The Post-Quantum Cryptography Roadmap | CRYPTAS

A practical, European roadmap for moving your organisation to quantum-safe cryptography — before the deadline finds you unprepared.

Quantum computing promises extraordinary breakthroughs in science and industry. It also threatens the public-key cryptography that protects almost every digital interaction today. A sufficiently powerful quantum computer could break the RSA and elliptic-curve algorithms underpinning TLS, digital signatures, VPNs and code signing. The reassuring news is that the migration path is now clear. The uncomfortable news is that it has already begun.

Why the clock is already ticking

You do not need a quantum computer to exist today to be at risk today. Adversaries are already harvesting encrypted data in the expectation of decrypting it once the hardware matures — the so-called “harvest now, decrypt later” attack. Any information that must stay confidential for a decade or more — health records, financial data, government secrets, intellectual property — is effectively exposed the moment it crosses the wire. For long-lived data, the quantum threat is a present-day problem, not a future one.

What changed in 2024

In August 2024, NIST finalised the first post-quantum cryptography standards: FIPS 203 (ML-KEM) for key encapsulation, FIPS 204 (ML-DSA) and FIPS 205 (SLH-DSA) for digital signatures. For the first time, organisations have approved, standardised algorithms to migrate to. Europe is moving in step: Germany’s BSI recommends hybrid deployments that combine classical and post-quantum algorithms, and has signalled that the sole use of classical asymmetric key-exchange should be phased out by the end of 2031. The standards exist; the question is no longer whether to migrate, but how quickly and in what order.

Building your roadmap: five steps

• Discover and inventory your cryptography. You cannot protect what you cannot see. Build a complete inventory of where cryptographic keys, certificates and algorithms are used across applications, infrastructure and third-party services.
• Prioritise by risk and data lifetime. Rank systems by the sensitivity and shelf-life of the data they protect. Long-lived secrets and externally exposed systems move first.
• Engineer for crypto-agility. Design systems so algorithms can be swapped without re-architecting. Crypto-agility is the single most valuable capability you can build now — it future-proofs you against the next transition, not just this one.
• Adopt hybrid first. Deploy post-quantum algorithms alongside classical ones, as the BSI advises, so you gain quantum resistance without betting everything on newly standardised maths.
• Pilot, then scale. Start with a contained, high-value use case — TLS on an internal service, or code signing — prove the operational model, and expand from there.

The European dimension

For organisations in the DACH, Benelux and Nordic markets, post-quantum migration does not sit in isolation. It intersects directly with NIS2 and DORA, both of which demand state-of-the-art cryptography and robust risk management. Demonstrating a credible PQC roadmap is fast becoming part of what regulators and auditors expect to see. Treating quantum readiness as a compliance enabler — rather than a separate science project — turns a looming risk into a competitive advantage.

How CRYPTAS helps

CRYPTAS combines deep PKI expertise with encryption and key-management capabilities to make post-quantum migration manageable. We help you discover and inventory your cryptographic estate, build crypto-agility into your enterprise PKI, and plan a phased, hybrid migration aligned to BSI guidance and your regulatory obligations. The result is a roadmap your security architects, auditors and board can all stand behind.

Ready to start? Talk to CRYPTAS about a post-quantum readiness assessment and turn the 2031 horizon into a plan you control today.