tor-webwml.git

1) ## translation metadata

2) # Revision: $Revision$

3) # Translation-Priority: 4-optional
4) 
5) #include "head.wmi" TITLE="Tor: Volunteer" CHARSET="UTF-8"
6) <div id="content" class="clearfix">
7)   <div id="breadcrumbs">

8)     <a href="<page index>">Home &raquo; </a>

9)     <a href="<page getinvolved/volunteer>">Volunteer</a>
10)   </div>

11)   <div id="maincol">

12)     <!-- PUT CONTENT AFTER THIS TAG -->
13)     <h1>A few things everyone can do now:</h1>
14)     <ol>
15)     <li>Please consider <a href="<page docs/tor-doc-relay>">running
16)     a relay</a> to help the Tor network grow.</li>
17)     <li>Tell your friends! Get them to run relays. Get them to run hidden
18)     services. Get them to tell their friends.</li>
19)     <li>If you like Tor's goals, please <a href="<page donate/donate>">take a moment
20)     to donate to support further Tor development</a>. We're also looking
21)     for more sponsors &mdash; if you know any companies, NGOs, agencies,
22)     or other organizations that want anonymity / privacy / communications
23)     security, let them know about us.</li>
24)     <li>We're looking for more <a href="<page about/torusers>">good examples of Tor
25)     users and Tor use cases</a>. If you use Tor for a scenario or purpose not
26)     yet described on that page, and you're comfortable sharing it with us,
27)     we'd love to hear from you.</li>
28)     </ol>

29) 

30)     <a id="Documentation"></a>
31)     <h2><a class="anchor" href="#Documentation">Documentation</a></h2>
32)     <ol>

33)     <li>Help translate the
34) <!-- web page and -->
35)     documentation into other

36)     languages. See the <a href="<page getinvolved/translation>">translation
37)     guidelines</a> if you want to help out. We especially need Arabic or
38)     Farsi translations, for the many Tor users in censored areas.</li>
39)     <li>Evaluate and document

40)     <a href="<wiki>doc/TorifyHOWTO">our

41)     list of programs</a> that can be configured to use Tor.</li>
42)     <li>We have a huge list of <a

43)     href="<wiki>doc/SupportPrograms">potentially useful

44)     programs that interface with Tor</a>. Which ones are useful in which

45)     situations? Please help us test them out and document your results.</li>
46)     </ol>

47) 

48)     <a id="Advocacy"></a>
49)     <h2><a class="anchor" href="#Advocacy">Advocacy</a></h2>
50)     <ol>

51)     <li>Monitor some of our <a 
52)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo">public mailing 
53)     lists</a>, like <a 
54)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk">tor-talk</a>, <a 
55)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays">tor-relays</a>, <a 
56)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev">tor-dev</a>, or <a 
57)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo/tbb-dev">tbb-dev</a>, 
58)     and summarize noteworthy exchanges into articles for <a 

59)     href="https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-news">Tor 

60)     Weekly News</a>.</li>

61)     <li>Create a presentation that can be used for various user group
62) meetings around the world.</li>

63)     <li>Create a video about the positive uses of Tor, what Tor is,
64)     or how to use it.  Some have already started on <a

65)     href="https://media.torproject.org/video/">Tor's Media server</a>,

66)     <a

67)     href="http://www.howcast.com/videos/90601-How-To-Circumvent-an-Internet-Proxy">Howcast</a>,

68)     and <a href="http://www.youtube.com/thetorproject">YouTube</a>.</li>

69)     <li>Create a poster around a theme, such as "Tor for Freedom!"</li>

70)     <li>Create a t-shirt design that incorporates "<a
71)     href="https://check.torproject.org/">Congratulations! You are using
72)     Tor!</a>" in any language.</li>

73)     <li>Spread the word about Tor at a symposium or conference and use these
74)     <a href="https://media.torproject.org/misc/2015-03-tor-brochure/">Tor
75)     brochures</a> in PDF and ODG format and translated to at least ten
76)     different languages as conversation starter.</li>

77)     </ol>

78) 

79) <!--

80)     <a id="gsoc"></a>
81)     <h2><a class="anchor" href="#gsoc">Google Summer of Code</a></h2>
82) 
83)     <p>
84)     Tor is also taking part in this year's <a
85)     href="https://www.google-melange.com/gsoc/homepage/google/gsoc2013">Google
86)     Summer of Code</a>! The criteria for this is a little different - either
87)     gender can apply but you need to be either <a
88)     href="https://www.google-melange.com/gsoc/document/show/gsoc_program/google/gsoc2013/help_page#2._Whos_eligible_to_participate_as_a">a
89)     present student or just graduated</a>.
90)     </p>
91) 
92)     <p>
93)     As mentioned above if you're eligible for either program then please apply
94)     for both! Google Summer of Code is a far, far larger program for us than
95)     OPW so your chances of being applied that way are considerably better.
96)     </p>
97) 
98)     <p>
99)     <b>See our page for <a href="<page about/gsoc>">Google Summer of Code</a>
100)     for more information.</b>
101)     </p>

102) -->

103) 

104)     <a id="Projects"></a>
105)     <h2><a class="anchor" href="#Projects">Projects</a></h2>

106) 

107)     <p>
108)     Below are a list of Tor related projects we're developing and/or
109)     maintaining. Most discussions happen on IRC so if you're interested in any
110)     of these (or you have a project idea of your own), then please <a

111)     href="<page about/contact>#irc">join us in #tor-dev</a>. Don't be shy
112)     to ask questions, and don't hesitate to ask even if the main contributors
113)     aren't active at that moment.

114)     </p>

115) 

116)     <p>
117)     For a presentation summarizing many of these projects see...
118)     </p>
119) 
120)     <div id="ecosystem_presentation">

121)       <a href="https://www.youtube.com/watch?v=fb6iqZcQsSg">Tor Ecosystem</a> (<a href="https://media.torproject.org/video/2013-11-t3am-damian-johnson.mp4">mp4</a>, <a href="https://svn.torproject.org/svn/projects/presentations/2013-11-t3am-tor-ecosystem.pdf">slides</a>)

122)     </div>
123) 
124)     <br /></br />
125) 

126)     <table id="projects">
127)       <tr>
128)         <th>Name</th>
129)         <th>Category</th>
130)         <th>Language</th>
131)         <th>Activity</th>
132)         <th>Contributors</th>
133)       </tr>

134) 

135)       <tr>
136)         <td><a href="#project-tor">Tor</a></td>
137)         <td>Core</td>
138)         <td>C</td>
139)         <td>Heavy</td>

140)         <td>nickm, athena, arma</td>

141)       </tr>

142) 

143)       <tr>

144)         <td><a href="#project-torbrowser">Tor Browser</a></td>

145)         <td>Bundle</td>

146)         <td>Javascript, XUL, Scripting</td>

147)         <td>Heavy</td>

148)         <td>mikeperry, Pearl Crescent</td>

149)       </tr>
150) 

151)       <tr>

152)         <td><a href="#project-httpseverywhere">HTTPS Everywhere</a></td>
153)         <td>Browser Add-on</td>
154)         <td>Javascript</td>

155)         <td>Heavy</td>

156)         <td>pde, mikeperry</td>

157)       </tr>

158) 

159)       <tr>

160)         <td><a href="#project-nyx">Nyx</a></td>

161)         <td>User Interface</td>
162)         <td>Python, Curses</td>

163)         <td>Heavy</td>

164)         <td>atagar</td>
165)       </tr>

166) 

167)       <tr>

168)         <td><a href="#project-orbot">Orbot</a></td>
169)         <td>User Interface</td>
170)         <td>Java</td>

171)         <td>Moderage</td>

172)         <td>n8fr8</td>

173)       </tr>

174) 

175)       <tr>

176)         <td><a href="#project-tails">Tails</a></td>
177)         <td>OS image</td>
178)         <td>Sys Admin</td>
179)         <td>Heavy</td>
180)         <td><a href="https://tails.boum.org/">#tails</a></td>

181)       </tr>

182) 

183)       <tr>

184)         <td><a href="#project-torramdisk">tor-ramdisk</a></td>
185)         <td>OS image</td>
186)         <td>Sys Admin</td>

187)         <td>Light</td>

188)         <td>blueness</td>
189)       </tr>
190) 

191)       <tr>

192)         <td><a href="#project-torsocks">Torsocks</a></td>
193)         <td>Usability</td>
194)         <td>C</td>

195)         <td>Light</td>

196)         <td>David Goulet</td>

197)       </tr>
198) 

199)       <tr>
200)         <td><a href="#project-tormessenger">Tor Messenger</a></td>
201)         <td>Bundle</td>
202)         <td>JavaScript, XUL, Scripting</td>
203)         <td>Heavy</td>
204)         <td>arlolra, boklm, sukhe</td>
205)       </tr>
206) 

207)       <tr>

208)         <td><a href="#project-torbirdy">TorBirdy</a></td>
209)         <td>Browser Add-on</td>
210)         <td>JavaScript</td>

211)         <td>Light</td>
212)         <td>sukhe</td>

213)       </tr>

214) 

