Using a usb as a "login key"?


I'm trying to get a usb to work as a "username/password" thing. For example:
to login to a simple account one must plug in their usb(which i know have a serial number) to gain access.

Running example:
Please insert your USB to login.......

USB plugged in ..........

Access granted....


It all depends on the OS/Login Process.

This isn't quite what you're looking for, buut you may gain some insight into the problem. This describes how to encrypt a disk (Arch Linux) and store the key on a USB stick.
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