@adamhotep @snopes rather than using Signal, I suggest self hosting an #XMPP server with accounts for key people. Create a group for sharing MFA keys and keep this sensitive information under your control. If your xmpp server was, say chat.snopes.com, then you can leverage DNS security to have confidential discussions with external people too. See [It is good to be a tree}(https://wordpress.debian.social/jlines/2021/01/12/it-is-good-to-be-a-tree/)