A Modern Defence-in-Depth Framework for OT Security

Operational Technology (OT) environments are facing unprecedented cybersecurity challenges. As enterprise IT, cloud connectivity, remote access, and Industry 4.0 initiatives extend deeper into industrial operations, the traditional concept of a "secure perimeter" is rapidly becoming obsolete.

A single compromised identity, trusted connection, or vulnerable legacy asset can expose critical operations to lateral movement, privilege escalation, and operational disruption.

Modern OT security requires a shift from perimeter trust to trusted-by-design – where every user, device, application, and connection is continuously verified, authorized, and monitored.

This whitepaper introduces the Microland OT Trust Framework, a practical Defence-in-Depth approach aligned with ISA/IEC 62443 and NIST SP 800-82. Built across five integrated security layers – Enforcement, Intelligence, Gatekeeper, Monitoring, and Gateway, the framework helps organizations strengthen cyber resilience while maintaining safety, availability, and operational continuity.

In this whitepaper, you'll learn how to:

• Move beyond perimeter-based security toward identity- and asset-centric protection
• Reduce lateral movement through micro-segmentation and policy-driven access controls
• Secure privileged and third-party remote access with continuous verification
• Operationalize Defence-in-Depth using a standards-aligned implementation framework
• Improve visibility, threat detection, and governance across converged IT and OT environments
• Strengthen resilience, compliance, and operational continuity without impacting industrial operations

Download the whitepaper to explore how industrial enterprises can build a trusted-by-design OT security architecture that protects critical infrastructure while enabling secure digital transformation.