The common mistake is treating certificates as one-time setup items instead of governed assets with issuance, renewal, rotation, and revocation requirements. When inventory is incomplete, stale certs linger and policy enforcement becomes inconsistent. That creates hidden trust debt across development teams and regions.
Why This Matters for Security Teams
Code signing is often treated as a release engineering task, but in practice it is a trust control that decides whether software is accepted by operating systems, app stores, CI pipelines, and downstream customers. If certificates are issued once and then forgotten, the organisation accumulates hidden trust debt: expired keys interrupt builds, leaked signing material can be abused, and inconsistent renewal practices create gaps between policy and reality. Current guidance in the OWASP Non-Human Identity Top 10 and the NIST Cybersecurity Framework 2.0 both point to lifecycle governance as a security outcome, not a paperwork exercise.
NHI Management Group’s research on NHI Lifecycle Management Guide and the Guide to NHI Rotation Challenges reinforces the same operational pattern: once trust material exists without a clear owner and retirement path, teams lose visibility faster than they lose functionality. In the 2025 State of NHIs and Secrets in Cybersecurity, Entro Security reported that 91% of former employee tokens remain active after offboarding, a reminder that lifecycle failures persist when revocation is not built into process. In practice, many security teams encounter signing abuse only after a certificate has already expired or been misused, rather than through intentional governance.
How It Works in Practice
Effective code signing lifecycle management starts with inventory, but not just a list of certificates. Security teams need to track the signing key, the certificate chain, where it is stored, which pipelines or release jobs can access it, who approves its use, and what event should trigger revocation. That is why the lifecycle belongs to both identity governance and release governance. The Guide to the Secret Sprawl Challenge is relevant here because signing keys behave like high-value secrets and become dangerous when duplicated across build systems, ticketing tools, and shared vaults.
Practically, teams should treat signing credentials as governed assets with these controls:
- Issue certificates only from approved sources with named ownership.
- Use short validity periods where the platform permits it, then rotate before expiry.
- Separate signing duties from general developer access through least privilege.
- Automate revocation when a project is retired, a team changes, or compromise is suspected.
- Monitor for unexpected use across regions, build agents, and release channels.
Where organisations need a baseline for policy structure, the Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs and the OWASP Non-Human Identity Top 10 are useful because they frame certificates and keys as identity artefacts with issuance, rotation, and termination requirements. These controls tend to break down in globally distributed CI/CD environments because certificate ownership, pipeline access, and revocation authority are often split across engineering, security, and platform teams.
Common Variations and Edge Cases
Tighter signing control often increases release friction, requiring organisations to balance integrity against deployment speed. That tradeoff is real, especially when a product portfolio includes legacy software, cross-border build farms, or vendor-managed release tooling. Best practice is evolving here: there is no universal standard for every signing workflow, so teams should document risk-based exceptions instead of allowing informal bypasses.
One common edge case is long-lived code signing certificates used to support older platforms that cannot tolerate frequent trust changes. Another is delegated signing, where a third-party build service or regional engineering team signs binaries on behalf of the product owner. In those cases, lifecycle management must extend to third-party access reviews, escrow rules, and break-glass procedures. NHI Management Group’s Ultimate Guide to NHIs — Regulatory and Audit Perspectives is useful for aligning evidence collection with audit expectations, while Top 10 NHI Issues highlights why shadow certificates and duplicated secrets keep reappearing. The practical rule is simple: if a team cannot answer who can sign, who can revoke, and how quickly compromise is contained, the lifecycle is not controlled.
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 | Covers weak rotation and lifecycle handling for signing credentials. |
| NIST CSF 2.0 | PR.AC-4 | Signing access must be limited to authorised pipelines and approved operators. |
| NIST CSF 2.0 | DE.CM-8 | Unexpected certificate use requires monitoring and anomaly detection. |
Track signing keys as NHIs and enforce issuance, rotation, and revocation on a fixed schedule.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 25, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
