User access reviews certify whether a person should keep an entitlement. Token governance controls whether a machine credential should exist, how long it should live, what it can do, and when it must be revoked. The first is periodic and human-centred, the second must be runtime-aware and identity-specific.
How User Access Reviews and Token Governance Differ in Practice
user access review ask whether a named person still needs the access they already have. The control is retrospective and entitlement-focused, so the main question is whether the current human access remains justified. Token governance starts earlier and runs continuously: it governs issuance, scope, lifetime, rotation, and revocation of machine credentials before they become an access path.
The practical difference is that user reviews assume a person and a role or entitlement can be examined on a cycle, while token governance must account for a credential that may be active in code, pipelines, integrations, or workloads. That means the operational unit is different: one looks at access granted to an identity holder, the other at a credential that can independently authenticate and authorize a system action.
As a result, user access reviews are usually scheduled governance events, while token governance is lifecycle control plus runtime control. A token can be valid, over-scoped, long-lived, or untracked even when no person is actively reviewing it. For machine credentials, the risk profile changes if the token can outlive the original use case or be reused across environments, so governance has to cover visibility, expiry, rotation, and revocation as active controls. Access Reviews and Certification Guide explains why review campaigns work for entitlement certification, while token governance needs a different control rhythm.
Why the Control Objective Is Different
User access reviews are about certification, attestation, and exception cleanup. Their purpose is to confirm that a person’s access still matches job need, separation of duties, and least-privilege expectations. They are strongest when the main risk is entitlement creep, role drift, or dormant human access that should be removed. IAM and IGA Basics frames this as a governance process over access decisions, not a credential-lifecycle problem.
Token governance, by contrast, is about whether a credential should exist at all, how it is constrained, and how quickly it can be taken away. That includes token format, audience restriction, scopes, TTL, rotation policy, vaulting, and dependency mapping. NHI Lifecycle Management Guide is relevant because lifecycle handling is the control plane for tokens, secrets, and other machine credentials.
This is why the two controls should not be treated as synonyms. A clean access review can still leave behind a dangerous token if the credential was never inventoried, never expired, or never tied to an owner. Conversely, strong token governance does not eliminate the need for human access recertification, because people can still accumulate excessive entitlements even in a well-controlled environment. Joiner-Mover-Leaver (JML) Guide reinforces that identity lifecycle and credential lifecycle are related but not interchangeable.
What Changes Operationally for Practitioners
In practice, user access reviews rely on managers, app owners, or control owners answering whether a person still needs access. That process works best when the evidence is business context, role context, and approval history. Token governance needs different evidence: where the token lives, what system issued it, what it can reach, when it expires, and whether it is bound to a specific client, workload, or environment. Guide to the Secret Sprawl Challenge is useful because unmanaged tokens behave like hidden secrets, not like reviewed entitlements.
Practitioners also need to treat revocation differently. A person’s access can often wait for the next review cycle unless the risk is severe, but a compromised or unnecessary token should usually be revoked or rotated immediately. That makes token governance closer to continuous hygiene than periodic certification. Guide to NHI Rotation Challenges is relevant because short-lived, tightly governed credentials are far safer than long-lived ones that survive beyond their intended use.
Token governance also needs stronger technical guardrails than user review. Audience restriction, sender constraints, secret scanning, inventory, and environment segregation all reduce the chance that a token becomes a reusable bearer credential outside its intended context. Where a token can be replayed, copied, or reused across systems, governance has to assume compromise is plausible even without a human account takeover. RFC 9700: Best Current Practice for OAuth 2.0 Security and RFC 9449: OAuth 2.0 Demonstrating Proof of Possession (DPoP) both support that runtime-aware model.
Risk and Threat Considerations
Token governance carries a more immediate abuse risk than user access reviews because a token is a live credential, not just a reviewed permission record. If it is over-privileged, long-lived, or untracked, an attacker can reuse it directly for authenticated access, lateral movement, or data access without needing the original user to log in again.
Failure mechanism: The governance gap appears when a token is issued without tight scope, audience restriction, expiry, ownership, or revocation coverage, or when teams assume periodic access certification is enough to control machine credentials.
Impact: The token can outlive the business need, survive offboarding, and become a persistent access path that is much harder to detect than a human entitlement problem. In practice, the exposure is credential reuse, hidden persistence, and delayed containment.
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 addresses the attack and risk surface, while NIST SP 800-53 Rev 5 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Token governance depends on credential lifecycle, expiry, rotation, and revocation. |
| IA-9 — Service Identification and Authentication | Machine credentials authenticate systems and integrations, not human users. | |
| AC-6 — Least Privilege | Both access reviews and token scopes should minimize unnecessary access. | |
| Recommendation — Manage token issuance, rotation, storage, and revocation as controlled authenticators. Use service-authentication controls for non-human credentials and bound access paths. Limit entitlements and token scopes to the minimum access required. | ||
| CIS Controls v8 | CIS-5 — Account Management | Access reviews and token governance both rely on account and credential lifecycle control. |
| CIS-6 — Access Control Management | Token scope, revocation, and human entitlement control are access-governance functions. | |
| Recommendation — Review accounts and credentials regularly and remove stale access paths. Enforce access approvals, revocation, and privilege boundaries for users and tokens. | ||
| OWASP Non-Human Identity Top 10 | NHI-01 — Improper Offboarding | Tokens that survive after their owner or use case ends create persistent access risk. |
| NHI-05 — Overprivileged NHI | Token governance must control excessive scope and permissions for machine credentials. | |
| NHI-07 — Long-Lived Secrets | Long-lived tokens are a core governance failure mode for machine credentials. | |
| Recommendation — Revoke machine credentials when the owning workload, integration, or use case ends. Reduce token privileges to the smallest scope needed for runtime use. Replace long-lived tokens with short-lived credentials and enforced rotation. | ||
Practitioner Guidance
What to prioritise: Treat human entitlements and machine credentials as separate control populations. If you are building one review process for both, split it now, because the right evidence, owners, and remediation actions are different.
What to verify: For user access reviews, verify job role, manager attestation, and exception handling. For token governance, verify inventory, owner, scope, TTL, rotation path, and revocation path before trusting the credential.
Common mistake: Teams often mark the environment “reviewed” after finishing an access certification campaign, then leave stale tokens, API keys, or delegated credentials untouched. That creates a false sense of closure.
Practitioner takeaway: User access reviews answer “should this person still have access”, while token governance answers “should this credential still exist and still be usable”, and the second question must be enforced continuously, not just periodically.
Related resources from NHI Mgmt Group
- What is the difference between role-based access and API key governance for NHI security?
- What is the difference between RBAC and user access reviews in identity governance?
- What is the difference between attack surface management and NHI governance?
- What is the difference between reviewing human access and reviewing NHIs?