14.3 Cross Input Signature Aggregation in Bitcoin || Lloyd Fournier
Wasabi Wallet
Fournier describes cross-input signature aggregation: combining multiple owned Bitcoin outputs into a single Schnorr signature without on-chain proofs or interaction with other parties. The security challenge is proving you own specific outputs while preventing unauthorized spending of others' keys—solvable with Schnorr but impossible with ECDSA. He identifies this as the long-term "holy grail" of
https://relay.towardsliberty.com/9c0c002cbace836d0a88aafadf98e88140eecd02123f93ab280124aaf8e14379.mp4
Wasabi Wallet
Fournier describes cross-input signature aggregation: combining multiple owned Bitcoin outputs into a single Schnorr signature without on-chain proofs or interaction with other parties. The security challenge is proving you own specific outputs while preventing unauthorized spending of others' keys—solvable with Schnorr but impossible with ECDSA. He identifies this as the long-term "holy grail" of
https://relay.towardsliberty.com/9c0c002cbace836d0a88aafadf98e88140eecd02123f93ab280124aaf8e14379.mp4