Introduction
The expansion of machine identity services alongside post-quantum preparation highlights how long-lived digital trust must be managed across changing technology cycles. Certificates and cryptographic keys underpin workloads, devices, services and applications, making them a major part of the non-human identity estate. Their security depends not only on stronger algorithms but also on disciplined lifecycle management.
The problem
Many organisations still treat machine credentials as technical artefacts rather than identities with owners and business impact. That creates familiar weaknesses: undocumented certificates, hard-to-rotate keys, inconsistent policy and emergency renewals. Post-quantum migration adds complexity because teams may need to support new cryptographic profiles while preserving interoperability across old and new systems.
What security teams should examine
Partners can help connect cryptographic inventory to operational identity governance
A certificate should be associated with the service or device it represents, the team responsible for it and the applications that depend on it.
Migration planning must be risk-based
Critical services with long replacement cycles, sensitive data or embedded credentials deserve priority over low-impact systems. Discovery should identify where cryptographic changes could interrupt machine-to-machine trust.
Automation is essential for scale
Policy-based issuance, renewal and revocation reduce outages and limit the use of long-lived credentials. They also create auditable evidence for security and compliance teams.
AI workloads increase the urgency
Agents and orchestration systems may create temporary identities dynamically, so NHI security programmes need controls that can issue narrowly scoped credentials and retire them when the task ends.