Securing Fleets of Consumer Drones at Low Cost

12/11/2019 ∙ by Nick Frymann, et al. ∙ 0

In recent years, the use and suitability of drones for many applications, including surveillance, search and rescue, research, agriculture and civil engineering, has greatly increased due to their improved affordability and improved functionality. However, low-cost consumer drones are rarely designed to work in fleets, which limits the applications for which business, research and individuals may deploy such drones. Proprietary, commercial and bespoke options are available at higher cost and existing solutions providing fleet functionality have limited security, if any, which excludes their use for sensitive applications. In this paper, we discuss the repurposing of consumer off-the-shelf (COTS) drones for use in secured fleets and provide the design, implementation and evaluation of a complete approach for creating end-to-end secured fleets of consumer drones (SFCD). We present a protocol for securing communications within fleets whilst employing more efficient symmetric key cryptography throughout to reduce the impact of our security on the limited and resource-constrained COTS drones, exploiting the characteristics of a fleet with an online and central ground control station, which may act as a key distribution centre. The protocol allows an arbitrary number of channels to be established to authenticate and optionally encrypt real-time data transmitted on these channels. We also discuss routing in fleets, as well as the control and monitoring of them, to allow SFCD to be fully deployed; providing an extensive and thorough solution. Our experimental evaluation confirms the suitability of low-cost consumer drones for use in SFCD, with flight time impacted by only 9.9 bandwidth of 4.7Mibit/s.

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