Some practical lessons from applying OT cyber security to systems integration: understanding risk, defining security boundaries, applying IEC 62443 and treating security as part of control-system engineering.
A practical guide to IEC 62443, the NCSC Cyber Assessment Framework, UK cyber law, zones and conduits, network segmentation, secure remote access, industrial firewalls, asset management, patching, and cyber security across the engineering lifecycle.
Engineering notes from replacing a legacy turbine HMI while preserving serial communications, alarm handling, historian exports and familiar operator behaviour.