Why Cryptographic Inventory Is the First Step Toward Quantum Readiness

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Post-quantum cryptography is often framed as an algorithm replacement exercise. The discussion usually moves quickly toward RSA, elliptic curve cryptography, ML KEM, digital signatures, hybrid key exchange and the question of which algorithms should replace today’s public key systems. For DevOps teams, however, selecting a replacement algorithm is only one part of the problem. The harder task is determining where vulnerable cryptography exists, which applications and infrastructure depend on it, who owns those dependencies, and how difficult each one will be to change. That makes cryptographic inventory one of the most important foundations of quantum readiness. NIST’s current Migration to Post Quantum Cryptography project specifically identifies cryptographic visibility and risk management as a core workstream and recommends building and maintaining a comprehensive cryptographic inventory to guide migration. The inventory covers algorithms, protocols, keys, certificates, applications, services, devices and data flows rather than treating certificates as the entire cryptographic landscape. For DevOps organizations, this distinction is particularly important because cryptography is distributed throughout the software delivery lifecycle. A developer can introduce a cryptographic dependency through a package, a CI pipeline can sign an artifact, a container can inherit a TLS library from its base image, Kubernetes can terminate TLS through an ingress controller, and a cloud service can manage encryption keys through a KMS or HSM. None of these dependencies necessarily appears …

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