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ANSI/ISA-62443-3-2-2020
Security for industrial automation and control systems, Part 3-2: Security risk assessment for system design
This document establishes requirements for: • defining a system under consideration (SUC) for an industrial automation and control system (IACS); • partitioning the SUC into zones and conduits; • assessing risk for each zone and conduit; • establishing the target security level (SL-T) for each zone and conduit; and • documenting the security requirements
The International Society of Automation [isa]