215)       <tr>

216)         <td><a href="#project-obfsproxy">Obfsproxy</a></td>
217)         <td>Client Add-on</td>

218)         <td>Python</td>

219)         <td>None</td>

220)         <td>asn</td>

221)       </tr>
222) 

223)       <tr>

224)         <td><a href="#project-flash-proxy">Flash Proxy</a></td>
225)         <td>Client Add-on</td>
226)         <td>Python, JavaScript, Go</td>

227)         <td>Light</td>

228)         <td>dcf, infinity0, Arlo Breault</td>

229)       </tr>

230) 

231)       <tr>

232)         <td><a href="#project-shadow">Shadow</a></td>

233)         <td>Simulator</td>

234)         <td>C, Python</td>

235)         <td>Heavy</td>

236)         <td>robgjansen</td>
237)       </tr>

238) 

239)       <tr>
240)         <td><a href="#project-chutney">Chutney</a></td>
241)         <td>Simulator</td>
242)         <td>Python</td>
243)         <td>Light</td>
244)         <td>nickm</td>
245)       </tr>
246) 

247)       <tr>

248)         <td><a href="#project-stem">Stem</a></td>

249)         <td>Library</td>
250)         <td>Python</td>

251)         <td>Heavy</td>

252)         <td>atagar</td>

253)       </tr>

254) 

255)       <tr>

256)         <td><a href="#project-txtorcon">Txtorcon</a></td>
257)         <td>Library</td>
258)         <td>Python, Twisted</td>

259)         <td>Light</td>

260)         <td>meejah</td>
261)       </tr>

262) 

263)       <tr>

264)         <td><a href="#project-tlsdate">Tlsdate</a></td>
265)         <td>Utility</td>
266)         <td>C</td>

267)         <td>None</td>

268)         <td>ioerror</td>
269)       </tr>

270) 

271)       <tr>

272)         <td><a href="#project-metrics">Metrics</a></td>
273)         <td>Client Service</td>
274)         <td>Java</td>

275)         <td>Moderate</td>

276)         <td>karsten</td>
277)       </tr>

278) 

279)       <tr>

280)         <td><a href="#project-atlas">Atlas</a></td>
281)         <td>Client Service</td>
282)         <td>JavaScript</td>

283)         <td>None</td>

284)         <td></td>

285)       </tr>

286) 

287)       <tr>
288)         <td><a href="#project-globe">Globe</a></td>
289)         <td>Client Service</td>
290)         <td>JavaScript</td>

291)         <td>None</td>
292)         <td></td>

293)       </tr>
294) 

295)       <tr>

296)         <td><a href="#project-compass">Compass</a></td>
297)         <td>Client Service</td>
298)         <td>Python</td>

299)         <td>None</td>
300)         <td></td>

301)       </tr>

302) 

303)       <tr>

304)         <td><a href="#project-onionoo">Onionoo</a></td>
305)         <td>Backend Service</td>

306)         <td>Java</td>

307)         <td>Light</td>

308)         <td>karsten</td>

309)       </tr>
310) 

311)       <tr>
312)         <td><a href="#project-exitmap">ExitMap</a></td>
313)         <td>Backend Service</td>
314)         <td>Python</td>

315)         <td>Light</td>

316)         <td>phw</td>
317)       </tr>
318) 

319)       <tr>
320)         <td><a href="#project-doctor">DocTor</a></td>
321)         <td>Backend Service</td>
322)         <td>Python</td>

323)         <td>Light</td>

324)         <td>atagar</td>
325)       </tr>
326) 

327)       <tr>

328)         <td><a href="#project-weather">Weather</a></td>
329)         <td>Client Service</td>
330)         <td>Python</td>

331)         <td>None</td>

332)         <td>kaner</td>
333)       </tr>

334) 

335)       <tr>

336)         <td><a href="#project-gettor">GetTor</a></td>
337)         <td>Client Service</td>
338)         <td>Python</td>

339)         <td>Light</td>
340)         <td>ilv</td>

341)       </tr>

342) 

343)       <tr>

344)         <td><a href="#project-torcheck">TorCheck</a></td>
345)         <td>Client Service</td>

346)         <td>Go</td>

347)         <td>None</td>

348)         <td>Arlo</td>

349)       </tr>

350) 

351)       <tr>

352)         <td><a href="#project-bridgedb">BridgeDB</a></td>
353)         <td>Backend Service</td>
354)         <td>Python</td>

355)         <td>Light</td>

356)         <td>isis</td>

357)       </tr>

358) 

359)       <tr>

360)         <td><a href="#project-ooni-probe">Ooni Probe</a></td>

361)         <td>Scanner</td>
362)         <td>Python</td>

363)         <td>Moderate</td>

364)         <td>hellais, aagbsn</td>

365)       </tr>
366) 

367)       <tr>
368)         <td><a href="#project-torps">TorPS</a></td>
369)         <td>Backend Service</td>
370)         <td>Python</td>

371)         <td>None</td>

372)         <td>Aaron Johnson</td>
373)       </tr>
374) 

375)       <tr>

376)         <td><a href="#project-torflow">TorFlow</a></td>
377)         <td>Backend Service</td>
378)         <td>Python</td>

379)         <td>None</td>

380)         <td>aagbsn</td>

381)       </tr>

382) 

383)       <tr>

384)         <td><a href="#project-tor2web">Tor2web</a></td>
385)         <td>Client Service</td>

386)         <td>Python</td>

387)         <td>Heavy</td>

388)         <td>evilaliv3, hellais</td>

389)       </tr>

390) 

391)       <tr>

392)         <td><a href="#project-anonbib">Anonbib</a></td>
393)         <td>Website</td>

394)         <td>Python</td>

395)         <td>Light</td>

396)         <td>arma, nickm</td>
397)       </tr>

398)     </table>

399) 

400)     <sub>
401)     * Project is still in an alpha state.
402)     </sub>

403) 

404)     <br /><br />

405) 

406)     <a id="project-tor"></a>
407)     <h3>Tor (<a href="https://gitweb.torproject.org/tor.git">code</a>, <a

408)     href="https://trac.torproject.org/projects/tor/report/12">bug

409)     tracker</a>)</h3>

410) 

411)     <p>
412)     Central project, providing the core software for using and participating in
413)     the Tor network. Numerous people contribute to the project to varying
414)     extents, but the chief architects are Nick Mathewson and Roger Dingledine.
415)     </p>

416) 

417)     <p>
418)     <b>Project Ideas:</b><br />

419)     <i><a href="#improveHiddenServices">Help improve Tor hidden services</a></i>

420)     </p>

421) 

422)     <a id="project-torbrowser"></a>

423)     <h3><a href="<page projects/torbrowser>">Tor Browser</a> (<a

424)     href="https://gitweb.torproject.org/tor-browser.git">code</a>, <a

425)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Torbutton&component=Tor+Launcher&component=Tor+Browser&component=Tor+bundles%2Finstallation&col=id&col=summary&col=status&col=owner&col=type&col=priority&col=milestone&order=priority">bug

426)     tracker</a>, <a href="https://www.torproject.org/projects/torbrowser/design/">design doc</a>)</h3>
427) 

428)     <p>

429)     Tor Browser is an easy-to-use, portable package of Tor, HTTPS-Everywhere, 
430)     NoScript, TorLauncher, Torbutton, and a Firefox fork, all  preconfigured 
431)     to work together out of
432)     the box. The modified copy of Firefox aims to resolve the

433)     privacy and security issues in mainline version.

434)     </p>

435) 

436)     <p>
437)     <b>Project Ideas:</b><br />
438)     <i><a href="#panopticlick">Panopticlick</a></i><br />
439)     </p>
440) 

441)     <a id="project-httpseverywhere"></a>
442)     <h3><a href="https://www.eff.org/https-everywhere">HTTPS Everywhere</a> (<a
443)     href="https://gitweb.torproject.org/https-everywhere.git">code</a>, <a
444)     href="https://trac.torproject.org/projects/tor/report/19">bug

445)     tracker</a>)</h3>

446) 

447)     <p>

448)     HTTPS Everywhere is a Firefox and Chrome extension that encrypts
449)     your communications with many major websites, making your browsing
450)     more secure.

451)     </p>

452) 

453)     <a id="project-nyx"></a>
454)     <h3><a href="https://www.atagar.com/arm/">Nyx</a> (<a
455)     href="https://gitweb.torproject.org/nyx.git">code</a>, <a

456)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=arm&order=priority">bug
457)     tracker</a>)</h3>

458) 

459)     <p>

460)     Nyx (previously <i>arm</i>) is a terminal status monitor for Tor

461)     intended for command-line aficionados, ssh connections, and anyone with a
462)     tty terminal. This works much like top does for system usage, providing
463)     real time statistics for bandwidth, resource usage, connections, and quite
464)     a bit more.

465)     </p>

466) 

467)     <p>
468)     <b>Project Ideas:</b><br />
469)     <i><a href="#expand_nyx">Expand Nyx</a></i>
470)     </p>
471) 

472)     <a id="project-orbot"></a>
473)     <h3><a href="https://guardianproject.info/apps/orbot/">Orbot</a> (<a

474)     href="https://gitweb.torproject.org/orbot.git">code</a>, <a

475)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Orbot&order=priority">bug
476)     tracker</a>)</h3>

477) 
478)     <p>

479)     Provides Tor on the Android platform. The project is under active 
480)     development, updates to latest Tor releases, and working to stay up to 
481)     date with all changes in Android and mobile threats.

