TL;DR: Non-human identities now outnumber human users by 45 to 1 in the modern enterprise, with some organisations seeing ratios as high as 100 to 1, according to Oasis Security citing Rubrik Zero Labs, and that scale turns unmanaged secrets, excessive privilege, and weak ownership into a persistent attack surface. Governance has to move from human-centric IAM controls to machine identity lifecycle control.
At a glance
What this is: This analysis argues that non-human identities have become a major enterprise risk because they scale faster than human IAM processes and often retain unmanaged credentials, excessive privilege, and unclear ownership.
Why it matters: IAM, PAM, and NHI teams need to treat machine identity lifecycle control as a core governance problem because exposed secrets and standing access can bypass the assumptions built into human identity controls.
By the numbers:
- Non-human identities now outnumber human users by 45 to 1 in the modern enterprise.
- Some organisations are seeing ratios as high as 100 to 1.
Context
Non-human identity is the machine-readable access layer used by applications, services, workloads, and automation to reach other systems. The article's core point is that this layer is expanding faster than the governance models built for human users, leaving secrets, service accounts, and tokens under-managed.
That gap matters because NHIs are often created outside central IAM, reused across projects, and left active long after their original purpose ends. Once credentials become the only protection for a machine identity, weak ownership and long-lived access turn routine integrations into durable attack paths.
Key questions
Q: What breaks when non-human identities are governed like human users?
A: Lifecycle triggers, ownership, and review processes stop working because machine identities do not generate joiner, mover, or leaver events. Access can persist after the original purpose disappears, leaving valid credentials outside normal certification paths. That creates a blind spot where privileged access remains active even though nobody can clearly explain why it still exists.
Q: Why do long-lived service account secrets increase breach risk?
A: They extend the window in which a leaked or reused credential remains valid, so a single exposure can become persistent access. Without expiry, rotation discipline, and dependency mapping, the secret itself becomes the control point the attacker needs.
Q: How can organisations tell whether NHI governance is actually working?
A: NHI governance is working when every machine identity has an owner, a purpose, a minimum-necessary entitlement, and evidence of rotation and review. If teams can produce that chain without manual reconstruction, the programme is mature enough to withstand audit pressure. If they cannot, the governance model is still fragmented.
Q: What is the difference between human identity controls and NHI controls?
A: Human identity controls rely on interactive authentication, user challenge, and behavioural oversight. NHI controls must manage secrets, certificates, tokens, service accounts, and workload permissions at machine speed. The difference is operational: machine identities need lifecycle governance and runtime visibility, not just login protection.
Technical breakdown
What makes non-human identities different from human accounts?
Non-human identities are programmatic identities used by software, workloads, and services rather than people. They authenticate with API keys, service account secrets, certificates, tokens, or IAM roles, and they often operate at machine speed across cloud and hybrid environments. Unlike human accounts, they rarely have MFA, SSO, or interactive oversight, so the control model depends on inventory, credential lifecycle, and explicit ownership. When these identities are created by developers or embedded in automation, they can bypass the central governance processes that normally constrain human access.
Practical implication: Treat machine identities as governed assets, not implementation details, and make ownership and lifecycle tracking mandatory.
Why do long-lived secrets create persistent NHI risk?
A secret becomes a standing trust grant when it can authenticate without a second factor or a human approval loop. If that secret is reused, broadly scoped, or left without expiry, compromise does not create a one-time exposure window; it creates repeatable access until revocation. That is why long-lived credentials are so difficult to defend with human IAM patterns. Rotation helps only when teams know where the credential is used and can safely change it without breaking production.
Practical implication: Reduce standing exposure by shortening secret lifetime and mapping every dependency before rotation.
How do unmanaged NHIs distort IAM and IGA controls?
Traditional IAM and IGA assume an identifiable user, a manageable joiner-mover-leaver flow, and a review cycle that can certify or remove access later. NHIs break those assumptions when they are created in code, shared by multiple applications, or left outside formal ownership. The result is credential sprawl, uncertain purpose, and privilege that outlives the workload that needed it. In cloud and SaaS environments, that creates hidden access paths that standard human-focused review processes rarely surface.
Practical implication: Extend governance to service accounts, tokens, and workload identities so access reviews can include non-human subjects.
Threat narrative
Attacker objective: The attacker wants durable, low-friction access to enterprise systems by abusing machine credentials that were never designed for human-style oversight.
- Entry often begins when a secret, API key, or token is exposed through code, logs, storage, or third-party integrations.
- Once the credential is obtained, the attacker can abuse the standing privilege attached to the service account or workload identity without additional verification.
- That access can then be used to move across cloud services, data stores, or SaaS resources that the identity was trusted to reach.
- Impact follows when persistent access is used to steal data, alter systems, or maintain long-term footholds in production environments.
NHI Mgmt Group analysis
Identity governance for NHIs fails when organisations treat machine credentials as implementation artefacts rather than governed identities. The article describes a world in which service accounts, keys, tokens, and certificates are created by developers and automation, then left outside central ownership. That is not a minor visibility problem, it is a governance model mismatch. The practitioner conclusion is that NHI inventory and lifecycle control must be treated as first-class identity governance, not as an infrastructure side task.
