The quantum computing risk gets dismissed too quickly in crypto discussions
I used to assume this was one of those problems that's too far off to think about. After actually reading into it, I've changed my mind a bit.
The part that stands out is harvest now, decrypt later. An attacker doesn't need a working quantum computer today. They just need to capture encrypted data now and hold onto it until the hardware exists to break it later. That means the exposure window has already started for anything encrypted today, regardless of when the actual breakthrough happens.
NIST has also already finalized post-quantum cryptography standards. That's not a hypothetical anymore, it's a signal that infrastructure is expected to start migrating.
What makes this relevant to crypto specifically is that permanence is the whole selling point. An immutable ledger is only an advantage as long as the cryptography behind it holds. If it doesn't, permanence just becomes permanent exposure, and there's no patching history after the fact.
I'm not saying this is an emergency. Timelines are genuinely uncertain. But migrating cryptographic systems takes years even in ideal conditions, and waiting until there's consensus on urgency kind of defeats the point of preparing early.
Curious if anyone's seen projects actually building toward this versus just acknowledging it exists when it comes up.