Understanding ISA/IEC 62443: A Guide for OT Security Teams
Summary: This third Dragos blog in a series on the ISA/IEC 62443 standards explains key concepts for assessing alignment with the industrial cybersecurity framework, which aims to improve the reliability, integrity, and security of Industrial Automation and Control Systems (IACS) through a risk-based, methodical process. It covers risk management under Part 3-2, the division of systems into security zones and conduits, the Purdue Reference Model for describing data flows in industrial networks, and three Security Level types: Target (SL-T), Capability (SL-C), and Achieved (SL-A).
Why it matters: The standards separate what you want (SL-T) from what your technology can natively deliver (SL-C) and what you actually measured in operation (SL-A) - a gap that has to be closed with compensating countermeasures, often policies and procedures rather than technology.
Read the original at Dragos Blog ↗
- Topics
- OT / ICS & Critical Infrastructure
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