A PAM Module for authentication with USB devices

am_usb is a PAM module that enables authentication using an USB-Storage device
(such as an USB Pen) through DSA private/public keys.

It can be setup to work with any application using PAM such as your system
login (login), your X login (XDM/KDM/GDM/...), your screensaver (xscreensaver/...),
and many others.

It supports multiple users for the same device, multiple hostnames for the same
user, serial numbers access list and private key encryption.

pam_usb comes along usbadm, a tool which helps managing users and keys.