TL;DR: Machine identity management has become a core security issue, according to GlobalSign, because organisations now rely on certificates, trust chains, and PKI to govern non-human access across infrastructure, applications, and connected systems. The underlying challenge is that identity programmes still treat machine trust as a static setup, even though renewal, revocation, and lifecycle control are now continuous operational requirements.
At a glance
What this is: GlobalSign argues that machine identity management has shifted from background hygiene to an operational priority because PKI, certificates and trust chains now govern production access.
Why it matters: For IAM, PAM and infrastructure teams, the message is that machine identities need lifecycle governance, not one-time setup, because revocation, renewal and trust validation are now operational controls.
Context
Machine identity management is the discipline of controlling certificates, trust chains and related lifecycle events for non-human access. In this post, GlobalSign frames that discipline as an operational priority because organisations now rely on machine credentials to secure infrastructure, applications and connected systems.
The governance gap is familiar to identity teams: machine trust is often treated as a static deployment choice, while in practice it behaves like a living identity estate. Renewal, revocation, certificate inventory and dependency mapping all need continuous control if certificate-based access is to remain trustworthy.
Key questions
Q: How should teams govern certificates as part of machine identity management?
A: Treat certificates as machine identities with owners, lifecycle states, and policy controls. Build inventory, automate renewal, enforce revocation, and connect certificate governance to IAM, secrets, and incident response so trust relationships are visible and manageable.
Q: What breaks when SSL certificate lifecycle management is not in place?
A: When certificate lifecycle management is weak, services can fail at expiry, trust chains can degrade silently and users may lose confidence in the site or application. The issue is not just a browser warning. It is a governance gap that leaves ownership, monitoring and renewal undefined, which turns certificates into hidden operational risk.
Q: Why do trust chains increase the operational impact of machine identity failures?
A: Because one issuer or validation dependency can affect many services at the same time. If teams do not know which systems rely on a given trust anchor, a single renewal, revocation or validation error can cascade across production.
Q: How do you know if PKI is actually improving identity security?
A: You know PKI is improving identity security when you can inventory certificates, prove key custody, and revoke trust quickly without breaking dependent services. If teams cannot answer where certificates live, who owns them, or how fast revocation propagates, PKI is providing assurance in theory but not in operations.
Technical breakdown
Why machine identity lifecycle control now matters
Machine identities are not just certificates on a server. They are the cryptographic proof that one workload, application or system is authorised to trust another, often without any human in the loop. Once those credentials are in production, their value depends on issuance, storage, renewal, revocation and replacement being governed as an identity lifecycle, not as an install-time task. That is why PKI is becoming an operational control plane rather than a back-office service. Practical implication: treat machine identity as a governed lifecycle with ownership, inventory and expiry handling, not as a one-time technical configuration.
Practical implication: build ownership, inventory and expiry handling into machine identity governance.
Trust chains and certificates as runtime access controls
A certificate does more than identify a system. It anchors trust through a chain that says which issuer is acceptable, which endpoint is authenticated and when the credential is no longer valid. In modern environments, that chain spans applications, APIs, internal services and external connections, so a weak link in issuance or validation can break production trust at scale. The operational question is not whether certificates exist, but whether the trust model is continuously enforceable across every dependency. Practical implication: map where certificate validation, chain trust and revocation checks are actually enforced in runtime paths.
Practical implication: map where certificate validation and revocation checks are enforced in runtime paths.
Why renewal and revocation are now governance issues
Short-lived certificates, automated renewal and rapid revocation are all responses to the same problem: machine credentials age, drift and outlive their intended trust boundary. When that lifecycle is not visible, teams end up with expired certificates, silent service failures or credentials that remain valid after the underlying relationship has changed. That makes lifecycle ownership a governance issue as much as a cryptographic one. Practical implication: align certificate lifecycle controls to service ownership and operational change management so trust can be removed as deliberately as it is granted.
Practical implication: align certificate lifecycle controls to service ownership and operational change management.
Breaches seen in the wild
- EmeraldWhale Git config credential theft: Tokens in exposed .git/config files let EMERALDWHALE clone private repositories and steal more than 15,000 cloud credentials.
- CI/CD pipeline exploitation case study: Credentials in an exposed .git/config let a researcher edit a Bitbucket pipeline so it planted their SSH key on the server. No victim was named.
Read and download The State of NHI & AI Agent Breach Report 2026, covering 200+ breaches impacting Non-Human Identities including AI Agents.
NHI Mgmt Group analysis
Machine identity has become a first-class governance domain, not a technical sidecar. The core shift in this article is that certificates and PKI now sit inside the production identity path, not outside it. That means machine trust inherits the same governance burdens as any other identity estate: ownership, lifecycle, assurance and dependency control. Practitioners should stop treating certificate management as a tooling task and treat it as identity governance for non-human access.
