For what it’s worth, I finally set up a yubikey to access certain sites.
Yubikey seems to be a “no-brainer” security device to create another level of security. Once yubikey recognizes your computer and the site you’ve registered with, there’s no way anyone can hack into your account without the yubikey. Or at least, that’s what I’m told.
To access a site, you must physically plug the yubikey into your computer and then tap it when prompted.
I’ll now go cross my fingers and rub my lucky rabbit’s foot, just in case.
Yubikey is recognized by the server you are connecting to. Your computer is just he go-between. You can use the same yubikey on any computer (that's one of the advantages).