Pico: No More Passwords!

Passwords are no longer acceptable as a security mechanism. Memorable, unguessable, high entropy, regularly changed, never written down, and all different ... a contradictory and unsatisfiable set of requests! Solutions have been offered for Web authentication; to users, though, non-Web passwords are just as annoying. I propose a portable gadget called Pico to get rid of passwords everywhere, not just online, transforming "what you know" into "what you have." Maybe your gut reaction to the controversial Pico will be "it'll never work," but I believe we have a duty to come up with something more usable than passwords.