A digital twin — a live, continuously updated virtual model of a physical asset, process or facility — gets adopted for what it is good at: predictive maintenance, simulation, operational visibility. What gets less attention in the adoption decision is that a sufficiently accurate twin is also a detailed map of the physical system's behaviour, tolerances and failure modes, built for operational purposes but valuable for very different ones if it is exposed.Why a Twin Is a Different Risk Than the System It MirrorsSecuring a twin is not the same problem as securing the physical asset it represents, and treating it as an extension of existing OT security controls tends to miss that. A twin typically lives on IT infrastructure, is often accessible to a broader set of users than the physical control system ever was, and holds a model precise enough that someone studying it could infer how the real asset responds under specific conditions — including conditions someone might want to induce deliberately.What Governing a Twin Actually InvolvesClassifying the twin by what it reveals, not just what it monitors: a twin's sensitivity should be assessed against what an adversary could learn from it, not only against the operational value it provides.Segregating twin access from the physical control system's access: a broader audience for the model should not translate into a broader attack surface for the asset itself.Governing the data pipeline feeding the twin, not just the twin itself: a twin is only as trustworthy as the sensor data and integrations that keep it synchronised, and that pipeline is its own exposure.Deciding, deliberately, who outside the organization ever sees it: a twin shared with a partner or vendor for a legitimate operational reason has left the boundary that originally justified how sensitively it was treated.“A digital twin doesn't just monitor the asset. It describes it — and a sufficiently good description is its own kind of exposure.”Bringing the Twin Into the Existing Risk ModelNone of this is an argument against digital twins, which deliver real operational value in exactly the settings adopting them today. It is an argument for treating the twin as a governed asset in its own right — classified, access-controlled and included in the risk register — rather than as a monitoring convenience that inherited none of the scrutiny given to the physical system it represents.Share this articleX (Twitter)LinkedInFacebookCopy Link
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