Industrial control systems (ICS) face escalating cybersecurity threats due to increased remote access, third-party connectivity, and internet exposure. Recent critical infrastructure breaches highlight failures in perimeter defenses, particularly around identity enforcement, remote access management, and monitoring capabilities tailored for industrial protocols. Executives emphasize the need for granular identity controls, robust segmentation, continuous monitoring of third-party connections, and resilience-oriented security measures that enforce least privilege and validate identities continuously to prevent adversary activity before it impacts physical operations. Zero trust network principles must adapt to operational realities and safety constraints in ICS environments, prioritizing risk-informed phased implementation over doctrinal purity.
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