tech · quantum risk
Is Crypto-agility program Quantum Proof? Cyber Program & PQC
Verdict
Crypto-agility is a program capability, not a product checkbox. Organizations that cannot change algorithms, cert profiles, or handshake stacks are not quantum-ready—even with pilot PQC elsewhere.
Overview
Crypto-agility means you can change cryptographic algorithms and parameters with manageable engineering cost when standards or threats shift.
It covers libraries, configs, certificates, tokens, HSMs, and vendor feature flags. Pair with hybrid TLS so migration is reversible.
Existing engineering guides on this site deepen code patterns; this page is the program framing for CISOs.
Program inventory focus: Hard-coded RSA/ECDSA paths that cannot change without multi-year rewrites. Typical classical surfaces: Pluggable algorithms; Certificate and protocol version agility. Cross-read /security/program and /assessment. Educational only—not compliance advice.
Cryptographic profile
- Signatures: Pluggable algorithms, Certificate and protocol version agility
- Hash: Config and policy versioning
- Public-key exposure: Hard-coded RSA/ECDSA paths that cannot change without multi-year rewrites.
What breaks
- Algorithms compiled into firmware with no update path
- Certificates pinned by exact SPKI forever
- No test environments for larger PQC keys
Mitigations
- Abstraction layers and config-driven suites
- Dual-stack / hybrid pilots
- Vendor contracts that require algorithm agility
FAQ
Is hybrid TLS crypto-agility?
Hybrid is a migration tactic; agility is the ongoing ability to change again.
Who owns crypto-agility?
Shared: security architecture sets policy; platform and app teams implement; vendors must cooperate.
Key concepts (technical dictionary)
Terms used on this page — open a definition: