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<h3><img src="cid:part1.05080207.04010300@rub.de" alt="HGI"
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<big><big><big><small>Sehr geehrte Damen und Herren, <br>
<br>
<br>
im Rahmen des HGI-Kolloquiums, organisiert vom
Lehrstuhl Kryptologie und IT-Sicherheit (CITS), wird<br>
<br>
<big><u>Martin Novotny</u></big></small><u><br>
<br>
</u><small>von der <br>
<br>
Tschechische T</small></big></big></big><big><big><big><small>echnische</small></big></big></big><big><big><big><small>Universität,
Prag</small></big></big></big><big><big><big><small><br>
<br>
am <br>
<br>
nächsten <u>Mittwoch, den 21. Dezember 2011
um 11.00 Uhr s.t. in Raum ID 03/653<br>
<br>
</u>über folgendes Thema referieren:</small><br>
</big></big></big> <br>
<br>
<hr size="2" width="100%"><big><b>Breaking HiTag2 with
COPACOBANA</b><br>
<br>
The Hitag2 stream cipher is used in many real-world
applications, such as car immobilizers and door
opening systems, as well as for the access control of
buildings. The short length of the 48-bit secret key
employed makes the cipher vulnerable to a brute-force
attack, i.e., exhaustive key search. In this
presentation we introduce the first hardware
architecture for the cryptanalysis of Hitag2 by
means of exhaustive key search. Our implementation
on the Cost-Optimized Parallel Code-Breaker
COPACOBANA is able to reveal the secret key of a
Hitag2 transponder in less than 2 hours (103.5
minutes) in the worst case. The speed of our approach
outperforms all previously proposed attacks and
requires only 2 sniffed communications between a
car and a tag. Our findings thus define a new lower limit
for the cloning of car keys in practice. Moreover, the
attack is arbitrarily parallelizable and could thus
be run on multiple COPACOBANAs to decrease the time
to find the secret key.</big>
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class="Apple-style-span" style="color: rgb(0, 53, 96);"> </span></span><span
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word-spacing: 0px;"><span class="Apple-style-span"
style="color: rgb(0, 53, 96);"><big>Der Vortrag beginnt am
Donnerstag um 11.00 Uhr s.t. im ID 03/563.<br>
</big></span></span><br>
<span class="Apple-style-span" style="border-collapse:
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class="Apple-style-span" style="color: rgb(0, 53, 96);"><big>Zu
diesem und sämtlichen weiteren Vorträgen im Rahmen des
HGI-Kolloquiums sind alle Studierenden und
Interessierten herzlich eingeladen! Eine Voranmeldung
ist nicht erforderlich!</big></span></span>
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class="Apple-style-span" style="color: rgb(0, 53, 96);"><big>Weitere
Informationen gibt es auf folgender Webseite:<br>
<br>
<a
href="http://hgi.rub.de/hgi/hgi-seminar/aktuelles/">http://hgi.rub.de/hgi/hgi-seminar/aktuelles/</a></big><br>
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<big><big>Beste Grüße, <br>
Saqib A. Kakvi</big></big><br>
<br>
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