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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Security in the Internet of Things</title>
<meta name="description" content="IoT Security">
<meta name="author" content="Jeffrey I. Schiller">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="css/reveal.min.css">
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</head>
<body>
<div class="reveal">
<div class="slides">
<section>
<h1>Security in the Internet of Things</h1>
<h3>Yes, You need to worry *now*</h3>
<p><small>Created by <a href="http://jis.qyv.name" target="_blank">Jeffrey I. Schiller</a><br/>
February 22, 2014</small></p>
</section>
<section>
<h2>Introduction</h2>
<ul>
<li>No One ever wants to do Security</li>
<li>Its a “Negative Deliverable”</li>
<li>You don’t know when you have it, only when you have lost it.</li>
<li>Its a cost, generates no revenue</li>
<li>What me worry, no one is attacking!</li>
</ul>
</section>
<section>
<h2>Security from the Beginning</h2>
<ul>
<li>If you ignore security you make design decisions that make adding it later hard.</li>
<li>I have seen this time and time again.
<ul>
<li>Email, Voice of IP</li>
</ul>
</li>
<li>“Bad Guys” only show up after significant deployment</li>
</ul>
</section>
<section>
<h2>Understand Your Threats</h2>
<ul>
<li>What is your “Threat Model”</li>
<li>What do the bad guys want to do</li>
<li>There are some things that everyone wants to do with an Internet connected device
<ul>
<li>Botnets anyone!</li>
</ul>
</li>
<li>Beyond that it is application specific</li>
<li>Beware the Hacktivist</li>
</ul>
</section>
<section>
<h2>Things have a Hard Time</h2>
<ul>
<li>They are not computers</li>
<li>People don’t think of them as computers</li>
<li>Will they get patches or updates?
<ul>
<li>Probably not...</li>
</ul>
</li>
<li>Need to securely Update Them</li>
<li>You won’t have access, but your adversaries will!</li>
<li>Most devices will be behind a NAT</li>
<li>One that you cannot penetrate but the bad guys can</li>
</ul>
</section>
<section>
<h2>What to do</h2>
<ul>
<li>You will need Internet/Security experts</li>
<li>And I don’t mean someone who took the 2 week course</li>
<li>Plan on updating firmware</li>
<li>Software should be in mostly read-only memory</li>
<li>Except for updating</li>
<li>Android is a good model to look at</li>
<li>You will need a good source of entropy</li>
</section>
<section>
<h2>Software Update</h2>
<ul>
<li>Device has to poll</li>
<li>Need to Authenticate New Update</li>
<li>Solution: Digitally Sign Update</li>
<li>Problem: Protecting the Private Signing Key</li>
</ul>
</section>
<section>
<h2>Protecting the Key: FAIL</h2>
<ul>
<li>Most Software is stored in a VC Repository (Git, Mercurial...)</li>
<li>Typically there is an automated or CI build server</li>
<li>To get Signed Binaries, you need the private key</li>
<li>So too many organizations put the signing key in the Repository</li>
<li>“Three can keep a secret if two of them are dead!”<br/><blockquote> –Benjamin Franklin</blockquote></li>
<li>Keys in Repositories *always* leak
<ul>
<li>Holy GitHub Batman!</li>
</ul>
</li>
<li>Production Staff often are not security savy</li>
</ul>
</section>
<section>
<h2>Neat Trick from Bitcoin</h2>
<ul>
<li>Don’t embed public key in software</li>
<li>Embed the hash (or two) of the public key</li>
<li>Distribute the Public Key with the next signed update</li>
<li>Update the Hashed Key to a new one when updating</li>
<li>Attacker has to first reverse a hash before attacking the Public Key System</li>
</ul>
</section>
<section>
<p><font size="+14"><b>Questions?</b></font></p>
</section>
</div>
</div>
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