Something you know - Type 1 Authentication (passwords, pass phrase, PIN etc.). Something you have -
Type 2 Authentication (ID, Passport, Smart Card, Token, cookie on PC etc.). Something you are - Type
3 Authentication (and Biometrics) (Fingerprint, Iris Scan, Facial geometry etc.). Somewhere you are
- Type 4 Authentication (IP/MAC Address). Something you do - Type 5 Authentication (Signature,
Pattern unlock).