PKI is increasingly the control surface for machine trust, so lifecycle failure is governance failure. If renewal, revocation or validation is inconsistent, the organisation has not just a certificate problem but a trust problem. This is where machine identity governance meets operational resilience: access can fail when credentials expire, or persist when they should not. The implication is that certificate trust must be monitored as an enterprise control, not an isolated infrastructure function.
Trust chains create blast radius when they are not inventoried and owned. A single issuer, intermediate or validation assumption can affect many services at once, which is why machine identity sprawl matters even when no attacker is present. The governance lesson is that dependency visibility is part of identity control. Practitioners need to know which services rely on which trust anchors before an outage or compromise exposes the hidden coupling.
Operational priority means machine identity now belongs in the same programme conversations as PAM and IAM. The article’s direction is clear: if identity teams govern privileged human access but leave machine credentials to ad hoc administration, they are managing only part of the risk surface. Machine identity governance should be folded into change management, ownership models and service accountability. That is the practical path from PKI theory to resilient identity operations.
What this signals
Machine identity governance is converging with broader identity operations. When certificates and trust chains determine runtime access, teams need the same discipline they apply to other privileged identities: ownership, lifecycle visibility and revocation authority. The practical test is whether you can explain who owns each trust anchor before a change introduces drift.
Certificate lifecycle pressure turns PKI into a resilience issue as much as an authentication issue. Renewal failures and stale trust paths do not just weaken security, they can stop services or preserve access beyond their intended boundary. That is why machine identity planning now has to sit inside operational change processes, not beside them.
For practitioners
- Define machine identity ownership Assign a named owner for every certificate chain, issuer and workload credential so renewal and revocation are tied to service accountability, not infrastructure folklore.
- Inventory trust chains across production services Map where each application, API and workload depends on certificate validation, intermediate issuers and revocation checks so hidden coupling is visible before outages or policy changes.
- Automate renewal and revocation workflows Use event-driven lifecycle handling so certificates are replaced before expiry and removed promptly when services, vendors or environments change.
- Integrate PKI into change management Require certificate impact checks in deployment and infrastructure changes, especially where a new service depends on an existing trust anchor or validation path.
Key takeaways
- Machine identity management is no longer a background infrastructure task because certificates and trust chains now control real production access.
- The central risk is lifecycle drift, where renewal, revocation and validation are not governed with the same discipline as the services they support.
- Practitioners need ownership, inventory and change-aware controls so machine trust can be maintained and withdrawn deliberately.
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 and MITRE ATT&CK address the attack and risk surface, while NIST SP 800-53 Rev 5 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-05 — Overprivileged NHI | Persistent machine trust can expand access beyond the intended service boundary. |
| NHI-07 — Long-Lived Secrets | Certificate renewal and revocation failures leave machine credentials valid longer than intended. | |
| Recommendation — Review machine credential scope and remove privileges that exceed each service's actual trust requirement. Shorten credential lifetime and enforce expiry handling for every machine identity in production. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | IA-5 directly covers lifecycle handling for authenticators such as certificates and keys. |
| Recommendation — Apply IA-5 to govern issuance, renewal and revocation of machine authenticators. | ||
| MITRE ATT&CK | TA0006;TA0008 — Credential Access; Lateral Movement | Compromised or stale machine credentials can support credential abuse and spread across services. |
| Recommendation — Map certificate abuse paths to credential access and lateral movement techniques to prioritise monitoring. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | Machine identity trust is an authorisation problem when certificates grant runtime access. |
| Recommendation — Align machine identity governance with entitlement controls so trust is continuously authorised and reviewable. | ||
Key terms
- Machine Identity: The digital identity of a machine, device, or workload, such as a server, container, or VM, used to authenticate it within a network. Sometimes used interchangeably with NHI, though NHI is the broader category.
- Public Key Infrastructure: Public Key Infrastructure is the trust system that issues, manages, and revokes digital certificates used to prove identity. In practice it binds keys to entities and policies, making authentication, encryption, and non-repudiation possible across users, devices, and services.
- Certificate Lifecycle Management: The governance of digital certificates from issuance through renewal and revocation, ensuring certificates are valid, monitored, and rotated before expiry. Expired certificates are a leading cause of outages and unplanned security gaps.
- Trust Chain: The trust chain is the set of delegated relationships that lets one system, token, or integration act on behalf of another. In NHI security, it is often the real attack surface because compromise travels through legitimate permissions instead of obvious malware.
Deepen your knowledge
NHI governance, agentic AI identity, and machine identity security are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or NHI governance in your organisation, it is worth exploring.
Published by the NHIMG editorial team on July 12, 2026.
Updated on October 13, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org