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22-10-2018-weekshop.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Anonymity Online: Tor</title>
<meta name="description" content="Anonymity Online: Tor">
<meta name="author" content="Vasilis Ververis">
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<div class="reveal">
<div class="slides">
<section>
<section data-background="22-10-2018-weekshop-images/Color.svg" style="background-color:rgba(0,0,0,0.6);" data-background-size="100vh">
Anonymity Online: Tor
<br>
<br>
<p>
<small><a href="mailto:[email protected]">Vasilis Ververis ([email protected])</a></small>
<small>
<small>
GPG Fingerprint: 8FD5 CF5F 39FC 03EB B382 7470 5FBF 70B1 D126 0162
<br>
Public Key: <a href="https://pgp.mit.edu/pks/lookup?op=get&search=0x5FBF70B1D1260162">https://pgp.mit.edu/pks/lookup?op=get&search=0x5FBF70B1D1260162</a>
</small>
</small>
<br>
<small><a href="mailto:[email protected]">Francisco Core ([email protected])</a></small>
</p>
</section>
<section data-background="22-10-2018-weekshop-images/onion-net.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/onion-net.png" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
The Tor project
<p>
<small>
Mission: be the global resource for technology,
advocacy, research and education in the ongoing pursuit
of freedom of speech, privacy rights online, and
censorship circumvention.
</small>
</p>
</section>
<section>
What is Tor?
<ul>
<li>Online anonymity</li>
<ul>
<li>FL/OSS</li>
<li>Open (volunteer based) network</li>
</ul>
<li>Community: researchers, developers, users, relay
operators, [...]</li>
<li>U.S. 501(c)(3) non-profit organization</li>
</ul>
</section>
<section data-background="22-10-2018-weekshop-images/userstats-relay-country-all-2018-03-24-2018-10-22-off.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/userstats-relay-country-all-2018-03-24-2018-10-22-off.png" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
Estimated ~2,000,000+ Tor users (daily)
</section>
</section>
<section>
<section>
<h2>How Internet Works?</h2>
</section>
<section data-background="22-10-2018-weekshop-images/Internet_map_1024_-_transparent,_inverted-Internet_map_1024_-_transparent,_inverted.png" data-background-size="100vh" data-background-color=#ffffff>
<span class="attribution"><small><small>Source: <a href="https://commons.wikimedia.org/wiki/File:Internet_map_1024_-_transparent,_inverted.png">Mapa parcial de Internet basado en la información obtenida del sitio opte.org el 15 de enero de 2005</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/Internet_map_1024_-_transparent,_inverted-Internet_map_1024_-_transparent,_inverted.png" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
A gigantic network of "computers", servers and devices
</section>
<section data-background="22-10-2018-weekshop-images/internet-schema-5.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://mdn.mozillademos.org/files/8449/internet-schema-5.png">About MDN by Mozilla Contributors is licensed under CC-BY-SA 2.5</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/internet-schema-5.png" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
Every PC, server, device, refrigerator,... requires a unique identifier - "IP address"
</section>
<section>
<ul>
<li>Internet is not the WWW (World Wide Web)</li>
<li>Internet is the infrastructure</li>
<li>Web is a service of this infrastructure</li>
</ul>
</section>
<section data-background="22-10-2018-weekshop-images/We_know_where_you_are.jpg" data-background-size="90vh">
<span class="attribution"><small><small>Source: <a href="https://commons.wikimedia.org/wiki/File:We_know_where_you_are_(71797).jpg">Rhododendrites</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/We_know_where_you_are.jpg" style="background-color:rgba(0,0,0,0.8);" data-background-size="90vh">
On the Internet we are sending (a lot) of private data:
<br>
<ul>
<li>Source/destination IP address</li>
<ul>
<li>Geographical location</li>
</ul>
</ul>
</section>
<section>
<ul>
<li>WWW (World Wide Web):</li>
<ul>
<li>Web Browser</li>
<li>Operating system</li>
<li>Addons/Extensions</li>
</ul>
<ul>
</section>
<section data-background="22-10-2018-weekshop-images/1486151228.svg" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="#https://openclipart.org/detail/271912/internet-things">Eggib</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/1486151228.svg" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
<p>
Other services: e-mail, telephone, chat (IRC, IM),
file sharing,...
</p>
</section>
</section>
<section>
<section>
<h3>Understanding your thread model:</h3>
<p>
I use encryption (HTTPS, ...) my ISP cannot see my traffic!
