None of these are a solution and can replace passwords.<p>Sms-Passwords: Absurdly insecure, and yeah of course i'ld LOVE to give every stupid little website my phone number.<p>Biometrics, Stamps and Pills: fundamentally are login names not passwords, public, not secret information.<p>Physical tokens: Are already used together with passwords and don't make them oboslete. Nothing to see here.