[tor-commits] r24791: {} my abstract for the crypto 2011 talk (in projects/articles: . crypto2011)
Roger Dingledine
arma at torproject.org
Sat May 28 07:16:03 UTC 2011
Author: arma
Date: 2011-05-28 07:16:03 +0000 (Sat, 28 May 2011)
New Revision: 24791
Added:
projects/articles/crypto2011/
projects/articles/crypto2011/crypto2011-tor.bib
projects/articles/crypto2011/crypto2011-tor.tex
projects/articles/crypto2011/direct-users-2011-04-01-300-eg-2010-12-01.png
projects/articles/crypto2011/direct-users-2011-04-01-300-ir-2010-12-01.png
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projects/articles/crypto2011/direct-users-2011-04-01-300-sa-2010-09-01.png
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Log:
my abstract for the crypto 2011 talk
Added: projects/articles/crypto2011/crypto2011-tor.bib
===================================================================
--- projects/articles/crypto2011/crypto2011-tor.bib (rev 0)
+++ projects/articles/crypto2011/crypto2011-tor.bib 2011-05-28 07:16:03 UTC (rev 24791)
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+ at inproceedings{dingledine2004tor,
+ author = {Roger Dingledine and Nick Mathewson and Paul Syverson},
+ title = {Tor: The Second-Generation Onion Router},
+ booktitle = {Proceedings of the 13th USENIX Security Symposium},
+ year = {2004},
+ month = {August},
+ pages = {303--320},
+}
+
+ at inproceedings{mccoy2008shining,
+ title = {Shining Light in Dark Places: Understanding the {Tor} Network},
+ author = {Damon McCoy and Kevin Bauer and Dirk Grunwald and Tadayoshi
+ Kohno and Douglas Sicker},
+ booktitle = {Proceedings of the Eighth Symposium on Privacy Enhancing
+ Technologies (PETS 2008)},
+ year = {2008},
+ month = {July},
+ address = {Leuven, Belgium},
+ pages = {63--76},
+ editor = {Nikita Borisov and Ian Goldberg},
+ publisher = {Springer},
+ series = {Lecture Notes in Computer Science},
+ volume = {5134},
+}
+
+ at inproceedings{differential,
+ title = {Differential Privacy},
+ author = {Cynthia Dwork},
+ booktitle = {33rd International Colloquium on Automata, Languages
+and Programming (ICALP)},
+ year = {2006},
+ month = {July},
+ address = {Venice, Italy},
+ pages = {1--12},
+ publisher = {Springer},
+ series = {Lecture Notes in Computer Science},
+ volume = {4052},
+}
+
+ at techreport{loesing2009measuring,
+ title = {Measuring the {Tor} Network from Public Directory Information},
+ author = {Karsten Loesing},
+ institution = {2nd Hot Topics in Privacy Enhancing Technologies (HotPETs
+ 2009)},
+ year = {2009},
+ month = {August},
+ address = {Seattle, WA, USA},
+}
+
+ at inproceedings{loesing2008performance,
+ author = {Karsten Loesing and Werner Sandmann and Christian Wilms and Guido Wirtz},
+ title = {Performance Measurements and Statistics of {Tor} Hidden Services},
+ booktitle = {Proceedings of the International Symposium on Applications and the Internet (SAINT 2008)},
+ month = {July},
+ year = {2008},
+ address = {Turku, Finland},
+ publisher = {IEEE Computer Society}
+}
+
+ at inproceedings{lenhard2009performance,
+ title = {Performance Measurements of {Tor} Hidden Services in Low-Bandwidth Access Networks},
+ author = {J{\"o}rg Lenhard and Karsten Loesing and Guido Wirtz},
+ booktitle = {Proceedings of the 7th International Conference on
+ Applied Cryptography and Network Security (ACNS 09), Paris-Rocquencourt, France},
+ month = {June},
+ year = {2009},
+}
+
+ at inproceedings{wendolsky2007performance,
+ title = {Performance Comparison of Low-Latency Anonymisation Services from a User Perspective},
+ author = {Rolf Wendolsky and Dominik Herrmann and Hannes Federrath},
+ booktitle = {Proceedings of the Seventh Symposium on Privacy Enhancing Technologies (PET 2007)},