482)     </p>
483) 
484)     <a id="project-tails"></a>
485)     <h3><a href="https://tails.boum.org/">The Amnesic Incognito Live System</a> (<a

486)     href="https://git-tails.immerda.ch/tails/">code</a>, <a
487)     href="https://labs.riseup.net/code/projects/tails">bug

488)     tracker</a>, <a href="https://tails.boum.org/doc">documentation</a>, <a
489)     href="https://tails.boum.org/contribute/design/">design</a>, <a
490)     href="https://tails.boum.org/contribute">contribute</a>)</h3>

491) 
492)     <p>
493)     The Amnesic Incognito Live System is a live CD/USB distribution
494)     preconfigured so that everything is safely routed through Tor and leaves no
495)     trace on the local system. This is a merger of the Amnesia and <a
496)     href="http://www.anonymityanywhere.com/incognito/">Incognito</a> projects,
497)     and still under very active development.
498)     </p>
499) 

500)     <a id="project-torramdisk"></a>
501)     <h3><a href="http://opensource.dyc.edu/tor-ramdisk">Tor-ramdisk</a> (<a

502)     href="https://gitweb.torproject.org/tor-ramdisk.git">code</a>, <a

503)     href="http://opensource.dyc.edu/tor-ramdisk-documentation">documentation</a>)</h3>

504) 
505)     <p>

506)     Tor-ramdisk is a uClibc-based micro Linux distribution whose sole
507)     purpose is to securely host a Tor server purely in RAM.

508)     </p>
509) 

510)     <a id="project-torsocks"></a>

511)     <h3>Torsocks (<a

512)     href="https://gitweb.torproject.org/torsocks.git">code</a>, <a
513)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Torify&order=priority">bug
514)     tracker</a>)</h3>
515) 

516)     <p>

517)     Utility for adapting other applications to work with Tor. Development has
518)     slowed and compatibility issues remain with some platforms, but it's
519)     otherwise feature complete.

520)     </p>

521) 

522)     <a id="project-tormessenger"></a>
523)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/doc/TorMessenger">Tor Messenger</a> (<a
524)     href="https://gitweb.torproject.org/tor-messenger-build.git">code</a>, <a
525)     href="https://trac.torproject.org/projects/tor/query?status=!closed&component=Tor+Messenger">bug tracker</a>)</h3>
526) 
527)     <p>
528)     Tor Messenger is a cross-platform chat program that aims to be secure by default and sends all of its traffic over Tor.
529)     </p>
530) 

531)     <a id="project-torbirdy"></a>
532)     <h3>TorBirdy (<a

533)     href="https://gitweb.torproject.org/torbirdy.git">code</a>, <a

534)     href="https://trac.torproject.org/projects/tor/wiki/torbirdy/dev">bug
535)     tracker</a>)</h3>

536) 

537)     <p>
538)     TorBirdy is Torbutton for Thunderbird and related Mozilla mail clients.
539)     </p>

540) 

541)     <p>
542)     <b>Project Ideas:</b><br />
543)     <i><a href="#makeTorbirdyBetter">Make TorBirdy Better</a></i>
544)     </p>
545) 

546)     <a id="project-obfsproxy"></a>

547)     <h3><a href="<page projects/obfsproxy>">Obfsproxy</a> (<a

548)     href="https://gitweb.torproject.org/pluggable-transports/obfsproxy.git">code</a>,
549)     <a href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Pluggable+transport&order=priority">bug

550)     tracker</a>)</h3>

551) 

552)     <p>
553)     A proxy that shapes Tor traffic, making it harder for censors to detect and

554)     block Tor. This has both a C and python implementation.

555)     </p>

556) 

557)     <a id="project-flash-proxy"></a>
558)     <h3><a href="https://crypto.stanford.edu/flashproxy/">Flash Proxy</a> (<a
559)     href="https://gitweb.torproject.org/flashproxy.git">code</a>, <a
560)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_information&status=needs_review&status=needs_revision&status=new&status=reopened&component=Flashproxy">bug
561)     tracker</a>)</h3>

562) 

563)     <p>
564)     Pluggable transport using proxies running in web browsers to defeat
565)     address-based blocking.
566)     </p>

567) 

568)     <a id="project-chutney"></a>
569)     <h3>Chutney (<a href="https://gitweb.torproject.org/chutney.git">code</a>,
570)     <a href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_information&status=needs_review&status=needs_revision&status=new&status=reopened&component=Chutney">bug
571)     tracker</a>)</h3>
572) 
573)     <p>
574)     Integration test suite that spawns a local tor network, checking the
575)     interactions of its components.
576)     </p>
577) 

578)     <a id="project-shadow"></a>
579)     <h3><a href="https://shadow.cs.umn.edu/">Shadow</a> (<a
580)     href="https://github.com/shadow">code</a>, <a
581)     href="https://github.com/shadow/shadow/issues">bug
582)     tracker</a>)</h3>

583) 

584)     <p>
585)     Shadow is a discrete-event network simulator that runs the real
586)     Tor software as a plug-in. Shadow is open-source software that enables
587)     accurate, efficient, controlled, and repeatable Tor experimentation.

588)     For another simulator, see <a
589)     href="http://crysp.uwaterloo.ca/software/exptor/">ExperimenTor</a>.

590)     </p>

591) 

592)     <a id="project-stem"></a>

593)     <h3><a href="https://stem.torproject.org/">Stem</a> (<a

594)     href="https://gitweb.torproject.org/stem.git">code</a>, <a

595)     href="https://trac.torproject.org/projects/tor/wiki/doc/stem/bugs">bug

596)     tracker</a>)</h3>

597) 

598)     <p>

599)     Python controller library for scripts and controller applications using
600)     Tor.

601)     </p>

602) 

603)     <p>
604)     <b>Project Ideas:</b><br />
605)     <i><a href="#descriptor_parsing_in_go">Stem Descriptor Parsing in Go</a></i>
606)     </p>
607) 

608)     <a id="project-txtorcon"></a>

609)     <h3><a href="https://txtorcon.readthedocs.org">Txtorcon</a> (<a

610)     href="https://github.com/meejah/txtorcon">code</a>, <a

611)     href="https://github.com/meejah/txtorcon/issues">bug tracker</a>)</h3>

612) 

613)     <p>
614)     Twisted-based asynchronous Tor control protocol implementation. Includes
615)     unit-tests, examples, state-tracking code and configuration abstraction.
616)     Used by OONI and APAF.
617)     </p>

618) 

619)     <p>
620)     <b>Project Ideas:</b><br />
621)     <i><a href="#txtorcon_use_txaio">Convert txtorcon to use txaio</a></i><br />
622)     <i><a href="#txtorcon_use_pytest">Convert txtorcon to py.test</a></i>
623)     </p>
624) 

625)     <a id="project-tlsdate"></a>
626)     <h3>Tlsdate (<a href="https://github.com/ioerror/tlsdate">code</a>)</h3>

627) 

628)     <p>
629)     tlsdate: secure parasitic rdate replacement
630)     </p>

631) 

632)     <p>
633)     tlsdate sets the local clock by securely connecting with TLS to remote
634)     servers and extracting the remote time out of the secure handshake. Unlike
635)     ntpdate, tlsdate uses TCP, for instance connecting to a remote HTTPS or TLS
636)     enabled service, and provides some protection against adversaries that try
637)     to feed you malicious time information.
638)     </p>

639) 

640)     <a id="project-metrics"></a>
641)     <h3><a href="https://metrics.torproject.org/">Metrics</a> (code: <a
642)     href="https://gitweb.torproject.org/metrics-db.git">db</a>, <a

643)     href="https://gitweb.torproject.org/metrics-web.git">web</a>)</h3>

644) 

645)     <p>
646)     Processing and analytics of consensus data, provided to users via the
647)     metrics portal. This has been under active development for several years by

648)     Karsten Loesing. See also <a
649)     href="https://gitweb.torproject.org/torperf.git">TorPerf</a>.

650)     </p>

651) 

652)     <a id="project-atlas"></a>
653)     <h3><a href="https://atlas.torproject.org/">Atlas</a> (<a
654)     href="https://gitweb.torproject.org/atlas.git">code</a>)</h3>

655) 

656)     <p>
657)     Atlas is a web application to discover Tor relays and bridges. It provides
658)     useful information on how relays are configured along with graphics about

659)     their past usage.

660)     </p>

661) 

662)     <p>

663)     This is the spiritual successor to <a
664)     href="https://gitweb.torproject.org/torstatus.git">TorStatus</a>, the <a

665)     href="https://svn.torproject.org/svn/torstatus/trunk/">original

666)     codebase</a> for which was written in PHP, and rewritten by students from
667)     Wesleyan as Django.

