Yes, because both can carry standing access into sensitive systems. Human accounts and NHIs differ in form, but the governance problem is similar: credentials, privileges, and lifecycle events must be monitored continuously. The right model aligns review, rotation, and offboarding to the real risk window, not to the calendar.
Why a Shared Hygiene Model Makes Sense for Standing Access
Organisations should usually govern NHIs and human access with the same hygiene model at the lifecycle level because the core risk is the same: standing credentials can persist longer than intended and retain access to sensitive systems after their business need changes. The controls look different in execution, but the governance question is identical. NIST Cybersecurity Framework 2.0 is useful here because it emphasises governance, identity, and ongoing protection as connected responsibilities rather than separate checkboxes.
Where teams go wrong is assuming that human access can be reviewed on a schedule while NHIs can be left to engineering ownership. In practice, both create exposure when privilege outlives purpose, and both require a consistent standard for review, rotation, and removal. In practice, many security teams discover the need for the same hygiene model only after access has already outlived its approved use case.
Where the Model Should Be Shared and Where It Should Not
The shared model should cover inventory, ownership, approval, review cadence, credential rotation, and offboarding triggers. Those are the governance mechanics that matter most because they determine whether an identity is still fit for use. For both humans and NHIs, the question is whether access is still justified, whether the credential material is still valid, and whether the identity can be removed quickly when the job ends or changes.
The model should not be identical in operational detail. Human access often changes through joiner, mover, and leaver processes, while NHIs are more likely to depend on application deployment, automation pipelines, secrets stores, or certificate lifecycles. OWASP Non-Human Identity Top 10 is directly relevant because it focuses on the identity-specific failure modes that arise when machine identities are unmanaged, overprivileged, or poorly rotated. That distinction matters: the hygiene principle is shared, but the control implementation must match the identity type.
- Use one governance standard for ownership, review, and revocation.
- Apply identity-specific handling for secrets, tokens, certificates, and automation workflows.
- Tie recertification to actual usage, not just annual calendar cycles.
- Remove access based on lifecycle events, not on whether the account is human or machine.
This guidance breaks down when organisations treat NHIs as static infrastructure rather than identities with their own lifecycle and accountability requirements.
When a Single Hygiene Model Becomes Too Coarse
Stricter uniformity often improves visibility but increases administrative friction, so organisations have to balance consistency against operational reality. A single governance model works best at the policy layer, not as a one-size-fits-all operational template.
The main edge case is long-lived service access that is embedded in production dependencies. Those NHIs may need more frequent validation than human accounts, but they may also require controlled exceptions to avoid outages during rotation. Another edge case is privileged human access that is temporary yet highly sensitive, where time-bound approval and rapid revocation matter more than broad periodic review. The right answer is not to separate the governance principles, but to vary the control intensity by risk, blast radius, and dependency criticality.
NIST SP 800-53 Rev 5 Security and Privacy Controls is relevant where organisations need a control-oriented way to express those lifecycle expectations across account management, access enforcement, and monitoring. The open question is not whether humans and NHIs should be treated as the same asset, but whether the organisation can justify different handling without losing control of standing access.
Risk and Threat Considerations
Standing access creates a durable exposure path whether it belongs to a person or to a machine process. The material risk is privilege that remains valid after the original business need has changed, which increases the chance of unauthorised use, accidental misuse, or delayed removal after compromise.
Failure mechanism: The weakness usually appears when ownership is unclear, credentials are not rotated, or offboarding is not tied to actual lifecycle events. For NHIs, the same problem is amplified by automation, because tokens, API keys, and certificates are often embedded into workflows that continue to run even after the underlying purpose is obsolete.
Impact: Excessive or stale access can expose sensitive data, enable lateral movement, create ungovernable exceptions, and make incident containment slower because defenders cannot easily tell which identities are still legitimate.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and MITRE ATT&CK address the attack and risk surface, while NIST CSF 2.0 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV — Govern | Shared hygiene is a governance question about identity accountability and lifecycle control. |
| Recommendation — Define ownership, review cadence, and revocation responsibility for all identities. | ||
| OWASP Non-Human Identity Top 10 | NHI-01 — Secrets and Credential Management | NHIs depend on credential hygiene, rotation, and lifecycle control. |
| NHI-02 — Identity Lifecycle Management | The question centers on whether human and machine identities share lifecycle governance. | |
| Recommendation — Inventory and rotate NHI secrets before standing access becomes stale. Tie review and offboarding to lifecycle events, not calendar dates. | ||
| CIS Controls v8 | 5 — Account Management | Account hygiene depends on tracking, approving, and removing access paths. |
| Recommendation — Maintain an accurate account inventory and remove unused access promptly. | ||
| MITRE ATT&CK | T1098 — Account Manipulation | Stale or excessive standing access is a common abuse path after compromise. |
| Recommendation — Detect account changes that preserve or extend unauthorised access. | ||
Practitioner Guidance
What to prioritise: Start by aligning human and NHI governance around ownership, review, rotation, and deprovisioning triggers. If those four elements are inconsistent, the organisation does not have one hygiene model yet, only two different naming conventions for access risk.
What good looks like: The control state should show that every identity has a named owner, a current business purpose, a defined expiry or review trigger, and a removal path that works without manual ambiguity. The important test is whether the organisation can answer, quickly and with evidence, why a specific identity still needs access today.
Practitioner takeaway: Use the same governance logic for humans and NHIs, but do not confuse shared policy with shared mechanics; the model should be uniform in accountability and risk logic, yet different in how rotation, revocation, and dependency handling are executed.
Related resources from NHI Mgmt Group
- How should security teams govern non-human identities that have persistent access?
- What is the difference between reviewing human access and reviewing NHIs?
- What breaks when organisations try to govern all identities with the same access model?
- How should security teams govern non-human identities at scale?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 6, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
