The post-quantum clock is ticking: start migrating now

Security teams spent 2025 quietly bracing for a shift most users will never see but everyone will depend on: the migration to post-quantum cryptography. With standardised quantum-resistant algorithms now finalised, the question stopped being 'if' and became 'how fast'.

Why now, when quantum computers can't break encryption yet

The threat isn't only future — it's retroactive. Adversaries can capture encrypted traffic today and simply store it, waiting for a quantum computer capable of breaking it. Anything with a long confidentiality lifetime — health records, financial data, state secrets — is effectively already exposed. This is the 'harvest now, decrypt later' problem, and it's why migration can't wait for the threat to fully materialise.

The data you encrypt with yesterday's algorithms today may be readable tomorrow. For long-lived secrets, the future is already here.

Crypto-agility is the real goal

The lasting lesson isn't 'switch to algorithm X'. It's that cryptographic choices should never be hard-coded again. We design systems to be crypto-agile — able to swap algorithms with a config change, not a rewrite — so the next transition is a routine update rather than a multi-year fire drill.

How we approach the migration

• Inventory first. You can't protect what you can't see — we map every place cryptography is used.
• Hybrid mode. Run classical and post-quantum algorithms together so you're protected even if one has a weakness.
• Prioritise by data lifetime. The longer a secret must stay secret, the sooner it migrates.

Security by design, still

Post-quantum is one more reason to build security in rather than bolt it on. Least-privilege everywhere, secrets never in code, encryption at rest and in transit by default, dependency scanning in CI — the fundamentals that make any migration survivable. Security added late is a patchwork; security designed in is just how the system works.

The takeaway

You don't need a quantum computer in the room to be at risk today. Start the inventory, build for crypto-agility, and migrate your longest-lived secrets first. The teams that move early will treat the quantum era as a non-event — which is exactly the goal.