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Non-human identity management is the process of discovering, assigning, securing, monitoring, and retiring the digital identities used by software, services, machines, and workloads. It governs both the identities that act and the credentials they use to authenticate or request access. Service accounts, workload identities, API keys, OAuth tokens, and secrets can all be part of that picture—but they are not interchangeable terms.
What counts as a non-human identity?
A non-human identity (NHI) is a digital identity associated with an actor that is not a person. That actor might be a physical device, an application, a service, an automated process, or a workload running in a cloud environment. The U.S. General Services Administration and Federal CIO Council’s Cloud Identity Playbook, version 1.3, dated March 17, 2026, defines a non-person entity as “Any non-human with a digital identity in cyberspace.”
That broad definition is useful, but there is no single naming scheme used identically across every cloud, identity platform, and organization. A practical NHI program therefore needs its own consistent inventory and taxonomy, mapped to the terms used by its platforms.
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| Term | What it refers to | Example or distinction |
|---|---|---|
| Non-human identity | The broad category of digital identities for non-human actors. | May represent hardware, software, a service, or a workload. |
| Machine identity | In the federal playbook’s terminology, a digital identity for physical hardware. | A server, network switch, or printer. |
| Digital worker identity | The federal playbook’s category for software identities. | AI or machine-learning software, bots, programs, and services. |
| Workload identity | An identity used by an application, workload, operational tool, or component when requesting access to a service or resource. | A workload identity identifies the running software actor; AWS uses “machine identity” for applications, operational tools, and components making requests to AWS services. |
| Service account | A platform-specific account or principal used by an application, service, or process. | One way to represent a non-human actor, not a synonym for every NHI or machine identity. |
| Token, key, or secret | A credential used in an authentication or authorization flow. | It may be presented by an identity, but it is not the identity itself. A platform’s exact boundaries and terminology can vary. |
This is a practical model rather than a universal standards taxonomy. For example, an application may have a service account, run as a workload, and use a token issued for a particular access request. An inventory that records only the secret or key can miss the owner, purpose, and software actor behind it.
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What does non-human identity management cover?
NHI management applies lifecycle governance to identities and the credentials associated with them. The goal is to know what exists, why it exists, what it can access, who is accountable for it, and how to change or end that access safely.
- Discovery and inventory: Find identities across cloud accounts, applications, infrastructure, and deployment pipelines.
- Ownership and purpose: Record an accountable team or owner and the business or technical purpose for each identity.
- Access control: Limit permissions to the resources and actions required for the identity’s task.
- Credential lifecycle: Issue and protect credentials, set appropriate lifetimes, and provide a way to rotate or revoke them.
- Visibility: Log and review identity use so that access can be audited and unexpected activity investigated.
- Retirement: Remove credentials and permissions when an application, workload, or process no longer needs them.
These controls are related but not identical. Rotating a key does not by itself reduce the permissions attached to an identity; reducing permissions does not establish who owns it; and an inventory is incomplete if it cannot be connected to actual credential use.
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Why are service accounts and credentials a security concern?
Non-human identities often need automated access to systems without a person signing in for each action. That makes them essential to software operations, but it also makes clear ownership, narrow permissions, credential protection, and revocation important. An unmanaged identity can remain in use after its original purpose or owner has disappeared, while a credential that is exposed or retained longer than necessary may continue to provide access.
Cloud responsibility is shared. The federal Cloud Identity Playbook emphasizes that customer organizations remain responsible for identity and access management, least privilege, role-based access, MFA, and risk decisions in cloud environments. The playbook’s stated scope centers on federal cloud workforce ICAM, so its definitions and shared-responsibility lessons are useful beyond that context but should not be mistaken for a universal mandate.
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Cloud Security Alliance (CSA) findings illustrate governance concerns, not actual breach prevalence. Its online survey, conducted in June 2024 with 818 IT and security professionals and summarized on September 11, 2024, reported the following self-described responses:
| CSA survey finding | Reported result |
|---|---|
| Respondents who felt highly confident in preventing NHI attacks | 15% |
| Respondents who expressed concern about NHI attacks | 69% |
| Organizations reporting formal API-key offboarding and revocation processes | 20% |
CSA also reported that even fewer organizations had procedures for rotating API keys. These are survey findings from the stated respondent group, not universal estimates or measurements of breach rates.
