From Dining Cryptographers to dining things: Unobservable communication in the IoT

The increasing adoption of the Internet of Things introduces new threats that affect the privacy of users. Current privacy enhancing technologies are not sufficient to address all these new threats. This paper explains one of the most powerful protocols, namely DC-net. The DC-net protocol, while more than 30 years old, was never used in real-life due to its overhead and sensitivity with regards to disrupters. However, many improvements have been contributed to the original protocol, which is summarised in this paper. The main contribution of this work is the implementation of a proof-of-concept DC-net suited for constrained microcontroller-based devices. The challenges faced and the optimisations done throughout the implementation are presented.