Source: Tenable Blog
Author: Christopher Day
URL: https://www.tenable.com/blog/why-a-cryptographic-inventory-is-key-for-addressing-the-quantum-computing-threat
ONE SENTENCE SUMMARY:
Quantum threats already endanger data via HNDL, requiring cryptographic inventories and phased post-quantum migration with continuous verification.
MAIN POINTS:
- Adversaries harvest encrypted traffic now to decrypt later using future quantum capabilities.
- Shor’s Algorithm will break RSA, ECC, and Diffie-Hellman on sufficiently powerful quantum computers.
- Symmetric crypto is more resilient; AES-256 remains strong despite Grover’s speedup.
- Primary risk concentrates in key exchange and digital signatures underpinning TLS, SSH, and PKI.
- Executive Order 14412 accelerates federal PQC timelines and elevates crypto weaknesses as vulnerabilities.
- FAR-directed contractor requirements will mandate NIST FIPS post-quantum standards by 2030.
- Cryptographic Bills of Materials (CBOMs) enable automated crypto asset discovery across dependencies.
- Global regulators converge on comprehensive cryptographic inventory as prerequisite for orderly migration.
- Recommended operational phases are discovery, prioritization, remediation with crypto-agility, and verification.
- Exposure-management integration can track TLS/SSH weaknesses, PQC adoption, and certificate configuration issues.
TAKEAWAYS:
- Treat post-quantum readiness as an immediate operational program, not a future-only upgrade.
- Build complete visibility of algorithms, protocols, and dependencies before planning migration work.
- Prioritize systems handling long-lived sensitive data most vulnerable to retrospective decryption.
- Implement hybrid and crypto-agile configurations to swap algorithms without recompiling when standards evolve.
- Enforce continuous scanning to prevent regressions back to quantum-vulnerable configurations after changes.