CYBERSECURITY
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SECURING INDUSTRIAL NETWORKS
THREE ARCHITECTURE STRATEGIES ALIGNED WITH IEC 62443 Theo Lai, Product Manager, Moxa
cybersecurity is to enhance existing architectures with layered, pragmatic security measures.
PROCESSONLINE.COM.AU
I
based defences to a layered, identity-aware ndustrial networks are no longer approach. Principles such as defence in depth isolated islands. The convergence and zero trust, while originating in IT, are of information technology (IT) and now essential considerations for securing OT operational technology (OT) systems, environments. Rather than assuming implicit driven by digital transformation, remote trust based on network location, modern operations and data-driven decisionindustrial networks require continuous making, has fundamentally reshaped the verification of devices, users and traffic cybersecurity landscape. behaviours, ensuring that every interaction is Historically, OT environments relied on explicitly authorised and monitored. physical isolation (air gapping) and perimeter The IEC 62443 standard provides a defences to safeguard critical systems. comprehensive framework for securing However, the rise of ransomware, supply industrial automation and control systems. It chain attacks and advanced persistent threats defines concepts such as zones, conduits and has exposed the limitations of this approach. defence-in-depth strategies that guide the To address these challenges, cybersecurity design of secure network architectures. strategies have evolved from >> perimeter-
PROCESS TECHNOLOGY OCT/NOV 2025
The goal of industrial
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