It makes no sense because 2FA is just a second password you give to a centralized entity.
But it is an interesting idea if you think you could have a key that is split in two and a server keeps half and only signs your events once you provide 2FA auth to it.
Perhaps a non-shitcoin custody use case for MPC actually.
Yeees, that would be killer, right?
Because now I'm a bit scared every time I am putting in my private key into amethyst, astral, or whatever.
You can implement it as MuSig. Your second factor is just another signer in a 2-of-2.
I'm not sure that the relays are ready to retrieve multisig. Anyways it shines really promising.
What I thought was to put all relays on a chain (bitcoin or sidechain) so they add some crucial data simultaneously.
For example, if the user wants to have 2FA - this data would be added to the next block so all relays accept messages from this user only signed with 2FA.
Anyways, we need 2FA 🚀
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