<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body dir="auto"><blockquote type="cite"><b>From:</b> "Lisa R. Lewis" <<a href="mailto:ll2@Princeton.EDU">ll2@Princeton.EDU</a>><br><b>Date:</b> May 8, 2015 at 9:57:47 AM EDT<br><b>To:</b> <a href="mailto:ee-seminar@Princeton.EDU">ee-seminar@Princeton.EDU</a><br><b>Subject:</b> <b>Today: EE Department Seminar-Pramod Viswanath-Spy vs Spy: Anonymous Messaging- 4:30pm E-Quad B2015</b><br><b>Reply-To:</b> "Lisa R. Lewis" <<a href="mailto:ll2@Princeton.EDU">ll2@Princeton.EDU</a>><br><br></blockquote><div><span></span></div><blockquote type="cite"><div>
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<p class="MsoNormal"><b><span style="font-size:14.0pt;color:red">TODAY:<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:22.0pt;font-family:NewCenturySchlbk"><o:p> </o:p></span></b></p>
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OF <o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:20.0pt;font-family:NewCenturySchlbk">ELECTRICAL ENGINEERING SEMINAR SERIES
</span></b><span style="font-size:10.0pt;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
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<b><span style="font-family:"Georgia","serif"">Title: Spy vs Spy: Anonymous Messaging<o:p></o:p></span></b></p>
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<b><span style="font-family:"Georgia","serif"">Date: Friday, May 8, 2015<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-indent:.5in"><b><span style="font-family:"Georgia","serif"">Time:
</span></b><span style="font-family:"Georgia","serif"">4:30pm<b> <o:p></o:p></b></span></p>
<p class="MsoNormal" style="text-indent:.5in"><b><span style="font-family:"Georgia","serif"">Room:
</span></b><span style="font-family:"Georgia","serif"">E-Quad, B205<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><b><span style="font-family:"Georgia","serif"">Host: Prateek Mittal</span></b><b><span style="font-family:NewCenturySchlbk"><o:p></o:p></span></b></p>
<p class="MsoPlainText" style="text-align:justify"><b><span style="font-size:12.0pt;font-family:"Georgia","serif""><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Georgia","serif"">Abstract:</span></b><span style="font-size:10.0pt;font-family:"Georgia","serif""> Anonymous messaging platforms, such as Secret, Whisper and Yik Yak, have emerged as important
social media for sharing one's thoughts without the fear of being judged by friends, family, or the public. Further, such anonymous platforms are crucial in nations with authoritarian governments, where the right to free expression and, sometimes, the personal
safety of the message author depends on anonymity. Current platforms offer only superficial anonymity -- their centralized implementation makes them naturally vulnerable to authoritarian adversaries and/or economic incentives. In this talk, we study the problem
of <i>designing </i>a distributed messaging protocol that spreads the message fast while keeping the identity of the source hidden from an adversary. We present an anonymous messaging protocol, which we call
<i>adaptive diffusion (</i>and is related to the Chinese restaurant process), and show that it spreads fast and achieves nearly <i>perfect obfuscation</i> of the source for a wide range of adversaries. System issues in the implementation of the protocol are
discussed. <o:p></o:p></span></p>
<p class="MsoPlainText" style="text-align:justify"><b><span style="font-size:10.0pt;font-family:"Georgia","serif""><o:p> </o:p></span></b></p>
<p class="MsoPlainText" style="text-align:justify"><b><span style="font-size:10.0pt;font-family:"Georgia","serif"">Bio:
</span></b><span style="font-size:10.0pt;font-family:"Georgia","serif"">Pramod Viswanath received the PhD degree in EECS from the University of California at Berkeley in 2000. He was a member of technical staff at Flarion Technologies until August 2001 before
joining the ECE department at the University of Illinois, Urbana-Champaign. He is a recipient of the Xerox Award for Faculty Research from the College of Engineering at UIUC (2010), the Eliahu Jury Award from the EECS department of UC Berkeley (2000), the
Bernard Friedman Award from the Mathematics department of UC Berkeley (2000), and the NSF CAREER Award (2003). He was an associate editor of the IEEE Transactions on Information Theory for the period 2006-2008.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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