Production environments are becoming increasingly interconnected—yet many OT systems remain in use for years or even decades. As a result, traditional, network-centric security models are reaching their limits. Modern OT security requires verifiable machine identities, centralized trust structures, and automated certificate processes.
This whitepaper shows how legacy OT can be integrated in a controlled manner into identity-centric security architectures—without having to completely replace existing production environments. The focus is on Zero Trust, PKI, certificate management, enrollment agents, and identity proxies as practical building blocks for secure brownfield environments.
Learn:
- Why NIS-2, the Cyber Resilience Act, and IEC 62443 are increasing the urgency for OT security
- Why traditional network perimeters are no longer sufficient in modern production architectures
- What role machine identities, X.509 certificates, and PKI play for Zero Trust in manufacturing
- Why self-signed certificates quickly become an operational risk in networked OT environments
- How legacy systems can be integrated into centralized trust models using enrollment agents and identity proxies
The secure production of tomorrow will not be achieved by completely replacing existing equipment, but rather by the controlled integration of historically evolved OT systems into modern trust and management structures.