What are ephemeral credentials?
By Identra · Updated
Ephemeral credentials are short-lived authentication secrets, such as tokens, certificates, or database passwords, issued on demand and expired automatically within minutes or hours. By removing pre-provisioned long-lived secrets, they shorten the usable exposure window of a compromised credential and remove manual rotation work for human, workload, and AI-agent access.
Key numbers
- 23.8 million secrets were leaked in public GitHub repositories in 2024, up 25% year over year (GitGuardian State of Secrets Sprawl, 2025)
- 70% of secrets leaked in 2022 were still valid and active in 2025 (GitGuardian State of Secrets Sprawl, 2025)
- Machine identities outnumber human identities 82 to 1 in the average enterprise (CyberArk Identity Security Landscape, 2025)
How do ephemeral credentials work?
Instead of handing an identity a permanent secret, an issuing service mints a fresh credential at the moment of access. The requester first proves who it is, typically through a platform-attested identity such as a cloud instance role, a Kubernetes service account, or an OIDC token from a CI pipeline. The issuer checks policy, then returns a credential scoped to the task and stamped with a time to live, often minutes.
When the TTL lapses, the credential is simply invalid. Expiry replaces most routine revocation and rotation work, and a copy that leaks into a log file or a repository is worthless once it lapses. What ephemeral issuance really removes is the pre-provisioned shared secret, and with it most of the usable exposure window. This flips the operational model of secrets management: the system of record stores policies about who may mint credentials, not the credentials themselves.
Why static credentials fail
Long-lived API keys, service account passwords, and hardcoded tokens accumulate faster than teams can track them. GitGuardian found 23.8 million secrets leaked in public GitHub repositories in 2024 alone, and 70% of the secrets it detected in 2022 were still active years later. A static credential that leaks does not just create an incident, it creates a standing liability that persists until someone finds and rotates it.
The scale problem compounds the exposure problem. With machine identities outnumbering humans 82 to 1 in the average enterprise, manual rotation cannot keep pace, and every unrotated key adds to secret sprawl. Ephemeral credentials attack both problems at once: there is no long-lived artifact to leak, and rotation is replaced by expiry.
What are the common forms of ephemeral credentials?
Most platforms already offer at least one ephemeral mechanism, even if teams still default to static API keys. Common implementations include:
- Cloud STS tokens: temporary credentials assumed from a role in AWS, Azure, or Google Cloud, expiring in minutes to hours
- Dynamic secrets: vault engines that create a unique database or message-queue account per request and delete it at lease expiry
- Short-lived certificates: X.509 or SSH certificates minted per session, so possession of an old certificate proves nothing
- Workload federation tokens: OIDC identity tokens that let a CI job or workload authenticate to a cloud provider without any stored secret
- Signed URLs and scoped session tokens: time-boxed grants to a single object or action rather than an entire service
How do ephemeral credentials relate to zero standing privileges?
Ephemeral credentials are the credential-layer half of a broader pattern. Just-in-time access grants permissions only when a task requires them, and zero standing privileges is the end state where no identity holds always-on access. Short-lived credentials make both practical: even if an entitlement is granted, the secret that exercises it evaporates on its own.
The combination also strengthens least privilege. Because each credential is minted per request, the issuer can scope it to the specific resource and operation in play, rather than reusing one broad key across every caller and code path.
What do ephemeral credentials not solve?
Short lifetimes shrink the abuse window, they do not close it. A stolen token is fully valid until it expires, and attackers automate fast; exfiltrating data with a 15-minute cloud token is routine. The issuing service also becomes concentrated risk: whoever compromises the vault, the identity provider, or the signing key can mint unlimited fresh credentials, so the issuance path needs the strongest controls in the NHI lifecycle.
Agentic systems raise the stakes further. An AI agent can request tokens far faster than any human, and a manipulated agent will present perfectly valid ephemeral credentials while doing the wrong thing. That is why issuance hygiene has to pair with runtime identity security: watching what an identity actually does with a credential, not just how long the credential lives.
How should teams adopt ephemeral credentials?
Most organizations migrate incrementally, starting where static secrets are most exposed:
- Inventory long-lived secrets first: you cannot replace credentials you have not found, so map keys, tokens, and service passwords across code, CI, and cloud
- Replace CI and workload secrets with federation: pipeline and workload credentials are the easiest wins because platforms attest their identity natively
- Move databases and internal services to dynamic secrets with short leases
- Set aggressive TTLs and measure them: an eight-hour token is better than a permanent key, but minutes beat hours
- Monitor issuance and usage: alert on unusual minting volume, scope requests, or use from unexpected locations, since expiry alone is not detection
How Identra thinks about it
Identra treats ephemeral credentials as necessary but not sufficient. Expiry removes the standing-secret problem, but every credential is fully trusted while it lives, and in an agentic environment tokens are minted continuously by non-human identities and AI agents acting on delegated authority. Identra's runtime view connects each short-lived credential to the identity that requested it, the delegation chain behind it, and the actions taken with it, so a valid token doing something abnormal is caught inside the TTL window rather than discovered after it.
Go deeper: The Non-Human Majority
Frequently asked questions
What is the difference between ephemeral credentials and credential rotation?
Rotation periodically replaces a long-lived secret that otherwise stays valid between rotations, often for weeks or months. Ephemeral credentials never have a long-lived form: each one is minted for a single task or session and expires on its own, so there is no rotation schedule to maintain and no stale copy left behind.
How long should an ephemeral credential live?
As short as the task allows. Cloud STS tokens commonly run 15 minutes to an hour, dynamic database leases minutes to hours, and per-session certificates about the length of a session. The right TTL is the shortest one that does not force constant re-authentication for the workload's actual access pattern.
Are ephemeral credentials the same as dynamic secrets?
Dynamic secrets are one implementation of the broader idea. A dynamic secrets engine creates a unique, short-lived account per request, typically for databases. Ephemeral credentials also include cloud STS tokens, short-lived certificates, workload federation tokens, and signed URLs, anything issued on demand with automatic expiry.
Can a stolen ephemeral credential still cause a breach?
Yes. The credential is fully valid until expiry, and automated attacks can exfiltrate data or escalate privileges within minutes. Short TTLs reduce exposure, but they must be paired with scoped permissions and runtime monitoring of what each credential is actually used to do.