Hardware authentication for Linux using ordinary USB Flash Drives.
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  1. ====== Frequently Asked Questions ======
  2. > Q: Can I use my USB drive as usual ?
  3. >> A: Yes. pam_usb only occupies a few kilobytes of the device's space.
  4. > Q: What if I lose or break my USB key ? Will I be able to log back in ?
  5. >> A: Sure. Your usual password will be asked.
  6. > Q: How is the USB key identified ?
  7. >> A: The USB device is both identified by its manufacturer attributes (vendor,
  8. product, serial number) and by a few random bytes called one time pads that
  9. pam_usb writes and updates on the USB device upon authentication.
  10. > Q: What if someone copies the content of my flash drive ? Will she/he be able
  11. to log into my account ?
  12. >> A: Even if that person manages to fake your device's attributes (vendor,
  13. product, serial number, UUID), the one time pad they copied will be outdated as
  14. soon as you authenticate.
  15. > Q: Is my USB drive compatible with pam_usb ?
  16. >> A: About every USB flash drive will work with pam_usb.