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<title>Yubico Forum</title>
<subtitle>...visit our web-store at</subtitle>
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<updated>2010-04-20T22:01:00+01:00</updated>

<author><name><![CDATA[Yubico Forum]]></name></author>
<id>https://forum.yubico.com/feed.php?f=16&amp;t=520</id>
<entry>
<author><name><![CDATA[Leveldown]]></name></author>
<updated>2010-04-20T22:01:00+01:00</updated>
<published>2010-04-20T22:01:00+01:00</published>
<id>https://forum.yubico.com/viewtopic.php?t=520&amp;p=2166#p2166</id>
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<title type="html"><![CDATA[Brute force the access code of the Yubikey.]]></title>

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Hi together!<br /><br />Just for your information:<br /><br />I tried to crack the access code of the Yubikey using a C program based on the ykpersonalize project. Turns out it takes a pretty long time to crack the 48-bit code: With my program I get around 13 codes per second, at this rate (If I'm really calculating it the right way.) it would take sever thousand years to crack the code.<br /><br />If you want to try it out yourself, you can find the code <a href="http://stacksmashing.net/2010/04/19/yubicrack-brute-forcing-a-yubikey/" class="postlink">http://stacksmashing.net/2010/04/19/yubicrack-brute-forcing-a-yubikey/</a><br /><br />Kind regards,<br /><br />Thomas Roth<p>Statistics: Posted by <a href="https://forum.yubico.com/memberlist.php?mode=viewprofile&amp;u=967">Leveldown</a> — Tue Apr 20, 2010 10:01 pm</p><hr />
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