+ pages = {233--253},
+ year = {2007},
+ month = {June},
+ series = {Lecture Notes in Computer Science},
+ publisher = {Springer},
+ editor = {Nikita Borisov and Philippe Golle},
+ volume = {4776},
+}
+
+ at manual{tor2009dirspec,
+ author = {The Tor Project},
+ title = {Tor directory protocol, version 3},
+ year = {2009},
+ note = {\url{https://git.torproject.org/checkout/tor/master/doc/spec/dir-spec.txt}},
+}
+
+ at manual{bridges-spec,
+ author = {The Tor Project},
+ title = {Tor bridges specification},
+ year = {2009},
+ note = {\url{https://git.torproject.org/checkout/tor/master/doc/spec/bridges-spec.txt}},
+}
+
+ at inproceedings{murdoch-pet2007,
+ title = {Sampled Traffic Analysis by {I}nternet-Exchange-Level Adversaries},
+ author = {Steven J. Murdoch and Piotr Zieli{\'n}ski},
+ booktitle = {Proceedings of the Seventh Workshop on Privacy Enhancing Technologies (PET 2007)},
+ year = {2007},
+ month = {June},
+ address = {Ottawa, Canada},
+ editor = {Nikita Borisov and Philippe Golle},
+ publisher = {Springer},
+ series = {LNCS 4776},
+}
+
+ at inproceedings{hs-attack06,
+ title = {Locating Hidden Servers},
+ author = {Lasse {\O}verlier and Paul Syverson},
+ booktitle = {Proceedings of the 2006 IEEE Symposium on Security and Privacy},
+ year = {2006},
+ month = {May},
+ publisher = {IEEE CS},
+ www_pdf_url = {http://www.onion-router.net/Publications/locating-hidden-servers.pdf},
+ www_section = {Traffic analysis},
+}
+
+ at misc{colorado-irb-response,
+ author = {Damon McCoy and Kevin Bauer and Dirk Grunwald and Tadayoshi Kohno and Douglas Sicker},
+ title = {Response to Tor Study},
+ note = {\url{http://systems.cs.colorado.edu/mediawiki/index.php/Response_To_Tor_Study}},
+}
+
+ at misc{tor-legal-faq,
+ key = "Tor-legal-faq",
+ author = "{Electronic Frontier Foundation}",
+ title = "Tor: Legal {FAQ} for {T}or Server Operators",
+ howpublished = {\url{https://www.torproject.org/eff/tor-legal-faq.html}}
+}
+
+ at inproceedings{wecsr10measuring-tor,
+ title = {A Case Study on Measuring Statistical Data in the {T}or Anonymity Network},
+ author = {Karsten Loesing and Steven J. Murdoch and Roger Dingledine},
+ booktitle = {Proceedings of the Workshop on Ethics in Computer Security Research (WECSR 2010)},
+ year = {2010},
+ month = {January},
+ address = {Tenerife, Canary Islands, Spain},
+ publisher = {Springer},
+ series = {LNCS 6054},
+ editor = {Sven Dietrich},
+ howpublished = {\url{https://metrics.torproject.org/papers/wecsr10.pdf}},
+}
+
+ at techreport{tor-blocking,
+ title = {Design of a blocking-resistant anonymity system},
+ author = {Roger Dingledine and Nick Mathewson},
+ institution = {The Tor Project},
+ number = {2006-1},
+ year = {2006},
+ month = {November},
+ howpublished = {\url{https://svn.torproject.org/svn/projects/design-paper/blocking.pdf}},
+}
+
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+ *
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+\documentclass{llncs}
+\usepackage[cmex10]{amsmath}
+\usepackage{subfigure}
+\usepackage[pdftex]{graphicx}
+\usepackage{graphics}
+\usepackage{color}
+\pagestyle{empty}
+
+%\usepackage[pdftex,%
+% breaklinks=true,%
+% colorlinks=true,%
+% linkcolor=black,%
+% citecolor=black,%
+% urlcolor=black,%
+% bookmarks=false,%
+% pdfpagemode=UseNone,%
+%]{hyperref}
+
+\begin{document}
+\title{Tor and circumvention: lessons learned\\
+(Abstract to go with invited talk)}
+\author{Roger Dingledine}
+\institute{The Tor Project}
+\maketitle
+
+Tor is a free-software anonymizing overlay network that helps people
+around the world use the Internet in safety. Tor's 2500 volunteer relays
+carry almost 10Gb/s of traffic for several hundred thousand users each day.
