Author: phobos Date: 2011-04-29 14:09:29 +0000 (Fri, 29 Apr 2011) New Revision: 24688 Added: projects/presentations/2011-04-21-anonymity.pdf projects/presentations/2011-04-21-anonymity.tex Modified: projects/presentations/2011-slide-masters.odp projects/presentations/2011-slide-masters.pdf Log: update the 2011 slide masters Added: projects/presentations/2011-04-21-anonymity.pdf =================================================================== (Binary files differ) Property changes on: projects/presentations/2011-04-21-anonymity.pdf ___________________________________________________________________ Added: svn:mime-type + application/octet-stream Added: projects/presentations/2011-04-21-anonymity.tex =================================================================== --- projects/presentations/2011-04-21-anonymity.tex (rev 0) +++ projects/presentations/2011-04-21-anonymity.tex 2011-04-29 14:09:29 UTC (rev 24688) @@ -0,0 +1,265 @@ +\documentclass{beamer} +\mode<presentation> +\usetheme{Boadilla} +\title{Anonymity & Tor Overview} +\author{Andrew Lewman \\ andrew@torproject.org} +\date{\today} +\begin{document} + +\begin{frame} +\maketitle +\begin{center} +\includegraphics[height=3cm]{./images/2009-tor-logo} +\end{center} +\end{frame} + +\begin{frame} +\frametitle{What are we talking about?} +\begin{itemize} +\item Crash course on anonymous communications +\item Quick overview of Tor +\item Quick overview of Tor Hidden Services +\item Future directions +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{The Tor Project, Inc.} +501(c)(3) non-profit organization dedicated to the research and development of technologies for online anonymity and privacy +\begin{center} +\includegraphics[height=5cm]{./images/2009-oval_sticker_new} +\end{center} +\end{frame} + +\begin{frame} +\frametitle{What is anonymity?} +\includegraphics[width=10cm]{./images/2llg3ts} +\end{frame} + +\begin{frame} +\frametitle{Anonymity isn't cryptography} +\begin{itemize} +\item Cryptography protects the contents in transit +\item You still know who is talking to whom, how often, and how much data is sent. +\end{itemize} +\begin{center} +\includegraphics[width=5cm]{./images/encryption-cc-by-sa} +\end{center} +\end{frame} + +\begin{frame} +\frametitle{Anonymity isn't steganography} +Attacker can tell Alice is talking to someone, how often, and how much data is sent. +\bigskip + +\begin{center} +\includegraphics[width=5cm]{./images/steganography-cc-by-sa} +\end{center} +\end{frame} + +\begin{frame} +\frametitle{Anonymity isn't just wishful thinking...} +\begin{itemize} +\item "You can't prove it was me!" +\pause \item "Promise you won't look" +\pause \item "Promise you won't remember" +\pause \item "Promise you won't tell" +\pause \item "I didn't write my name on it!" +\pause \item "Isn't the Internet already anonymous?" +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{..since "weak" isn't anonymity.} +\begin{itemize} +\item \textit{"You can't prove it was me!"} Proof is a very \textbf{strong} word. Statistical analysis allows suspicion to become certainty. +\pause \item \textit{"Promise you won't look/remember/tell"} Will other parties have the abilities and incentives to keep these promises? +\pause \item \textit{"I didn't write my name on it!"} Not what we're talking about. +\pause \item \textit{"Isn't the Internet already anonymous?"} Nope! +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Anonymous communication} +\begin{itemize} +\item People have to hide in a crowd of other people ("anonymity loves company") +\item The goal of the system is to make all users look as similar as possible, to give a bigger crowd +\item Hide who is communicating with whom +\item Layered encryption and random delays hide correlation between input traffic and output traffic +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Low versus High-latency anonymous communication systems} +\begin{itemize} +\item Tor is not the first system; ZKS, mixmaster, single-hop proxies, Crowds, Java Anon Proxy. +\item Low-latency systems are vulnerable to end-to-end correlation attacks. +\item High-latency systems are more resistant to end-to-end correlation attacks, but by definition, less interactive. +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Low-latency systems are generally more attractive to today's user} +\begin{itemize} +\item Interactive apps: web, instant messaging, VOIP, ssh, X11, cifs/nfs, video streaming (millions of users) +\item Multi-hour delays: email, nntp, blog posting? (tens of thousands of users?) +\pause \item \begin{center}\begin{Large}And if anonymity loves company...\end{Large}\end{center} +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{What is Tor?} +\begin{itemize} +\item online anonymity software and network +\pause \item open source, freely available (3-clause BSD license) +\pause \item active research environment: \\ +Rice, UMN, NSF, NRL, Drexel, Waterloo, Cambridge UK, Bamberg Germany, Boston Univ, Harvard, MIT, RPI, Georgia Tech +\pause \item increasingly diverse toolset: \\ +Tor, Torbutton, Tor Browser Bundle, TA(I)LS LiveCD, Tor Weather, Tor auto-responder, Secure Updater, Orbot, Torora, Tor Check, Arm, Nymble, Tor Control, Tor Wall, TorVM +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{How is Tor different from other systems?} +\begin{overlayarea}{9cm}{6cm} +\only<1>{\includegraphics[height=7cm]{./images/single_hop_relay}} +\only<2>{\includegraphics[height=7cm]{./images/evil_single_hop_relay}} +\only<3>{\includegraphics[height=7cm]{./images/data_snooping_single_hop_relay}} +\end{overlayarea} +\end{frame} + +\begin{frame} +\frametitle{Twitter in Iran: Good.} +\includegraphics[scale=0.5]{./images/twitter-iran-protests-time} +\flushright{\tiny From http://www.time.com/time/world/article/0,8599,1905125,00.html} +\end{frame} + +\begin{frame} +\frametitle{Twitter in USA: Bad.} +\includegraphics[scale=0.45]{./images/twitter-g20-pittsburgh-gothamist} +\flushright{\tiny from http://gothamist.com/2009/10/05/fbi\_raids\_queens\_home\_in\_g20\_protes.php} +\end{frame} + +\begin{frame} +\frametitle{Who uses Tor?} +\parbox{8cm}{\sloppy \setbeamercolor{background}[\includegraphics[scale=0.35]{./images/anonymousman}} +\parbox{3cm}{\sloppy +\begin{flushleft} +\begin{itemize} +\begin{small} +\item Normal people +\item Law Enforcement +\item Human Rights Activists +\item Business Execs +\item Militaries +\item Abuse Victims +\end{small} +\end{itemize} +\end{flushleft} +} +\end{frame} + + +\begin{frame} +\frametitle{estimated 300k to 800k daily users} +\setbeamercolor{background}[\includegraphics[scale=0.4]{./images/huge-crowd}] +\end{frame} + +\begin{frame} +\frametitle{Tor hides communication patterns by relaying data through volunteer servers} +\begin{center} +\begin{overlayarea}{9cm}{6cm} +\only<1>{\includegraphics[width=9cm]{./images/tor-network}} +\only<2>{\includegraphics[width=9cm]{./images/tor-safe-selection}} +\only<3>{\includegraphics[width=9cm]{./images/tor-safe-path}} +\only<4>{\includegraphics[width=9cm]{./images/tor-keys1}} +\end{overlayarea} +\flushright +\tiny Diagram: Robert Watson +\end{center} +\end{frame} + +\begin{frame} +\frametitle{Vidalia Network Map} +\includegraphics[scale=0.4]{./images/vidalia-network-map} +\end{frame} + +\begin{frame} +\frametitle{Metrics} +\begin{itemize} +\item Measuring metrics anonymously +\item NSF grant to find out +\item Archive of hourly consensus, ExoneraTor, VisiTor +\item Metrics portal: \\ \url{https://metrics.torproject.org/} +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Tor hidden services allow privacy enhanced hosting of services} +\includegraphics[scale=0.5]{./images/hidden-federalist} +\end{frame} + +\begin{frame} +\frametitle{dot onion you say?} +\includegraphics[scale=0.6]{./images/Zookos-triangle} +\end{frame} + +\begin{frame} +\frametitle{Hidden services, in text} +\begin{itemize} +\item Distributed Hash Table (DHT) Directory +\pause \item Rendezvous points +\pause \item Anonymity for both the server and client +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Hidden Services, in graphics} +\begin{overlayarea}{9cm}{6cm} +\only<1>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-1}} +\only<2>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-2}} +\only<3>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-3}} +\only<4>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-4}} +\only<5>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-5}} +\only<6>{\includegraphics[scale=0.5]{../../website/trunk/images/THS-6}} +\end{overlayarea} +\end{frame} + +\begin{frame} +\frametitle{Operating Systems leak info like a sieve} +\parbox{5cm}{\sloppy \setbeamercolor{background}[\includegraphics[height=7cm]{./images/cropped-hijack-sign-south-africa}} +\parbox{5cm}{\begin{itemize} +\item Applications, network stacks, plugins, oh my.... +\pause some call this "sharing" +\pause \item Did you know Microsoft Word and OpenOffice Writer are browsers? +\pause \item \url{www.decloak.net} is a fine test +\end{itemize} +} +\end{frame} + +\begin{frame} +\frametitle{Mobile Operating Systems} +\begin{itemize} +\item Entirely new set of challenges for something designed to know where you are at all times. +\item Orbot: Tor on Android. \url{https://guardianproject.info/apps/} +\item Tor on iphone, maemo/meego, symbian, etc +\item Tor on Windows CE, \url{http://www.gsmk.de} as an example. +\item Guardian Project, \url{https://guardianproject.info/} +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Next steps} +Visit \url{https://www.torproject.org/} for more information, links, and ideas. +\end{frame} + +\begin{frame} +\frametitle{Credits \& Thanks} +\begin{itemize} +\item who uses tor? \url{http://www.flickr.com/photos/mattw/2336507468/siz}, Matt Westervelt, CC-­BY-­SA. +\item danger!, \url{http://flickr.com/photos/hmvh/58185411/sizes/o/}, hmvh, CC-­BY-­SA. +\item 500k, \url{http://www.flickr.com/photos/lukaskracic/334850378/sizes/l/}, Luka Skracic, used with permission. +\end{itemize} +\end{frame} + +\end{document} Property changes on: projects/presentations/2011-04-21-anonymity.tex ___________________________________________________________________ Added: svn:mime-type + text/x-tex Modified: projects/presentations/2011-slide-masters.odp =================================================================== (Binary files differ) Modified: projects/presentations/2011-slide-masters.pdf =================================================================== (Binary files differ)