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303 sats \ 6 replies \ @harrr 22 Dec 2023 \ on: So what are we doing about the quantum elephant in the room? bitcoin
ECDSA being broken doesn't break bitcoin, unless you use bitcoin incorrectly (address re-use).
Receiving and spending from the same address?
Would multiple receipts to the same address also be compromised if the address has never been spent from?
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It breaks P2PK and P2TR immediately. You are right that it also breaks addresses that have been re-used, since the pubkey has been revealed.
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It breaks P2PK and P2TR immediately
A quantum computer that can break ECDSA "immediately" is science fiction. Even when we have working quantum computers we'd probably still have decades or centuries before they can perform the necessary attack in the required time. It will be trivial to upgrade bitcoin when necessary.
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when an attack becomes feasible, those address types are already compromised, so they will immediately become vulnerable
you are debating when an attack will become feasible, which is fine
I don't know about centuries, or it will be trivial to upgrade, lol
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ECDSA being broken doesn't break bitcoin, unless you use bitcoin incorrectly (address re-use).
So you're saying that Lightning Network is using bitcoin incorrectly? In LN you reveal your public key when setting up the channel.
It just one example of how you oversimplification is plainly wrong. There are legitimate use-cases that require revealing the public key.