Operational cybersecurity awareness needs to include OT identity

At a glance

What this is: This is a cybersecurity awareness article for operational technology that argues OT security must be framed around uptime, safety, and machine access rather than abstract IT risk.

Why it matters: It matters because identity, access, and automation choices in OT affect NHI governance, operational resilience, and how human teams approve or trust machine connections.

👉 Read Corsha's article on cybersecurity awareness for OT and critical infrastructure

Context

Operational technology security is often treated as a separate conversation from identity governance, but the article argues that separation is exactly the problem. In OT environments, the primary risk is not just data exposure. It is loss of uptime, unsafe commands, and machine access paths that can affect physical processes.

The article’s core point is that cybersecurity awareness has to fit the way operations teams work. That means making security understandable in terms of continuity, safety, and recoverability, then reducing friction so machine connections, shared logins, and vendor access can be governed without slowing production.

Key questions

Q: How should organisations secure machine access in OT environments without slowing operations?

A: Start by identifying which machine connections are actually business-critical, then apply identity-based controls that are automatic, attributable, and revocable. The goal is not to add manual steps at runtime. It is to ensure every connection has an owner, an access scope, and an expiry condition that operations can live with.

Q: Why do shared logins create so much risk in operational systems?

A: Shared logins remove attribution, which makes it hard to tell who changed a command, who approved access, or who should be cut off after an incident. In OT, that problem is amplified because the same credential may reach systems that influence physical processes. Shared access also makes recovery and forensic review slower.

Q: When should teams convert always-on vendor access into scheduled access?

A: Do it whenever external access can reach engineering, supervisory, or production systems and does not need to remain open continuously. If a vendor connection is only needed for maintenance, troubleshooting, or periodic review, it should be time-bounded and explicitly approved rather than permanently trusted.

Q: What is the difference between automation and governed machine identity?

A: Automation simply means a system performs an action on its own. Governed machine identity means that action is tied to policy, ownership, scope, and revocation. In practice, a machine can log in automatically and still be poorly governed if no one can explain why it has access or how to remove it.

Technical breakdown

Why OT machine connections need identity-centric controls

Operational systems rarely fail because of a single dramatic control gap. They fail when machine-to-machine connections are left implicit, shared, or permanently trusted, so access becomes invisible to operations teams. Identity-centric controls bring those connections into scope by binding authentication, policy, and verification to each machine relationship rather than to a network location or static credential. In OT, that matters because a connection can be both operationally necessary and safety-relevant. Once the access path is explicit, it can be reviewed, constrained, and monitored without changing the underlying process logic.

Practical implication: inventory every machine connection and map it to an accountable identity before you try to secure it.

Automation reduces friction, but only if access is still governed

The article correctly treats automation as the way OT teams adopt security without extra burden. But automation does not remove the need for governance. A machine that logs in on its own is still using an identity, still relying on trust assumptions, and still creating audit and lifecycle obligations. The control question is whether automation simply hides the credential handling, or whether it also enforces policy, verification, and revocation. In operational environments, that distinction separates convenience from control.

Practical implication: require policy enforcement and revocation at the point of automated access, not after the fact.

Shared logins and vendor access create standing privilege in OT

The article’s examples of shared floor logins and always-open vendor connections point to a classic standing-privilege problem. When multiple people or external parties reuse the same access path, accountability disappears and recovery gets harder after a fault or incident. In OT, the risk is amplified because the access path often touches systems that govern physical output. Security awareness has to translate this into operational language: if a credential or connection is always available, it is always a potential control failure. Scheduled access, per-session identity, and explicit offboarding are the governance levers that change that equation.

Practical implication: replace shared and always-on access with time-bounded, individually attributable machine and vendor access.

Threat narrative

Attacker objective: The attacker’s objective is to disrupt operations or alter control behaviour in ways that affect uptime, safety, and delivery commitments.

1. Entry occurs through shared logins, vendor connections, or other always-open OT access paths that were created for convenience rather than accountability.
2. Escalation follows when the same access path is reused beyond its intended purpose, allowing a change to commands, pressure, temperature, or other operational settings.
3. Impact lands in production disruption, extended recovery, or safety exposure when tampered commands reach control systems that influence physical processes.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• McKinsey AI platform breach — McKinsey AI platform hack exposed 46M chats and sensitive data.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

OT awareness fails when cybersecurity is framed as an IT control problem instead of an operational identity problem. The article is right to move the conversation toward uptime and safety, because OT teams do not respond to abstract policy language. What matters is whether the identity model fits the way machines, vendors, and control systems actually interact. The practitioner conclusion is that awareness only changes behaviour when it reflects operational reality.

