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en/volunteer.wml 1) ## translation metadata
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en/volunteer.wml 2) # Revision: $Revision$
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volunteer.html 3)
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en/volunteer.wml 4) #include "head.wmi" TITLE="Tor: Volunteer"
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volunteer.html 5)
volunteer.html 6) <div class="main-column">
volunteer.html 7)
volunteer.html 8) <!-- PUT CONTENT AFTER THIS TAG -->
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en/volunteer.wml 9) <h2>Three things everyone can do now:</h2>
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volunteer.html 10) <ol>
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en/volunteer.wml 11) <li>Please consider <a href="<page docs/tor-doc-relay>">running
en/volunteer.wml 12) a relay</a> to help the Tor network grow.</li>
en/volunteer.wml 13) <li>Tell your friends! Get them to run relays. Get them to run hidden
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volunteer.html 14) services. Get them to tell their friends.</li>
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en/volunteer.wml 15) <li>We are looking for funding and sponsors. If you like Tor's goals, please
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a short paragraph of explan...
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en/volunteer.wml 16) <a href="<page donate>">take a moment to donate to support further
en/volunteer.wml 17) Tor development</a>. Also, if you know any
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en/volunteer.wml 18) companies, NGOs, agencies, or other organizations that want communications
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en/volunteer.wml 19) security, let them know about us.</li>
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volunteer.html 20) </ol>
volunteer.html 21)
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en/volunteer.wml 22) <a id="Usability"></a>
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en/volunteer.wml 23) <h2><a class="anchor" href="#Usability">Supporting Applications</a></h2>
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volunteer.html 24) <ol>
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en/volunteer.wml 25) <li>We need good ways to intercept DNS requests so they don't "leak" their
en/volunteer.wml 26) request to a local observer while we're trying to be anonymous. (This
en/volunteer.wml 27) happens because the application does the DNS resolve before going to
en/volunteer.wml 28) the SOCKS proxy.)</li>
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en/volunteer.wml 29) <li>Tsocks/dsocks items:
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en/volunteer.wml 30) <ul>
en/volunteer.wml 31) <li>We need to <a
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en/volunteer.wml 32) href="https://wiki.torproject.org/noreply/TheOnionRouter/TSocksPatches">apply
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en/volunteer.wml 33) all our tsocks patches</a> and maintain a new fork. We'll host it if
en/volunteer.wml 34) you want.</li>
en/volunteer.wml 35) <li>We should patch Dug Song's "dsocks" program to use Tor's
en/volunteer.wml 36) <i>mapaddress</i> commands from the controller interface, so we
en/volunteer.wml 37) don't waste a whole round-trip inside Tor doing the resolve before
en/volunteer.wml 38) connecting.</li>
en/volunteer.wml 39) <li>We need to make our <i>torify</i> script detect which of tsocks or
en/volunteer.wml 40) dsocks is installed, and call them appropriately. This probably means
en/volunteer.wml 41) unifying their interfaces, and might involve sharing code between them
en/volunteer.wml 42) or discarding one entirely.</li>
en/volunteer.wml 43) </ul>
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en/volunteer.wml 44) </li>
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en/volunteer.wml 45) <li>People running relays tell us they want to have one BandwidthRate
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en/volunteer.wml 46) during some part of the day, and a different BandwidthRate at other
en/volunteer.wml 47) parts of the day. Rather than coding this inside Tor, we should have a
en/volunteer.wml 48) little script that speaks via the <a href="<page gui/index>">Tor
en/volunteer.wml 49) Controller Interface</a>, and does a setconf to change the bandwidth
en/volunteer.wml 50) rate. There is one for Unix and Mac already (it uses bash and cron),
en/volunteer.wml 51) but Windows users still need a solution.
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en/volunteer.wml 52) </li>
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en/volunteer.wml 53) <li>Tor can <a
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en/volunteer.wml 54) href="https://wiki.torproject.org/noreply/TheOnionRouter/TorFAQ#ChooseEntryExit">exit
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en/volunteer.wml 55) the Tor network from a particular exit node</a>, but we should be able
en/volunteer.wml 56) to specify just a country and have something automatically pick. The
en/volunteer.wml 57) best bet is to fetch Blossom's directory also, and run a local Blossom
en/volunteer.wml 58) client that fetches this directory securely (via Tor and checking its
en/volunteer.wml 59) signature), intercepts <tt>.country.blossom</tt> hostnames, and does
en/volunteer.wml 60) the right thing.</li>
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volunteer.html 61) <li>Speaking of geolocation data, somebody should draw a map of the Earth
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en/volunteer.wml 62) with a pin-point for each Tor relay. Bonus points if it updates as the
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en/volunteer.wml 63) network grows and changes. Unfortunately, the easy ways to do this involve
en/volunteer.wml 64) sending all the data to Google and having them draw the map for you. How
en/volunteer.wml 65) much does this impact privacy, and do we have any other good options?</li>
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volunteer.html 66) </ol>
volunteer.html 67)
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en/volunteer.wml 68) <a id="Documentation"></a>
en/volunteer.wml 69) <h2><a class="anchor" href="#Documentation">Documentation</a></h2>
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volunteer.html 70) <ol>
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en/volunteer.wml 71) <li>Please help Matt Edman with the documentation and how-tos for his
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en/volunteer.wml 72) Tor controller,
en/volunteer.wml 73) <a href="http://vidalia-project.net/">Vidalia</a>.</li>
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en/volunteer.wml 74) <li>Evaluate and document
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en/volunteer.wml 75) <a href="https://wiki.torproject.org/wiki/TheOnionRouter/TorifyHOWTO">our
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en/volunteer.wml 76) list of programs</a> that can be configured to use Tor.</li>
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volunteer.html 77) <li>We need better documentation for dynamically intercepting
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en/volunteer.wml 78) connections and sending them through Tor. tsocks (Linux), dsocks (BSD),
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en/volunteer.wml 79) and freecap (Windows) seem to be good candidates, as would better
en/volunteer.wml 80) use of our new TransPort feature.</li>
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en/volunteer.wml 81) <li>We have a huge list of <a href="https://wiki.torproject.org/noreply/TheOnionRouter/SupportPrograms">potentially useful
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volunteer.html 82) programs that interface to Tor</a>. Which ones are useful in which
volunteer.html 83) situations? Please help us test them out and document your results.</li>
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en/volunteer.wml 84) <li>Help translate the web page and documentation into other
en/volunteer.wml 85) languages. See the <a href="<page translation>">translation
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en/volunteer.wml 86) guidelines</a> if you want to help out. We especially need Arabic or
en/volunteer.wml 87) Farsi translations, for the many Tor users in censored areas.</li>
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volunteer.html 88) </ol>
volunteer.html 89)
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en/volunteer.wml 90) <a id="Coding"></a>
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en/volunteer.wml 91) <a id="Summer"></a>
en/volunteer.wml 92) <a id="Projects"></a>
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en/volunteer.wml 93) <h2><a class="anchor" href="#Projects">Good Coding Projects</a></h2>
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en/volunteer.wml 94) <ol>
en/volunteer.wml 95)
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and four projects from matt
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en/volunteer.wml 96) <li>
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en/volunteer.wml 97) <b>Tor/Polipo/Vidalia Auto-Update Framework</b>
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and four projects from matt
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en/volunteer.wml 98) <br />
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en/volunteer.wml 99) Priority: <i>High</i>
en/volunteer.wml 100) <br />
en/volunteer.wml 101) Effort Level: <i>High</i>
en/volunteer.wml 102) <br />
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en/volunteer.wml 103) Skill Level: <i>High</i>
en/volunteer.wml 104) <br />
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en/volunteer.wml 105) Likely Mentors: <i>Matt, others</i>
en/volunteer.wml 106) <br />
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en/volunteer.wml 107) Vidalia already has the ability to notice when the user is running an
en/volunteer.wml 108) outdated or unrecommended version of Tor. Currently, Vidalia simply pops
en/volunteer.wml 109) up a little message box that lets the user know they should manually
en/volunteer.wml 110) upgrade. The goal of this project would be to extend Vidalia with the
en/volunteer.wml 111) ability to also fetch and install the updated Tor software for the
en/volunteer.wml 112) user. Time permitting, we would also like to be able to update other
en/volunteer.wml 113) applications included in the bundled installers, such as Polipo and
en/volunteer.wml 114) Vidalia itself.
en/volunteer.wml 115) <br />
en/volunteer.wml 116) To complete this project, the student will first need to first investigate
en/volunteer.wml 117) the existing auto-update frameworks (e.g., Sparkle on OS X) to evaluate
en/volunteer.wml 118) their strengths, weaknesses, security properties, and ability to be
en/volunteer.wml 119) integrated into Vidalia. If none are found to be suitable, the student
en/volunteer.wml 120) will design their own auto-update framework, document the design, and
en/volunteer.wml 121) then discuss the design with other developers to assess any security
en/volunteer.wml 122) issues. The student will then implement their framework (or integrate
en/volunteer.wml 123) an existing one) and test it.
en/volunteer.wml 124) <br />
en/volunteer.wml 125) A student undertaking this project should have good C++ development
en/volunteer.wml 126) experience. Previous experience with Qt is helpful, but not required. The
en/volunteer.wml 127) student should also have a basic understanding of common security
en/volunteer.wml 128) practices, such as package signature verification. Good writing ability
en/volunteer.wml 129) is also important for this project, since a vital step of the project
en/volunteer.wml 130) will be producing a design document for others to review and discuss
en/volunteer.wml 131) with the student prior to implementation.
en/volunteer.wml 132) </li>
en/volunteer.wml 133)
en/volunteer.wml 134) <li>
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en/volunteer.wml 135) <b>An Improved and More Usable Network Map</b>
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en/volunteer.wml 136) <br />
en/volunteer.wml 137) One of Vidalia's existing features is a network map that shows the user
en/volunteer.wml 138) the approximate geographic location of relays in the Tor network and
en/volunteer.wml 139) plots the paths the user's traffic takes as it is tunneled through the
en/volunteer.wml 140) Tor network. The map is currently not very interactive and has rather
en/volunteer.wml 141) poor graphics. Instead, we would like to leverage KDE's Marble widget
en/volunteer.wml 142) that gives us a better quality map and enables improved interactivity,
en/volunteer.wml 143) such as allowing the user to click on individual relays or circuits to
en/volunteer.wml 144) display additional information. We might also consider adding the ability
en/volunteer.wml 145) for users to click on a particular relay or a country containing one or
en/volunteer.wml 146) more Tor exit relays and say, ``I want my connections to foo.com to exit
en/volunteer.wml 147) from here.''
en/volunteer.wml 148) <br />
en/volunteer.wml 149) This project will first involve the student getting familiar with Vidalia
en/volunteer.wml 150) and the Marble widget's API. The student will then integrate the widget
en/volunteer.wml 151) into Vidalia and customize Marble to be better suited for our application,
en/volunteer.wml 152) such as making circuits clickable, storing cached map data in Vidalia's
en/volunteer.wml 153) own data directory, and customizing some of the widget's dialogs.
en/volunteer.wml 154) <br />
en/volunteer.wml 155) A student undertaking this project should have good C++ development
en/volunteer.wml 156) experience. Previous experience with Qt and CMake is helpful, but not
en/volunteer.wml 157) required.
en/volunteer.wml 158) </li>
en/volunteer.wml 159)
en/volunteer.wml 160) <li>
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en/volunteer.wml 161) <b>Better Debian Packaging and Debian Packaging Support</b>
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en/volunteer.wml 162) <br />
en/volunteer.wml 163) Vidalia currently doesn't play nicely on Debian and Ubuntu with the
en/volunteer.wml 164) default Tor packages. The current Tor packages automatically start Tor
en/volunteer.wml 165) as a daemon running as the debian-tor user and (sensibly) do not have a
en/volunteer.wml 166) CntrolPort defined in the default torrc. Consequently, Vidalia will try
en/volunteer.wml 167) to start its own Tor process since it could not connect to the existing
en/volunteer.wml 168) Tor, and then Vidalia's Tor process will then exit with an error message
en/volunteer.wml 169) the user likely doesn't understand since Tor cannot bind its listening
en/volunteer.wml 170) ports--they're already in use by the original Tor daemon.
