Is it safe to reuse the same base wallet seed when creating multiple multisig wallets with different people? Say I want to make a 2/2 multisig wallet where me and bob are the signers, and then another 2/2 multisig wallet where me and charlie are the signers. If I use the same "base" wallet (the one that issues the `make_multisig` command) for making both multisig wallets is there any information leaked between them or security

issues to be aware of?

Alex|LocalMonero: if you do that you need to guarantee that every multisig created from your seed uses the same M/N config. In the future I think we need a custom multisig seed that bakes in the config.

UkoeHB: What happens if it doesn't?

if for example you make a 2-of-4 and a 2-of-3 with the same people, then during the 2-of-4 setup you will leak your 2-of-3 private keys

What if I'm making a pair of 2/2 multisig wallets from the same base wallet where the cosigner in both wallets is bob, who's using two different seeds on his side for the base wallets, would that leak any info to him?

bob will know he is cosigning with the same person. There shouldn't be any other issues

So, assuming I designate one base wallet to always do 2/2 and nothing else I'm safe from any issues, apart from leaking that the cosigner is the same, correct?

sounds right to me

Thanks.

I think the requirement is slightly looser, you can always do N-of-N for any N, but you can only do M-of-N for one M/N config.

or I guess you can only do M-of-N for a fixed value of N - M (but any value of M)

jeffro256[m]: is 8707 ready for review?

yeah, I wanted to review it but it just kept updating :D