CI Fortify, Advice for isolating vital systems
policy · policy:cisa-ci-fortify-ot-isolation-guidance-2026
Joint guidance from CISA, the Australian Signals Directorate's ACSC (lead author), NCSC UK and the Canadian Centre for Cyber Security, first published 28 July 2026, giving critical-infrastructure operators a structured method to isolate vital operational technology and its enabling systems during a cyber incident, including the instruction to treat any carrier-provided service as untrusted and to implement encryption over such links on a dedicated device rather than in the OT device itself (ASD ACSC, 2026-07-28).
Aliases: CI Fortify Initiative, CI Fortify OT isolation guidance
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