  5G-enabled drones have potential applications in a variety of both military
and civilian settings (e.g., monitoring and tracking of individuals in
demonstrations and/or enforcing of social / physical distancing during
pandemics such as COVID-19). Such applications generally involve the collection
and dissemination of (massive) data from the drones to remote data centres for
storage and analysis, for example via 5G networks. Consequently, there are
security and privacy considerations underpinning 5G-enabled drone
communications. We posit the potential of leveraging blockchain to facilitate
privacy preservation, and therefore in this article we will review existing
blockchain-based solutions after introducing the architecture for 5G-enabled
drone communications and blockchain. We will also review existing legislation
and data privacy regulations that need to be considered in the design of
blockchain-based solutions, as well as identifying potential challenges and
open issues which will hopefully inform future research agenda.
