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

Abstract

Radio-frequency (RF) energy harvesting (EH) in wireless relaying networks has attracted considerable recent interest, especially for supplying energy to relay nodes in Internetof-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 halfduplex (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 non-trivial trade-off between reliability and security of the proposed system. In addition, we conclude from the simulation results that the proposed DPSR scheme outperforms the SPSRbased scheme in terms of OP and IP under the influences of different parameters on system performance.

Covert communication in power Internet of Things

“…The intelligent network physical system that detects physical network security threats through behavioural power analysis has been addressed in [11]. Nguyen et al [12] have analysed the security and reliability of IoT networks based on coexisting wireless information and power transfer amid friendly interference. Li et al [13] have investigated the PLS of wireless power transfer cooperative multi-relay in the IoT network with multiple eavesdroppers (Eve), which suffer from channel estimation error and in-phase and quadrature-phase imbalance.…”

Research on physical layer security based on cooperative interference

“…Lastly, it offers adaptability in signal design and resource allocation, ensuring flexibility in adjusting security levels. Given the aforementioned benefits, physical layer security (PLS) emerges as a potentially viable solution for Internet of Things (IoT) networks 2 .…”

Enabling Secure UAV-Assisted IoT Communications with RF Energy Harvesting in the Presence of Eavesdropper

“…They proposed a UAV serving a mobile user while jamming the eavesdropper. Focusing on the security-reliability tradeoff (SRT) in a SWIPT-based relay network, the authors in [15] introduced a friendly jammer to enhance security against eavesdroppers.…”