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carlgo11
PostPosted: Fri Nov 28, 2014 3:16 pm 
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Joined: Fri Nov 28, 2014 3:11 pm
Posts: 1
I'm a developer and have owned a yubikey for quite some time now but have yet to understand how the OTP system can authorize a user.
From what I've seen on https://github.com/Yubico/php-yubico/ there's not really a way to know if it's the same user. Just if they user entered a correct OTP.
So if I were to setup a yubikey 2fa integration on one of my pages another user could use their yubikey to login. I hope this is wrong, please advice.

Thanks in advance,
Carlgo11 :)
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henrik
PostPosted: Mon Dec 01, 2014 9:45 am 
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Yubico Team
Yubico Team

Joined: Wed Aug 06, 2014 2:40 pm
Posts: 38
Hi!

The first 12 characters of a standard YubiKey One-Time Password is the ID of the key. For example, the OTP ccccccdtrielbtgbgkbrjvlteentubijtnjeengvrvuh is produced by a YubiKey with the ID ccccccdtriel.

You can read more about this at developers.yubico.com/OTP.
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