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<h3><img src="cid:part1.05050407.07000302@ruhr-uni-bochum.de"
alt="HGI" height="106" align="right" width="116"><br>
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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>Ralph Holz</u></big></small><u><br>
<br>
</u><small>von der <br>
<br>
T</small></big></big></big><big><big><big><small>echnische
Universität München</small></big></big></big><big><big><big><small><br>
<br>
am <br>
<br>
nächsten <u>Donnerstag, den 15. Dezember 2011
um 11.00 Uhr s.t. in Raum ID 04/653<br>
<br>
</u>über folgendes Thema referieren:</small><br>
</big></big></big> <br>
<br>
<hr size="2" width="100%"><big><b>The SSL Landscape - Analysis
and discussion of the X.509 PKI for SSL/TLS</b><br>
<br>
</big>
<p><big>The SSL and TLS infrastructure used in important
protocols like HTTPs and IMAPs is built on an X.509
public key infrastructure (PKI). Certificates are
used to authenticate services like online banking,
shopping, e-mail, etc. However, it always has been felt
that the certification processes of this PKI may
not be conducted with enough rigor, resulting in a
possibly insecure deployment.</big></p>
<p><big>In this talk, we present a comprehensive
analysis of X.509 certificates used in the wild. We
begin with an overview of critical incidents in the
past 2 years and highlight the current shortcomings of
PKI deployment. Then, we turn to the results of our own
1.5-year study of the X.509 PKI, which we have
presented at IMC 2011.</big></p>
<p><big>We conducted HTTPs scans of a large number of
popular HTTPs servers, including scans from nine
locations distributed over the globe.
Furthermore, we monitored live SSL/TLS traffic on a
10 Gbps uplink of the Munich Research Network. A
third-party scan of the entire IPv4 space
complements our own data sets. Our analyses reveal
that the quality of certification lacks in
stringency, due to a number of reasons among which
invalid certification chains and certificate
subjects give the most cause for concern. Our findings
confirm that the X.509 PKI that we use so often in our
everyday's lives is in a sorry state.</big></p>
<p><big>Towards the end of the talk, we discuss some
proposals made by EFF, Moxie Marlinspike and others
to reinforce or replace the current PKI.</big></p>
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12px; font-family: inherit; vertical-align: baseline;
text-align: justify;"> </p>
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<p style="margin: 0px 0px 1.5em; padding: 0px; border-width:
0px; font-weight: inherit; font-style: inherit; font-size:
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text-align: justify;"><br>
</p>
<span class="Apple-style-span" style="border-collapse:
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class="Apple-style-span" style="color: rgb(0, 53, 96);"> </span></span><span
class="Apple-style-span" style="border-collapse: separate;
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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 04/563.<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>
<p><span class="Apple-style-span" style="border-collapse:
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letter-spacing: normal; line-height: normal; orphans: 2;
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class="Apple-style-span" style="color: rgb(0, 53, 96);"></span></span></p>
<span class="Apple-style-span" style="border-collapse:
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widows: 2; word-spacing: 0px;"><span
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>
</span></span><span class="Apple-style-span"
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<span class="Apple-style-span" style="border-collapse:
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<big><big>Beste Grüße, <br>
Saqib A. Kakvi</big></big><br>
<br>
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