Standing access is the real governance failure behind many OT security gaps. Shared logins, always-open vendor access, and machine connections that never expire all create the same condition: accountability cannot be re-established quickly when something goes wrong. That is why lifecycle governance matters as much in OT as it does in enterprise IAM. The practitioner conclusion is to treat offboarding and access expiry as operational controls, not administrative chores.

Automated machine login creates identity responsibility, not identity relief. The article treats automation as a way to remove friction, but the governance obligation remains because every automated connection still represents a trust decision. If the machine logs in on its own, the programme still has to know who owns it, what it can reach, and how it is revoked. The practitioner conclusion is to govern machine identity at the same rigor you apply to any other privileged access path.

Identity blast radius is the right concept for OT cyber awareness. The article repeatedly links access choices to downstream operational impact, which is exactly how practitioners should think about OT governance. A single credential, vendor tunnel, or shared login can affect more than one system when it sits close to production. The practitioner conclusion is to measure how far an access path can reach before you decide whether it belongs in production at all.

From our research:

• 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, according to The State of Non-Human Identity Security.
• Only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, compared to nearly 1 in 4 for securing human identities, according to The State of Non-Human Identity Security.
• For the broader breach and lifecycle pattern behind this visibility problem, review The 52 NHI breaches Report for real-world cases of standing access and unmanaged identity exposure.

What this signals

Identity blast radius: OT programmes should now measure how far a single machine credential, shared login, or vendor connection can reach before it touches production. That is a governance metric, not just an access metric, and it is becoming more important as automation spreads through plants and field systems.

With 85% of organisations lacking full visibility into third-party vendors connected via OAuth apps, per The State of Non-Human Identity Security, the same visibility problem shows up in OT as always-open vendor paths and inherited trust. The next control maturity step is not more awareness messaging. It is lifecycle control over machine and vendor access.

Security teams that already use Ultimate Guide to NHIs , Key Challenges and Risks as a baseline should extend the same logic into OT asset estates. In practice, that means treating every machine connection as an identity decision, not a networking convenience.

For practitioners

• Map every OT connection to an accountable identity Document which machine, vendor, or operator owns each connection into control systems, and record whether that access is shared, scheduled, or always open. Use that map to find the links that currently have no explicit owner or review cycle.
• Replace shared floor logins with attributable access Phase out common credentials used by multiple operators and maintenance teams. Move to individually attributable access paths so incident review, change control, and revocation can be tied to a specific person or machine.
• Schedule external access instead of leaving it persistent Review every vendor path into engineering workstations and production systems, then convert always-on connectivity into time-bounded access with clear approval and expiry rules.
• Treat automated login as a governed control surface For any machine that authenticates on its own, define ownership, scope, and revocation in the same workflow you use for privileged human access. Do not let automation bypass lifecycle governance.

Key takeaways

• OT cybersecurity becomes materially more effective when teams frame it as a machine identity and operational continuity problem, not a generic awareness campaign.
• Shared logins, persistent vendor access, and unaudited machine connections create standing privilege that slows incident response and increases safety exposure.
• Operations teams should secure every connection with ownership, scope, and expiry rules so automation improves resilience without weakening governance.

Key terms

• Machine Identity: A machine identity is the set of credentials and trust attributes a system uses to authenticate itself to other systems. In OT, that includes devices, controllers, services, and vendor connections that must be owned, scoped, and revoked like any other access path.
• Standing Privilege: Standing privilege is access that remains available all the time rather than being granted only when needed. In operational environments it creates persistent trust, weak attribution, and a larger blast radius when a credential, connection, or login path is misused.
• Identity Blast Radius: Identity blast radius is the amount of operational damage a single identity can cause if it is compromised, misused, or left unchecked. In OT, the concept helps teams judge whether a credential reaches only one device or can influence production, safety, and recovery.
• Scheduled Access: Scheduled access is a governance pattern where external or elevated connectivity is enabled only for a defined period and then expires. For OT, it is a practical way to reduce always-on trust while preserving the maintenance and troubleshooting access that operations still need.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.

This post draws on content published by Corsha: cybersecurity awareness for operational systems and critical infrastructure. Read the original.