Maybe it cannot see your traffic (in cleartext), *but*
it tracks:
</p>
<ul>
<li>Websites visited</li>
<li>Locations logs</li>
<li>IP address logs</li>
<li>..archived for x time: Data retention</li>
</ul>
</section>
<section>
VPN / Proxy Providers
<img class="plain" data-src="22-10-2018-weekshop-images/1hop-proxy.png">
<!-- Some commercial proxy providers -->
</section>
<section>
VPN / Proxy Providers: (often) single point of failure
<img class="plain" data-src="22-10-2018-weekshop-images/1hop-fail.png">
<!-- Some commercial proxy providers -->
</section>
<section>
VPN / Proxy Providers: (often) single point of bypass
<img class="plain" data-src="22-10-2018-weekshop-images/1hop-bypass.png">
<!-- Timing analysis bridges all connections through
relay ⇒ An attractive fat target -->
</section>
<section data-background="22-10-2018-weekshop-images/Powered_Purple.svg" data-background-size="50vh">
</section>
<section data-background="22-10-2018-weekshop-images/Powered_Purple.svg" style="background-color:rgba(0,0,0,0.8);" data-background-size="50vh">
<h3>Anonymity: different interests for different user groups</h3>
</section>
<section>
<h3>Anonymity: different interests for different user groups</h3>
<img style="background:orange;" class="plain" data-src="22-10-2018-weekshop-images/anon-citizens.png">
</section>
<section>
<h3>Anonymity: different interests for different user groups</h3>
<img style="background:orange;" class="plain" data-src="22-10-2018-weekshop-images/anon-business.png">
</section>
<section>
<h3>Anonymity: different interests for different user groups</h3>
<img style="background:orange;"class="plain" data-src="22-10-2018-weekshop-images/anon-gov.png">
</section>
<section>
<h3>Anonymity: different interests for different user groups</h3>
<img style="background:orange;"class="plain" data-src="22-10-2018-weekshop-images/anon-activists.png">
</section>
</section>
<section>
<section data-background="22-10-2018-weekshop-images/Onion_Color.svg" data-background-size="50vh">
</section>
<section data-background="22-10-2018-weekshop-images/Onion_Color.svg" style="background-color:rgba(0,0,0,0.8);" data-background-size="50vh">
<h2>How Tor works<h2>
</section>
<section data-background="22-10-2018-weekshop-images/como-funciona-o-tor.svg" data-background-color="#ffffff" data-background-size="50vh">
<span class="attribution"><small><small>Source: <a href="https://people.torproject.org/~karsten/tor-brochure/tor-brochure-pt-BR.pdf">Tor brochure</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/htw1.svg" data-background-color="#ffffff" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://svn.torproject.org/svn/website/trunk/images/htw1.svg">Tor website</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/htw2.svg" data-background-color="#ffffff" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://svn.torproject.org/svn/website/trunk/images/htw2.svg">Tor website</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/htw3.svg" data-background-color="#ffffff" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://svn.torproject.org/svn/website/trunk/images/htw3.svg">Tor website</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/bandwidth-2009-07-24-2018-10-22.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://metrics.torproject.org/bandwidth.html?start=2009-07-24&end=2018-10-22">Tor metrics</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/bandwidth-flags-2009-07-24-2018-10-22.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://metrics.torproject.org/bandwidth-flags.html?start=2009-07-24&end=2018-10-22">Tor metrics</a></small></small></span>
</section>
<section>
<p>Tor's safety comes from diversity</p>
<ul>
<li>Diversity of relays</li>
<li>Diversity of users</li>
</ul>
</section>
<section>
<p>Transparency for Tor is key</p>
<ul>
<li>FL/OSS</li>
<li>Public design documents and specifications</li>
</ul>
</section>
<section>
<p>But what about the bad people?</p>
<ul>
<li>(remember) the millions of daily users</li>
<li>Still a two-edged sword?</li>
<li>Good people need Tor much more than bad people need it</li>
</ul>
</section>
<section>
<p>Onion services</p>
<ul>
<li>Self authenticated</li>
<li>End-to-end encrypted</li>
<li>Built-in NAT punching</li>
<li>Limit surface area</li>
<li>No need to “exit” from Tor</li>
</section>
<section data-background="22-10-2018-weekshop-images/hidserv-rend-relayed-cells-2010-08-19-2018-10-22.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://metrics.torproject.org/hidserv-rend-relayed-cells.png?start=2010-08-19&end=2018-10-22">Tor metrics</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/3percent-onions.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/3percent-onions.png" style="background-color:rgba(0,0,0,0.8);" data-background-size="100vh">
<ul>
<li>About 3% of Tor's traffic has to do with onion
services at all</li>
<li>Onion services are still in the "neat toy" stage</li>
<li>Terbium labs (and others) found ~7000 useful onion sites</li>
</ul>
</section>
<section data-background="22-10-2018-weekshop-images/deepweb-iceberg.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/facebook-onion.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/other-onion-services.png" data-background-size="100vh" data-background-color="#808080">
</section>
<section data-background="22-10-2018-weekshop-images/securedrop.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://en.wikipedia.org/wiki/File:Screenshot_from_SecureDrop_Source_view.png">ParkerHiggins</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/ricochet.png" data-background-size="100vh">
</section>
<section data-background="22-10-2018-weekshop-images/onionshare-server.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://github.com/micahflee/onionshare/blob/master/screenshots/server.png">OnionShare git repository</a></small></small></span>
</section>
<section data-background="22-10-2018-weekshop-images/onionshare-client.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://github.com/micahflee/onionshare/blob/master/screenshots/appdata-client.png">OnionShare git repository</a></small></small></span>
</section>
<section>
<h2>How can you help Tor?</h2>
<ul>
<li>Run a relay (or a bridge)</li>
<li>Teach your friends about Tor, and privacy in general</li>
<li>Help fix -- and fix -- bugs</li>
<li>Work on open research problems (petsymposium.org)</li>
</ul>
</section>
<section>
Protect your privacy
<img class="plain" src="22-10-2018-weekshop-images/Browser_Horizontal_Color.svg"/>
<small>
<a href="https://www.torproject.org/download/download-easy.html">https://www.torproject.org/download/download-easy.html/</a>
<small>
</section>
</section>
</div>
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