Security teams should govern secrets as the credential layer that makes zero trust enforceable. That means inventorying every secret type, shortening lifetimes where possible, separating human and machine patterns, and revoking credentials when the trust relationship changes. If the secret remains static and reusable, zero trust becomes a policy statement rather than an access control model.
Why This Matters for Security Teams
zero trust depends on continuously verified identity, not on secrets that can be copied, reused, and forgotten. In practice, that makes secrets governance a control-plane problem: if API keys, tokens, certificates, and service passwords outlive the trust context that created them, the environment quietly reverts to implicit trust. The problem is not only leakage; it is also overreach, stale access, and poor revocation hygiene.
That is why guidance from NIST Cybersecurity Framework 2.0 and NIST SP 800-207 Zero Trust Architecture should be read together with NHIMG’s Guide to the Secret Sprawl Challenge. The operational lesson is simple: inventory alone does not enforce zero trust unless the lifecycle is tied to authentication, authorisation, and revocation. In practice, many security teams discover their weakest secrets only after a token has already been reused across systems, rather than through intentional lifecycle control.
How It Works in Practice
Govern secrets as short-lived, purpose-bound credentials rather than as permanent access artifacts. For human access, that usually means vault-backed issuance with strong approval, JIT activation, and rapid expiry. For machine access, the better pattern is workload identity plus ephemeral credential exchange, so the application proves what it is at runtime instead of carrying a reusable secret indefinitely. NHIMG’s Ultimate Guide to NHIs — Static vs Dynamic Secrets and Guide to SPIFFE and SPIRE are useful references for this shift.
A practical zero trust secrets program typically includes:
- Central inventory of every secret type, location, owner, and expiry.
- Automated rotation for static secrets that cannot yet be eliminated.
- Ephemeral delivery to workloads using workload identity, not embedded credentials.
- Policy checks at request time, with approval based on context and purpose.
- Immediate revocation when ownership, environment, or trust boundary changes.
This aligns with the spirit of the OWASP Non-Human Identity Top 10, because the secret is only one part of the identity story; the real control is whether the credential can be bound to a verified workload and retired cleanly. Current guidance suggests using static secrets only where external systems or legacy protocols make replacement impractical. These controls tend to break down when secrets are embedded in CI/CD runners, containers, or shared automation because the credential can be copied faster than the environment can rotate it.
Common Variations and Edge Cases
Tighter secrets control often increases operational overhead, so organisations have to balance revocation speed and coverage against delivery friction. That tradeoff is especially visible in legacy estates, third-party integrations, and emergency access paths, where there is no universal standard for this yet and static credentials may remain unavoidable for a time.
One common exception is certificate-heavy infrastructure. Certificates can still fit zero trust, but only if expiry, renewal, and private key protection are automated; otherwise they become long-lived secrets with a different label. Another edge case is shared service accounts, where teams sometimes keep one credential across multiple apps for convenience. That pattern weakens attribution and makes revocation ambiguous, so best practice is evolving toward per-service identity and narrowly scoped secrets. NHIMG’s Shai Hulud npm malware campaign and the Reviewdog GitHub Action supply chain attack both illustrate why exposure windows matter as much as detection. In environments with broad automation, secrets governance fails most often when revocation depends on manual ticketing after deployment rather than on policy-driven expiry and immediate invalidation.
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 AI RMF and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Addresses secret rotation and lifecycle control for non-human identities. |
| NIST AI RMF | Supports governance of credential risk and operational accountability in AI-enabled environments. | |
| NIST Zero Trust (SP 800-207) | 3.1 | Zero trust requires continuous verification of identity and access context. |
Replace reusable secrets with short-lived issuance and automate rotation, expiry, and revocation.
Related resources from NHI Mgmt Group
- How should security teams implement adaptive MFA in Zero Trust environments?
- How should security teams use PKI to support Zero Trust in mixed human and machine environments?
- How should teams govern zero trust access in self-hosted environments?
- How should security teams govern machine identities in zero trust environments?
