Re: [bitcoin-dev] Private Collaborative Custody with FROST

2023-08-30 Thread Nick Farrow via bitcoin-dev
Hey Rijndael, Here are some rough ideas for a draft scheme that I think will help explain this better. We begin by taking a single public nonce `D` from the collaborative signing server to form a nonce pair for FROST `(D, 0)`. This is then used to build the aggregate FROST nonce `R` which the si

Re: [bitcoin-dev] Private Collaborative Custody with FROST

2023-08-29 Thread rot13maxi via bitcoin-dev
Good morning Nick, Love the direction of this. > We can achieve this compatibility by having the server sign under a single > nonce (not a binding nonce-pair like usual FROST), which is later blinded by > the nonce contributions from other signers. Can you say more about this? It sounds like t

[bitcoin-dev] Private Collaborative Custody with FROST

2023-08-28 Thread Nick Farrow via bitcoin-dev
Hello all, Some thoughts on private collaborative custody services for Bitcoin. With multiparty computation multisignatures like FROST [0], it is possible to build a collaborative custodian service that is extremely private for users. Today's collaborative custodians can see your entire wallet h