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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Herewith I send you the complete program of the CWG-meeting for Friday, September 6, 2013.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">With kind regards / Met vriendelijke groeten,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Lucida Calligraphy";color:#1F497D">Anita Klooster<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">secretary of the section Discrete Mathematics<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Lucida Calligraphy";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><img width="180" height="38" id="Picture_x0020_1" src="cid:image001.gif@01CCA472.99927100" alt="cid:image001.gif@01CB8FB5.88A9C0F0"></span><span lang="EN-US" style="font-family:"Lucida Calligraphy";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Dept. of Mathematics and Computer Science<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">MF 4.058<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Office hours: Monday and Friday 08.30-12.30 h / Tuesday and Wednesday 08.30-17.00 h<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Telephone: +31 (0)40 2472254<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Email: <a href="mailto:secdm@tue.nl">
secdm@tue.nl</a> <o:p></o:p></span></p>
<div style="border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal"><u><span lang="EN-US" style="color:#1F497D"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
</div>
<p class="MsoNormal"><u><span lang="EN-US"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
<p class="MsoNormal"><strong><u><span lang="EN-US" style="font-size:18.0pt;font-family:"Arial","sans-serif"">CRYPTO WORKING GROUP</span></u></strong><strong><span lang="EN-US" style="font-size:18.0pt;font-family:"Arial","sans-serif""> </span></strong><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:14.0pt;font-family:"Arial","sans-serif"">Friday, September 6, 2013<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">
</span><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">De Kargadoor (<span style="color:#1F497D"><a href="http://www.kargadoor.nl/utrecht/zaalverhuur.html">http://www.kargadoor.nl/utrecht/zaalverhuur.html</a></span>)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> Oudegracht 36, Utrecht<o:p></o:p></span></p>
<pre><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></b><o:p></o:p></pre>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Program<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">10.45 – 11.30 hrs. Tanja Lange
</span></b><span lang="EN-US" style="font-family:"Arial","sans-serif"">(<i>TU/e</i>),<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US"> </span></b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">Factoring RSA keys from certified smart cards: Coppersmith in the wild<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US" style="font-size:10.0pt">
</span><span lang="EN-US" style="font-size:9.0pt">
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">11.30 - 11.45 hrs.
</span></b><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">Coffee / tea break</span></i><i><span lang="EN-GB" style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<i><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">11.45 - 12.30 hrs. Michael Feiri
</span></b><span lang="EN-US" style="font-family:"Arial","sans-serif"">(<i>Univ. Twente</i>),<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:106.2pt;text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">The practical weakness of the S/KEY one-time-password system (RFC 1760 and 2289) against brute force attacks<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:106.2pt;text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<a name="OLE_LINK1"><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">12.30 - 14.00 hrs.</span></b></a><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">
</span></b><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">Lunch break (lunch not included)<o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<i><span lang="EN-US"><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">14.00 - 14.45 hrs.
</span></b><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Mathias Morbitzer</span></b>
<span style="font-family:"Arial","sans-serif"">(<i>RU Nijmegen</i>),<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:70.8pt;text-align:justify;text-indent:35.4pt;line-height:15.0pt;mso-line-height-rule:exactly">
<span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black">TCP Idle Scans in IPv6</span><b><span style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">14.45 - 15.00 hrs.
</span></b><i><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">Coffee / tea break<o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<i><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></i></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">15.00 - 15.45 hrs. Zekeriya Erkin
</span></b><span lang="EN-US" style="font-family:"Arial","sans-serif"">(<i>TU Delft</i>),<o:p></o:p></span></p>
<p class="MsoPlainText" style="margin-left:70.8pt;text-indent:35.4pt"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">Privacy Preserving Online Services for Dynamic Settings<span style="color:#1F497D"><o:p></o:p></span></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif"">(Abstract below)<span style="color:#1F497D"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<div style="border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<b><span lang="EN-US" style="font-family:"Arial","sans-serif""><o:p> </o:p></span></b></p>
<p class="MsoPlainText"><u><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">Abstract talk Zekeriya Erkin: Privacy Preserving Online Services for Dynamic Settings<o:p></o:p></span></u></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif"">In recent years, services that process user-generated data have become increasingly popular due to the spreading of social technologies in online applications.
The data being processed by these services are mostly considered privacy sensitive, and thus raises privacy concerns among users. As a scientific solution, privacy- preserving methods based on cryptographic techniques have attracted great attention in the
last years. Unfortunately, the existing solutions consider static settings, where the computation is executed only once for a fixed number of users. However, in practice online applications have a dynamic environment, where users join and leave the service
at any time. <o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">In this talk, we show that user-data oriented services, which are privacy preserving in static settings, leak information in dynamic environments.
We then propose a method to overcome the information leakage problem due to consequent invocation of the cryptographic protocols. We also present realizations of our ideas in two different attacker models, namely semi-honest and malicious.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;line-height:15.0pt;mso-line-height-rule:exactly">
<span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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