Physical layer security for wirelessly powered communication systems

2017 ◽  
pp. 199-225
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Physical Layer

scholarly journals Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1439
Author(s):  
Janghyuk Youn ◽  
Woong Son ◽  
Bang Chul Jung
Keyword(s):  
Wireless Communication ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Low Cost ◽  
Physical Layer ◽  
Base Station ◽  
Wireless Communication Systems ◽  
Secrecy Rate ◽  
Pilot Signal ◽  
Time Division

Recently, reconfigurable intelligent surfaces (RISs) have received much interest from both academia and industry due to their flexibility and cost-effectiveness in adjusting the phase and amplitude of wireless signals with low-cost passive reflecting elements. In particular, many RIS-aided techniques have been proposed to improve both data rate and energy efficiency for 6G wireless communication systems. In this paper, we propose a novel RIS-based channel randomization (RCR) technique for improving physical-layer security (PLS) for a time-division duplex (TDD) downlink cellular wire-tap network which consists of a single base station (BS) with multiple antennas, multiple legitimate pieces of user equipment (UE), multiple eavesdroppers (EVEs), and multiple RISs. We assume that only a line-of-sight (LOS) channel exists among the BS, the RISs, and the UE due to propagation characteristics of tera-hertz (THz) spectrum bands that may be used in 6G wireless communication systems. In the proposed technique, each RIS first pseudo-randomly generates multiple reflection matrices and utilizes them for both pilot signal duration (PSD) in uplink and data transmission duration (DTD) in downlink. Then, the BS estimates wireless channels of UE with reflection matrices of all RISs and selects the UE that has the best secrecy rate for each reflection matrix generated. It is shown herein that the proposed technique outperforms the conventional techniques in terms of achievable secrecy rates.

scholarly journals Physical Layer Security for Visible Light Communication Systems: A Survey

2020 ◽  
Vol 22 (3) ◽  
pp. 1887-1908 ◽  
Author(s):  
Mohamed Amine Arfaoui ◽  
Mohammad Dehghani Soltani ◽  
Iman Tavakkolnia ◽  
Ali Ghrayeb ◽  
Majid Safari ◽  
...  
Keyword(s):  
Visible Light ◽  
Physical Layer Security ◽  
Communication Systems ◽  
Visible Light Communication ◽  
Physical Layer

Physical Layer Security For Dual-Hop VLC/RF Communication Systems

2018 ◽  
Vol 22 (12) ◽  
pp. 2603-2606 ◽  
Author(s):  
Zhaohui Liao ◽  
Liang Yang ◽  
Jianchao Chen ◽  
Hong-Chuan Yang ◽  
Mohamed-Slim Alouini
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Physical Layer ◽  
Rf Communication

scholarly journals On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4757 ◽  
Author(s):  
João Madeira ◽  
João Guerreiro ◽  
Rui Dinis ◽  
Paulo Montezuma ◽  
Luís Miguel Campos
Keyword(s):  
Physical Layer Security ◽  
Communication Systems ◽  
Physical Layer ◽  
Wireless Communication Systems ◽  
Secure Communications ◽  
Secrecy Rate ◽  
Security Issues ◽  
Single Carrier ◽  
Efficient Option ◽  
Value Decomposition

Multi-Input, Multi-Output (MIMO) techniques are seeing widespread usage in wireless communication systems due to their large capacity gains. On the other hand, security is a concern of any wireless system, which can make schemes that implement physical layer security key in assuring secure communications. In this paper, we study the physical layer security issues of MIMO with Singular Value Decomposition (SVD) schemes, employed along with Single-Carrier with Frequency-Domain Equalization (SC-FDE) techniques. More concretely. the security potential against an unintended eavesdropper is analysed, and it is shown that the higher the distance between the eavesdropper and the transmitter or receiver, the higher the secrecy rate. In addition, in a scenario where there is Line of Sight (LOS) between all users, it is shown that the secrecy rate can be even higher than in the previous scenario. Therefore, MIMO-SVD schemes combined with SC-FDE can be an efficient option for highly secure MIMO communications.

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