668)     </p>

669) 

670)     <a id="project-globe"></a>
671)     <h3><a href="http://globe.rndm.de/">Globe</a> (<a
672)     href="https://github.com/makepanic/globe">code</a>, <a
673)     href="https://github.com/makepanic/globe/issues">bug tracker</a>)</h3>
674) 
675)     <p>
676)     Globe is a web application that allows you to search for Tor relays and
677)     bridges. It gives you a detailed overview of properties and configurations
678)     of a relay or bridge.
679)     </p>
680) 

681)     <a id="project-compass"></a>
682)     <h3><a href="https://compass.torproject.org/">Compass</a> (<a
683)     href="https://gitweb.torproject.org/compass.git">code</a>, <a
684)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Compass&order=priority">bug
685)     tracker</a>)</h3>

686) 

687)     <p>
688)     Compass is a web and command line application that filters and
689)     aggregates the Tor relays based on various attributes.
690)     </p>

691) 
692)     <a id="project-onionoo"></a>

693)     <h3><a href="https://onionoo.torproject.org/">Onionoo</a> (<a
694)     href="https://gitweb.torproject.org/onionoo.git">code</a>,
695)     <a href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Onionoo&order=priority">bug tracker</a>)</h3>

696) 
697)     <p>
698)     Onionoo is a JSON based protocol to learn information about currently
699)     running Tor relays and bridges.
700)     </p>
701) 

702)     <a id="project-exitmap"></a>
703)     <h3><a href="http://www.cs.kau.se/philwint/spoiled_onions/">ExitMap</a> (<a
704)     href="https://github.com/NullHypothesis/exitmap">code</a>, <a
705)     href="https://github.com/NullHypothesis/exitmap/issues">bug tracker</a>)</h3>
706) 
707)     <p>

708)     Scanner for the Tor network by Philipp Winter to detect malicious and
709)     misconfigured exits. For more information about how it works see his <a
710)     href="http://www.cs.kau.se/philwint/spoiled_onions/pets2014.pdf">Spoiled

711)     Onions</a> research paper.
712)     </p>
713) 

714)     <p>
715)     <b>Project Ideas:</b><br />
716)     <i><a href="#exitmap_improvements">Exitmap Improvements</a></i>
717)     </p>
718) 

719)     <a id="project-doctor"></a>
720)     <h3>DocTor (<a
721)     href="https://gitweb.torproject.org/doctor.git">code</a>, <a
722)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=DocTor&order=priority">bug
723)     tracker</a>)</h3>
724) 
725)     <p>
726)     DocTor is a notification service that monitors newly published descriptor
727)     information for issues. This is primarily a service to help the tor
728)     directory authority operators, but it also checks for a handful of other
729)     issues like sybil attacks.
730)     </p>
731) 

732)     <a id="project-weather"></a>

733)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/org/roadmaps/Weather">Weather</a> (<a

734)     href="https://gitweb.torproject.org/weather.git">code</a>, <a
735)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Tor+Weather&order=priority">bug
736)     tracker</a>)</h3>

737) 

738)     <p>
739)     Provides automatic notification to subscribed relay operators when their
740)     relay's unreachable. This underwent a rewrite by the <a
741)     href="http://hfoss.wesleyan.edu/">Wesleyan HFOSS team</a>, which went live
742)     in early 2011.
743)     </p>

744) 

745)     <a id="project-gettor"></a>

746)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/org/roadmaps/GetTor">GetTor</a> (<a

747)     href="https://gitweb.torproject.org/gettor.git">code</a>, <a

748)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=GetTor&order=priority">bug
749)     tracker</a>)</h3>

750) 

751)     <p>
752)     E-mail autoresponder providing Tor's packages over SMTP. This has been
753)     relatively unchanged for quite a while.
754)     </p>

755) 

756)     <a id="project-torcheck"></a>

757)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/org/roadmaps/TorCheck">TorCheck</a> (<a

758)     href="https://gitweb.torproject.org/check.git">code</a>, <a

759)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Tor+Check&order=priority">bug
760)     tracker</a>)</h3>

761) 

762)     <p>

763)     Site for determining if the visitor is using Tor or not.

764)     </p>

765) 

766)     <a id="project-bridgedb"></a>

767)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/org/roadmaps/BridgeDB">BridgeDB</a> (<a

768)     href="https://gitweb.torproject.org/bridgedb.git">code</a>, <a
769)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=BridgeDB&order=priority">bug
770)     tracker</a>)</h3>

771) 

772)     <p>
773)     Backend bridge distributor, handling the various pools they're distributed
774)     in. This was actively developed until Fall of 2010.
775)     </p>

776) 
777)     <a id="project-ooni-probe"></a>

778)     <h3><a href="https://ooni.torproject.org/">Ooni Probe</a> (<a

779)     href="https://gitweb.torproject.org/ooni-probe.git">code</a>, <a
780)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Ooni&order=priority">bug
781)     tracker</a>)</h3>
782) 
783)     <p>
784)     Censorship scanner, checking your local connection for blocked or modified
785)     content.
786)     </p>
787) 

788)     <a id="project-torps"></a>
789)     <h3>TorPS</a> (<a href="https://github.com/torps/torps">code</a>)</h3>
790) 
791)     <p>
792)     The Tor Path Simulator (TorPS) is a tool for efficiently simulating
793)     path selection in Tor. It chooses circuits and assigns user streams to
794)     those circuits in the same way that Tor does. TorPS is fast enough to
795)     perform thousands of simulations over periods of months.
796)     </p>
797) 

798)     <a id="project-torflow"></a>

799)     <h3><a href="https://trac.torproject.org/projects/tor/wiki/org/roadmaps/TorFlow">TorFlow</a> (<a

800)     href="https://gitweb.torproject.org/torflow.git">code</a>, <a
801)     href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_review&status=new&status=reopened&component=Torflow&order=priority">bug
802)     tracker</a>)</h3>

803) 

804)     <p>
805)     Library and collection of services for actively monitoring the Tor network.
806)     These include the Bandwidth Scanners (measuring throughput of relays) and
807)     SoaT (scans for malicious or misconfigured exit nodes). SoaT was last
808)     actively developed in the Summer of 2010, and the Bandwidth Scanners a few
809)     months later. Both have been under active use since then, but development
810)     has stopped.
811)     </p>

812) 
813)     <a id="project-tor2web"></a>
814)     <h3><a
815)     href="http://wiki.tor2web.org/index.php/Main_Page">Tor2web</a> (<a
816)     href="https://github.com/globaleaks/tor2web-3.0/wiki">code</a>)</h3>
817) 
818)     <p>
819)     Tor2web allows Internet users to browse websites running in <a
820)     href="<page docs/hidden-services>">Tor hidden services</a>. It trades
821)     user anonymity for usability by allowing anonymous content to be
822)     distributed to non-anonymous users.
823)     </p>
824) 

825)     <a id="project-anonbib"></a>
826)     <h3><a
827)     href="http://freehaven.net/anonbib/">Anonymity Bibliography</a> (<a
828)     href="https://gitweb.torproject.org/anonbib.git">code</a>)</h3>
829) 
830)     <p>

831)     Anonbib is a list of important papers in the field of anonymity. It's
832)     also a set of scripts to generate the website from Latex (bibtex). If
833)     we're missing any important papers, please let us know!

834)     </p>
835) 

836)     <a id="Coding"></a>
837)     <a id="Summer"></a>

838)     <h2><a class="anchor" href="#Coding">Project Ideas</a></h2>

839) 

840)     <p>

841)     You may find some of these projects to be good ideas for <a href="<page
842)     about/gsoc>">Google Summer of Code</a> and the <a
843)     href="https://live.gnome.org/OutreachProgramForWomen">Outreach Program for

844)     Women</a>. We have labelled each idea with which of our <a href="<page
845)     about/corepeople>">core developers</a> would be good mentors. If one or
846)     more of these ideas looks promising to you, please <a href="<page
847)     about/contact>">contact us</a> to discuss your plans rather than sending
848)     blind applications. You may also want to propose your own project idea
849)     &mdash; which often results in the best applications.

850)     </p>

851) 

852)     <ol>

853) 

854)     <a id="makeTorbirdyBetter"></a>
855)     <li>
856)     <b>Make TorBirdy Better</b>
857)     <br>

858)     Language: <i>JavaScript, C++</i>

859)     <br>

860)     Likely Mentors: <i>Sukhbir Singh (sukhe)</i>

861)     <br><br>

862)     <p>
863) TorBirdy is an extension that configures Thunderbird to make connections over
864) the Tor anonymity network. TorBirdy has been under development for quite a
865) while but there are two known leaks that prevent it from being used by a wider

866) audience. As part of this project, you will be working on implementing a HTTP
867) proxy.

868)     </p>
869) 
870)     <p>

871) <b>HTTP Proxy</b> TorBirdy needs a HTTP proxy or a HTTP -&gt; SOCKS5 shim. Please look at

872) ticket <a href="https://trac.torproject.org/projects/tor/ticket/6958">#6958</a>

873) for more information. Note: this has to be done using JavaScript and without using

874) an external proxy.
875)     </p>
876) 
877)     <p>
878) If time permits and you are awesome enough to finish the above two tasks, you

879) will be working on the <a href="https://trac.torproject.org/projects/tor/query?status=!closed&component=TorBirdy">
880) remaining TorBirdy tickets</a>.

