This sounds interesting, but may need to be more complex. Consider:

• Can one ask for different passwords in a script (e.g the read passwd then the write passwd)? If so you need to specify which one in get_passwd
• How does the provider know/authenticate who is asking? If I ask a file for a passwd, to whom does it give it up? Are OS read perms all we use?
• Let's say the passwd is on a USB dongle. I need to provide a string to the dongle to check it. How do I do that?

Just a few things to think about.

--traveler

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