+
+While many in the
+research community know Tor as the primary fielded system in the anonymous
+communications literature~\cite{dingledine2004tor}, Tor has also played a
+central role in recent
+research on \emph{blocking resistance}. That is, even if an anonymity
+system provides
+great anonymity, a government censor can render it moot by simply
+blocking the relays. In recent years we streamlined Tor's
+network communications to look more like ordinary SSL, and we introduced
+``bridge relays'' that are harder for an attacker to find and block than
+Tor's public relays~\cite{tor-blocking}.
+
+Tor played a key role in several Middle Eastern countries in early
+2011. In this talk I'll walk the audience through how Iran used
+its Nokia DPI boxes to filter SSL flows that used Tor's original Diffie-Hellman
+parameter $p$; the surge in Tor traffic when Egypt blocked Facebook and
+the flatline when they unplugged the net; the continued bad news for
+Libya's Internet; and an intriguing trend in Saudi Arabia. I'll also
+cover current trends in China and Tunisia (not pictured).
+
+\begin{figure}[h]
+\begin{minipage}{0.495\textwidth}
+\includegraphics[width=\linewidth]{direct-users-2011-04-01-300-ir-2010-12-01.png}
+\end{minipage}
+\begin{minipage}{0.495\textwidth}
+\includegraphics[width=\linewidth]{direct-users-2011-04-01-300-eg-2010-12-01.png}
+\end{minipage}
+\begin{minipage}{0.495\textwidth}
+\includegraphics[width=\linewidth]{direct-users-2011-04-01-300-ly-2010-12-01.png}
+\end{minipage}
+\begin{minipage}{0.495\textwidth}
+\includegraphics[width=\linewidth]{direct-users-2011-04-01-300-sa-2010-09-01.png}
+\end{minipage}
+\caption{Estimates of daily Tor clients connecting from each country}
+\end{figure}
+
+The data for these user graphs, along with historical Tor network
+data and ongoing performance statistics, are all available at
+https://metrics.torproject.org/. Our WECSR'10
+paper~\cite{wecsr10measuring-tor} explains our
+aggregation techniques and why we think they're safe---we'd love for you
+to show us that we're wrong. Further, if you're working on Tor-related
+research, please talk to us (https://torproject.org/research)
+so we can explain what's available and help interpret your results.
+
+\subsection*{Some open questions from the anonymity field}
+
+Here are a few examples of open anonymity and blocking-resistance
+problems:
+
+1) How effective is the traffic correlation attack really? Tor's threat
+model assumes that an adversary who can see a traffic flow into the Tor
+network and the corresponding flow out of the Tor network can correlate
+them with high probability and low false positives. Recent results from
+Steven Murdoch~\cite{murdoch-pet2007} show confirmation attacks even when both
+sides only see a small sample of traffic on each side. But how quick
+can the attack actually be in practice, using how little traffic? Are
+there effective padding schemes to make correlation less effective?
+
+2) For various diversity metrics (like entropy), how has the diversity
+of the Tor network changed over time? How robust is it to change or
+attack?{\footnote{https://blog.torproject.org/blog/research-problem-measuring-safety-tor-network}}
+
+3) How can we automatically recognize blocking events---when Tor relays
+are censored at a firewall by destination address or by traffic flow
+characteristics?
+
+4) Clients who are censored from the public Tor relays can use private
+addresses to ``bridge'' into the public Tor network. What strategies
+should we use to give out these addresses such that legitimate users
+get enough addresses but adversaries can't learn too many?
+
+5) How can we make it hard for censors to recognize Tor traffic flows by
+content (e.g.\ distinguishing Tor's handshake from other expected protocols)
+and by traffic characteristics (packet size, volume, and timing)? We need
+\emph{obfuscation} metrics to let us anticipate which protocols will
+blend in better with background traffic or otherwise defeat deep packet
+inspection (DPI) algorithms.
+
+\bibliographystyle{plain} \bibliography{crypto2011-tor}
+\end{document}
+
+\end{document}
+
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