Teams should govern cryptographic material as an identity asset, not as a standalone technical control. That means assigning ownership, tracking every human and workload that can use it, enforcing rotation and revocation, and tying renewal to lifecycle processes. If the organisation cannot prove who can present or retrieve the material, the crypto control is incomplete.
Why This Matters for Security Teams
Cryptographic keys and certificates often look like plumbing until they become the identity layer that proves who or what is allowed to connect, sign, encrypt, or call an API. Security teams that treat them as isolated technical artefacts tend to lose track of ownership, renewal authority, and revocation paths. That creates blind spots across both human users and machine identities, especially when secrets are embedded in CI/CD, applications, and automation. The regulatory and audit perspective on NHIs shows why lifecycle evidence matters as much as the material itself.
This is not just a compliance problem. Expired certificates can stop services, while overlong-lived keys can quietly extend access long after an employee leaves or a workload is retired. Current guidance from the NIST Cybersecurity Framework 2.0 reinforces that identity and access governance should be measurable and continuous, not periodic. In practice, teams discover key sprawl only after an outage, an audit failure, or a compromise that should have been preventable.
How It Works in Practice
Effective governance starts by treating cryptographic material as an identity asset with a named owner, an expected purpose, and a defined lifecycle. That means mapping each key or certificate to the human approver, the workload or service account that uses it, the system that stores it, and the process that rotates or revokes it. For non-human identities, this also means deciding whether the credential is bound to a workload identity primitive such as SPIFFE, OIDC, or platform-managed certificates, rather than being copied into static configuration.
For human identities, the operational controls are simpler but no less important: issuance should be tied to employment status, role changes, and privileged access approvals. For machine identities, the bar is higher because access is often automated and high-volume. The best practice is to reduce long-lived static credentials and replace them with short-lived, purpose-bound material. That can include:
- Automated discovery of keys and certificates across cloud, endpoint, CI/CD, and application stores
- Lifecycle ownership that links issuance, renewal, rotation, and revocation to a specific team
- Just-in-time issuance for tasks that do not require persistent credentials
- Policy checks that block renewal when the identity or workload is no longer approved
- Logging that shows who requested, approved, retrieved, and used the material
NHIMG research on critical gaps in machine identity management shows how often this still breaks down: 57% of organisations lack a complete inventory of their machine identities, and 61% still rely on spreadsheets or manual tracking. That is why certificate governance should be embedded into the broader identity program, not delegated to infrastructure teams alone. A practical benchmark from the same research is that 45% of organisations cite certificate expiry as the leading cause of outages, which makes renewal automation a resilience issue, not merely a hygiene task.
These controls tend to break down in highly dynamic environments where workloads are created and destroyed faster than ownership records can be updated.
Common Variations and Edge Cases
Tighter certificate governance often increases operational overhead, requiring organisations to balance stronger assurance against deployment speed and support burden. That tradeoff becomes visible in environments with ephemeral containers, partner integrations, or legacy systems that cannot rotate credentials cleanly.
Current guidance suggests separating the policy for human identities from the policy for workloads, even when they share the same PKI. Human certificates usually follow HR and access-review processes, while machine certificates should follow workload lifecycle events, service mesh policy, or orchestration triggers. There is no universal standard for this yet, but the direction of travel is clear: shorter TTLs, more automation, and clearer ownership.
Edge cases also include shared certificates, embedded device keys, and third-party integrations. Shared material is especially risky because it obscures attribution and makes revocation overly broad. Third-party access deserves particular scrutiny because machine identity sprawl often extends beyond the enterprise boundary, and compromise can arrive through a partner system rather than an internal host. The Top 10 NHI Issues and the lifecycle processes for managing NHIs both reinforce the same operational point: if renewal, revocation, and ownership cannot be proven, the control is incomplete.
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 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 weak rotation and lifecycle control of non-human credentials. |
| NIST CSF 2.0 | PR.AC-1 | Identity proofing and access control cover who may use cryptographic material. |
| NIST Zero Trust (SP 800-207) | PR.AC-4 | Zero trust requires continuous verification of identity-bearing credentials. |
Automate issuance, rotation, and revocation for keys and certificates tied to NHIs.