en/volunteer.wml 171) <br />
en/volunteer.wml 172) The current solution involves either telling the user to stop the
en/volunteer.wml 173) existing Tor daemon and let Vidalia start its own Tor process, or
en/volunteer.wml 174) explaining to the user how to set a control port and password in their
en/volunteer.wml 175) torrc. A better solution on Debian would be to use Tor's ControlSocket,
en/volunteer.wml 176) which allows Vidalia to talk to Tor via a Unix domain socket, and could
en/volunteer.wml 177) possibly be enabled by default in Tor's Debian packages. Vidalia can
en/volunteer.wml 178) then authenticate to Tor using cookie authentication if the user running
en/volunteer.wml 179) Vidalia is also in the debian-tor group.
en/volunteer.wml 180) <br />
en/volunteer.wml 181) This project will first involve adding support for Tor's ControlSocket
en/volunteer.wml 182) to Vidalia. The student will then develop and test Debian and Ubuntu
en/volunteer.wml 183) packages for Vidalia that conform to Debian's packaging standards and
en/volunteer.wml 184) making sure it works well with the existing Tor packages. We can also
en/volunteer.wml 185) set up an apt repository to host the new Vidalia packages.
en/volunteer.wml 186) <br />
en/volunteer.wml 187) A student undertaking this project should have prior knowledge of
en/volunteer.wml 188) Debian package management and some C++ development experience. Previous
en/volunteer.wml 189) experience with Qt is helpful, but not required.
en/volunteer.wml 190) </li>
en/volunteer.wml 191)
en/volunteer.wml 192) <li>
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en/volunteer.wml 193) <b>Tor Status Event Interface</b>
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en/volunteer.wml 194) <br />
en/volunteer.wml 195) There may are a number of status changes of which the user may need
en/volunteer.wml 196) to be informed. For example, if the user is trying to set up a Tor
en/volunteer.wml 197) relay and Tor decides the user's relay is not reachable from outside
en/volunteer.wml 198) the user's network, we should alert the user. Currently, all the user
en/volunteer.wml 199) gets is a couple log messages in Vidalia's 'message log', which they
en/volunteer.wml 200) likely never see since they don't receive a notification that something
en/volunteer.wml 201) has gone wrong. Even if the user does actually look at the message log,
en/volunteer.wml 202) most of the messages make little sense to the novice user.
en/volunteer.wml 203) <br />
en/volunteer.wml 204) Tor has the ability to inform Vidalia of many such status changes, and
en/volunteer.wml 205) we recently implemented support for a couple of these events. Still,
en/volunteer.wml 206) there are many more status events the user should be informed of and we
en/volunteer.wml 207) need a better UI for actually displaying them to the user.
en/volunteer.wml 208) <br />
en/volunteer.wml 209) The goal of this project then is to design and implement a UI for
en/volunteer.wml 210) displaying Tor status events to the user. For example, we might put a
en/volunteer.wml 211) little badge on Vidalia's tray icon that alerts the user to new status
en/volunteer.wml 212) events they should look at. Double-clicking the icon could bring up a
en/volunteer.wml 213) dialog that summarizes recent status events in simple terms and maybe
en/volunteer.wml 214) suggests a remedy for any negative statuses if they can be corrected by
en/volunteer.wml 215) the user. Of course, this is just an example and the student is free to
en/volunteer.wml 216) suggest another approach.
en/volunteer.wml 217) <br />
en/volunteer.wml 218) A student undertaking this project should have good UI design and layout
en/volunteer.wml 219) experience and some C++ development experience. Previous experience
en/volunteer.wml 220) with Qt and Qt's Designer will be very helpful, but not required. Some
en/volunteer.wml 221) English writing ability will also be useful, since this project will
en/volunteer.wml 222) likely involve writing small amounts of help documentation that should
en/volunteer.wml 223) be understandable by non-technical users. Bonus points for some graphic
en/volunteer.wml 224) design/Photoshop fu, since we might want/need some shiny new icons too.
en/volunteer.wml 225) </li>
en/volunteer.wml 226)
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en/volunteer.wml 227) <li>
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en/volunteer.wml 228) <b>A Translation Wiki</b>
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en/volunteer.wml 229) <br />
en/volunteer.wml 230) We require a way to edit and translate sections of the website —
en/volunteer.wml 231) possibly resulting in a patch for the official svn tree. The current
en/volunteer.wml 232) "cost" of publication of website changes is quite high even for English
en/volunteer.wml 233) language users. They need to check out our template files, translate them
en/volunteer.wml 234) and send us the translation. For a single word change or any type of
en/volunteer.wml 235) minor change, the page may never be corrected or translated. It would
en/volunteer.wml 236) be nice to have a wiki that was specifically geared towards translation
en/volunteer.wml 237) and would somehow track the upstream (English) versions to indicate when
en/volunteer.wml 238) a fresh translation is needed. This seems mostly like a job for a wiki
en/volunteer.wml 239) integrator or wiki software author. Certainly the person would need to
en/volunteer.wml 240) be interested in human languages and translation. They should at least
en/volunteer.wml 241) be minimally familiar with what Tor is but would not have to interact
en/volunteer.wml 242) with the software, only the documentation on the website.
