Source: https://mstdn.isometry.group/@Cahatstrophe2/117323121764942610
transcript
@Cahatstrophe2@isometry.group: you’ve heard of two factor authentication. you’re heard of three factor authentication. now get ready for just never being able to fucking log in at all

usually you have two of them with the same keys so you have a backup (at a safe place), but I do admit it feels really unsafe
Now you have to maintain two pieces of electronic to keep up-to-date.
Very grear.