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PostPosted: Mon Feb 28, 2011 4:59 am 
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Joined: Mon Feb 28, 2011 4:48 am
Posts: 2
Hi there,

According to the standards for HOTP the key should be a minimum of 128bits for best security, however the personalisation tool (windows) enforces a minimum of 160bits.

I'm attempting to use a YubiKey to replace the Google Authenticator app and I notice that they use a key length of 80bits.

Are we able to allow the personalisation program to use a variable key length instead of enforcing a 160bit key? That would allow me to use my YubiKey with Googles Existing Two-Factor Authentication system.

You can take a look at the standard here:
http://www.ietf.org/rfc/rfc4226.txt


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