rich1.0npub17ty4mumkv43w8wtt0xsz2jypck0gvw0j8xrcg6tpea25z2nh7meqf4qgydhttps://nostr.ae/npub17ty4mumkv43w8wtt0xsz2jypck0gvw0j8xrcg6tpea25z2nh7meqf4qgydnjumphttps://nostr.ae📅 Original date posted:2012-11-27 📝 Original message:> That hash would then be reported via some secure channel outside of bitcoin's > domain. OK, I see. I guess that could be a reasonable fallback for the case where you have a secure channel. > I don't understand what the relevance of multi-factor is to invoices? Yes, exactly. It's about paying who you think you're paying (when you confirm on a second uncompromised device).