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<!doctype html>
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<title>
Introduction to LEAP & Pixelated
</title>
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<meta name="author" content="kali kaneko">
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<body>
<div class="reveal">
<div class="slides">
<section>
<section data-markdown>
# Introduction to LEAP & Pixelated
### meskio && zara && varac && kali @Hamburg
### 33c3 - Dec 2016
</section>
<section data-markdown>
### Pixelated hands-on: 28th 1100 HALL C4
### Platform hands-on: 28th 1700 HALL C2
</section>
<section>
<img src="images/intersection.png">
</section>
<section>
<img src="images/jump.png">
</section>
<section data-markdown>
## here to provide
easy-to-use software for end-to-end encrypted communication between individual users
</section>
<section>
<video autoplay="false" width="800" controls="controls" loop src="video/fbi.mp4"></video>
</section>
<section>
<img src="images/lavabit.png">
</section>
<section>
<img src="images/bitmask2.png">
<br/>
<img src="images/bitmask-logo.svg" width=30% height=30%>
</section>
<section data-markdown>
## decentralization & privacy
will NOT be magically achieved!
* must be built from below and regained
* federation is at stake (even if it means less traction or control!)
* services have costs
* "demand" is a two-way game
</section>
<section>
<img src="images/crimson.jpg" alt="the crimson permanent insurance">
</section>
<section>
<img src="images/monster.jpg" alt="a monster with many eyes - complexity creeps in any project">
</section>
</section>
<section>
<section>
<video autoplay="false" width="800" controls="controls" loop src="video/gpgforjournalists.mp4"></video>
</section>
<section>
<img src="images/pizarra.jpg">
</section>
<section>
<video autoplay="false" width="800" controls="controls" loop src="video/my-first-email.avi"></video>
</section>
<section data-markdown>
## why [greenwald] can't encrypt? (since 2005!)
* encryption difficult to use
* encryption difficult to provide
* security and privacy not possible without usability
* security and privacy not possible without usability
* security and privacy not possible without usability
* was that point already clear?
* do not overwhelm or scare the user
* provide sensible defaults
* convenience trade-offs: fail close!
</section>
<section>
<img src="images/pgp.png">
</section>
<section>
<img src="images/serrapelada.jpg">
</section>
<section data-markdown>
## "WE WANT CRYPTO
## BUT ROSES TOO"
</section>
<section data-markdown>
## break down the problem
1. server-side infrastructure
2. usable client software
3. protocols for sync
</section>
<section>
<img src="images/holygrail.jpg">
</section>
<section data-markdown>
## what $user sees
* VPN client
* Application proxies
* Key management
</section>
<section data-markdown>
## native apps, really?
* user can do...
* ...if incentives aligned
* first tunnel, then mail thru secure channel.
* opportunistic mail encryption
* eip: encrypted internet proxy (VPN)
* cross-device synchronization
* VPN helps to fight commoditization! (provider can monetize)
</section>
</section>
<section>
<section>
<img src="images/cryptorally.png">
</section>
<section data-markdown>
# interoperability is a must
### many projects converging for massive adoption of crypto
## Keep tuned for AUTOCRYPT: Enigmail, K9, Mailpile, Pixelated, Bitmask
</section>
</section>
<section>
<section data-markdown>
## LEAP platform
### A toolkit to make it easy for you to run a federated service provider.
</section>
<section data-markdown>
* Configuration Management using puppet
* Installs and configures the servers
* leap_cli is the tool to deploy to the servers
* Provider confiduration is stored on admin laptop
</section>
<section>
<h2>LEAP Platform Example: Setup single node email provider</h2>
<pre><code class="hljs" data-trim contenteditable>
sudo gem install leap_cli
leap new example --domain example.org
cd example
leap add-user --self
leap cert ca
leap cert csr
leap node add raspberry \
services:couchdb,webapp,soledad,mx ip_address:1.1.1.3
leap init node
leap deploy
</code></pre>
</section>
<section data-markdown>
## LEAP Platform: Install and configure the server/s
* Email: Postfix, spamassassin, clamav
* Database: couchdb, stunnel
* Webserver: apache
* Encrypting remailer: leap-mx
* Synchronisation: soledad
* Account management, issue tracking: leap-webapp
* Firewall: shorewall
* Monitoring: nagios, check_mk
</section>
<section data-markdown>
## Server-side techstack
* PLatform: Puppet
* leap_cli: ruby
* leap_web: Ruby on Rails
* leap_mx, soledad: Python Twisted
</section>
<section data-markdown>
## Other LEAP components
* SOLEDAD
* Bonafide (registration, auth, pass change...)
