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 Post subject: 8 Hz timer on Yubikey 2
PostPosted: Thu Aug 06, 2009 10:13 pm 
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Joined: Wed May 28, 2008 7:04 pm
Posts: 263
Location: Yubico base camp in Sweden - Now in Palo Alto
We've got a few questions regarding the 8Hz timer on Yubikey 2.

a) The timer is now more accurate and will now stay within +/- 2% from 8 Hz. This makes time delta calculations more accurate and simple to perform.

b) If the Yubikey2 gets into USB suspend/hibernation, the usage counter will be incremented, just like if the Yubikey was unplugged. Yubikey1 utilizes a micropower timer that is very inaccurate that stays on during hibernation.

A second question is - are there different timers for config 1 and 2 ?

The answer is no - the timer is shared for both configurations. It probably goes without saying, but the counters are separate.

Regards,

JakobE
Hardware- and firmware guy @ Yubico


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