Why secure industrial communication depends on deployment as well
May 2026
Fieldbus & Industrial Networking
The Industrial Security Harmonisation Group (ISHG) has released a joint industry perspective highlighting a critical truth in industrial cybersecurity: secure communication is not determined by protocols alone, but by how they are deployed and managed in real-world environments.
The ISHG, comprising leading industry organisations, including the FieldComm Group, ODVA, OPC Foundation and PROFIBUS & PROFINET International, collaborates regularly to align security concepts across Ethernet and non-Ethernet communication protocol technologies. Their shared mission is to reduce complexity for end users and promote consistent, effective cybersecurity practices in industrial automation systems.
Industrial communication protocols serve as the backbone of modern automation, enabling seamless connectivity between devices, systems and applications across both process and factory environments. However, many widely used protocols were originally developed without cybersecurity as a primary design consideration.
The ISHG’s joint work challenges the simplistic binary classification of protocols as secure or insecure, instead, it emphasises a more practical and realistic approach:
• Security is context-dependent: It relies on how protocols are configured, where they are deployed and the surrounding operational environment.
• Built-in security features are not sufficient alone: Even advanced protocols require correct implementation and maintenance.
• Compensating controls are essential: Network architecture, segmentation (zones and conduits), monitoring and physical safeguards play a critical role, especially for legacy and non-Ethernet systems.
This deployment-focused perspective aligns closely with emerging regulatory expectations, including those outlined in the EU Cyber Resilience Act (CRA) for hardware and software products, and NIS2 for entities and organisations for operations.
The ISHG presented these insights during its session at Hannover Messe 2026, offering guidance to industry stakeholders on how to effectively secure industrial communication systems in practice.
ISHG is a collaborative initiative of leading industrial communication organisations who are working to harmonise security approaches across Ethernet and non-Ethernet communication technologies and to simplify cybersecurity implementation for end users.
For more information visit fieldcommgroup.org/ishg, odva.org/ishg, opcfoundation.org/ishg, profibus.com/ishg
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