The National Security Agency pushed Zero Trust past its IT-identity origins and into operational technology. The agency released a Cybersecurity Information Sheet (CSI) titled “Hardening Department of Defense (DoD) Critical Operational Technology (OT) Environments with Zero Trust (ZT) Principles,” applying continuous verification to the control systems that run physical infrastructure.

NSA directs the guidance primarily at National Security Systems (NSS), Department of Defense (DoD), and Defense Industrial Base (DIB) network owners and operators, but states it also applies to IT and OT managers and technical leaders more broadly. The core premise is familiar: Zero Trust “assumes the occurrence of adversarial breaches” and runs on a “never trust, always verify” principle, continuously checking users, devices, workflows, and communications against unauthorized access, lateral movement, and adversarial persistence.

NSA calls ZT adoption “essential for enhancing the security of legacy OT, enabling defense-in-depth across critical infrastructure while ensuring adherence with federal guidance.” Legacy OT rarely supports modern identity controls, so treating these environments as a Zero Trust design problem reframes how operators must segment and defend them.

NSA ties the urgency to AI. The agency notes organizations are folding artificial intelligence into OT, while adversaries use similar capabilities to automate reconnaissance and accelerate exploit development. Energy and water are named among the affected sectors.

For federal and critical-infrastructure leaders, this is a national-level architectural reference from NSA, not a single-agency pilot. It gives OT teams authoritative footing to justify Zero Trust investment in environments long treated as exceptions.

Source: hstoday.us