About this Research Topic
The continuous evolution of wireless communication networks, including the futuristic systems, e.g. 6G technologies, IoE, UAV-based communications, and hybrid terrestrial-satellite (HTS) systems, imposes several challenging requirements on their deployments. Energy efficiency, sustainability, high-speed communications, and security are among the strong key requirements. Notably, security is becoming more critical, especially with the recent advancements in computing facilities. In this regard, physical layer security (PLS) has been currently among the hot spots in wireless communications and information security. Such interest is driven by the broadcast nature of the wireless RF link, making it vulnerable to intrusion threats of potential eavesdropping devices attempting to overhear legitimate links. Similarly, the long-range optical communications through divergent beams yields other potential threats in overhearing the legitimate optical link. Unlike conventional security solutions which rely on the computationally demanding cryptographic protocols, PLS paradigms exploit the randomness property of the communication channels to realize simple yet perfectly secure communications.
In various works and prototypes in the wireless communication arena, there have been several key technologies advocated for improving the PLS level. Initial works in the PLS advocated benefiting from the diversity techniques (e.g., time, frequency, space) and channel coding, which are key techniques the current and future technologies, alongside the use of artificial noise signals to disrupt the wiretap user. However, the recent researches in such wireless systems have proposed several enhanced secure transmission schemes, such as massive MIMO, optical wireless communications, beamforming, precoding, etc. Furthermore, the integration of non-orthogonal multiple-access (NOMA) with power transfer protocols (e.g., wireless power transfer (WPT), simultaneous wireless information and power transfer (SWIPT) can be exploited in order to design robust PLS schemes to cope with the continuous secrecy demand. Considering its potential application in future wireless networks, PLS will receive even more research interest from both academia and industry. However, there are still a number of open issues to be solved before PLS solutions can be successfully implemented in practical systems. This Research Topic aims to bring together leading researchers in both academia and industry from diversified backgrounds to unlock the potential of PLS for futuristic wireless networks.
The themes of interest include, but are not limited to:
• Physical layer security for UAV communication systems
• Physical layer security for communication systems assisted intelligent reflecting surfaces
• SWIPT and wireless power transfer assisted communication security models
• Secrecy capacity and energy efficiency optimization in wireless communications.
• Physical layer security for optical communication systems
• Physical layer security for millimeter wave communications
• Relay-based and cooperative secure communications
• Massive MIMO-based security models for futuristic communication systems
• Advanced signal processing and game theory for physical layer security
• Physical layer security techniques for IoT
• Machine learning-based physical layer security
• Machine learning-based physical-layer channel authentication
• Blockchain-based PLS for IoT
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Keywords: Physical layer security, Wireless communications, Cognitive radio, UAV communications, Massive MIMO, Intelligent reflecting surfaces, Power transfer
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