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How should an organization govern non-human identities?
A workable program connects each identity to an owner and a purpose, then applies access and credential controls throughout its life. The steps below are a general operating sequence; exact implementation depends on the identity platform and workload architecture.
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- Discover identities and credentials. Inventory service accounts, workload identities, API keys, OAuth tokens, secrets, and other machine access across cloud accounts, applications, infrastructure, and pipelines. Map credentials to the actors and systems that use them where possible.
- Assign an owner and purpose. Record the responsible team, what the identity supports, which environments it operates in, and what access it needs. Treat an identity with no accountable owner or current purpose as an item to investigate rather than as an acceptable permanent exception.
- Scope permissions to the task. Grant only the actions and resources required for the workload. Review role assignments and access when the workload changes, rather than assuming that the original permissions remain appropriate.
- Select an authentication pattern and credential lifetime. Prefer temporary or short-lived credentials when the platform and workload support them. Where a static credential is necessary, control where it is stored, who or what can retrieve it, how it is rotated, and how it can be revoked.
- Protect keys and tokens. Control access to signing keys and secret material, validate tokens according to the applicable platform and protocol, and avoid treating possession of a credential as proof that its permissions are still appropriate.
- Monitor use. Capture identity activity in logs that can be reviewed and associated with the relevant workload or owner. Use that visibility to investigate unexpected access and to check whether credentials remain in use.
- Test rotation, revocation, and retirement. Establish how to replace or disable credentials, remove access, and retire identities without leaving orphaned access behind. Test recovery and service continuity as part of the procedure.
NIST’s final IR 8587, published in September 2026, provides implementation recommendations for agencies and cloud service providers on token and assertion protection. Its coverage includes key management, token verification, and lifecycle controls for single sign-on, federation, API access, and workload access. NIST’s September 15, 2026 announcement highlights workload identity considerations and favors short-lived tokens over reliance on static credentials and secrets.
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How do short-lived credentials, federation, and static keys compare?
There is no universally best pattern for every environment. Compare the options against credential lifetime and revocability, permission scope, platform coverage, audit visibility, deployment-tool integration, and operational recovery. The table summarizes broad trade-offs; it is not a vendor ranking.
| Pattern | What to evaluate | Operational consideration |
|---|---|---|
| Short-lived or temporary credentials | How credentials are issued, how long they remain valid, and whether the workload can renew them safely. | Reduces dependence on credentials that persist indefinitely, but requires a reliable issuance and renewal flow. |
| Federated access or scoped workload roles | Whether the workload can establish a trusted identity and receive only the access needed for its task. | Check compatibility with the workload and deployment systems, and verify that identity use is visible in audit logs. |
| Long-lived static credentials, such as API keys | Where the credential is stored, who can access it, its permissions, and the process for rotation and revocation. | Requires explicit protection and lifecycle procedures; a credential can outlast its original purpose if it is not tracked and retired. |
AWS documents temporary, limited-privilege credentials for programmatic access and describes machine-to-machine token and role-session patterns. These are AWS implementation examples, not evidence that one pattern or provider is superior across clouds. NIST’s token recommendations provide a broader federal and cloud-provider implementation reference.
What should teams measure and review?
Useful review questions focus on whether the inventory and controls work in practice, rather than only whether a policy exists:
- Can the team identify the owner and current purpose of each non-human identity?
- Can it map each credential to the workload or service that uses it?
- Are permissions limited to the identity’s required resources and actions?
- Are credential lifetimes, storage, rotation, and revocation appropriate to the access pattern?
- Can an operator see when an identity is used and investigate activity that does not fit its expected role?
- Can access be removed when a workload is changed or retired, without leaving credentials behind?
These checks also help expose where the organization’s taxonomy does not match platform terminology. Maintain one internal view of the actor, account or principal, credential, owner, permissions, and lifecycle status even when different systems label those elements differently.
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