http://www.macnn.com/articles/08/08/13/usb.key.lock.for.mac/
Tesline-Service debuts Rohos USB key lock for Mac
updated 02:50 pm EDT, Wed August 13, 2008
USB key lock for Mac
Tesline-Service RSL, a security software developer, has released v1.1 of its Rohos Logon Key technology, which now supports Mac OS X Tiger and Leopard. The software allows users to lock or unlock their computer without typing in a password each time, through the use of a USB key. "Keys" take the form of any authorized USB flash drive; when one is removed from a Mac, the desktop is automatically locked. To unlock a screen, the key can be quickly re-inserted. The program requires Max OS X 10.4 or higher, and costs $19, but can be used for free in a 15-day trial.
