Smart and Secure Wireless Communications via Reflecting Intelligent Surfaces: A Short Survey

With the emergence of the Internet of Things (IoT) technology, wireless connectivity should be more ubiquitous than ever. In fact, the availability of wireless connection everywhere comes with security threats that, unfortunately, cannot be handled by conventional cryptographic solutions alone, espe...

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Bibliographic Details
Published in:IEEE open journal of the Communications Society 2020, Vol.1, p.1442-1456
Main Authors: Almohamad, Abdullateef, Tahir, Anas M., Al-Kababji, Ayman, Furqan, Haji M., Khattab, Tamer, Hasna, Mazen O., Arslan, Huseyin
Format: Article
Language:English
Subjects:
Array signal processing
Communication networks
Communication system security
Cryptography
Internet of Things
Literature reviews
Measurement
Optimization
Performance measurement
Physical layer security (PLS)
reconfigurable intelligent surface (RIS)
Reliability
secrecy outage probability
secrecy rate
Security
Wireless communications
Wireless networks
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Summary:With the emergence of the Internet of Things (IoT) technology, wireless connectivity should be more ubiquitous than ever. In fact, the availability of wireless connection everywhere comes with security threats that, unfortunately, cannot be handled by conventional cryptographic solutions alone, especially in heterogeneous and decentralized future wireless networks. In general, physical layer security (PLS) helps in bridging this gap by taking advantage of the fading propagation channel. Moreover, the adoption of reconfigurable intelligent surfaces (RIS) in wireless networks makes the PLS techniques more efficient by involving the channel into the design loop. In this article, we conduct a comprehensive literature review on the RIS-assisted PLS for future wireless communications. We start by introducing the basic concepts of RISs and their different applications in wireless communication networks and the most common PLS performance metrics. Then, we focus on the review and classification of RIS-assisted PLS applications, exhibiting multiple scenarios, system models, objectives, and methodologies. In fact, most of the works in this field formulate an optimization problem to maximize the secrecy rate (SR) or secrecy capacity (SC) at a legitimate user by jointly optimizing the beamformer at the transmitter and the RIS's coefficients, while the differences are in the adopted methodology to optimally/sub-optimally approach the solution. We finalize this survey by presenting some insightful recommendations and suggesting open problems for future research extensions.
ISSN:2644-125X
2644-125X
DOI:10.1109/OJCOMS.2020.3023731