Measure how many certificates have named owners, how many renewals are handled without manual intervention, and how many exceptions remain open past policy thresholds. If the inventory is still incomplete, automation is only accelerating the same blind spots.
Why This Matters for Security Teams
Certificate automation is often sold as a governance win, but automation only improves control when ownership, policy, and exception handling are measurable. Without those signals, teams can renew certificates faster while leaving unknown issuers, stale accounts, and undocumented dependencies untouched. That is why machine identity programs need the same discipline applied to human access, not just more automation.
NHI Management Group research shows the scale of the problem: only 38% of organisations have automated certificate lifecycle management, while 57% still lack a complete inventory of their machine identities in The Critical Gaps in Machine Identity Management report. When inventory is incomplete, renewal automation can mask exposure instead of reducing it. The same pattern appears in broader NHI governance, where the State of Non-Human Identity Security highlights how visibility gaps persist even as organisations invest in tooling.
Security teams should therefore judge automation by control quality, not task volume. The practical question is whether the process can prove who owns each certificate, whether renewal happens within policy, and whether exceptions are tracked to closure. In practice, many security teams discover governance failure only after an outage, audit finding, or expired certificate has already exposed the gap.
How It Works in Practice
Teams usually need a simple control model: inventory, ownership, renewal path, and exception management. That means every certificate should be tied to a named service owner, a business or technical purpose, and a defined renewal policy. If automation is working, renewals should happen through a repeatable workflow with minimal manual intervention, but the workflow still needs audit evidence. NIST’s Cybersecurity Framework 2.0 is useful here because it frames governance as an ongoing manage and protect activity, not a one-time deployment.
In practice, teams should measure a small set of indicators:
- percentage of certificates with assigned owners and service context
- percentage of renewals completed automatically versus manually
- number of certificates with exceptions, and how long those exceptions remain open
- number of failed renewals, near-expiry events, and resulting service disruptions
- percentage of certificates discovered outside the authoritative inventory
These measures tell a different story than raw automation coverage. A high automation rate can still coexist with weak governance if no one can explain why a certificate exists, who approved it, or whether it is still needed. That is why lifecycle guidance in Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs matters: renewal is only one stage in a broader identity lifecycle. Teams also need to track exception ageing, because long-lived waivers often become the real control failure. These controls tend to break down in hybrid environments with shadow IT, unmanaged appliances, and service accounts that no longer map cleanly to an application owner.
Common Variations and Edge Cases
Tighter certificate governance often increases operational overhead, requiring organisations to balance automation speed against auditability and service continuity. That tradeoff is especially sharp when legacy systems cannot support short-lived certificates, automated trust anchors, or standard renewal APIs. Current guidance suggests treating those systems as exceptions with explicit compensating controls rather than letting them define the baseline.
Another edge case is delegated ownership. Some certificates are issued by platform teams but used by application teams, which creates ownership ambiguity unless the policy requires a single accountable party. This is where renewal metrics alone can mislead: a certificate may renew automatically and still lack a valid business owner. The Top 10 NHI Issues emphasises that visibility and lifecycle discipline are recurring weak points, not isolated process defects.
For audits and governance reviews, teams should treat open exceptions as a time-bounded risk register, not a permanent workaround. Best practice is evolving on how to score certificate governance maturity, but a defensible approach is to ask whether the program can produce evidence of ownership, timeliness, and closure. If it cannot, automation is improving throughput more than governance.
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 NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Certificate automation is weak when rotation and lifecycle control are not measured. |
| NIST CSF 2.0 | GV.RM-01 | Governance requires measurable risk decisions, not just automated renewals. |
| NIST CSF 2.0 | PR.AA-01 | Ownership and authorization evidence are central to certificate governance. |
Track certificate ownership, rotation, and expiry to verify automation reduces NHI risk.
Related resources from NHI Mgmt Group
- How do identity teams know if access management is actually improving governance?
- How do organisations know whether identity automation is actually improving control?
- How do security teams know whether machine identity governance is actually working?
- How do organisations know whether certificate readiness is actually improving?