881)     </p>
882) 
883)     <p>

884) Applicants should be familiar with JavaScript (and preferably C++ as well). As
885) part of your application for this project, please submit code samples for
886) previous JavaScript projects that you have developed, or point us to projects
887) you have been involved with (links to a public Git/GitHub repository
888) preferred).  Prior extension development is a big plus and will be given
889) preference during application ranking.

890)     </p>
891) 
892)     <p>

893) You may contact the mentors on IRC for more information. (sukhe on #tor-dev, #tor on irc.oftc.net)

894)     </p>
895)     </li>
896) 

897)     <a id="improveHiddenServices"></a>
898)     <li>
899)     <b>Help improve Tor hidden services</b>
900)     <br>

901)     Language: <i>C</i>

902)     <br>

903)     Likely Mentors: <i>George (asn)</i>

904)     <br><br>

905)     <p>
906) We're working on a revamp of the entire Tor hidden service design to
907) improve the security and reliability of the hidden service system.
908)     </p>
909) 
910)     <p>
911) This is a big project: see

912) <a href="https://gitweb.torproject.org/torspec.git/tree/proposals/224-rend-spec-ng.txt">proposal

913) 224</a> for the latest design.  Are you interested in implementing some
914) part of that?
915)     </p>
916) 
917)     <p>
918) This is a very ambitious project, so we're deliberately not suggesting
919) particular sub-topics.  If you're interested in participating, try to
920) read and understand the <a

921) href="https://gitweb.torproject.org/torspec.git/tree/rend-spec.txt">existing

922) design</a> and the design proposal for the new design, and then talk to
923) us about what part you want to work on.
924)     </p>
925) 
926)     <p>
927) As part of the application process for this project, please contribute a
928) nontrivial patch to Tor -- ideally, one that will affect some part of
929) the codebase that you want to work on.
930)     </p>
931)     </li>
932) 

933)     <a id="exitmap_improvements"></a>
934)     <li>
935)     <b>Exitmap Improvements</b>
936)     <br>

937)     Language: <i>Python</i>

938)     <br>
939)     Likely Mentors: <i>Philipp (phw)</i>

940)     <br><br>

941)     <p>
942) The Tor Project makes use of the Python tool <a
943) href="https://gitweb.torproject.org/user/phw/exitmap.git/">Exitmap</a> to
944) systematically scan for malicious and misbehaving exit relays.  Once such a
945) relay is found, it is assigned the BadExit flag which prevents clients from
946) selecting the relay as last hop in their circuit.
947)     </p>
948) 
949)     <p>
950) Exitmap supports scanning modules which implement a specific scan over
951) exit relays.  Examples are the DNS module which checks for DNS poisoning
952) or the patching check module which looks out for tampered file
953) downloads.
954)     </p>
955) 
956)     <p>
957) This project is meant to extend exitmap in several ways.  First, it
958) should be made fully autonomous.  That means that exitmap should be able
959) to run in the background, periodically fetch new relay descriptors, and
960) have a smart algorithm which keeps scanning all exit relays
961) periodically.  Second, exitmap should be able to emulate some user
962) interaction and dynamically "explore" the web in order to detect
963) tampering.  Third, unit tests should be added for existing and new code
964) in order to make the code base more robust.
965)     </p>
966)     </li>

967) 

968)     <a id="expand_nyx"></a>
969)     <li>
970)     <b>Expand Nyx</b>
971)     <br>

972)     Language: <i>Python</i>

973)     <br>
974)     Likely Mentors: <i>Damian (atagar)</i>

975)     <br><br>

976)     <p>
977) Nyx (previously known as <a href="https://www.atagar.com/arm/">arm</a>) is an
978) ncurses monitor that provides Tor relay operators...
979)     </p>
980) 
981)     <ul>
982)       <li><a href="https://www.atagar.com/arm/images/screenshot_page1_full.png">bandwidth graphs and event log</a></li>
983)       <li><a href="https://www.atagar.com/arm/images/screenshot_page2_full.png">connections</a></li>
984)       <li><a href="https://www.atagar.com/arm/images/screenshot_page3_full.png">user's torrc</a></li>
985)       <li><a href="https://www.atagar.com/arm/images/screenshot_configPanel_full.png">config editor</a></li>
986)     </ul>
987) 
988)     <p>
989) Nyx is presently under development in preparation for its next release. If you
990) like python, terminals, and collaborating on an active codebase this just might
991) be the project for you!
992)     </p>
993) 
994)     <p>
995) Proposals should involve a grab-bag of moderately small improvements you'd like
996) to make. You're encouraged to brainstorm ideas of their own but here's a few to
997) get ya started...
998)     </p>
999) 
1000)     <ul>
1001)       <li>Bring back the <a href="https://www.atagar.com/arm/images/screenshot_interpretor_full.png">interpreter panel</a>. This panel was dropped when refactoring Nyx, but it would be a neat component to bring back. You can <a href="https://gitweb.torproject.org/nyx.git/tree/src/cli/interpretorPanel.py?h=release">find old code for it in the history</a> and Stem (the library backing Nyx) has a much improved <a href="https://stem.torproject.org/tutorials/down_the_rabbit_hole.html">variant of this we can leverage</a>. This task would involve writing the curses code around Stem's interpreter functions.</li>
1002)       <li>Windows support. Like most curses applications Nyx doesn't run natively on Windows. We've had dozens of users request this and <a href="https://trac.torproject.org/projects/tor/wiki/doc/arm#Windows">it should be possible</a>. This would involve supporting PDCurses and expanding Stem to be able to query the cpu/memory usage of the tor process.</li>
1003)       <li>Unit testing! Nyx has <a href="https://gitweb.torproject.org/nyx.git/tree/test">started adding tests</a> but it's still very minimal. Achieving any substantial code coverage will require us to figure out how to unit test curses components.</li>
1004)       <li>Onionoo provides additional relay information that could enrich our connection panel such as geoip and rdns. Trick is that at present we can only query it on a per-relay basis which would leak our connections (no-go for security). However, if we could get information about all relays in bulk it would sidestep this. For some old thoughts on this see <a href="https://trac.torproject.org/projects/tor/wiki/doc/arm#CircuitDetails">here</a>.</li>
1005)       <li>... and more! Again, don't hesitate to propose ideas of your own.</li>
1006)     </ul>
1007) 
1008)     <p>
1009)     <b>As part of your application for this project please get your hands wet with the codebase by contributing patches for <a href="https://gitweb.torproject.org/nyx.git">Nyx</a> and <a href="https://stem.torproject.org/faq.html#how-do-i-get-started">Stem</a>!</b>
1010)     </p>
1011)     </li>
1012) 

1013)     <a id="descriptor_parsing_in_go"></a>
1014)     <li>
1015)     <b>Stem Descriptor Parsing in Go</b>
1016)     <br>
1017)     Language: <i>Go, Python</i>
1018)     <br>
1019)     Likely Mentors: <i>Damian (atagar), Philipp (phw)</i>
1020)     <br><br>
1021)     <p>
1022)     Tor consists of two parts: the application and a distributed network of a
1023)     few thousand volunteer relays. Information about these relays is public,
1024)     and made up of documents called <b><a href="https://stem.torproject.org/tutorials/mirror_mirror_on_the_wall.html#what-is-a-descriptor">descriptors</a></b>. We have
1025)     <a href="https://stem.torproject.org/tutorials/mirror_mirror_on_the_wall.html#are-there-any-other-parsing-libraries">three libraries capable of reading these documents</a>...
1026)     </p>
1027) 
1028)     <ul>
1029)       <li><b><a href="https://stem.torproject.org/">Stem</a></b> (Python)</li>
1030)       <li><b><a href="https://gitweb.torproject.org/metrics-lib.git/">Metrics-lib</a></b> (Java)</li>
1031)       <li><b><a href="https://gitweb.torproject.org/user/phw/zoossh.git/">Zoossh</a></b> (Go)</li>
1032)     </ul>
1033) 
1034)     <p>
1035)     Stem is the most feature rich but slowest, and conversely Zoossh is fastest
1036)     but limited. But what if Stem used CFFI bindings to do the heavy lifting in
1037)     Go? Could we unify these libraries, getting the feature set of Stem with
1038)     the performance of Zoossh?
1039)     </p>
1040) 
1041)     <p>
1042)     <b>Applicants should be familiar with both Python and Go. As part of your
1043)     application for this project please write a demo CFFI binding for Stem as a
1044)     proof of concept.</b> Bonus points if you <a
1045)     href="https://stem.torproject.org/faq.html#how-do-i-get-started">get your
1046)     hands wet by contributing patches</a>!
1047)     </p>
1048)     </li>
1049) 

