Physical-Layer Security for Wireless and Optical Channels

Dimitris Syvridis, Evangelos Pikasis, Charidimos Chaintoutis

C. Vinodhini, S. Sivasankar

Security is a critical concern in wireless network. Physical layer security exploits the physical characteristics of wireless channel for secure transmission. The physical layer security approach is a competitive alternative to achieve information-theoretic secrecy. In the area of physical layer security which guarantees confidentiality by using Automatic Repeat Request technique, ARQ is described in a general way that includes its use over a wide range of underlying physical medium. Physical layer security focuses on exploiting the physical layer properties of the wireless channels to protect the confidential information transmission against eavesdropping. It describes the electric or optical signals used for communicating between two computers. Here a physical layer security technique is adopted for secret key distribution. In this improving physical layer based security for wireless network using jamming technique in automatic repeat request has been implemented. The automatic repeat request (ARQ) mechanism is a well-known technique to handle transmission errors, when data is transmitted over noisy channels. This service describes sending and receiving information with possible confirmation. The result obtained gives the performance of the increased signal to noise ratio and the decreased bit error rate and the mean square error.

Abuu B. Kihero, Haji Muhammad Furqan, M. M. Sahin +1 more

Security has emerged as one of the critical requirements of future wireless networks. Unlike traditional cryptography-based security, physical layer security (PLS) tends to exploit various features of the random wireless channel to secure not only the information being communicated but the whole communication process from any type of attack. Due to the limited capability of the legacy wireless networks, only a few channel features could be effectively exploited for PLS. Future wireless networks are envisioned to feature advanced transceiver technologies, signal processing techniques, channel control, and sensing capabilities which will allow them to easily access and extract additional channel features that can be readily exploited for PLS. The novel use cases to be accommodated in future networks are also found to experience some peculiar channel characteristics which enrich the list of channel features that can be exploited for PLS. This article, thus, tends to highlight the opportunities and potential challenges of these new channel features from the PLS perspective. In the course of the article, the assessment of important qualities while selecting a certain channel feature for the PLS application is discussed. The importance of the channel control concept and sensing technologies for PLS is highlighted. Finally, the article discusses the challenges and vulnerabilities of the channel-based PLS concept from which future research directions are derived.

Jennifer Chakravarty

Abuu B. Kihero, Haji Muhammad Furqan, Sahin, M. M. +1 more

Security has emerged as one of the critical requirements in future wireless networks. Unlike traditional cryptography-based security, physical layer security (PLS) exploits various features of the random wireless channel to secure not only the information being communicated but the whole communication process from any type of attack. Future wireless networks are envisioned to feature new technologies such as re-configurable intelligent surfaces, massive multiple input multiple output, and sensing, to accommodate the emerging use-cases. Both, the new technologies and the new use-cases have been found to enrich the channel characteristics by unveiling some new channel features which can be readily exploited to facilitate PLS. This article surveys these new channel features to reveal their potential for PLS implementation. In the course of the article, the assessments of important qualities while selecting a certain channel feature for the PLS application are discussed. The importance of the channel control concept and sensing technologies that facilitate the accessibility of certain channel features are highlighted from the PLS perspective. Security attacks aimed at channel characteristics, rather than the communication itself, in order to disrupt PLS implementations are also discussed. Finally, the article summarizes the possible research direction for channel-based PLS.

Hui‐Ming Wang, Tong-Xing Zheng