Based on the NSA’s October 8, 2026 operational technology Zero Trust guidance; supplemented with joint CISA guidance and NIST OT security practices. Written for infrastructure operators, OT engineers, security architects and leaders accountable for essential services.
THE OPERATING PRINCIPLE
Verify access. Contain movement. Preserve safety.
In operational technology, defenses work only if the physical process remains safe, reliable and recoverable. Apply Zero Trust around the systems you have, not an idealized IT network.
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