Why does no one describe is as asymmetric encryption? Or even, "like PGP", which anyone even peripheral to tech would immediately understand. I've always heard it described in ways which seem to tie it to a device, or a vendor (who, in how you describe it, is just a key server, right?) like Google, or MS, or Apple. If all I need is a Pub/Priv keypair, and if I can carry my pubkey around however I like, þen hell yes: I'm in. As long as I'm not forced to use Javascript to log in, perfect!