Physical layer security for next generation wireless systems

R. K. Sharma

This chapter provides a survey of physical layer security and key generation methods. This includes mainly an overview of ongoing research in physical layer security in the present and next generation communication networks. Although higher layer security mechanisms and protocols address wireless security challenges in large extent, more security vulnerabilities arise due to the increasingly pervasive existence of wireless communication devices. In this context, the focus of this chapter is mainly on physical layer security. Some security attacks in general are briefly reviewed. Models of physical layer security, information theoretic works, and key generation methods including quantization and reconciliation are discussed. Some latest developments for enhanced security like Multiple-Input Multiple-Output (MIMO) systems, reconfigurable antennas, and multiple relay systems are also presented. Finally, some existing and emerging application scenarios of physical layer security are discussed.

K. Gunaseelan, R. Dhanusuya, A. R. Abdul Rajak +1 more

Mohammad Tahir, Sigit Puspito Wigati Jarot, Muhammad Siddiqi

Geunyeong Jang, Byungha You, Haejoon Jung

The terrestrial and the non-terrestrial networks have been envisaged to be amalgamated to form the next generation networks. Further development in wireless communications may enable Internet of Things (IoT) to be extended to the large-scale wireless networks including satellites, which are vulnerable to both eavesdropping and malicious attacks by illegal users. In this context, physical layer security (PLS) has been attracting increasing attention on the ground of its potential to overcome those vulnerabilities with the randomness of the wireless channels. In this paper, we review the existing works on PLS in satellite communications and present the background of the satellite systems and the current challenges that need to be solved in the future.

Simone Soderi, Rocco De Nicola

Visible Light Communication (VLC) is a key technology for the sixth-generation (6G) wireless communication thanks to the possibility of using artificial environmental lights as a data transfer channel. Although VLC systems are more resistant against interference and less susceptible to security vulnerabilities like most wireless networks, VLC is even inherently susceptible to eavesdropping attacks. Moreover, since VLC is considered an enabling technology for 6G, specific mechanisms are needed to enforce data security. This paper considers improving the security of the next generation of wireless communications by using the Watermark Blind Physical Layer Security (WBPLSec) in VLCs. The main intuition is that RGB LEDs offer the possibility for Wavelength Division Multiplexing (WDM) as a useful support for the Spread-Spectrum (SS) watermarking. In this paper, we propose an approach that aims at obtaining VLC Physical Layer Security (PLS) by combining watermarking with an RGB LED jamming. We provide a performance analysis of the proposed security architecture based on the secrecy capacity in terms of its existence and outage probability. We prove that WBPLSec can be used to significantly improve confidentiality in the next generation of wireless communications. The results offer the possibility of creating a secure region around the legitimate receiver by leveraging the jamming optical power.

Marwan Yusuf