Simplifying Adoption of ISA/IEC 62443 Using the Zero Trust Model for Operational Technology | White Paper 1 Simplifying Adoption of ISA/IEC 62443 Using the Zero Trust Model for Operational T echnology Introduction According to a study by Ponemon Institute, half of all organizations and companies that depend on operational technology (OT) and industrial control systems (ICS) have suffered a disruption of or impact on OT operations due to a cyber incident, resulting in downtime to plant or operational equipment. 1 Depending on the industry, a cyber event in OT systems that results in disruption or misuse could mean sig- nificant damage—physical, financial, environmental, and/or health and safety. As more IT and OT systems are converged, the opportunity for cyber events to imp

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