Poor, H. Vincent
• Format: Article
• Language: English
• Subjects: Amplify and forward (AF); Communication system security; Cryptography; Cybersecurity; dynamic power splitting (PS); Energy harvesting; Information transfer; intercept probability (IP); Internet of Things; IP (Internet Protocol); IP networks; Jammers; Jamming; Network reliability; outage probability (OP); Power transfer; Radio frequency; Relaying; Reliability; Reliability analysis; Security; simultaneous wireless information and power transfer (SWIPT); source selection; Splitting; Tradeoffs; Wireless communication; Wireless networks; Wiretapping
• ISSN: 2327-4662; 2327-4662
• DOI: 10.1109/JIOT.2022.3182755

Radio-frequency (RF) energy harvesting (EH) in wireless relaying networks has attracted considerable recent interest, especially for supplying energy to relay nodes in the Internet of Things (IoT) systems to assist the information exchange between a source and a destination. Moreover, limited hardware, computational resources, and energy availability of IoT devices have raised various security challenges. To this end, physical-layer security (PLS) has been proposed as an effective alternative to cryptographic methods for providing information security. In this study, we propose a PLS approach for simultaneous wireless information and power transfer (SWIPT)-based half-duplex (HD) amplify-and-forward (AF) relaying systems in the presence of an eavesdropper. Furthermore, we take into account both static power splitting relaying (SPSR) and dynamic power splitting relaying (DPSR) to thoroughly investigate the benefits of each one. To further enhance secure communication, we consider multiple friendly jammers to help prevent wiretapping attacks from the eavesdropper. More specifically, we provide a reliability and security analysis by deriving closed-form expressions of outage probability (OP) and intercept probability (IP), respectively, for both the SPSR and DPSR schemes. Then, simulations are also performed to validate our analysis and the effectiveness of the proposed schemes. Specifically, numerical results illustrate the nontrivial tradeoff between reliability and security of the proposed system. In addition, we conclude from the simulation results that the proposed DPSR scheme outperforms the SPSR-based scheme in terms of OP and IP under the influences of different parameters on system performance.