Is it possible to know all master public keys from a multisig wallet by only have acess to one of the keys?
Assuming you created 2 of 3 multisig. This means you have 2 cosigners out of 3 private keys in total. If an hacker was able to access one of the private keys, and unable to access the rest, there is nothing he can do, he can not brute-force the remaining two private keys. He must have access to at least two private keys in order to spend from the multisig wallet. What if i lost 1 of public keys, is it possible to have acess to the multisig wallet?
Private keys are used to access multisig wallets, the private keys can regenerate the public keys, so that is not an issue if you have the private keys. But, like in 2 of 3 multisig wallet, if you lost one private key, better move the bitcoin to a new multisig wallet. Also, if you notice any scam attempt, best to move the bitcoin to a new multisig wallet. For a 2 of 3 multisig, you'll need 2 private keys and one public key. If you don't have that public key, you can't move funds.
