It's cool but

- there's a lot of online steps.
- it's not a threshold system

Using a shamir scheme solves this and isn't subject to birthday attacks:

https://medium.com/@simulx/an-m-of-n-bitcoin-multisig-scheme-e7860ab34e7f



On Mon, Aug 13, 2018 at 7:08 AM nakagat via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Hi all,
>
> I wrote a multisignature procedure using bip-schnorr.
>
> If you have time to review and give feedback, I’d really appreciate it.
> Thanks in advance!
>
> Multisignature
> https://gist.github.com/tnakagawa/0c3bc74a9a44bd26af9b9248dfbe598b
>
> Original
>
> https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.mediawiki#Multisignatures_and_Threshold_Signatures
>
> --
> nakagawa
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