Multiple antenna based phyical layer security wireless systems

Y.-W. Peter Hong, Pang-Chang Lan, C.‐C. Jay Kuo

Joseph R. Childress

Xiaoming Chen, Derrick Wing Kwan Ng, Wolfgang Gerstacker +1 more

As a complement to high-layer encryption techniques, physical layer security has been widely recognized as a promising way to enhance wireless security by exploiting the characteristics of wireless channels, including fading, noise, and interference. In order to enhance the received signal power at legitimate receivers and impair the received signal quality at eavesdroppers simultaneously, multiple-antenna techniques have been proposed for physical layer security to improve secrecy performance via exploiting spatial degrees of freedom. This paper provides a comprehensive survey on various multiple-antenna techniques in physical layer security, with an emphasis on transmit beamforming designs for multiple-antenna nodes. Specifically, we provide a detailed investigation on multiple-antenna techniques for guaranteeing secure communications in point-to-point systems, dual-hop relaying systems, multiuser systems, and heterogeneous networks. Finally, future research directions and challenges are identified.

Anish Prasad Shrestha, Jai-Jin Jung, Kyung Sup Kwak

Physical layer security schemes for wireless communication can prevent eavesdropping even without use of upper layer cryptographic algorithms. As such, physical layer security based on information theoretic constraint is gaining both theoretical and practical importance in research community. In this paper, we investigate the physical layer security for wireless multicasting scheme consisting of a single antenna transmitter with multiple receivers and eavesdroppers both equipped with multiple antennas under quasi-static Rayleigh fading channel. We develop new closed-form expressions for the analysis of probability of positive secrecy as well as outage probability. We show that the physical layer security can be maintained even in presence of multiple eavesdroppers consisting multiple antennas. Furthermore, we also analyze the effect of number of antennas, users and eavesdroppers in the numerical results.

Fawad Ud Din, Fabrice Labeau

The increasing use of network-connected devices places a higher risk on security and privacy of data. The characteristics of the wireless channel can be employed to provide secrecy in wireless communication, in the form of Physical Layer Security (PLS). This review paper provides a tutorial on practical PLS based on multiple antenna and relay network systems, and identifies current challenges in this important research area. The emphasis is also put on the crucial step of secure channel estimation, as well as discriminatory channel estimation (DeE), without which the practical application of PLS remains limited.

Jennifer Chakravarty