EC 62443 Security Levels (SL 1–4) Explained | Why “We’re Secure Enough” Is a Risk

Описание: Many manufacturing organisations believe they are “probably around Security Level 2.”

In reality, IEC 62443 Security Levels (SL 1–4) are not opinions or self-assessments.
They are measurable, demonstrable outcomes that must be proven technically and operationally.

In this video, we explain:

What IEC 62443 Security Levels (SL 1–4) actually mean

Why even Security Level 1 (SL-1) cannot be achieved without proper foundations

How missing OT asset inventory and zones & conduits undermine Security Levels

Why many IEC 62443 and NIS2 compliance claims fail under audit

The difference between declaring security and demonstrating it

A key message from the standard is often overlooked:
➡️ Without a verified OT asset inventory and enforced network segmentation, Security Levels cannot be proven — regardless of tools or policies.

At IIoT Cybersecurity GmbH, we help manufacturers translate OT asset visibility and network segmentation into verifiable IEC 62443 Security Levels, aligned with real operational risk and regulatory expectations.

📩 Contact us to discuss:
IEC 62443 compliance
OT asset inventory
Zones & conduits
Security Level assessment
NIS2 readiness

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