A reference architecture for IIoT and industrial control systems testbeds

Conducting cyber security research within live operational technology and industrial Internet of Things environments is, understandably, not practical and as such research needs to be undertaken within non-live mimics or testbeds. However, testbeds and especially those which are built using real-world infrastructure are expensive to develop and maintain. Moreover, such testbeds tend to be representative of a single industry vertical (often based upon the skill set or research focus) and built in isolation. In this paper we present a reference architecture, developed whilst designing and building the Bristol Cyber Security Group ICS/IIoT testbed for critical national infrastructure security research.