Because production access paths now cross actor types. A user may trigger a workflow that uses a service account or an AI agent, and the governance failure often occurs at the handoff. If those identities are managed separately, accountability, certification, and offboarding become incomplete.
Why identity platforms need both human and non-human coverage
Identity is no longer a person-only boundary. Modern access paths often begin with a human and end with a machine, or the reverse, so the platform has to understand both the actor and the delegated runtime that actually touches systems. The practical issue is continuity: if one side is governed and the other is not, review, certification, and offboarding become partial.
Where the governance break actually happens
The failure point is usually not the login itself, but the handoff. A person may approve, trigger, or delegate an action that is then executed by a service account, workload identity, or agent. Human vs Non-Human Identity is the clearest reference point for understanding how ownership, lifecycle, and authentication have to follow that chain rather than stop at the user account.
That is why separate tools or separate governance processes often leave blind spots. If the platform only sees employees, it misses the identities that actually consume APIs, sign artifacts, call cloud services, or keep automations alive after the initiator has changed roles or left. If it only sees machine identities, it misses who approved the access and who remains accountable for it.
Convergence matters because the control objective is not just to know who signed in, but to know which identity path is active, who owns it, what it can reach, and how it will be retired. NHIMG’s Identity Convergence Guide covers the operational value of a single view across workforce, privileged, customer, NHI, and AI agent identity.
What good coverage has to include
A platform that truly covers both populations needs to handle lifecycle and governance across the full chain. That includes proofing and authentication for people, but also discovery, ownership, rotation, review, and offboarding for non-human access that may outlive the person who created it. IAM and IGA Basics is useful here because it ties authentication, authorization, provisioning, entitlement review, and joiner-mover-leaver processes into one operating model.
For the non-human side, the platform also has to understand credential-bearing assets, not just accounts. Service accounts, API keys, tokens, certificates, and workload identities each behave differently, so offboarding or recertification cannot be a single generic step. NHIMG’s NHI Lifecycle Management Guide and Service Account Security Guide both reinforce that lifecycle control has to follow the actual credential and ownership model.
Authentication also has to be differentiated. Human authentication is usually centered on user assurance and session control, while machine authentication often depends on key material, federated trust, or certificate-based exchange. NHI Authentication Guide is relevant because it shows why workload and agent access need their own authentication patterns instead of being forced into a user-centric model.
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 OWASP Agentic AI Top 10 address the attack and risk surface, while NIST SP 800-53 Rev 5 sets the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Covers lifecycle control for credentials used by people and non-human actors. |
| IA-9 — Service Identification and Authentication | Directly addresses service, workload, and agent authentication in cross-actor access paths. | |
| AC-2 — Account Management | Supports unified account lifecycle, ownership, and offboarding across actor types. | |
| Recommendation — Manage authenticator issuance, rotation, and revocation across human and machine access paths. Apply IA-9 to authenticate non-human identities that execute delegated access. Use AC-2 to inventory, govern, and disable both user and non-user accounts. | ||
| OWASP Non-Human Identity Top 10 | NHI-01 — Improper Offboarding | The question centers on retiring access when human and non-human paths overlap. |
| NHI-10 — Human Use of NHI | Human-triggered workflows that rely on machine access are part of the issue asked about. | |
| Recommendation — Ensure offboarding removes the downstream non-human access created by a human workflow. Prevent people from bypassing governance by using non-human access as a shadow path. | ||
| OWASP Agentic AI Top 10 | ASI03 — Identity & Privilege Abuse | Relevant when AI agents or delegated automations inherit privilege from human actions. |
| ASI02 — Tool Misuse | Cross-actor access often ends in tool execution by an agent or automation. | |
| Recommendation — Constrain delegated agent privilege so human approvals do not become unbounded execution. Limit tool access to approved actions and monitor delegated execution paths. | ||
Practitioner Guidance
What to prioritise: Start by mapping the handoff points where a human action results in non-human execution, because those are the places where ownership and accountability most often fragment. If the platform cannot show who approved, which non-human identity executed, and when that access expires, the control model is incomplete.
What to verify: Confirm that recertification, offboarding, and exception handling cover both sides of the relationship. A strong test is whether you can remove the person and still identify every downstream service account, token, or agent that remains active because of that person’s decision.
Common mistake: Treating “workforce IAM” and “machine identity” as separate programmes with separate records. That split tends to preserve local optimisations while hiding the true blast radius of access.
Practitioner takeaway: The right question is not whether humans and non-humans can be managed in different tools, but whether the organisation can trace, certify, and retire access across the full path of delegated authority.
Related resources from NHI Mgmt Group
- How should security teams run access reviews for non-human identities?
- How should security teams govern non-human identities that have persistent access?
- How should security teams evaluate identity platforms that cover both human and non-human identities?
- Who should be accountable for risky non-human identity access when automation spans multiple platforms?