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The control systems inside a power generation facility govern physical processes, not data flows. An attacker who reaches that layer stops electricity from being produced.
That architecture is now under direct scrutiny across the UK energy sector after hackers with reported links to Iran shut down a small power facility.
Security chiefs have since briefed energy executives with what officials called advice, direction and next steps. The size of the target is frequently read as a measure of severity.
It is better read as a proof of capability. Any attack that physically takes a generation asset offline has crossed from network intrusion into operational disruption.
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