And how securely do you think that PIN is being stored on the bank’s back end?
Discussion
Not in plain text, of course. That would be insecure because employees, not because QC. QC isn't a threat for Bitcoin for the time being, not for online bank accounts either.
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I mean the consequences would be so comprehensive... In bitcoin there would be lots of scamish quantum addresses converter wallets...
In legacy "your" fiat would be blocked and only unlocked presencially (after months, maybe, of the attack), in cash. Maybe they would even print actual paper money on demand, Treasure would outsource the printer directly to the banks.
Who knows