Credentials used by applications, services, APIs, and system accounts rather than people. They include API keys, service account passwords, and related secrets that authenticate automated workloads. Because these credentials often run without direct user oversight, they need explicit lifecycle controls, rotation, inventory, and monitoring.
Expanded Definition
Non-human identity credentials are the secrets that let software act on its own identity, not a person’s. In practice, that includes API keys, service account passwords, client secrets, certificates, and tokens used by workloads, automation, integrations, and autonomous agents. They are distinct from human login credentials because they usually authenticate machine-to-machine access, often at scale, and they may be embedded in pipelines, configuration, or runtime environments.
The boundary matters: a credential is not the same thing as the identity it represents. A service account can exist without an active secret, and a secret can be valid even when no one can easily trace who owns it. That is why the subject is more operational than lexical. In NHI Management Group terms, the security problem is not just possession, but lifecycle control, discovery, and accountability. The OWASP Non-Human Identity Top 10 is useful here because it frames the identity and credential risks together, which is how practitioners actually encounter them.
Usage in the industry is still evolving around whether short-lived tokens, workload certificates, and delegated secrets should be discussed under one umbrella or separate control classes. The common misunderstanding is to treat all machine secrets as interchangeable. They are not. A static API key stored in a repo creates a very different control posture from a short-lived token issued by a federated system.
Examples and Use Cases
Non-human identity credentials show up anywhere automation needs to authenticate without a person logging in. They are most visible in systems that move data, trigger jobs, call APIs, or connect services across trust boundaries. The implementation tradeoff is simple but important: the more convenient the credential is for automation, the easier it is to overuse, copy, and forget.
- A CI/CD pipeline uses a deploy token to push artifacts into a registry and needs rotation when the build system changes.
- A serverless function authenticates to a database with a secret stored in a runtime vault rather than in code.
- An integration service uses an API key to call a third-party platform and requires inventory so the key owner is known.
- A batch job uses a service account certificate to access internal APIs and must be offboarded when the job is retired.
- An autonomous assistant uses scoped credentials to retrieve data or call tools, which makes access scope part of the control design.
For broader NHI lifecycle context, NHIMG’s Ultimate Guide to NHIs is a strong practitioner reference because it connects credentials to governance, rotation, visibility, and offboarding rather than treating them as isolated secrets.
Security Implications
When non-human identity credentials are unmanaged, the failure mode is usually persistence. A secret copied into code, logs, a config file, or a build artifact can remain valid long after the owner believes it has been retired. That expands blast radius because machine credentials often have broad access and are reused across environments.
NHIMG research shows why this matters operationally: 97% of NHIs carry excessive privileges, and 71% are not rotated within recommended time frames. That combination makes compromise durable. If a credential is leaked, attackers do not need a user to click a prompt or approve MFA, and access can be exercised automatically at machine speed. The result is often unauthorized API calls, lateral movement between services, data extraction, or abuse of trusted automation paths.
A practical warning sign is credential sprawl without ownership. If teams cannot answer where a secret lives, which workload uses it, and how it is revoked, the environment already has a control gap. NHIMG’s Guide to the Secret Sprawl Challenge is relevant because it describes the exposure pattern that makes these failures hard to contain.
Domain and Governance Relevance
In NHI governance, these credentials are the control surface. They define whether a workload is strongly owned, whether access is traceable, and whether revocation can happen fast enough to matter. The governance question is not simply “is the secret strong?” but “can the organisation inventory it, scope it, rotate it, and remove it when the workload changes?”
This is where machine identity changes the interpretation of credential management. Human access reviews are not enough because many NHI credentials live outside normal joiner-mover-leaver processes. Ownership can also be split across engineering, platform, and security teams, which creates gaps if no one is accountable for rotation or offboarding. NHIMG reports that only 20% of organisations have formal processes for offboarding and revoking API keys, which illustrates how often lifecycle governance lags behind deployment speed.
For practitioners, the term matters because it links secret handling to enterprise trust. Strong governance here supports Zero Trust assumptions, reduces hidden privilege, and makes automated access auditable rather than implicit.
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 CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 — Secrets and Credential Management | Machine secrets are the core asset this term describes. |
| NHI-03 — Identity Lifecycle and Ownership | The term depends on clear ownership and offboarding of machine credentials. | |
| NHI-06 — Visibility and Discovery | Hidden or orphaned machine secrets create the exposure this term warns about. | |
| Recommendation — Inventory, rotate, and revoke non-human credentials on a defined lifecycle. Assign owners for each credential and remove access when the workload ends. Continuously discover where non-human credentials exist across code, config, and runtime. | ||
| NIST CSF 2.0 | PR.AA-01 — Identity Management, Authentication, and Access Control | Machine credentials are an authentication and access-control subject. |
| Recommendation — Enforce least-privilege authentication for every automated workload credential. | ||
| CIS Controls v8 | 5.1 — Establish and Maintain an Inventory of Accounts | NHI credentials require account and secret inventory to stay governable. |
| Recommendation — Maintain an accurate inventory of service accounts and their associated secrets. | ||
Related resources from NHI Mgmt Group
- Non-Human Identity Lifecycle Management
- How do short-lived credentials change non-human identity risk?
- Why do attackers target non-human identity style access patterns when stealing credentials through phishing?
- Why do temporary credentials and ephemeral keys reduce risk in non-human identity access to cloud APIs?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 9, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
