No. Human access reviews can work on periodic certification cycles, but non-human identities often change faster and need event-based review tied to deployment, rotation, or decommissioning. The better model is shared governance with different review mechanics, so the process matches how each identity class is created, used, and retired.
Why This Matters for Security Teams
Applying a single review cadence to both human and non-human identities sounds efficient, but it obscures how different these identity classes are in practice. Human access tends to be stable enough for periodic certification, while NHIs are often created by pipelines, tied to services, and retired on deployment or decommissioning events. NHI Mgmt Group notes that only 5.7% of organisations have full visibility into their service accounts, which makes generic review cycles especially weak for uncovering stale or over-privileged access in time. Ultimate Guide to NHIs and the OWASP Non-Human Identity Top 10 both point to lifecycle and visibility as core issues, not edge cases.
The real risk is not just missed recertification. Shared review templates can give teams a false sense of control while leaving active tokens, service accounts, and API keys untouched after code changes, vendor handoffs, or incident response. In practice, many security teams encounter NHI exposure only after a secret leak, a failed offboarding, or a post-incident audit rather than through intentional access certification.
How It Works in Practice
The practical answer is a shared governance model with different review mechanics. Human identities can stay on a periodic attestation cycle because their access patterns usually map to job function and manager approval. NHIs need event-based review tied to creation, deployment, privilege change, key rotation, secret storage changes, and decommissioning. That means access review is less about asking “does this account still belong to this person?” and more about asking “is this workload still present, still expected, and still operating within its approved scope?”
For NHIs, effective review usually combines inventory, ownership, and runtime evidence. Teams should validate where the identity exists, what it can reach, whether its secrets are stored and rotated correctly, and whether the workload is still active. NHI Mgmt Group’s Lifecycle Processes for Managing NHIs frames this as a lifecycle problem, not a calendar problem. That aligns with the broader guidance in the OWASP Non-Human Identity Top 10, which emphasizes reducing standing privilege, improving inventory, and treating secrets as ephemeral where possible.
- Trigger NHI reviews on deployment, rotation, and decommissioning events.
- Link each NHI to a business owner, service owner, or pipeline owner.
- Confirm scope, TTL, rotation status, and last-use evidence before renewal.
- Revoke immediately when the workload, integration, or vendor relationship ends.
Current guidance suggests that the strongest models use access review as part of continuous lifecycle governance rather than a standalone quarterly control. These controls tend to break down in environments with high CI/CD churn, unmanaged secrets in code, or vendor-managed integrations because the identity state changes faster than the review process can follow.
Common Variations and Edge Cases
Tighter NHI review often increases operational overhead, requiring organisations to balance stronger assurance against pipeline friction and owner fatigue. That tradeoff becomes especially visible in SaaS integrations, ephemeral containers, and machine-to-machine authentication where short-lived credentials may expire before a human reviewer could even complete an attestation.
There is no universal standard for this yet, but best practice is evolving toward differentiated review tiers. High-risk NHIs such as production API keys, privileged service accounts, and third-party integrations should get event-driven review plus automated control checks. Lower-risk, short-lived workloads may rely more on policy enforcement and telemetry than manual approval. For many teams, the right pattern is to use human-style certification only as a backstop for ownership and exception handling, not as the primary control for machine identities. The Key Challenges and Risks research shows why this matters: NHIs outnumber humans by a wide margin, so a human-centric review cadence quickly becomes unmanageable if applied unchanged.
In short, the question is not whether NHIs need review, but whether the review matches how the identity is created, used, rotated, and retired. In practice, organisations that keep one process for both classes usually miss NHI drift until secrets are already exposed or privileges have outlived the workload.
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 address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Identity inventory and ownership are essential before any review can be effective. |
| NIST CSF 2.0 | PR.AC-1 | Access authorisation should reflect identity class and business context, not one generic cadence. |
| NIST AI RMF | Governance requires lifecycle accountability for autonomous or machine-driven identities. |
Maintain a complete NHI inventory and verify owner, purpose, and lifecycle state before each review.
