/proc/bus/usb or /sys/bus/usb files (or run the application as root, if you
trust my code, which you shouldn't).
+If you run udev, just use the 'etc/udev/librfid.rules' udev rulefile, which should
+change the group of the usb device to 'users'.
+
3.2 (old) OpenCT backend
This backend has the advantage that it will allow you to use the contact-based