en/volunteer.wml 243) </li>
en/volunteer.wml 244)
en/volunteer.wml 245) <li>
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en/volunteer.wml 246) <b>Improvements on our active browser configuration tester</b> -
en/volunteer.wml 247) <a href="https://check.torproject.org">https://check.torproject.org</a>
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en/volunteer.wml 248) <br />
en/volunteer.wml 249) We currently have a functional web page to detect if Tor is working. It
en/volunteer.wml 250) is has a few places where it falls short. It requires improvements with
en/volunteer.wml 251) regard to default languages and functionality. It currently only responds
en/volunteer.wml 252) in English. In addition, it is a hack of a perl script that should have
en/volunteer.wml 253) never seen the light of day. It should probably be rewritten in python
en/volunteer.wml 254) with multi-lingual support in mind. It currently uses the Tor DNS exit
en/volunteer.wml 255) list and should continue to do so in the future. It may result in certain
en/volunteer.wml 256) false positives and these should be discovered, documented, and fixed
en/volunteer.wml 257) where possible. Anyone working on this project should be interested in
en/volunteer.wml 258) DNS, basic perl or preferably python programming skills and will have
en/volunteer.wml 259) to interact minimally with Tor to test their code.
en/volunteer.wml 260) </li>
en/volunteer.wml 261)
en/volunteer.wml 262) <li>
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en/volunteer.wml 263) <b>Improvements on our DNS Exit List service</b> -
en/volunteer.wml 264) <a href="http://exitlist.torproject.org">http://exitlist.torproject.org</a>
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four more items from jake
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en/volunteer.wml 265) <br />
en/volunteer.wml 266) The exitlist software is written by our fabulous anonymous
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en/volunteer.wml 267) contributer Tup. It's a DNS server written in Haskell that supports part of our <a
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en/volunteer.wml 268) href="https://www.torproject.org/svn/trunk/doc/contrib/torel-design.txt">exitlist
en/volunteer.wml 269) design document</a>. Currently, it's functional and it is used by
en/volunteer.wml 270) check.torproject.org and other users. The issues that are outstanding
en/volunteer.wml 271) are mostly aesthetic. This wonderful service could use a much better
en/volunteer.wml 272) website using the common Tor theme. It would be best served with better
en/volunteer.wml 273) documentation for common services that use an RBL. It could use more
en/volunteer.wml 274) publicity. A person working on this project should be interested in DNS,
en/volunteer.wml 275) basic RBL configuration for popular services, and writing documentation.
en/volunteer.wml 276) The person would require minimal Tor interaction — testing their
en/volunteer.wml 277) own documentation at the very least. Furthermore, it would be useful
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en/volunteer.wml 278) if they were interested in Haskell and wanted to implement more of the
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en/volunteer.wml 279) torel-design.txt suggestions.
en/volunteer.wml 280) </li>
en/volunteer.wml 281)
en/volunteer.wml 282) <li>
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en/volunteer.wml 283) <b>Testing integration of Tor with web browsers for our end users</b>
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en/volunteer.wml 284) <br />
en/volunteer.wml 285) The Tor project currently lacks a solid test to ensure that a
en/volunteer.wml 286) user has a properly configured web browser. It should test for as
en/volunteer.wml 287) many known issues as possible. It should attempt to decloak the
en/volunteer.wml 288) user in any way possible. Two current webpages that track these
en/volunteer.wml 289) kinds of issues are run by Greg and HD Moore. Greg keeps a nice <a
en/volunteer.wml 290) href="http://pseudo-flaw.net/tor/torbutton/">list of issues along
en/volunteer.wml 291) with their proof of concept code, bug issues, etc</a>. HD Moore runs
en/volunteer.wml 292) the <a href="http://metasploit.com/research/misc/decloak/">metasploit
en/volunteer.wml 293) decloak website</a>. A person interested in attacking Tor could start
en/volunteer.wml 294) by collecting as many workable and known methods for decloaking a
en/volunteer.wml 295) Tor user. The person should be familiar with the common pitfalls but
en/volunteer.wml 296) possibly have new methods in mind for implementing decloaking issues. The
en/volunteer.wml 297) website should ensure that it tells a user what their problem is. It
en/volunteer.wml 298) should help them to fix the problem or direct them to the proper support
en/volunteer.wml 299) channels. The person should be closely familiar with using Tor and how
en/volunteer.wml 300) to prevent Tor leakage.
en/volunteer.wml 301) </li>
en/volunteer.wml 302)
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en/volunteer.wml 303) <li>
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en/volunteer.wml 304) <b>Improving our ability to be resistant to censorship</b>
en/volunteer.wml 305) <br />
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en/volunteer.wml 306) Tor needs even better censorship resistance mechanisms. There are
en/volunteer.wml 307) several mechanisms that can help. Tor should be able listen on multiple
en/volunteer.wml 308) addresses and ports, and allow clients to connect to all of them.
en/volunteer.wml 309) Tor should be able to appear like a webserver (HTTP or HTTPS) when
en/volunteer.wml 310) contacted by port-scanning tools.
en/volunteer.wml 311) </li>
en/volunteer.wml 312)
en/volunteer.wml 313) <li>
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en/volunteer.wml 314) <b>Libevent and Tor integration improvements</b>
en/volunteer.wml 315) <br />
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en/volunteer.wml 316) Tor should make better use of the more recent features of Niels Provos's
en/volunteer.wml 317) Libevent library. Libevent already provides HTTP and socket buffers;
en/volunteer.wml 318) Tor's code for those could be replaced. We'll need to improve libevent's
en/volunteer.wml 319) code as needed; particularly, to add good openssl support on top of
en/volunteer.wml 320) libevent's buffer abstraction.
en/volunteer.wml 321) </li>
en/volunteer.wml 322)
en/volunteer.wml 323) <li>
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en/volunteer.wml 324) <b>Tuneup Tor!</b>
en/volunteer.wml 325) <br />
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en/volunteer.wml 326) Tor should possibly measure bandwidth in a distributed way, as in the
en/volunteer.wml 327) <a href="http://freehaven.net/anonbib/">"A Tuneup for Tor"</a> paper
en/volunteer.wml 328) by Snader and Borisov. A student could use current testing code to
en/volunteer.wml 329) double-check this paper's findings and verify the extent to which they
en/volunteer.wml 330) dovetail with Tor in the wild, and determine good ways to incorporate them
en/volunteer.wml 331) into the Tor network without adding undesirable n^2 traffic properties
en/volunteer.wml 332) at the directory authorities.
