From Bluetooth Application:
Bluetooth Passport is designed to implement proximity login and steps away lock for Windows. Using a Bluetooth device, such as a cell phone or a PDA, you can login Windows without inputting user name and password manually. For Bluetooth Passport is based short-range wireless technique, it different from some other types of logon, such as fingerprint or smartcard, just turn your Bluetooth on, the works of login and locking computer can be done automatically. That means very good safety and a great level of comfort for user. We all like to use computer in an easy way. However, we all have to set a password to keep our data safely and keep Trojan horses and spyware out. A weak password is nothing for a person who wants to steal your data or use your computer without permission. A complex password is strong enough, but it's really a nightmare for comfort.
Version 2 supports Vista and Windows Server 2008.