====== Frequently Asked Questions ======

> **Q:** Can I use my USB drive as usual ?
>> **A:** Yes. //pam_usb// only occupies a few kilobytes of the device's space.

> **Q:** What if I lose or break my USB key ? Will I be able to log back in ?
>> **A:** Sure. Your usual password will be asked.

> **Q:** How is the USB key identified ?
>> **A:** The USB device is both identified by its manufacturer attributes (//vendor//, //product//, //serial number//) and by a few random bytes called //one time pads// that //pam_usb// writes and updates on the USB device upon authentication.

> **Q:** What if someone copies the content of my flash drive ? Will she/he be able to log into my account ?
>> **A:** Even if that person manages to fake your device's attributes (//vendor//, //product//, //serial number//, //UUID//), the //one time pad// they copied will be outdated as soon as you authenticate.

> **Q:** Is my USB drive compatible with //pam_usb// ?
>> **A:** About every USB flash drive will work with //pam_usb//.

> **Q: ** I can't authenticate anymore, pam_usb gives me the following error: //Pad checking failed//. What should I do ?
>> **A:** It's a machine/device synchronization issue. To get rid of that error you have to reset the pads of your system by removing the //.pamusb// folder located on your home (///root/.pamusb///, ///home/foobar/.pamusb///, etc).


**Q:  ++  I have two USB drives both are in the pamusb.conf,   however if i have the same user under both,   then neither work.  How to you make it work....?