Why do critical infrastructure sectors need stronger identity governance as regulations tighten?

Critical infrastructure operators face higher scrutiny because access failures can cascade into public safety and service disruption. As regulations such as NIS2 and DORA raise expectations, identity governance becomes the control plane for proving who or what can act, when, and under which policy. Stronger governance helps organisations demonstrate accountability, reduce overprivilege, and support resilience objectives.

Why This Matters for Security Teams

Critical infrastructure operators are being measured on whether identity controls can withstand operational pressure, not just audit scrutiny. As EU NIS2 Directive obligations push organisations toward stronger accountability, identity governance becomes the practical way to prove who or what is authorised to act, and under which conditions. That matters because overprivilege, stale access, and unclear ownership can turn a routine compromise into service disruption.

NHI Management Group research shows the scale of the issue: NHIs outnumber human identities by 25x to 50x in modern enterprises, and 97% of NHIs carry excessive privileges. When the identity layer is weak, regulators see not just a compliance gap but a resilience problem. Current guidance suggests that identity evidence, not policy statements alone, is what will increasingly determine whether operators can demonstrate control during incidents and supervisory reviews. In practice, many security teams encounter identity failure only after a privileged account has already been used to move from IT into operational systems.

How It Works in Practice

Stronger identity governance in critical infrastructure is about making access decisions explicit, reviewable, and time-bound across both human and non-human identities. That usually means moving from broad standing access to least privilege, role scoping, and just-in-time elevation, with every entitlement tied to an owner and a business purpose. The operational goal is to answer four questions fast: who requested access, what resource was touched, why it was needed, and how long it remained valid.

Practitioners usually combine identity lifecycle controls with continuous verification. The NIST Cybersecurity Framework 2.0 reinforces this direction through governance, protect, and detect functions, while NHI-specific guidance in the Ultimate Guide to NHIs emphasizes visibility, rotation, and offboarding as core controls. For critical infrastructure, that translates into:

• central inventory of service accounts, API keys, certificates, and workload identities
• owner assignment for every identity and secret
• short-lived credentials for privileged tasks instead of long-lived static secrets
• frequent recertification of access aligned to operational need
• logging that ties identity, action, and system impact together

Regulatory pressure also changes expectations for evidence. Supervisors increasingly want to see that exceptions are documented, that dormant access is removed, and that privileged pathways are monitored continuously. The same NHI research notes that only 20% of organisations have formal offboarding and API key revocation processes, which is exactly the kind of control gap that becomes visible during an incident review. These controls tend to break down in environments with legacy operational technology, shared vendor accounts, and fragmented asset ownership because identity state cannot be changed as quickly as the regulation expects.

Common Variations and Edge Cases

Tighter identity governance often increases operational overhead, requiring organisations to balance control strength against uptime, field maintenance, and vendor support constraints. That tradeoff is especially sharp in critical infrastructure, where some systems cannot tolerate frequent credential changes or interactive approval workflows. Best practice is evolving, but current guidance suggests documenting compensating controls rather than treating exceptions as permanent.

There is also a practical distinction between corporate IT and operational technology. An access model that works for office productivity systems may fail in a plant, substation, or transport control environment where shared sessions, remote maintenance, and embedded devices are common. In those cases, identity governance should be adapted to the asset class: session controls for admins, vaulting for secrets, and restricted break-glass access for emergencies. The CISA cyber threat advisories and ENISA Threat Landscape both reinforce that attackers routinely target identity pathways because they offer durable access across systems.

For organisations adopting more automation, the challenge is not only revocation but governance of machine decision-making. The strongest programs treat agentic or automated workloads as identities with scoped permissions, reviewable policy, and explicit expiry. Where that is not possible, current guidance suggests tighter compensating monitoring and rapid containment playbooks, because static controls lose effectiveness once identities are reused across multiple services, vendors, or operational domains.

Related resources from NHI Mgmt Group

• Why do critical infrastructure operators need stronger identity governance under SOCI?
• Why do critical infrastructure environments need stronger device identity governance?
• Why do critical infrastructure regulations force stronger access governance?
• How should security teams apply identity security to critical infrastructure resilience and compliance?