This book presents physical-layer security as a promising paradigm for achieving the
information-theoretic secrecy required for wireless networks. It explains how wireless networks
are extremely vulnerable to eavesdropping attacks and discusses a range of security techniques
including information-theoretic security artificial noise aided security security-oriented
beamforming and diversity assisted security approaches. It also provides an overview of the
cooperative relaying methods for wireless networks such as orthogonal relaying non-orthogonal
relaying and relay selection.Chapters explore the relay-selection designs for improving
wireless secrecy against eavesdropping in time-varying fading environments and a joint relay
and jammer selection for wireless physical-layer security where a relay is used to assist the
transmission from the source to destination and a friendly jammer is employed to transmit an
artificial noise for confusing the eavesdropper. Additionally the security-reliability
tradeoff (SRT) is mathematically characterized for wireless communications and two main
relay-selection schemes the single-relay and multi-relay selection are devised for the
wireless SRT improvement. In the single-relay selection only the single best relay is chosen
for assisting the wireless transmission while the multi-relay selection invokes multiple
relays for simultaneously forwarding the source transmission to the destination.Physical-Layer
Security for Cooperative Relay Networks is designed for researchers and professionals working
with networking or wireless security. Advanced-level students interested in networks wireless
or privacy will also find this book a useful resource.