en/volunteer.wml 333) </li>
en/volunteer.wml 334)
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en/volunteer.wml 335) <li>
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en/volunteer.wml 336) <b>Improving the Tor QA process: Continuous Integration for Windows builds</b>
en/volunteer.wml 337) <br />
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en/volunteer.wml 338) It would be useful to have automated build processes for Windows and
en/volunteer.wml 339) probably other platforms. The purpose of having a continuous integration
en/volunteer.wml 340) build environment is to ensure that Windows isn't left behind for any of
en/volunteer.wml 341) the software projects used in the Tor project or its accompanying.<br />
en/volunteer.wml 342) Buildbot may be a good choice for this as it appears to support all of
en/volunteer.wml 343) the platforms Tor does. See the
en/volunteer.wml 344) <a href="http://en.wikipedia.org/wiki/BuildBot">wikipedia entry for
en/volunteer.wml 345) buildbot</a>.<br />
en/volunteer.wml 346) There may be better options and the person undertaking this task should
en/volunteer.wml 347) evaluate other options. Any person working on this automatic build
en/volunteer.wml 348) process should have experience or be willing to learn how to build all
en/volunteer.wml 349) of the respective Tor related code bases from scratch. Furthermore, the
en/volunteer.wml 350) person should have some experience building software in Windows
en/volunteer.wml 351) environments as this is the target audience we want to ensure we do not
en/volunteer.wml 352) leave behind. It would require close work with the Tor source code but
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en/volunteer.wml 353) probably only in the form of building, not authoring.<br />
en/volunteer.wml 354) Additionally, we need to automate our performance testing for all platforms.
en/volunteer.wml 355) We've got buildbot (except on Windows — as noted above) to automate
en/volunteer.wml 356) our regular integration and compile testing already,
en/volunteer.wml 357) but we need to get our network simulation tests (as built in torflow)
en/volunteer.wml 358) updated for more recent versions of Tor, and designed to launch a test
en/volunteer.wml 359) network either on a single machine, or across several, so we can test
en/volunteer.wml 360) changes in performance on machines in different roles automatically.<br />
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en/volunteer.wml 361) </li>
en/volunteer.wml 362)
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en/volunteer.wml 363) <li>
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en/volunteer.wml 364) <b>Improve our unit testing process</b>
en/volunteer.wml 365) <br />
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en/volunteer.wml 366) Tor needs to be far more tested. This is a multi-part effort. To start
en/volunteer.wml 367) with, our unit test coverage should rise substantially, especially in
en/volunteer.wml 368) the areas outside the utility functions. This will require significant
en/volunteer.wml 369) refactoring of some parts of Tor, in order to dissociate as much logic
en/volunteer.wml 370) as possible from globals.<br />
en/volunteer.wml 371) Additionally, we need to automate our performance testing. We've got
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en/volunteer.wml 372) buildbot (except on Windows — see above) to automate our regular
en/volunteer.wml 373) integration and compile testing already,
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en/volunteer.wml 374) but we need to get our network simulation tests (as built in torflow)
en/volunteer.wml 375) updated for more recent versions of Tor, and designed to launch a test
en/volunteer.wml 376) network either on a single machine, or across several, so we can test
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en/volunteer.wml 377) changes in performance on machines in different roles automatically.<br />
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en/volunteer.wml 378) </li>
en/volunteer.wml 379)
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en/volunteer.wml 380) <li>
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en/volunteer.wml 381) <b>Help revive the Java community around Tor</b>
en/volunteer.wml 382) <br />
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en/volunteer.wml 383) Reanimate one of the approaches to implement a Tor client in Java,
en/volunteer.wml 384) e.g. the <a href="http://onioncoffee.sourceforge.net/">OnionCoffee
en/volunteer.wml 385) project</a>, and make it run on <a
en/volunteer.wml 386) href="http://code.google.com/android/">Android</a>. The first step
en/volunteer.wml 387) would be to port the existing code and execute it in an Android
en/volunteer.wml 388) environment. Next, the code should be updated to support the newer Tor
en/volunteer.wml 389) protocol versions like the <a href="<svnsandbox>doc/spec/dir-spec.txt">v3
en/volunteer.wml 390) directory protocol</a>. Further, support for requesting or even
en/volunteer.wml 391) providing Tor hidden services would be neat, but not required. The
en/volunteer.wml 392) student should be able to understand and write new Java code, including
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en/volunteer.wml 393) a Java cryptography API. Being able to read C code would be helpful,
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en/volunteer.wml 394) too. The student should be willing to read the existing documentation,
en/volunteer.wml 395) implement code based on it, and, if required, refine the documentation
en/volunteer.wml 396) if things are underdocumented. This project is mostly about coding and
en/volunteer.wml 397) to a small degree about design.
en/volunteer.wml 398) </li>
en/volunteer.wml 399)
en/volunteer.wml 400) <li>
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en/volunteer.wml 401) <b>Become the PuppeTor Master</b>
en/volunteer.wml 402) <br />
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en/volunteer.wml 403) Write a tool that runs automatic system tests in addition
en/volunteer.wml 404) to the existing unit tests. The Java-based Tor simulator <a
en/volunteer.wml 405) href="https://tor-svn.freehaven.net/svn/puppetor/trunk/">PuppeTor</a>
en/volunteer.wml 406) might be a good start for starting up a private Tor network, using it
en/volunteer.wml 407) for a while, and verifying that at least parts of it are working. This
en/volunteer.wml 408) project requires to conceive a blueprint for performing system tests
en/volunteer.wml 409) of private Tor networks, before starting to code. Typical types of
en/volunteer.wml 410) tests range from performing single requests over the private network to
en/volunteer.wml 411) manipulating exchanged messages and see if nodes handle corrupt messages
en/volunteer.wml 412) appropriately. The student should be able to obtain a good understanding
en/volunteer.wml 413) of how Tor works and what problems and bugs could arise to design good
en/volunteer.wml 414) test cases. Understanding the existing Tor code and documentation is
en/volunteer.wml 415) vital. If PuppeTor is used, the student should also be able to understand
en/volunteer.wml 416) and possibly extend an existing Java application. This project is partly
en/volunteer.wml 417) about design and partly about coding.
