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[QUESTION] Establishing shared secret for Password Safe
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Author:  beckettsmusic [ Sat Apr 06, 2013 8:27 pm ]
Post subject:  [QUESTION] Establishing shared secret for Password Safe

I'm not sure I understand how the Yubikey works with Password Safe. There appear to be two different descriptions of how to set up a Yubikey to work with Password Safe: one at


which describes using the personalization tool to establish a challenge response configuration and create a 20 byte secret key, and another in Yubico's video, at


where Password Safe is used to generate a secret key and write it back to the Yubikey.

I can see how the second method works: both Password Safe and the Yubikey share the secret when the configuration procedure is complete. However, in the case of the first method, I don't see how the secret key becomes known to Password Safe. If the key isn't shared, how can Password Safe verify the Yubikey response when a password database is to be opened?


Author:  Tom [ Mon Apr 08, 2013 9:02 am ]
Post subject:  Re: [QUESTION] Establishing shared secret for Password Safe

The first one use HMAC-SHA1 algorithm. http://tools.ietf.org/html/rfc2104

Read carefully steps 4-7 and you will see how this works in combination with password safe.

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