* Current Services: VPN, Encrypted Email
</section>
<section data-markdown>
## LEAP Webapp
* API for user authentication
* Help Tickets
* User Management
* Payment processing
* Customisable
</section>
<section>
<img src="https://rawgit.com/leapcode/leap_presentations/master/rgsoc2016_leap_overview/images/leap-webapp1.png">
</section>
<section>
<img src="https://rawgit.com/leapcode/leap_presentations/master/rgsoc2016_leap_overview/images/leap-webapp2.png">
</section>
<section>
<img src="https://rawgit.com/leapcode/leap_presentations/master/rgsoc2016_leap_overview/images/leap-webapp-tickets.png">
</section>
</section>
<section>
<section data-markdown>
## the client: Bitmask
* basically an encryption proxy
* protocol specific for mail
* linux (deb, bundles), [windows, osx]
* android client
</section>
<section>
<img src="images/bitmask1.png">
</section>
<section data-markdown>
## show me the code!
<a href="https://github.com/leapcode/">https://github.com/leapcode/</a>
* ~30 repos
* GPL code
</section>
</section>
<section>
<section data-markdown>
## threat model
* Active or passive adversary
* Avoid the recovering of Communications Plaintext
* Avoid the recovering of the Social Graph (*)
</section>
<section data-markdown>
## trust model
* do *not* trust the provider too much
* passwords never reach the server in cleartext (srp + encrypted keys)
* TOFU for key and certificate discovery
* encrypted data
* minimize metadata!
</section>
<section data-markdown>
### backwards compatible
* vpn
* OpenPGP
* imap, smtp (clientside proxies)
</section>
<section data-markdown>
## VPN
* prevent eavesdropping.
* circunvent internet censorship.
* firewall: prevent leaks (DNS, IPv6, ...).
* static portable builds, mbed SSL
* targeting home routers too (openwrt port)
* autoconf, reconnect, fail close
* obsproxy integration
</section>
</section>
<section>
<section data-markdown>
## SOLEDAD
* Synchronization of Locally Encrypted Data Among Devices
* auth: srp
* kdf: scrypt
* AES-256-GCM
* built on top of canonical's u1db
* vector clocks
* clientside: sqlcipher backend
* serverside: couchdb cluster (+ distribuded fs?!)
</section>
<section data-markdown>
## Problem: Attachments
* Syncing blobs in a convoluted store
* Pluggable BlobsIO backend for server (in dev)
* FS as MVP, others welcome!
* Follow the "git-annex" model
</section>
</section>
<section>
<section>
<img src="images/schema.jpg">
</section>
<section>
<img src="images/soledad.jpg">
</section>
<section>
<img src="images/mx.jpg">
</section>
<section>
<img src="images/architecture.png">
</section>
</section>
<section>
<section data-markdown>
## TRANSITIONAL KEY VALIDATION
generic rules for automatic key management, transition from TOFU to more advanced ruleset.
* bind key <-> email address
* key directory
* endorser (provider)
* binding info: evidence for "educated guess"
* verified key transition (automatic)
</section>
<section data-markdown>
## keymanager current rules
# TOFU (yes, but*)
### with a bunch of exceptions
</section>
<section data-markdown>
## 1. First Contact
When one or more keys are first discovered for a particular email address, the key with the highest validation level is registered.
</section>
<section>
<h2>2. Regular Refresh</h2>
<p>All keys are regularly refreshed to check for modified expirations, or new subkeys, or new keys signed by old keys.</p>
<p><small>This refresh SHOULD happen via some anonymizing mechanism.</small></p>
</section>
<section>
<h2>3. Key Replacement</h2>
<p>A registered key MUST be replaced by a new key in one of the following situations, and ONLY these situations:</p>
<ul>
<li class="fragment">Verified key transitions.</li>
<li class="fragment">If the user manually verifies the fingerprint of the new key.</li>
<li class="fragment">If the registered key is expired or revoked and the new key is of equal or higher validation level.</li>
<li class="fragment">If the registered key has never been successfully used and the new key has a higher validation level.</li>
<li class="fragment">If the registered key has no expiration date.</li>
</ul>
<aside class="notes">
verified key transtion == signed by the previously
</aside>
</section>
</section>
<section>
<section data-markdown>
# Validation levels
low == less trust on the source
</section>
<section data-markdown>
## 1. Weak Chain
<sub>ej: sks key servers, email attached key, OpenPGP header, ...</sub>
</section>
<section data-markdown>
## 2. Provider Trust
<sub>ej: webfinger, provider mailvelope</sub>
Note:
* Certified by the provider
* Not auditable
</section>
<section data-markdown>
## 3. Provider Endorsement
<sub>ej: NickNym</sub>
Note:
* auditable
</section>
<section data-markdown>
## 4. Historical Auditing
<sub>ej: CONIKS, google's transparent keyserver</sub>
</section>
<section data-markdown>
## 5. Known Key
<sub>client pinned keys</sub>
</section>
<section data-markdown>
## 6. Fingerprint
<sub>manual verification</sub>
</section>
</section>
<section>
<section data-markdown>
## users wants a webmail?
</section>
<section data-markdown>
## give them a webmail
## (kudos to pixelated!)
</section>
<section>
<img src="images/pixelated-user-agent.png">
</section>
<section>
<img src="images/pix.png">
</section>
</section>
<section>
<section data-markdown>
## developments ahead
* Torbirdy integration
* NEXTLEAP/PANORAMIX
* AUTOCRYPT! (in-band opportunistic key encryption)
* MEMORYHOLE (protecting most mail headers while in transit)
* mix networks
</section>
</section>
<section>
<section>
<h2>thanks! questions?</h1>
<img src="images/contact-QR.png" alt="QR with info contact for kali & leap">
<h3>BE23 FB4A 0E9D B36E CB9A B8BE 2363 8BF7 2C59 3BC1</h2>
</section>
</section>
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