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You can counterfeit that serial number. It's much harder, perhaps neigh impossible, to counterfeit this fingerprint. Thus a database of existing fingerprints te
by Aachen 6y ago
You can counterfeit that serial number. It's much harder, perhaps neigh impossible, to counterfeit this fingerprint. Thus a database of existing fingerprints tells you whether it's real or counterfeit. If you kept a database of serial numbers, you'd additionally need to store who has which bill or you'd still not know whether you're the sole owner of this serial number.
- someguyorother 6y agoCouldn't the central bank just sign the fingerprint and print the signature on the note? If the fingerprint can't be counterfeited and the private key can't be stolen, then the note would be unforgeable. As long as the fingerprint is robust enough.
- mattnewton 6y agoThis was my thought, but with a central database of serial -> fingerprint. I like yours because of the distributed nature.