1050)     <a id="txtorcon_use_txaio"></a>
1051)     <li>
1052)     <b>Convert txtorcon to use txaio</b>
1053)     <br>
1054)     Language: <i>Python, asyncio, Twisted</i>
1055)     <br>
1056)     Likely Mentors: <i>meejah</i>
1057)     <br><br>
1058)     <p>
1059)     txtorcon is currently supports only Twisted users. Re-working txtorcon
1060)     to use the txaio library would allow users to choose between Twisted and
1061)     asyncio for the client code.
1062)     </p>
1063) 
1064)     <p>
1065)     This would involve fairly extensive refactoring to txtorcon, as it
1066)     currently makes heavy use of @inlineCallbacks which doesn't work with
1067)     txaio. A prospective student should be very familiar with event-based
1068)     programming in general, and be familiar with one of Twisted or asyncio.
1069)     See also: https://github.com/meejah/txtorcon/issues/135
1070)     </p>
1071)     </li>
1072) 
1073)     <a id="txtorcon_use_pytest"></a>
1074)     <li>
1075)     <b>Convert txtorcon to py.test</b>
1076)     <br>
1077)     Language: <i>Python, Twisted</i>
1078)     <br>
1079)     Likely Mentors: <i>meejah</i>
1080)     <br><br>
1081)     <p>
1082)     Currently txtorcon uses the built-in "unittest" module, as well as
1083)     Twisted's Deferred-respecting extensions on top. However, meejah has
1084)     found py.test's "fixture" approach to be much more powerful in other
1085)     situations.
1086)     </p>
1087) 
1088)     <p>
1089)     This project would be to port at least part of txtorcon's test-suite to
1090)     use py.test style tests and fixtures and evaluate: are the tests easier
1091)     to read? are there fewer lines of code? If so, the rest of the suite
1092)     should be ported and txtorcon switched over to use py.test exclusively.
1093)     </p>
1094) 
1095)     <p>
1096)     As some of txtorcon's tests aren't very well-written, this would take a
1097)     prospective student who is very strong in unit-testing knowledge. As
1098)     txtorcon is event-based, familiarity with that style of programming
1099)     (preferrably with Twisted) is ideal.
1100)     See also: https://github.com/meejah/txtorcon/issues/136
1101)     </p>
1102)     </li>
1103) 

1104)     <a id="coniks_in_messenger"></a>
1105)     <li>
1106)     <b>Implement and Integrate CONIKS for Tor Messenger</b>
1107)     <br>

1108)     Language: <i>C, JavaScript</i>

1109)     <br>
1110)     Likely Mentors: <i>Marcela, Arlo (arlolra)</i>

1111)     <br><br>

1112)     <p>
1113) CONIKS is an end-user key management and verification system for end-to-end
1114) secure communication services, which improves upon existing key management
1115) systems by providing both strong security and better usability using a model
1116) called key transparency. CONIKS does this by requiring providers to manage
1117) tamper-evident, publicly-auditable key directories, which contain mappings from
1118) usernames to public keys, on behalf of their users. This design makes it easier
1119) for users (both "default" users and power users) to establish trust since they
1120) don't have to worry about or even see keys, but users also don't have to
1121) trust the provider to be well-behaved because the CONIKS client can run as
1122) part of the secure messaging app and automatically check that the service
1123) provider doesn’t map spurious keys to their users' usernames, and it can
1124) verify that observed name-to-key mappings are consistent with what other
1125) clients in the system are seeing. Unlike existing key transparency solutions,
1126) CONIKS also provides strong privacy guarantees by employing cryptographic
1127) primitives for robust data obfuscation.
1128)     </p>
1129) 
1130)     <p>
1131) The CONIKS system design, protocols, and proof-of-concept are described in
1132) great detail in the <a
1133) href="https://www.usenix.org/system/files/conference/usenixsecurity15/sec15-paper-melara.pdf">CONIKS
1134) research paper</a>, and basic reference implementations of a CONIKS key server
1135) and a CONIKS client are avialable on <a
1136) href="https://github.com/coniks-sys/coniks-ref-implementation">Github</a>.
1137)     </p>
1138) 
1139)     <p>
1140) This project has two main components: (1) designing and implementing a CONIKS
1141) key server tailored to Tor Messenger users, and (2) building a CONIKS client
1142) which integrates with the Tor Messenger client. One challenge the applicant
1143) will face is ensuring that the key server design is efficient and scalable for
1144) large volumes of users, concurrent traffic and guarantees this scalability even
1145) as Tor Messenger's user base grows. On the client side, the main challenges
1146) will be to focus on space efficiency as well as minimizing computational
1147) overhead when implementing the CONIKS consistency checks, and determining how
1148) to best communicate CONIKS consistency check results to users in the UI. Since
1149) Tor Messenger does not hand out online identities per se, as most online
1150) communication services do (like, say, Twitter, in which each user has a unique
1151) handle), the CONIKS key server for Tor Messenger will have to map usernames
1152) from third-party communication services to the encryption keys used in Tor
1153) Messenger. One additional important challenge that the applicant will have to
1154) help address is ensuring that each such third-party username remains unique in
1155) the Tor Messenger space and that such external, third-party identities are
1156) indeed controlled by the expected user of that third-party communication
1157) service.
1158)     </p>
1159) 
1160)     <p>
1161) Some design and implementation questions have been discussed in <a
1162) href="https://trac.torproject.org/projects/tor/ticket/17961">Ticket #17961</a>.
1163)     </p>
1164) 
1165)     <p>
1166) The applicant should have some familiarity with well-known crypto primitives
1167) and algorithms, as well as have a basic understanding of the key transparency
1168) model. Client side integration will require some basic use of JavaScript.
1169) Consider submitting a patch for <a
1170) href="https://github.com/arlolra/ctypes-otr/issues">one of the open key
1171) verification issues</a> as part of the application process.
1172)     </p>
1173)     </li>

1174) 
1175)     <a id="panopticlick"></a>
1176)     <li>
1177)     <b>Panopticlick</b>
1178)     <br>
1179)     Likely Mentors: <i>Georg (GeKo)</i>
1180)     <p>
1181) 
1182) The <a href="https://panopticlick.eff.org">Panopticlick project by the EFF</a>
1183) revolutionized how people think about <a
1184) href="https://panopticlick.eff.org/browser-uniqueness.pdf">browser
1185) fingerprinting</a>, both by developing tests and metrics to measure browser
1186) fingerprintability, and by crowdsourcing the evaluation and contribution of
1187) individual browser features to overall fingerprintability.
1188) 
1189)     </p>
1190)     <p>
1191) 
1192) Unfortunately, the way Panopticlick is designed <a
1193) href="https://blog.torproject.org/blog/effs-panopticlick-and-torbutton">makes
1194) it difficult</a> to evaluate defenses to browser fingerprinting, especially
1195) for browsers with a relatively small userbase such as Tor Browser. This is
1196) because any approach we take to reduce fingerprinting automatically makes our
1197) users more distinct from the previous users who submitted their fingerprint
1198) data to the EFF. Indeed, it is also impossible to ever expect that users of
1199) one browser will ever be able to blend in with users of another browser
1200) (Chrome users will always be distinguishable from Firefox users for example,
1201) based on feature set alone).
1202) 
1203)    </p>
1204)    <p>
1205) 
1206) To address this, we would like to have <a
1207) href="https://trac.torproject.org/projects/tor/ticket/6119">our own
1208) fingerprint test suite</a> to evaluate the fingerprintability of each browser
1209) feature for users running a specific Tor Browser version. There are also <a
1210) href="https://trac.torproject.org/projects/tor/query?keywords=~tbb-fingerprinting">additional
1211) fingerprinting tests</a> we can add beyond those deployed by Panopticlick.
1212)    </p>
1213)    <p>
1214) 
1215) For this project, the student would develop a website that users can
1216) voluntarily visit to test and record their Tor Browser fingerprint.  The user
1217) should get feedback on how she performed and the test results should be
1218) available in a machine readable format (e.g. JSON), broken down by Tor Browser
1219) version.  In a second step one could think about adding more sophisticated
1220) tests or supporting other browser vendors that might want to test the
1221) uniformity amongst their userbase as well. Of course, results from each
1222) browser would also need to be broken down by both browser implementation and
1223) version, so that results would only reflect the population of that specific
1224) implementation.
1225) 
1226)     </p>
1227)     </li>
1228) 

