Will Quantum Computers Break Bitcoin?

[Bussin]

Q: Will quantum computers break Bitcoin overnight? A: Not overnight, but they could become a serious problem for exposed public keys if large enough fault-tolerant quantum computers arrive. Q: Does that mean Bitcoin mining is doomed too? A: Mining is mostly a hash problem, so quantum speedups are less dramatic there than people often assume. Q: What should people watch? A: The important signs are migration plans for quantum-safe signatures, wallet behaviour, and whether old coins with exposed public keys are treated as a real risk.

[DigitalNomad76]

This is the kind of Bitcoin discussion I prefer because it separates mining from signatures instead of turning everything into panic.

[DQ Eric]

The exposed public key issue is the bit most casual holders never think about, especially with old reused addresses.

[GhostRider63]

I still think Bitcoin would adapt if the threat became realistic, but the migration would be messy and political.

[error.404]

Good Q&A topic. It should make clear that quantum risk is not zero, but it is not a magic instant Bitcoin death switch either.

[HeartbreakKid]

Good shout. You are not wrong.

Nice one.