by halseth

I want to announce a prototype for a design and implementation of a vault-like scheme that can be used on Bitcoin today, achieved by outsourcing the signing quorum to a set of blinded co-signers.

Unlike traditional setups involving co-signers, this scheme uses a blinded version of Musig2 to ensure the signers learn as little as possible about the on-chain movements of the funds they are involved in co-signing.

In order to have the co-signers add to the security of the funds (and not just blindly sign whatever is thrown at them), we attach a ZK proof to the signing requests, proving that the transaction is valid according to a pre-determined policy. In this case that is the timelock of the final tx.

...read more at delvingbitcoin.org