A smart city delivers better services through connected systems - water, energy, transport, safety - using technology as a means, not an end. Its value lies in integrating IT and OT infrastructure, but this convergence also creates new vulnerabilities, exposing legacy operational systems to cyber threats they were never designed to withstand.
A smart city is often sold as technology. It isn't. At its core it is a city that contextually delivers value using existing and emerging methods and technology - better water, energy, transport and safety for the people who live there. The technology is only the means; service delivery and quality of life are the point. What makes it 'smart' is connection.
A smart city is a system of systems - water, electricity, traffic, buildings and public safety, each instrumented with sensors and linked so that data can inform decisions in real time. That interconnection is where the value sits, and also where the exposure begins.
Beneath every smart service is physical infrastructure. The pumps, valves, substations, traffic signals and building systems are run by operational technology (OT) - the SCADA systems, PLCs and sensors that monitor and control physical processes. OT differs from IT in a way that matters for leadership: where IT protects data, OT protects safety, availability and physical processes. An IT breach typically exposes information; an OT breach can stop water, cut power, or endanger people.
The defining shift in a smart city is the convergence of IT and OT. Historically these were separate worlds - OT was isolated, 'air-gapped', and rarely touched. Digital transformation connected them, which delivers the real-time visibility a smart city needs but also exposes OT to the same threats IT has always faced, against equipment that was never designed to be patched, scanned or exposed.