Yes. Certificates need the same discipline as privileged credentials: ownership, storage restrictions, revocation triggers and auditability. The main difference is that certificate risk is often hidden inside a signing workflow, so the control failures are easier to miss until trust is challenged.
Why certificates belong in the same credential tier as secrets
digital signature certificates are not just “files that happen to sign things.” They are trust-bearing credentials that can authorize software release, document approval, code signing, and sometimes non-repudiation workflows. If a team treats them as lower-risk than passwords or API keys, the usual failure is not misuse by the holder, but silent trust expansion across systems that assume the certificate is legitimate.
That is why certificate handling should be governed with the same discipline as other high-risk credentials: clear ownership, defined storage boundaries, rotation or renewal triggers, and an auditable trail for issuance and revocation. For certificate lifecycle specifics, the Machine Identity, PKI and Certificate Lifecycle Guide is the closest internal analogue, and the CA/Browser Forum baseline requirements help explain why trusted certificates are managed as a lifecycle control, not a static artifact.
What makes certificate risk different from ordinary secret risk
The main difference is visibility. A leaked API key often looks like an obvious secret exposure, but certificate risk is frequently embedded inside signing tools, build pipelines, document workflows, or automation steps that people do not inspect as credential paths. The credential may be protected while the private key, signing endpoint, or delegated signer remains weakly governed.
That hidden placement changes how failures present. A certificate can remain technically valid while the organisation has lost track of who can use it, where the private key is stored, whether the signer is shared, or what event should force revocation. Teams that want a broader operational view should compare certificate handling with the general secret lifecycle patterns described in the Secrets Management Guide and the rotation challenges covered in the Guide to NHI Rotation Challenges.
How identity teams should operationalise certificate governance
Identity teams should place certificates under the same control questions they use for privileged credentials: who owns it, where is the key material stored, what system can use it, when does it expire, and what condition forces revocation. That means inventories, named owners, protected key storage, enforced renewal windows, and an explicit policy for compromised, misissued, or orphaned certificates.
At scale, the governance issue is not only expiry. It is dependency mapping: if a certificate is embedded in a signing workflow, renewal or revocation can break release pipelines, business documents, or service trust chains. Teams that need a concrete lifecycle model can use the Machine Identity, PKI and Certificate Lifecycle Guide alongside the RFC 8705: OAuth 2.0 Mutual-TLS Client Authentication and Certificate-Bound Access Tokens to see how certificates become part of enforced access rather than passive trust metadata.
Risk and Threat Considerations
Certificate risk becomes material when the private key, signing workflow, or trust chain is compromised, because the attacker does not need to “log in” in the normal sense. They can abuse the trust that the certificate already carries, and that can turn a narrow compromise into broad impersonation or fraudulent signing.
Failure mechanism: Weak storage, shared access, long-lived certificates, or unclear revocation ownership lets the certificate outlive the control that was supposed to bound it.
Impact: An attacker or insider can sign malicious code, forge trusted documents, impersonate a workload or service, or keep using a stale trust path after the organisation believes the credential has been retired.
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 addresses the attack and risk surface, while NIST SP 800-53 Rev 5 and NIST SP 800-57 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Certificates need lifecycle control, storage, rotation and revocation discipline. |
| IA-9 — Identification and Authentication (Non-Organizational Users) | Certificates often authenticate services, workloads or external actors in machine-to-machine trust. | |
| Recommendation — Manage certificate lifecycles, rotation and revocation as controlled authenticators. Apply certificate controls consistently where non-human or external actors authenticate. | ||
| NIST SP 800-57 | Key Management | Certificate risk depends on private-key generation, protection, rotation and destruction. |
| Recommendation — Set cryptoperiods, protect private keys and enforce key retirement on schedule. | ||
| OWASP Non-Human Identity Top 10 | NHI-02 — Secret Leakage | Certificate private keys and signing material can leak through workflows and repositories. |
| NHI-07 — Long-Lived Secrets | Long-lived certificates create extended trust windows similar to stale credentials. | |
| Recommendation — Scan for exposed signing keys and remove them from weak storage paths. Shorten certificate lifetimes and replace static trust with renewal controls. | ||
Practitioner Guidance
What to prioritise: Treat private keys and signing permissions as the control point, not just the certificate expiry date. If the signing action can create downstream trust, require named ownership, protected storage, and a documented revocation trigger.
What to verify: Confirm that certificates used for signing are inventoried separately from ordinary application secrets, and that someone can prove where the key lives, who can invoke it, and how revocation is executed when trust is challenged.
Common mistake: Teams often focus on renewal automation but forget the governance question of who is allowed to sign. A certificate that renews cleanly can still be high risk if its use is shared, opaque, or impossible to audit.
Practitioner takeaway: If a certificate can create trust, it should be governed like any other privileged credential, with stronger attention to hidden usage paths than to the artifact itself.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Free weekly newsletter
Subscribe to the NHI & AI Identity Journal
The latest on NHI and Agentic AI security – articles, research, breaches, news and events every week.
Bonus 33% off our NHI Course when you subscribe.
Reviewed and updated by the NHIMG editorial team on October 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org