1229)     <a id="stegotorus"></a>
1230)     <li>
1231)     <b>Make Stegotorus deployment ready</b>
1232)     <br>
1233)     Language: <i>C++</i>
1234)     <br>
1235)     Likely Mentors: <i>vmon</i>
1236)     <br><br>
1237)     <p>
1238)     <a
1239)     href="https://github.com/TheTorProject/stegotorus/tree/master/src">Stegotorus</a>
1240)     is a PT framework which streamline the development stealthier pluggable
1241)     transport. An HTTP pluggable transport is already implemented in Stegotorus
1242)     framework and can be used when encrypted payloads are throttled and only
1243)     ephemeral connections are tolerated.
1244)     </p>
1245) 
1246)     <p>
1247)     The majority of work on Stegotorus is done and it can be deployed with a relatively minor improvements including:
1248)     </p>
1249) 
1250)     <ul>
1251)       <li><b>#8098 A config file file for Stegotorus</b>
1252)         <p>
1253)         Stegotorus needs many configuration settings specially on the bridge
1254)         side. This include also the configuration required by each steg module.
1255)         Currently the configuration is fed to Stegotorus as command line
1256)         arguments but a file like torrc is needed so all tweaking can be read
1257)         from there.
1258)         </p>
1259) 
1260)         <p><i>
1261)         Current Status and work needed to be done: The code for reading the
1262)         config file is written by SRI but it is not yet used in the Stegotorus
1263)         to read the config.
1264)         </i></p>
1265)       </li>
1266) 
1267)       <li><b>#8101 Debugging the transparent proxy</b>
1268)         <p>
1269)         Stegotorus http module uses other websites payload to hide and serve
1270)         censored traffic. As such it needs to decide if the request is
1271)         genuinely to the auxiliary website, in that case becomes a transparent
1272)         proxy and serves the website content as requested, or if the request is
1273)         actually a request to serve censored material which should be delivered
1274)         to steg modules.
1275)         </p>
1276) 
1277)         <p><i>
1278)         Current Status: This is completely implemented. However, the transparent proxy sometimes crashes and need to be triaged, debugged and fixed.
1279)         </i></p>
1280)       </li>
1281) 
1282)       <li><b>#11337 refactoring the steg module code</b>
1283)         <p>
1284)         The http steg module code, although not essentials to the core of the
1285)         Stegotorus. needs some improvement and clean up. The solution is to
1286)         refactor the steg modules as children of FileStegMod.
1287)         </p>
1288) 
1289)         <p><i>
1290)         Current status and work needed to be done: This has already been done
1291)         but still needs testing and refactoring before it can be reliably merge
1292)         to the master branch.
1293)         </i></p>
1294)       </li>
1295) 
1296)       <li><b>#8089 Adding Elligator to Stegotorus handshake and test</b>
1297)         <p>
1298)         The current Stegotorus handshake is distinguishable from random byte
1299)         string, which can be used to flag and detect Stegotorus traffic
1300)         deterministically and need to be implemented similar to
1301)         ScrambleSuite. Also because the capacity of client to server channel
1302)         might be slim depending on the choice of steg module it is desirable
1303)         to be implemented using Elliptic curve crypto. Hence, Elligator
1304)         protocol is ideal solution for this situation. All we need is to replace Stegotorus handshake by Elligator.
1305)         </p>
1306) 
1307)         <p><i>
1308)         Current Status and work needed to be done: Elligator handshake code is
1309)         included in stegotorus code base, it is only needed to be called by
1310)         instead of the current handshake and be tested.
1311)         </i></p>
1312)       </li>
1313) 
1314)       <li><b>Make Stegotorus memory safe by using shared pointers</b>
1315)         <p>
1316)         Stegotorus has large code base and it is not written in a memory safe
1317)         languages. To facilitate its audit, we need to replace (almost all) use
1318)         of pointers to shared pointers.
1319)         </p>
1320) 
1321)         <p><i>
1322)         Current Status: No progress has not been done.
1323)         </i></p>
1324)       </li>
1325) 
1326)       <li><b>Security Audit and writing more unit test</b>
1327)         <p>
1328)         To be able to deploy Stegotorus for real world use we need to audit the
1329)         code and write more unit test covering new aspects of the Stegotorus
1330)         (new http transport, proxy server, Elligator handshake)
1331)         </p>
1332) 
1333)         <p><i>
1334)         Current Status: No progress has been done.
1335)         </i></p>
1336)       </li>
1337) 
1338)       <li><b>SRI branch merging</b>
1339)         <p>
1340)         Stegotorus has been forked from the initial development from SRI. Now
1341)         that SRI is hosting Stegotorus publicly it is desirable to merge the
1342)         two branches so we can benefit from both developments.
1343)         </p>
1344) 
1345)         <p><i>
1346)         Current Status: No progress has been done.
1347)         </i></p>
1348)       </li>
1349) 
1350)       <li><b>#8099 deterministic build</b>
1351)         <p>
1352)         To make deterministic build possible we need to build many of
1353)         Stegotorus dependency from scratch. Boost library is a a huge
1354)         dependency for Stegotorus to access the file system. As we are only
1355)         planning to deploy Stegotorus bridges on Linux machines we can simplify
1356)         such access without that dependency. By dropping such dependency, it
1357)         should be straight forward to have deterministic build for Stegotorus.
1358)         </p>
1359) 
1360)         <p><i>
1361)         Current Status: No progress has been done.
1362)         </i></p>
1363)       </li>
1364)     </ul>
1365)     </li>
1366) 

1367) <!--
1368)     <a id=""></a>
1369)     <li>
1370)     <b></b>
1371)     <br>

1372)     Language: <i>Python</i>

1373)     <br>
1374)     Likely Mentors: <i>Damian (atagar)</i>

1375)     <br><br>

1376)     <p>
1377) 
1378)     </p>
1379) 
1380)     <p>
1381) 
1382)     </p>
1383)     </li>
1384) -->
1385) 

1386)     <li>
1387)     <b>Bring up new ideas!</b>

1388)     <br>

1389)     Don't like any of these? Look at the <a

1390)     href="/press/presskit/2008-12-19-roadmap-full.pdf">Tor development

1391)     roadmap</a> for more ideas, or just try out Tor and Tor Browser,

1392)     and find out what you think needs fixing.

1393)     Some of the <a href="<spectree>proposals">current proposals</a>

1394)     might also be short on developers.
1395)     </li>

1396) 

1397)     </ol>

1398) 

1399)     <a id="OtherCoding"></a>
1400)     <h2><a class="anchor" href="#OtherCoding">Other Coding and Design related ideas</a></h2>
1401)     <ol>
1402)     <li>Tor relays don't work well on Windows XP. On
1403)     Windows, Tor uses the standard <tt>select()</tt> system
1404)     call, which uses space in the non-page pool. This means
1405)     that a medium sized Tor relay will empty the non-page pool, <a

1406)     href="<wiki>doc/WindowsBufferProblems">causing

1407)     havoc and system crashes</a>. We should probably be using overlapped IO
1408)     instead. One solution would be to teach <a
1409)     href="http://www.monkey.org/~provos/libevent/">libevent</a> how to use
1410)     overlapped IO rather than select() on Windows, and then adapt Tor to
1411)     the new libevent interface. Christian King made a
1412)     <a href="https://svn.torproject.org/svn/libevent-urz/trunk/">good
1413)     start</a> on this in the summer of 2007.</li>

1414) 

1415)     <li>We need a flexible simulator framework for studying end-to-end
1416)     traffic confirmation attacks. Many researchers have whipped up ad hoc
1417)     simulators to support their intuition either that the attacks work
1418)     really well or that some defense works great. Can we build a simulator
1419)     that's clearly documented and open enough that everybody knows it's
1420)     giving a reasonable answer? This will spur a lot of new research.
1421)     See the entry <a href="#Research">below</a> on confirmation attacks for
1422)     details on the research side of this task &mdash; who knows, when it's
1423)     done maybe you can help write a paper or three also.</li>

1424) 

1425)     <li>Tor 0.1.1.x and later include support for hardware crypto
1426)     accelerators via OpenSSL. It has been lightly tested and is
1427)     possibly very buggy.  We're looking for more rigorous testing,

1428)     performance analysis, and optimally, code fixes to OpenSSL and

1429)     Tor if needed.</li>

1430) 

1431)     <li>Write a <a
1432)     href="https://secure.wikimedia.org/wikipedia/en/wiki/Fuzz_testing">fuzzer</a>
1433)     for Tor to discover security vulnerabilities. Determine if there
1434)     are good fuzzing frameworks out there for what we want. Win fame by

1435)     getting credit when we put out a new release because of you!</li>

1436) 

1437)     <li>Tor uses TCP for transport and TLS for link
1438)     encryption. This is nice and simple, but it means all cells
1439)     on a link are delayed when a single packet gets dropped, and
1440)     it means we can only reasonably support TCP streams. We have a <a

1441)     href="<page docs/faq>#TransportIPnotTCP">list

1442)     of reasons why we haven't shifted to UDP transport</a>, but it would
1443)     be great to see that list get shorter. We also have a proposed <a

1444)     href="<specblob>proposals/100-tor-spec-udp.txt">specification

1445)     for Tor and
1446)     UDP</a> &mdash; please let us know what's wrong with it.</li>

1447) 

1448)     <li>We're not that far from having IPv6 support for destination addresses
1449)     (at exit nodes). If you care strongly about IPv6, that's probably the
1450)     first place to start.</li>

1451) 

1452)     <li>We need a way to generate the website diagrams (for example, the "How
1453)     Tor Works" pictures on the <a href="<page about/overview>">overview page</a>
1454)     from source, so we can translate them as UTF-8 text rather than edit
1455)     them by hand with Gimp. We might want to
1456)     integrate this as an wml file so translations are easy and images are
1457)     generated in multiple languages whenever we build the website.</li>

1458) 

1459)     <li>How can we make the various LiveCD/USB systems easier
1460)     to maintain, improve, and document?  One example is <a

1461)     href="https://tails.boum.org/">The Amnesic Incognito Live

1462)     System</a>.
1463)     </li>

1464) 

1465)     <li>
1466)     Another anti-censorship project is to try to make Tor
1467)     more scanning-resistant.  Right now, an adversary can identify <a

