IEC 62443: Hardening Windows Hosts in the Control Network — HMIs, Historians and Engineering Workstations

Date
2027-03-31
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on Hardening Windows Hosts in the Control Network — HMIs, Historians and Engineering Workstations (IEC 62443 — Industrial Cybersecurity). What We'll Cover: Why Windows hosts are the usual beachhead and where host hardening sits in the zone's defense in depth The hardening method step by step: application allowlisting, removal of admin rights, USB control, service reduction, EDR selection for OT How hardening controls map to FR2/FR3 SRs and the secure configuration baselines they produce Common mistakes: antivirus scans that stall HMIs, unpatched EOL Windows with no compensations, engineering workstations dual-homed across zones Evidence auditors sample: baseline compliance reports, local admin account inventories and USB exception records Related topics: host hardening · application allowlisting · hmi security · engineering workstation · historian hardening · usb control · edr ot · secure baseline · windows in ot · eol operating systems · dual homing · least privilege hosts Critical Systems Analysis provides embedded functional safety consulting for IEC 62443 — Industrial Cybersecurity. Learn more: https://criticalsystemsanalysis.com Partner with us: https://meetings.hubspot.com/benjamin-twombly/strategic-partnerships

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About Functional Safety Foundations

This online session delivers expert-led instruction on the regulatory landscape and implementation approach for Functional Safety Foundations.

The cross-sector fundamentals underlying every functional safety standard: risk as severity × likelihood, the safety function concept, integrity levels, the safety lifecycle, and the split between random and systematic failures.

What it regulates

Shared vocabulary and reasoning: hazard → risk → risk reduction allocation → safety requirement → verified implementation → maintained integrity in operation.

Who must comply

Everyone entering the field — the conceptual base of the entire catalog.

Key requirements of Functional Safety Foundations

  • Hazard and risk fundamentals
  • Safety function anatomy: sensor-logic-actuator with defined safe state
  • Integrity ladders (SIL/PL/ASIL/DAL) as risk-reduction currencies
  • Random vs systematic failure treatment
  • Lifecycle and management of functional safety incl. competence

Key concepts: Functional Safety Foundations

Risk reduction allocation
Distributing required risk reduction among mechanical design, safeguards, control functions and procedures.
Functional safety management
Planning, competence, documentation and assessment wrapped around technical work.
Random vs systematic
Hardware wear-out/chance failures quantified statistically versus design/process errors controlled by rigor.
Safe state
The defined condition a function drives the equipment to on demand or fault.

Frequently asked questions: Functional Safety Foundations

Why can't testing alone prove safety?

Rare-event targets (like 1e-7/h) are unverifiable by test duration, and systematic errors evade random testing — hence the standards' dual machinery of quantified hardware analysis plus process rigor and independent assessment.

Standard information based on the published text of Functional Safety Foundations. Event content is provided by the host. For authoritative guidance, consult the official standard body.