en/volunteer.wml 418) </li>
en/volunteer.wml 419)
en/volunteer.wml 420) <li>
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en/volunteer.wml 421) <b>Bring moniTor to life</b>
en/volunteer.wml 422) <br />
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en/volunteer.wml 423) Implement a <a href="http://www.ss64.com/bash/top.html">top-like</a>
en/volunteer.wml 424) management tool for Tor relays. The purpose of such a tool would be
en/volunteer.wml 425) to monitor a local Tor relay via its control port and include useful
en/volunteer.wml 426) system information of the underlying machine. When running this tool, it
en/volunteer.wml 427) would dynamically update its content like top does for Linux processes.
en/volunteer.wml 428) <a href="http://archives.seul.org/or/dev/Jan-2008/msg00005.html">This
en/volunteer.wml 429) or-dev post</a> might be a good first read. The student should be familiar
en/volunteer.wml 430) with or willing to learn about administering a Tor relay and configuring
en/volunteer.wml 431) it via its control port. As an initial prototype is written in Python,
en/volunteer.wml 432) some knowledge about writing Python code would be helpful, too. This
en/volunteer.wml 433) project is for the one part about identifying requirements to such a
en/volunteer.wml 434) tool and designing its interface; but on the other part, the project
en/volunteer.wml 435) also requires a lot of coding.
en/volunteer.wml 436) </li>
en/volunteer.wml 437)
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en/volunteer.wml 438) <li>
en/volunteer.wml 439) <b>TorFlow improvements</b>
en/volunteer.wml 440) <br />
en/volunteer.wml 441) Help Mike Perry on his <a
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en/volunteer.wml 442) href="https://www.torproject.org/svn/torflow/">TorFlow</a>
en/volunteer.wml 443) library (<a href="https://www.torproject.org/svn/torflow/TODO">TODO</a>):
en/volunteer.wml 444) it's a python library that uses the <a
en/volunteer.wml 445) href="https://www.torproject.org/svn/torctl/doc/howto.txt">Tor controller
en/volunteer.wml 446) protocol</a> to instruct Tor to build circuits in a variety of ways,
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en/volunteer.wml 447) and then it measures performance and tries to detect anomalies.
en/volunteer.wml 448) Help detect bad relays and automatically get that
en/volunteer.wml 449) info to the directory authorities for realtime blacklisting.
en/volunteer.wml 450)
en/volunteer.wml 451) <li>
en/volunteer.wml 452) <b>Help track the overall Tor Network status</b>
en/volunteer.wml 453) Torstatus. Set up an automated system for tracking network health
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en/volunteer.wml 454) over time, graphing it, etc. Better metrics for assessing network
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en/volunteer.wml 455) health and growth. Make it short and simple. Unbloated and easy to audit.
en/volunteer.wml 456) </li>
en/volunteer.wml 457)
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en/volunteer.wml 458) <li>vidalia and upnp</li>
en/volunteer.wml 459) <li>nymble</li>
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en/volunteer.wml 460)
en/volunteer.wml 461) <li>
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en/volunteer.wml 462) <b>Porting Polipo to Windows</b>
en/volunteer.wml 463) <br />
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en/volunteer.wml 464) Help port <a
en/volunteer.wml 465) href="http://www.pps.jussieu.fr/~jch/software/polipo/">Polipo</a> to
en/volunteer.wml 466) Windows. 1) handle spaces in path names and understand the filesystem
en/volunteer.wml 467) namespace — namespace meaning where application data, personal data,
en/volunteer.wml 468) and program data typically reside in various versions of Windows. 2) the
en/volunteer.wml 469) ability to handle ipv6 communications. 3) the ability to asynchronously
en/volunteer.wml 470) query name servers, find the system nameservers, and manage netbios
en/volunteer.wml 471) and dns queries. 4) use native regex capabilities of Windows, rather
en/volunteer.wml 472) than using 3rd party GNU regex libraries. 5) manage events and buffers
en/volunteer.wml 473) natively (i.e. in Unix-like OSes, Polipo defaults to 25% of ram, in
en/volunteer.wml 474) Windows it's whatever the config specifies). 6) some sort of GUI config
en/volunteer.wml 475) and reporting tool, bonus if it has a systray icon with right clickable
en/volunteer.wml 476) menu options. Double bonus if it's cross-platform compatible.
en/volunteer.wml 477) </li>
en/volunteer.wml 478)
en/volunteer.wml 479) <li>
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en/volunteer.wml 480) <b>Make our diagrams beautiful and automated</b>
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en/volunteer.wml 481) <br />
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en/volunteer.wml 482) a way to generate the website diagrams from source, so we can translate
en/volunteer.wml 483) them as utf-8 text rather than with gimp. (svg? or imagemagick?)
