git.schokokeks.org
Repositories
Help
Report an Issue
tor-webwml.git
Code
Commits
Branches
Tags
Suche
Strukturansicht:
ffe5443e5
Branches
Tags
bridges
docs-debian
jobs
master
press-clips
tor-webwml.git
docs
en
pluggable-transports.wml
Add links to PT bundles in the PT page.
George Kadianakis
commited
ffe5443e5
at 2013-06-23 11:48:31
pluggable-transports.wml
Blame
History
Raw
## translation metadata # Revision: $Revision$ # Translation-Priority: 3-low #include "head.wmi" TITLE="Tor Project: Pluggable Transports" CHARSET="UTF-8" <div id="content" class="clearfix"> <div id="breadcrumbs"> <a href="<page index>">Home » </a> <a href="<page docs/documentation>">Documentation » </a> <a href="<page docs/pluggable-transports>">Pluggable Transports</a> </div> <div id="maincol"> <h2>Tor: Pluggable Transports</h2> <hr> <p> An increasing number of censoring countries are using Deep Packet Inspection (DPI) to classify Internet traffic flows by protocol. While Tor uses <a href="<page docs/bridges>">bridge relays</a> to get around a censor that blocks by IP address, the censor can use DPI to recognize and filter Tor traffic flows even when they connect to unexpected IP addresses. </p> <p> Pluggable transports transform the Tor traffic flow between the client and the bridge. This way, censors who monitor traffic between the client and the bridge will see innocent-looking transformed traffic instead of the actual Tor traffic. External programs can talk to Tor clients and Tor bridges using the <a href="https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/180-pluggable-transport.txt">pluggable transport API</a>, to make it easier to build interoperable programs. </p> <hr> <ul> <li><b>Obfsproxy</b> is a Python framework for implementing new pluggable transports. It uses Twisted for its networking needs, and <a href="https://gitweb.torproject.org/pluggable-transports/pyptlib.git/blob/HEAD:/README.rst">pyptlib</a> for some pluggable transport-related features. It supports the <a href="https://gitweb.torproject.org/pluggable-transports/obfsproxy.git/blob/HEAD:/doc/obfs2/obfs2-protocol-spec.txt">obfs2</a> and <a href="https://gitweb.torproject.org/pluggable-transports/obfsproxy.git/blob/HEAD:/doc/obfs3/obfs3-protocol-spec.txt">obfs3</a> pluggable transports. Maintained by George Kadianakis. <br> Status: <a href="https://www.torproject.org/projects/obfsproxy.html.en#download">Deployed</a> </li> <li><b>Flashproxy</b> turns ordinary web browsers into bridges using websockets, and has a little python stub to hook Tor clients to the websocket connection. See its <a href="http://crypto.stanford.edu/flashproxy/">web page</a>, <a href="https://gitweb.torproject.org/flashproxy.git">git repository</a>, and <a href="http://crypto.stanford.edu/flashproxy/flashproxy.pdf">design paper</a>. Maintained by David Fifield. # <iframe src="//crypto.stanford.edu/flashproxy/embed.html" width="80" height="15" frameborder="0" scrolling="no"></iframe> <br> Status: <a href="https://crypto.stanford.edu/flashproxy/#how-to">Deployed</a> </li> <li><b>ScrambleSuit</b> is a pluggable transport that protects against follow-up probing attacks and is also capable of changing its network fingerprint (packet length distribution, inter-arrival times, etc.). It's part of the Obfsproxy framework. See its <a href="http://www.cs.kau.se/philwint/scramblesuit/">official page</a>. Maintained by Philipp Winter. <br> Status: <em>Undeployed</em> </li> <li><b>StegoTorus</b> is an Obfsproxy fork that extends it to a) split Tor streams across multiple connections to avoid packet size signatures, and b) embed the traffic flows in traces that look like html, javascript, or pdf. See its <a href="https://gitweb.torproject.org/stegotorus.git">git repository</a>. Maintained by Zack Weinberg. <br> Status: <em>Undeployed</em> </li> <li><b>SkypeMorph</b> transforms Tor traffic flows so they look like Skype Video. See its <a href="http://crysp.uwaterloo.ca/software/SkypeMorph-0.5.1.tar.gz">source code</a> and <a href="http://cacr.uwaterloo.ca/techreports/2012/cacr2012-08.pdf">design paper</a>. Maintained by Ian Goldberg. <br> Status: <em>Undeployed</em> </li> <li><b>Dust</b> aims to provide a packet-based (rather than connection-based) DPI-resistant protocol. See its <a href="https://github.com/blanu/Dust">git repository</a>. Maintained by Brandon Wiley. <br> Status: <em>Undeployed</em> </li> <li><b>Format-Transforming Encryption</b> transforms Tor traffic to arbitrary formats using their language descriptions. See the <a href="https://eprint.iacr.org/2012/494">research paper</a>. <br> Status: <em>Undeployed</em> </li> </ul> <hr> <p> Our goal is to have a wide variety of pluggable transport designs. Many are at the research phase now, so it's a perfect time to play with them or suggest new designs. Please let us know if you find or start other projects that could be useful for making Tor's traffic flows more DPI-resistant! </p> <hr> <h2><a class="anchor" href="#download">Download the Pluggable Transports Tor Browser Bundle</a></h2> <p> <a href="/dist/torbrowser/tor-pluggable-transports-browser-<version-torobfsbundlealpha>_en-US.exe">Windows Obfsproxy Tor Browser Bundle</a> (<a href="/dist/torbrowser/tor-pluggable-transports-browser-<version-torobfsbundlealpha>_en-US.exe.asc">signature</a>). </p> <p> <a href="/dist/torbrowser/osx/TorBrowser-Pluggable-Transports-<version-torobfsbundleosx32alpha>-osx-i386-en-US.zip">OSX (10.6 & 10.7) Obfsproxy Tor Browser Bundle</a> (<a href="/dist/torbrowser/osx/TorBrowser-Pluggable-Transports-<version-torobfsbundleosx32alpha>-osx-i386-en-US.zip.asc">signature</a>). </p> <p> <a href="/dist/torbrowser/linux/tor-pluggable-transports-browser-gnu-linux-i686-<version-torobfsbundlelinux32alpha>-dev-en-US.tar.gz">Linux 32-bit Obfsproxy Tor Browser Bundle</a> (<a href="/dist/torbrowser/linux/tor-pluggable-transports-browser-gnu-linux-i686-<version-torobfsbundlelinux32alpha>-dev-en-US.tar.gz.asc">signature</a>). </p> <p> <a href="/dist/torbrowser/linux/tor-pluggable-transports-browser-gnu-linux-x86_64-<version-torobfsbundlelinux64alpha>-dev-en-US.tar.gz">Linux 64-bit Obfsproxy Tor Browser Bundle</a> (<a href="/dist/torbrowser/linux/tor-pluggable-transports-browser-gnu-linux-x86_64-<version-torobfsbundlelinux64alpha>-dev-en-US.tar.gz.asc">signature</a>). </p> </div> <!-- END MAINCOL --> <div id = "sidecol"> #include "side.wmi" #include "info.wmi" </div> <!-- END SIDECOL --> </div> <!-- END CONTENT --> #include <foot.wmi>