Air Gaps and OT Security in the Zero Trust Era

OT security — air gap trust assumptions, removable media risks, and supply chain integrity in ICS environments

OT security has always rested on a core assumption: if a system is physically separated, it is safe. For years, the air gap represented real certainty. No routable path, no shared infrastructure, no logical bridge — and no external attack surface to speak of. In safety-critical industrial environments, that clarity mattered. But the industrial world…

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