en/volunteer.wml 484) integrate this with a wml file so translations are easy and images are
en/volunteer.wml 485) generated in multiple languages at web publish
en/volunteer.wml 486) </li>
en/volunteer.wml 487)
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en/volunteer.wml 488) <li>
en/volunteer.wml 489) <b>Improve the LiveCD offerings for the Tor community</b>
en/volunteer.wml 490) <br />
en/volunteer.wml 491) How can we make the <a
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en/volunteer.wml 492) href="http://anonymityanywhere.com/incognito/">Incognito LiveCD</a>
en/volunteer.wml 493) easier to maintain, improve, and document?</li>
en/volunteer.wml 494) <li>We need a distributed testing framework. We have unit tests,
en/volunteer.wml 495) but it would be great to have a script that starts up a Tor network, uses
en/volunteer.wml 496) it for a while, and verifies that at least parts of it are working.</li>
en/volunteer.wml 497)
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en/volunteer.wml 498) <li>
en/volunteer.wml 499) <b>Bring up new ideas!</b>
en/volunteer.wml 500) <br />
en/volunteer.wml 501) Don't like any of these? Look at the <a
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en/volunteer.wml 502) href="<svnsandbox>doc/design-paper/roadmap-future.pdf">Tor development
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en/volunteer.wml 503) roadmap</a> for more ideas.<br /><br />
en/volunteer.wml 504) Don't see your idea here? We probably need it anyway! Contact
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en/volunteer.wml 505) us and find out.</li>
en/volunteer.wml 506) </ol>
en/volunteer.wml 507)
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en/volunteer.wml 508) <h2><a class="anchor" href="#Coding">Coding and Design</a></h2>
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volunteer.html 509) <ol>
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en/volunteer.wml 510) <li>Tor relays don't work well on Windows XP. On
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en/volunteer.wml 511) Windows, Tor uses the standard <tt>select()</tt> system
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en/volunteer.wml 512) call, which uses space in the non-page pool. This means
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en/volunteer.wml 513) that a medium sized Tor relay will empty the non-page pool, <a
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en/volunteer.wml 514) href="https://wiki.torproject.org/noreply/TheOnionRouter/WindowsBufferProblems">causing
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en/volunteer.wml 515) havoc and system crashes</a>. We should probably be using overlapped IO
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en/volunteer.wml 516) instead. One solution would be to teach <a
en/volunteer.wml 517) href="http://www.monkey.org/~provos/libevent/">libevent</a> how to use
en/volunteer.wml 518) overlapped IO rather than select() on Windows, and then adapt Tor to
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en/volunteer.wml 519) the new libevent interface. Christian King made a
en/volunteer.wml 520) <a href="https://tor-svn.freehaven.net/svn/libevent-urz/trunk/">good
en/volunteer.wml 521) start</a> on this last summer.</li>
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en/volunteer.wml 522) <li>We need to actually start building our <a href="<page
en/volunteer.wml 523) documentation>#DesignDoc">blocking-resistance design</a>. This involves
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en/volunteer.wml 524) fleshing out the design, modifying many different pieces of Tor, adapting
en/volunteer.wml 525) <a href="http://vidalia-project.net/">Vidalia</a> so it supports the
en/volunteer.wml 526) new features, and planning for deployment.</li>
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en/volunteer.wml 527) <li>We need a flexible simulator framework for studying end-to-end
en/volunteer.wml 528) traffic confirmation attacks. Many researchers have whipped up ad hoc
en/volunteer.wml 529) simulators to support their intuition either that the attacks work
en/volunteer.wml 530) really well or that some defense works great. Can we build a simulator
en/volunteer.wml 531) that's clearly documented and open enough that everybody knows it's
en/volunteer.wml 532) giving a reasonable answer? This will spur a lot of new research.
en/volunteer.wml 533) See the entry <a href="#Research">below</a> on confirmation attacks for
en/volunteer.wml 534) details on the research side of this task — who knows, when it's
en/volunteer.wml 535) done maybe you can help write a paper or three also.</li>
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en/volunteer.wml 536) <li>Tor 0.1.1.x and later include support for hardware crypto accelerators
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en/volunteer.wml 537) via OpenSSL. Nobody has ever tested it, though. Does somebody want to get
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volunteer.html 538) a card and let us know how it goes?</li>
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volunteer.html 539) <li>Perform a security analysis of Tor with <a
volunteer.html 540) href="http://en.wikipedia.org/wiki/Fuzz_testing">"fuzz"</a>. Determine
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fix wordo
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en/volunteer.wml 541) if there are good fuzzing libraries out there for what we want. Win fame by
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volunteer.html 542) getting credit when we put out a new release because of you!</li>
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and i would like a pony.
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volunteer.html 543) <li>Tor uses TCP for transport and TLS for link
volunteer.html 544) encryption. This is nice and simple, but it means all cells
volunteer.html 545) on a link are delayed when a single packet gets dropped, and
volunteer.html 546) it means we can only reasonably support TCP streams. We have a <a
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en/volunteer.wml 547) href="https://wiki.torproject.org/noreply/TheOnionRouter/TorFAQ#TransportIPnotTCP">list
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en/volunteer.wml 548) of reasons why we haven't shifted to UDP transport</a>, but it would
en/volunteer.wml 549) be great to see that list get shorter. We also have a proposed <a
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en/volunteer.wml 550) href="<svnsandbox>doc/spec/proposals/100-tor-spec-udp.txt">specification
en/volunteer.wml 551) for Tor and
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en/volunteer.wml 552) UDP</a> — please let us know what's wrong with it.</li>
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volunteer.html 553) <li>We're not that far from having IPv6 support for destination addresses
volunteer.html 554) (at exit nodes). If you care strongly about IPv6, that's probably the
volunteer.html 555) first place to start.</li>
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volunteer.html 556) </ol>
volunteer.html 557)
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en/volunteer.wml 558) <a id="Research"></a>
en/volunteer.wml 559) <h2><a class="anchor" href="#Research">Research</a></h2>
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volunteer.html 560) <ol>
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volunteer.html 561) <li>The "website fingerprinting attack": make a list of a few
volunteer.html 562) hundred popular websites, download their pages, and make a set of
volunteer.html 563) "signatures" for each site. Then observe a Tor client's traffic. As
volunteer.html 564) you watch him receive data, you quickly approach a guess about which
volunteer.html 565) (if any) of those sites he is visiting. First, how effective is
volunteer.html 566) this attack on the deployed Tor codebase? Then start exploring
volunteer.html 567) defenses: for example, we could change Tor's cell size from 512
volunteer.html 568) bytes to 1024 bytes, we could employ padding techniques like <a
volunteer.html 569) href="http://freehaven.net/anonbib/#timing-fc2004">defensive dropping</a>,
volunteer.html 570) or we could add traffic delays. How much of an impact do these have,
volunteer.html 571) and how much usability impact (using some suitable metric) is there from
volunteer.html 572) a successful defense in each case?</li>
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volunteer.html 573) <li>The "end-to-end traffic confirmation attack":
volunteer.html 574) by watching traffic at Alice and at Bob, we can <a
volunteer.html 575) href="http://freehaven.net/anonbib/#danezis:pet2004">compare
volunteer.html 576) traffic signatures and become convinced that we're watching the same
volunteer.html 577) stream</a>. So far Tor accepts this as a fact of life and assumes this
volunteer.html 578) attack is trivial in all cases. First of all, is that actually true? How
volunteer.html 579) much traffic of what sort of distribution is needed before the adversary
volunteer.html 580) is confident he has won? Are there scenarios (e.g. not transmitting much)
volunteer.html 581) that slow down the attack? Do some traffic padding or traffic shaping
volunteer.html 582) schemes work better than others?</li>
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volunteer.html 583) <li>The "routing zones attack": most of the literature thinks of
volunteer.html 584) the network path between Alice and her entry node (and between the
volunteer.html 585) exit node and Bob) as a single link on some graph. In practice,
volunteer.html 586) though, the path traverses many autonomous systems (ASes), and <a
volunteer.html 587) href="http://freehaven.net/anonbib/#feamster:wpes2004">it's not uncommon
volunteer.html 588) that the same AS appears on both the entry path and the exit path</a>.
