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====== Frequently Asked Questions ======
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> Q: Can I use my USB drive as usual ?
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>> A: Yes. pam_usb only occupies a few kilobytes of the device's space.
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> Q: What if I lose or break my USB key ? Will I be able to log back in ?
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>> A: Sure. Your usual password will be asked.
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> Q: How is the USB key identified ?
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>> A: The USB device is both identified by its manufacturer attributes (vendor,
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product, serial number) and by a few random bytes called one time pads that
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pam_usb writes and updates on the USB device upon authentication.
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> Q: What if someone copies the content of my flash drive ? Will she/he be able
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to log into my account ?
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>> A: Even if that person manages to fake your device's attributes (vendor,
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product, serial number, UUID), the one time pad they copied will be outdated as
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soon as you authenticate.
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> Q: Is my USB drive compatible with pam_usb ?
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>> A: About every USB flash drive will work with pam_usb.
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> Q: I can't authenticate anymore, pam_usb gives me the following error: Pad
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checking failed. What should I do ?
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>> A: It's a machine/device synchronization issue. To get rid of that error you
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have to reset the pads of your system by removing the .pamusb folder located on
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your home (/root/.pamusb/, /home/foobar/.pamusb/, etc).
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