Integrating FIDO Standards Into Secure OT Connectivity — A Practical Path to Resilience

Why It Matters

Strong, standards‑based authentication and device trust reduce credential theft, supply‑chain risk, and downtime, directly supporting regulated OT environments. The approach accelerates secure digital transformation without adding operational friction.

Key Takeaways

• Passkeys replace passwords, eliminating credential theft in OT
• FDO enables zero‑touch, cryptographic device onboarding
• BMO provides secure OS and software provisioning throughout lifecycle
• Strong, phishing‑resistant MFA simplifies third‑party remote access
• Identity‑first approach aligns with NCSC OT connectivity principles

Pulse Analysis

Operational technology networks have long relied on isolation and manual controls, but the expanding attack surface demands a modern identity framework. The UK NCSC’s Secure Connectivity Principles call for strong authentication at every network edge, a requirement that dovetails with FIDO’s passkey technology. By binding cryptographic keys to devices, passkeys eradicate shared secrets, delivering phishing‑resistant multi‑factor authentication for remote engineers, jump hosts, and privileged workstations. This shift not only curtails credential‑theft incidents but also streamlines audit trails, giving regulators clearer visibility into who accessed critical OT assets.

Beyond human identities, the FIDO Device Onboard (FDO) specification tackles the long‑standing challenge of securing devices before they ever touch the network. FDO’s zero‑touch onboarding creates a cryptographically attested identity for each sensor, gateway, or controller, eliminating factory‑default passwords and manual provisioning errors. The result is a uniform, supply‑chain‑aware onboarding process that can be applied across heterogeneous hardware, reinforcing segmentation strategies and reducing the risk of rogue devices infiltrating critical infrastructure.

The emerging Bare Metal Onboarding (BMO) standard pushes trust further by securing the entire software lifecycle. BMO enables devices to receive verified operating systems, applications, and configurations directly from an encrypted control plane, supporting automated rebuilds and rapid patching without human intervention. For operators, this translates into faster recovery from compromise, consistent compliance across distributed sites, and a clear procurement signal that vendors must support identity‑first, zero‑touch solutions. As OT environments continue to converge with IT, adopting FIDO’s suite of standards offers a scalable, open‑source pathway to resilient, future‑proof connectivity.