Amid the wider turmoil over 5G and national security, operators and their customers are more concerned in the immediate future over threats to emerging use cases, especially around the IoT (Internet of Things). To date, damaging attacks relating to the IoT have tended to involve recruitment of relatively dumb devices such as CCTV security camera in botnets for launching DDOS (Distributed Denial of Service) attacks. However, the attacks that brought down the Ukrainian power grid around Christmas 2015 gave an early, if as yet almost unique, demonstration of the potential threat posed to both national infrastructure and the Industrial IoT (IIoT) from the increased connectivity. In that case, the attack exploited the connectivity between the grid’s operational systems and the…