1468)     href="<specblob>proposals/125-bridges.txt">Tor bridges</a>

1469)     just by trying to connect to them, following the Tor protocol,
1470)     and seeing if they respond.  To solve this, bridges could <a
1471)     href="<svnprojects>design-paper/blocking.html#tth_sEc9.3">act like
1472)     webservers</a> (HTTP or HTTPS) when contacted by port-scanning tools,
1473)     and not act like bridges until the user provides a bridge-specific key.
1474)     To start, check out Shane Pope's <a
1475)     href="http://dl.dropbox.com/u/37735/index.html">thesis and prototype</a>.
1476)     </li>

1477) 

1478)     </ol>

1479) 

1480)     <a id="Research"></a>
1481)     <h2><a class="anchor" href="#Research">Research</a></h2>
1482)     <ol>
1483)     <li>The "end-to-end traffic confirmation attack":
1484)     by watching traffic at Alice and at Bob, we can <a
1485)     href="http://freehaven.net/anonbib/#danezis:pet2004">compare
1486)     traffic signatures and become convinced that we're watching the same
1487)     stream</a>. So far Tor accepts this as a fact of life and assumes this
1488)     attack is trivial in all cases. First of all, is that actually true? How
1489)     much traffic of what sort of distribution is needed before the adversary
1490)     is confident he has won? Are there scenarios (e.g. not transmitting much)
1491)     that slow down the attack? Do some traffic padding or traffic shaping
1492)     schemes work better than others?</li>
1493)     <li>A related question is: Does running a relay/bridge provide additional
1494)     protection against these timing attacks? Can an external adversary that can't
1495)     see inside TLS links still recognize individual streams reliably?
1496)     Does the amount of traffic carried degrade this ability any? What if the
1497)     client-relay deliberately delayed upstream relayed traffic to create a queue
1498)     that could be used to mimic timings of client downstream traffic to make it
1499)     look like it was also relayed? This same queue could also be used for masking
1500)     timings in client upstream traffic with the techniques from <a
1501)     href="http://www.freehaven.net/anonbib/#ShWa-Timing06">adaptive padding</a>,
1502)     but without the need for additional traffic. Would such an interleaving of
1503)     client upstream traffic obscure timings for external adversaries? Would the
1504)     strategies need to be adjusted for asymmetric links? For example, on
1505)     asymmetric links, is it actually possible to differentiate client traffic from
1506)     natural bursts due to their asymmetric capacity? Or is it easier than
1507)     symmetric links for some other reason?</li>
1508)     <li>Repeat Murdoch and Danezis's <a
1509)     href="http://www.cl.cam.ac.uk/~sjm217/projects/anon/#torta">attack from
1510)     Oakland 05</a> on the current Tor network. See if you can learn why it
1511)     works well on some nodes and not well on others. (My theory is that the
1512)     fast nodes with spare capacity resist the attack better.) If that's true,
1513)     then experiment with the RelayBandwidthRate and RelayBandwidthBurst
1514)     options to run a relay that is used as a client while relaying the
1515)     attacker's traffic: as we crank down the RelayBandwidthRate, does the
1516)     attack get harder? What's the right ratio of RelayBandwidthRate to
1517)     actually capacity? Or is it a ratio at all? While we're at it, does a
1518)     much larger set of candidate relays increase the false positive rate
1519)     or other complexity for the attack? (The Tor network is now almost two
1520)     orders of magnitude larger than it was when they wrote their paper.) Be
1521)     sure to read <a href="http://freehaven.net/anonbib/#clog-the-queue">Don't
1522)     Clog the Queue</a> too.</li>
1523)     <li>The "routing zones attack": most of the literature thinks of
1524)     the network path between Alice and her entry node (and between the
1525)     exit node and Bob) as a single link on some graph. In practice,
1526)     though, the path traverses many autonomous systems (ASes), and <a
1527)     href="http://freehaven.net/anonbib/#feamster:wpes2004">it's not uncommon
1528)     that the same AS appears on both the entry path and the exit path</a>.
1529)     Unfortunately, to accurately predict whether a given Alice, entry,
1530)     exit, Bob quad will be dangerous, we need to download an entire Internet
1531)     routing zone and perform expensive operations on it. Are there practical
1532)     approximations, such as avoiding IP addresses in the same /8 network?</li>
1533)     <li>Other research questions regarding geographic diversity consider
1534)     the tradeoff between choosing an efficient circuit and choosing a random
1535)     circuit. Look at Stephen Rollyson's <a
1536)     href="http://swiki.cc.gatech.edu:8080/ugResearch/uploads/7/ImprovingTor.pdf">position
1537)     paper</a> on how to discard particularly slow choices without hurting
1538)     anonymity "too much". This line of reasoning needs more work and more
1539)     thinking, but it looks very promising.</li>
1540)     <li>Tor doesn't work very well when relays have asymmetric bandwidth
1541)     (e.g. cable or DSL). Because Tor has separate TCP connections between
1542)     each hop, if the incoming bytes are arriving just fine and the outgoing
1543)     bytes are all getting dropped on the floor, the TCP push-back mechanisms
1544)     don't really transmit this information back to the incoming streams.
1545)     Perhaps Tor should detect when it's dropping a lot of outgoing packets,
1546)     and rate-limit incoming streams to regulate this itself? I can imagine
1547)     a build-up and drop-off scheme where we pick a conservative rate-limit,
1548)     slowly increase it until we get lost packets, back off, repeat. We
1549)     need somebody who's good with networks to simulate this and help design
1550)     solutions; and/or we need to understand the extent of the performance
1551)     degradation, and use this as motivation to reconsider UDP transport.</li>
1552)     <li>A related topic is congestion control. Is our
1553)     current design sufficient once we have heavy use? Maybe
1554)     we should experiment with variable-sized windows rather
1555)     than fixed-size windows? That seemed to go well in an <a

1556)     href="http://www.psc.edu/index.php/hpn-ssh/638">ssh

1557)     throughput experiment</a>. We'll need to measure and tweak, and maybe
1558)     overhaul if the results are good.</li>
1559)     <li>Our censorship-resistance goals include preventing
1560)     an attacker who's looking at Tor traffic on the wire from <a
1561)     href="<svnprojects>design-paper/blocking.html#sec:network-fingerprint">distinguishing
1562)     it from normal SSL traffic</a>. Obviously we can't achieve perfect
1563)     steganography and still remain usable, but for a first step we'd like to
1564)     block any attacks that can win by observing only a few packets. One of
1565)     the remaining attacks we haven't examined much is that Tor cells are 512
1566)     bytes, so the traffic on the wire may well be a multiple of 512 bytes.
1567)     How much does the batching and overhead in TLS records blur this on the
1568)     wire? Do different buffer flushing strategies in Tor affect this? Could
1569)     a bit of padding help a lot, or is this an attack we must accept?</li>
1570)     <li>Tor circuits are built one hop at a time, so in theory we have the
1571)     ability to make some streams exit from the second hop, some from the
1572)     third, and so on. This seems nice because it breaks up the set of exiting
1573)     streams that a given relay can see. But if we want each stream to be safe,
1574)     the "shortest" path should be at least 3 hops long by our current logic, so
1575)     the rest will be even longer. We need to examine this performance / security
1576)     tradeoff.</li>
1577)     <li>It's not that hard to DoS Tor relays or directory authorities. Are client
1578)     puzzles the right answer? What other practical approaches are there? Bonus
1579)     if they're backward-compatible with the current Tor protocol.</li>
1580)     <li>Programs like <a

1581)     href="<page docs/torbutton/index>">Torbutton</a> aim to hide

1582)     your browser's UserAgent string by replacing it with a uniform answer for
1583)     every Tor user. That way the attacker can't splinter Tor's anonymity set
1584)     by looking at that header. It tries to pick a string that is commonly used
1585)     by non-Tor users too, so it doesn't stand out. Question one: how badly
1586)     do we hurt ourselves by periodically updating the version of Firefox
1587)     that Torbutton claims to be? If we update it too often, we splinter the
1588)     anonymity sets ourselves. If we don't update it often enough, then all the
1589)     Tor users stand out because they claim to be running a quite old version
1590)     of Firefox. The answer here probably depends on the Firefox versions seen
1591)     in the wild. Question two: periodically people ask us to cycle through N
1592)     UserAgent strings rather than stick with one. Does this approach help,
1593)     hurt, or not matter? Consider: cookies and recognizing Torbutton users
1594)     by their rotating UserAgents; malicious websites who only attack certain
1595)     browsers; and whether the answers to question one impact this answer.
1596)     </li>
1597)     <li>How many bridge relays do you need to know to maintain
1598)     reachability? We should measure the churn in our bridges. If there is
1599)     lots of churn, are there ways to keep bridge users more likely to stay
1600)     connected?
1601)     </li>
1602)     </ol>

1603) 

1604)     <p>
1605)     <a href="<page about/contact>">Let us know</a> if you've made progress on any
1606)     of these!
1607)     </p>
1608)   </div>
1609)   <!-- END MAINCOL -->
1610)   <div id = "sidecol">
1611) #include "side.wmi"
1612) #include "info.wmi"
1613)   </div>
1614)   <!-- END SIDECOL -->
1615) </div>
1616) <!-- END CONTENT -->