volunteer.html 589) Unfortunately, to accurately predict whether a given Alice, entry,
volunteer.html 590) exit, Bob quad will be dangerous, we need to download an entire Internet
volunteer.html 591) routing zone and perform expensive operations on it. Are there practical
volunteer.html 592) approximations, such as avoiding IP addresses in the same /8 network?</li>
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en/volunteer.wml 593) <li>Other research questions regarding geographic diversity consider
en/volunteer.wml 594) the tradeoff between choosing an efficient circuit and choosing a random
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en/volunteer.wml 595) circuit. Look at Stephen Rollyson's <a
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en/volunteer.wml 596) href="http://swiki.cc.gatech.edu:8080/ugResearch/uploads/7/ImprovingTor.pdf">position
en/volunteer.wml 597) paper</a> on how to discard particularly slow choices without hurting
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en/volunteer.wml 598) anonymity "too much". This line of reasoning needs more work and more
en/volunteer.wml 599) thinking, but it looks very promising.</li>
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en/volunteer.wml 600) <li>Tor doesn't work very well when relays have asymmetric bandwidth
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volunteer.html 601) (e.g. cable or DSL). Because Tor has separate TCP connections between
volunteer.html 602) each hop, if the incoming bytes are arriving just fine and the outgoing
volunteer.html 603) bytes are all getting dropped on the floor, the TCP push-back mechanisms
volunteer.html 604) don't really transmit this information back to the incoming streams.
volunteer.html 605) Perhaps Tor should detect when it's dropping a lot of outgoing packets,
volunteer.html 606) and rate-limit incoming streams to regulate this itself? I can imagine
volunteer.html 607) a build-up and drop-off scheme where we pick a conservative rate-limit,
volunteer.html 608) slowly increase it until we get lost packets, back off, repeat. We
volunteer.html 609) need somebody who's good with networks to simulate this and help design
volunteer.html 610) solutions; and/or we need to understand the extent of the performance
volunteer.html 611) degradation, and use this as motivation to reconsider UDP transport.</li>
volunteer.html 612) <li>A related topic is congestion control. Is our
volunteer.html 613) current design sufficient once we have heavy use? Maybe
volunteer.html 614) we should experiment with variable-sized windows rather
volunteer.html 615) than fixed-size windows? That seemed to go well in an <a
volunteer.html 616) href="http://www.psc.edu/networking/projects/hpn-ssh/theory.php">ssh
volunteer.html 617) throughput experiment</a>. We'll need to measure and tweak, and maybe
volunteer.html 618) overhaul if the results are good.</li>
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volunteer.html 619) <li>To let dissidents in remote countries use Tor without being blocked
volunteer.html 620) at their country's firewall, we need a way to get tens of thousands of
volunteer.html 621) relays, not just a few hundred. We can imagine a Tor client GUI that
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en/volunteer.wml 622) has a "Tor for Freedom" button at the top that opens a port and relays a
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volunteer.html 623) few KB/s of traffic into the Tor network. (A few KB/s shouldn't be too
volunteer.html 624) much hassle, and there are few abuse issues since they're not being exit
volunteer.html 625) nodes.) But how do we distribute a list of these volunteer clients to the
volunteer.html 626) good dissidents in an automated way that doesn't let the country-level
volunteer.html 627) firewalls intercept and enumerate them? Probably needs to work on a
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en/volunteer.wml 628) human-trust level. See our <a href="<page documentation>#DesignDoc">early
en/volunteer.wml 629) blocking-resistance design document</a> and our
en/volunteer.wml 630) <a
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en/volunteer.wml 631) href="https://wiki.torproject.org/noreply/TheOnionRouter/TorFAQ#BlockingResistance">FAQ
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en/volunteer.wml 632) entry</a> on this, and then read the <a
en/volunteer.wml 633) href="http://freehaven.net/anonbib/topic.html#Communications_20Censorship">censorship
en/volunteer.wml 634) resistance section of anonbib</a>.</li>
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volunteer.html 635) <li>Tor circuits are built one hop at a time, so in theory we have the
volunteer.html 636) ability to make some streams exit from the second hop, some from the
volunteer.html 637) third, and so on. This seems nice because it breaks up the set of exiting
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en/volunteer.wml 638) streams that a given relay can see. But if we want each stream to be safe,
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volunteer.html 639) the "shortest" path should be at least 3 hops long by our current logic, so
volunteer.html 640) the rest will be even longer. We need to examine this performance / security
volunteer.html 641) tradeoff.</li>
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en/volunteer.wml 642) <li>It's not that hard to DoS Tor relays or directory authorities. Are client
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volunteer.html 643) puzzles the right answer? What other practical approaches are there? Bonus
volunteer.html 644) if they're backward-compatible with the current Tor protocol.</li>
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volunteer.html 645) </ol>
volunteer.html 646)
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en/volunteer.wml 647) <a href="<page contact>">Let us know</a> if you've made progress on any
en/volunteer.wml 648) of these!
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volunteer.html 649)
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en/volunteer.wml 650) </div><!-- #main -->
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volunteer.html 651)
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en/volunteer.wml 652) #include <foot.wmi>
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