Long-lived secrets are not just weak credentials, they are standing trust grants. When a token or key can authenticate indefinitely, the security question shifts from authentication strength to exposure duration and revocation discipline. The article's emphasis on secrets without expiration aligns with OWASP-NHI concerns around long-lived secrets and secret leakage. The practitioner conclusion is that reducing lifetime changes the attacker economics more than simply adding another review layer.
Access review processes assume access persists long enough to be certified; many NHIs are created, reused, and forgotten faster than that review cadence can see them. That assumption fails in cloud-native delivery where credentials are embedded in pipelines, applications, and shared services. The implication is not to make reviews more frequent, but to move governance earlier in the lifecycle and capture machine identity at issuance time.
Credential sprawl creates an identity blast radius that human IAM controls were never designed to contain. The article ties broad permissions, unclear ownership, and weak rotation together as a single exposure pattern, which means the problem is structural rather than isolated to one misconfigured secret. The practitioner conclusion is that blast-radius reduction, not isolated cleanup, has to become the governing objective for NHI programmes.
Non-human identity risk is now a board-level operational issue because scale changes the control economics. When NHIs outnumber humans by tens of times, manual governance cannot keep pace with creation, change, and decommissioning. The practical implication is that identity teams must design for machine-speed governance, or the control environment will always lag the environment it is supposed to protect.
From our research library:
- NHIs outnumber human identities by 25x to 50x in modern enterprises, according to the Ultimate Guide to NHIs.
- Read next: Ultimate Guide to NHIs — Key Challenges and Risks
What this signals
Ephemeral ownership is the missing control plane for machine identity governance. When a service account or token outlives the team that created it, accountability disappears even if the credential still works. Security programmes should treat owner drift as an exposure signal, not a documentation problem.
Non-human identity sprawl changes how Zero Trust is operationalised. Verification cannot stop at the user layer when APIs, workloads, and automation are the real access path. The next control boundary is issuance and revocation for machine credentials, not only session-time enforcement.
For practitioners
- Map every machine identity to an owner and purpose Build a current inventory of service accounts, API keys, tokens, certificates, and workload identities, then assign a named business owner and technical custodian for each one.
- Shorten credential lifetime wherever possible Replace long-lived secrets with short-lived credentials, and define explicit expiry or rotation expectations for every NHI that cannot be made ephemeral.
- Block unmanaged secrets from code and logs Scan repositories, CI logs, and deployment pipelines for exposed credentials, then revoke any secret that appears outside approved storage.
- Review privileges against actual service use Compare granted permissions with the systems each identity truly accesses, then remove broad entitlements that were added for convenience rather than necessity.
- Embed NHI governance into release workflows Require new machine identities to be registered, classified, and approved before they are deployed into applications, cloud services, or automation chains.
Key takeaways
- Non-human identities create a governance problem when machine credentials outnumber the human controls built to manage them.
- The article links NHI risk to three recurring conditions: long-lived secrets, excessive privilege, and weak ownership.
- Identity teams reduce exposure by inventorying machine identities, constraining credentials, and making lifecycle control explicit.
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 SP 800-53 Rev 5 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 — Secret Leakage | The article centers on exposed API keys, tokens, and secrets as the main NHI exposure path. |
| NHI-05 — Overprivileged NHI | Excessive permissions are a repeated risk in the article's discussion of service accounts and machine identities. | |
| NHI-07 — Long-Lived Secrets | Long-lived credentials are identified as a core reason NHI risk persists after deployment. | |
| Recommendation — Scan for leaked NHI secrets and revoke any exposed credential immediately. Reduce standing privilege on service accounts and workload identities to the minimum required scope. Replace long-lived secrets with expiring credentials and enforce rotation on a defined schedule. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Credential lifecycle and rotation are central to the article's risk model. |
| Recommendation — Apply authenticator management controls to inventory, rotate, and revoke non-human credentials. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | The article links NHI risk to excessive permissions and unclear authorization scope. |
| Recommendation — Review NHI permissions against actual use and remove entitlements that exceed task need. | ||
| MITRE ATT&CK | TA0006;TA0008 — Credential Access; Lateral Movement | The article describes exposed credentials enabling access and later movement across systems. |
| Recommendation — Map exposed NHI credentials to credential-access and lateral-movement detection coverage. | ||
Key terms
- Non-Human Identity (NHI): A digital identity assigned to a non-human entity such as a software application, service account, API key, bot, machine, or AI agent that enables it to authenticate and interact with systems without direct human involvement. NHIs now outnumber human identities in most enterprises by 25 to 50 times.
- Secrets Leakage: Secrets leakage is the exposure of credentials such as API keys, tokens, or certificates in places where they can be discovered and reused. The risk is not just disclosure, but unauthorized authentication that turns a coding or pipeline mistake into active access.
- Standing Privilege: Standing privilege is access that remains active even when no immediate task requires it. For NHI programmes, it is a common failure mode because long-lived credentials and persistent roles create unnecessary exposure. Reducing standing privilege usually means tighter expiry, on-demand access, and clearer review of who or what still needs access.
- Credential Lifecycle: Credential lifecycle is the process of issuing, rotating, expiring, and revoking secrets, certificates, and tokens across their usable life. For non-human identities, lifecycle discipline is the core control that separates temporary access from persistent exposure.
Deepen your knowledge
NHI governance, agentic AI identity, and machine identity security are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.
Published by the NHIMG editorial team on May 31, 2026.
Updated on October 6, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org