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cifra-te-ou-devoram-session03.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>Introduction to Secure Communications</title>
<meta name="description" content="Introduction to Secure Communications">
<meta name="author" content="Vasilis Ververis">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<link rel="stylesheet" href="css/reveal.css">
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<link rel="stylesheet" href="css/custom.css">
</head>
<body>
<div class="reveal">
<div class="slides">
<section data-background="cifra-te-ou-devoram-images-session00/cifrate.png"
data-background-size="100vh">
</section>
<section data-background="cifra-te-ou-devoram-images-session00/cifrate.png"
data-background-size="100vh"
style="background-color:rgba(0,0,0,0.6);">
Cifra-te ou Devoram-te <br>
0xCFD0 <br>
# 01010110010101011 <br>
Introduction to Secure Communications
</section>
<section data-background="cifra-te-ou-devoram-images-session03/SE-227_mit_SVZ-B_IMG_1400.JPG" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://commons.wikimedia.org/wiki/File:SE-227_mit_SVZ-B_IMG_1400.JPG">Bunkerfunkeror (CC-BY-SA-3.0)</a></small></small></span>
</section>
<section>
<h3>Basics</h3>
<ul>
<li>Advertisements & Surveillance = ♥</li>
<li>Centralization ate the cat :(</li>
<li>We can get killed based on metadata</li>
<li>Data acquisition is toxic</li>
<ul>
<li> https://informationisbeautiful.net/visualizations/worlds-biggest-data-breaches-hacks/ </li>
</ul>
</ul>
</section>
<section>
<video class="stretch">
<source data-src="videos/kill-people-based-on-metadata.webm" type="video/webm"/>
</video>
<span style="font-size: 23pt; float: right; text-align: left;">
Michael Hayden<br/>
former director of CIA and NSA
</span>
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/7">Briar 34c4</a></small></small></span>
</section>
<section>
<h3>Overview of (some) communication protocols/systems</h3>
<ul>
<li>Instant messaging</li>
<li>Voice over IP</li>
<li>Email</li>
<li>IRC</li>
</ul>
</section>
<section>
Instant messaging
</section>
<section data-background="cifra-te-ou-devoram-images-session03/end-to-end-encryption-comparison.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://heimdalsecurity.com/blog/the-best-encrypted-messaging-apps/">Heimdal Security</a></small></small></span>
</section>
<section data-background="cifra-te-ou-devoram-images-session03/diagram_insecure.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://briarproject.org/how-it-works.html">Briar website</a></small></small></span>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/diagram_insecure.png" data-background-size="100vh" style="background-color:rgba(0,0,0,0.6);">
<ul>
<li>Centralized servers</li>
<li>Expose messages, contants, relationships,...</li>
<li>Censorship, content filtering, information controls</li>
<li>Prone to attacks: DoS, MiTM,...</li>
</ul>
</section>
<section>
<img data-src="cifra-te-ou-devoram-images-session03/logo-google-allo.png" width="300" height="300"/>
<div class="spread">
<img data-src="cifra-te-ou-devoram-images-session03/logo-telegram.svg" width="300" height="300"/>
<img data-src="cifra-te-ou-devoram-images-session03/logo-facebook-messenger.svg" width="300" height="300"/>
</div>
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/7">Briar 34c3</a></small></small></span>
</section>
<section>
<ul>
<li>No End to End Encryption (/by default)</li>
<li>Home-grown crypto protocols</li>
<li>Insecure defaults</li>
</ul>
<div class="spread">
<img data-src="cifra-te-ou-devoram-images-session03/logo-google-allo.png" width="200" height="200"/>
<img data-src="cifra-te-ou-devoram-images-session03/logo-telegram.svg" width="200" height="200"/>
<img data-src="cifra-te-ou-devoram-images-session03/logo-facebook-messenger.svg" width="200" height="200"/>
</div>
</section>
<section>
<div class="spread">
<img data-src="cifra-te-ou-devoram-images-session03/logo-whatsapp.svg" width="200" height="200"/>
<img data-src="cifra-te-ou-devoram-images-session03/logo-signal.png" width="200" height="200"/>
</div>
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/9">Briar 34c4</a></small></small></span>
</section>
<section>
<ul>
<li>Phone numbers as identifiers centrally stored → Juicy Target</li>
<li>Timing Attacks</li>
<li>Logs, other metadata...</li>
</ul>
<div class="spread">
<img data-src="cifra-te-ou-devoram-images-session03/logo-whatsapp.svg" width="150" height="150"/>
<img data-src="cifra-te-ou-devoram-images-session03/logo-signal.png" width="150" height="150"/>
</div>
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/9">Briar 34c4</a></small></small></span>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/logo-briar.svg" data-background-size="contain">
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/2">Briar 34c4</a></small></small></span>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/diagram_secure.png" data-background-size="100vh">
<span class="attribution"><small><small>Source: <a href="https://briarproject.org/how-it-works.html">Briar website</a></small></small></span>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/diagram_secure.png" data-background-size="100vh" style="background-color:rgba(0,0,0,0.6);">
<ul>
<li>No central server required</li>
<li>No phone numbers</li>
<li>Connectivity: Bluetooth, LAN, Tor</li>
</ul>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/graph-tor.svg" data-background-size="contain">
<span class="attribution"><small><small>Source: <a href="https://grobox.de/presentations/2017-12-30_Briar_at_34c3.html#/30">Briar 34c4</a></small></small></span>
</section>
<section data-background-image="cifra-te-ou-devoram-images-session03/graph-tor.svg" data-background-size="100vh" style="background-color:rgba(0,0,0,0.6);">
<ul>
<li>Connection between peers consists of 6 Tor relays (3 picked by each peer)</li>
<li>Hides metadata even from network observers</li>
</ul>
</section>
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
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</html>