IEC 62443 (OT/ICS security)

Industrial cybersecurity for OT and ICS — zones, conduits and security levels.

IEC 62443 is the global standard family for cybersecurity of Industrial Automation and Control Systems (IACS) — OT, ICS, SCADA and connected production environments. It defines requirements for asset owners, system integrators and product suppliers across the full lifecycle.

Core concepts

Zones & conduits — segmenting OT networks based on risk.
Security Levels (SL 1–4) — graded protection against opportunistic to nation-state attackers.
Foundational Requirements — identification, use control, integrity, confidentiality, data flow, timely response, resource availability.
Secure development lifecycle for product suppliers (62443-4-1).

How we help

OT asset & risk assessment — inventory, criticality, threat model.
Zone & conduit design aligned with plant architecture.
Security Level target setting per zone and gap analysis vs. current state.
Roadmap & project delivery — segmentation, hardening, monitoring, incident response.
Alignment with NIS2 for in-scope manufacturing and critical sectors.

Contact Pieter Gielen for OT/ICS security projects under IEC 62443.

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