… of physical-layer security (PLS). Finally, we provide an overview of PLS schemes which aim
to enhance data confidentiality … the capabilities and limitations of physicallayer security (PLS) …

… The secrecy metrics from information-theoretic security are well-established and have
laid the foundation of secrecy coding in the physical layer. However, they are challenging to …

… security vulnerabilities, physical layer security (PLS) has been recently introduced as a promising
candidate to ensure the security of … , data confidentiality is information/data secrecy. It is …

… on physical layer security mainly focuses either on the secrecy … , physical layer security
presents distinctive advantages and promising prospects. Therefore, the physical layer security …

… A wide range of techniques can be employed to secure communications at the physical layer
… “Secrecy Metrics,” we discuss several common security constraints that are used in secrecy …

… Recently, significant efforts have been made to pave the way for the integration of physical
layer security (PLS) in contemporary and futuristic networks. The primary motivation behind its …

… [30] combined secure beamforming with cooperative jamming to enhance the physical layer
security. … to minimize the secrecy outage probability subject to the secrecy rate requirement. …

… Both physicallayer security primitives rely on the properties of … , confidentiality and authenticity
are two security goals which … even though the main physical-layer operation required is …

… approach to achieve the required level of secrecy. In this article, we present an overview
of the physical-layer security for CRNs. Certain threats over the physical layer of the CRN are …

… Physical-layer technologies proposed for further security enhancements in protecting user
data confidentiality include secure communications using optical chaos (SCOC), optical code-…