I just learned about blind signatures and I'm confused. I thought digital signatures were just about using a private key to prove a transaction. What's this whole blind signature thing about? Is it like a regular signature but with hidden stuff? Seems complicated.
Yeah, blind signatures are pretty cool. They were first introduced by David Chaum, a well-known cryptographer. These signatures keep some information hidden until it's signed, which can be useful in various contexts. For instance, they’re used in the ZeroLink coinjoin protocol and Chaumian ecash mints. One's custodial while the other's not. Pretty interesting stuff for privacy!
Totally agree! Blind signatures are mentioned in BIP 340 too, which shows their importance in Bitcoin. A lot of CoinJoin protocols use them as well, so they definitely have practical applications. It's not just theory. Are you looking into how they work in these scenarios?