Physical Layer Security Against Eavesdropping in Internet of Drone Communication Systems: An Overview [Version 0]
07 February 2019 | By
Drones or unmanned aerial vehicles (UAVs) communication technology, which has recently been thoroughly studied and adopted by 3GPP standard (Release 15) due to its dynamic, flexible, and flying nature, is expected to be an integral part of future wireless communications and Internet of drones (IoD) applications. However, due to the unique transmission characteristics
and nature of UAV systems including the broadcasting, dominant line of site and poor scattering, providing confidentiality for legitimate receivers against unintended ones (eavesdroppers) appears to be a challenging goal to achieve in such scenarios.
Besides, the special features of UAVs represented by having
limited power (battery-operated) and processing (light RAM
and CPU capabilities), makes applying complex cryptography
approaches very challenging and inefficient for such systems.
This motives the utilization of alternative approaches enabled
by physical layer security (PLS) concept for securing UAV-based
systems. Techniques based on PLS are deemed to be promising
due to their ability to provide inherent secrecy that is complexity independent, where no matter what computational processing
power the eavesdropper may have, there is no way to decrypt
the PLS algorithms. This work is dedicated to highlight and
overview the latest advances and state of art researches on
the field of applying PLS to UAV systems in a unified and
structured manner. Particularity, it discusses and explains the
different, possible PLS scenarios and use cases of UAVs, which
are categorized based on how the drone is utilized and employed
in the communication system setup. The main classified categories
include the deployment of the flying, mobile UAV as a 1) base
station (BS), 2) user equipment (UE), 2) relay, or 4) jammer.
Then, recommendations and future open research issues are
stated and discussed.