Topic starter
25/10/2026 11:10 am
TL;DR: Harvest-now, decrypt-later tactics make RSA-2048 a current concern because quantum attacks are growing more plausible, according to Fortanix. Cryptographic inventory and staged migration now shape how long-lived data, signatures, and certificates stay trustworthy.
Editorial analysis by NHI Mgmt Group, based on content published by Fortanix: “Why CISOs Should Prioritize Quantum-Safe Cryptography Today”.
Key questions
Q: Why does quantum risk matter before quantum computers can actually break RSA?
A: Quantum risk matters early because attackers can record encrypted traffic today and decrypt it later once enough quantum capability exists.
Q: When should organisations prioritise post-quantum migration work over waiting for final standards?
A: Organisations should begin planning now, even before every standard detail is final, because migration across certificates, validation software, and application ecosystems can take years.
Q: How should teams prioritise data for post-quantum cryptography migration?
A: Prioritise data by confidentiality lifetime, replaceability, and exposure spread.
Practitioner guidance
- Build a cryptographic inventory across all trust dependencies Catalogue where RSA, ECC, certificates, signing services, and key management live across applications, data stores, and infrastructure.
- Test hybrid post-quantum modes in controlled environments Run interoperability and performance tests before making any broad change to production trust paths.
- Prioritise long-lived data and signatures first Move the most sensitive and longest-retained data ahead of short-lived operational traffic.
Bottom line: Quantum-safe planning is about preserving trust in data, signatures, and certificates that must remain valid beyond the life of today’s algorithms.
Glossary terms: Quantum-safe encryption, Harvest now, decrypt later, Crypto-Agility, Cryptographic Inventory
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This topic was modified 7 days ago by NHI Mgmt Group
27/10/2026 7:16 pm
Crypto agility is now an identity governance problem, not just a cryptography problem. Certificates, trust chains, and federated authentication depend on algorithms that sit underneath IAM and machine identity programmes. When those algorithms age out, the issue becomes lifecycle control over trust itself, not a simple cipher swap. Practitioners should treat crypto inventory as part of identity governance and not as a back-end hygiene task.
A few things that frame the scale:
- Software supply chain attacks were projected to cost organisations $60 billion in 2025.
A question worth separating out:
A: Hybrid post-quantum cryptography combines a classical algorithm with a quantum-resistant one so systems can preserve compatibility while gaining forward security. A full replacement strategy removes the classical algorithm entirely and depends only on the newer scheme. Hybrid approaches are usually easier to deploy first, while full replacement demands broader ecosystem readiness and stronger assurance.
👉 Read our full editorial: Quantum-safe cryptography is becoming a CISO planning issue
This post was modified 7 days ago by NHI Mgmt Group