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+#+TITLE:     Secure Share
+#+AUTHOR:    Daniel Reusche and Gabor Toth
+#+LANGUAGE:  en
+#+OPTIONS:   H:3 num:t toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
+#+OPTIONS:   TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
+#+INFOJS_OPT: view:nil toc:nil ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js
+
+#+startup: oddeven
+
+#+startup: beamer
+#+LaTeX_CLASS: beamer
+#+LaTeX_CLASS_OPTIONS: [bigger]
+##+LaTeX_HEADER: \usetheme{Darmstadt}
+#+LaTeX_HEADER: \usetheme{Frankfurt}
+##+LaTeX_HEADER: \usetheme{Boadilla}
+##+LaTeX_HEADER: \usetheme{Pittsburgh}
+##+LaTeX_HEADER: \setbeamertemplate{navigation symbols}{}
+#+BEAMER_FRAME_LEVEL: 3
+
+* Introduction
+
+** Secure Share
+
+*** Secure Share
+A framework for secure and privacy-protecting social interaction based on
+peer-to-peer technology
+
+#** Federation - Unicast                                            :noexport:
+##+ATTR_LaTeX: width=8cm
+#[[./img/unicast.png]]
+
+*** Goals
+**** arbitrary messanging 
+***** from one-to-one to many-to-many
+***** status updates and messages
+**** file transfer
+***** sharing of pictures, music etc.
+***** collaborative document editing
+** Privacy
+
+*** Privacy
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Privacy}}
+#+END_CENTER
+
+*** Ideal Case
+[[../img/unicast.png]]
+*** Centralized services
+#+BEGIN_CENTER
+#+ATTR_LaTeX: width=8cm
+[[../img/cloud.png]]
+#+END_CENTER
+
+*** Privacy requirements
+**** end-to-end encryption
+**** forward secrecy
+**** padding of packets
+**** delayed forwarding
+**** private contact list
+**** free and open source software
+*** Approach: federated systems
+
+\textbf{\Large{And why not to use them}}
+**** personal data on servers
+**** personal data shared with even more server operators
+**** only link-level encryption
+**** PGP, OTR not enough
+
+** Scalability
+
+*** Scalability
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Scalability}}
+#+END_CENTER
+
+*** Social interaction
+**** one-to-many status updates
+**** many-to-many group communication
+
+*** Multicast
+
+#+BEGIN_CENTER
+#+ATTR_LaTeX: width=7cm
+[[../img/multicast.png]]
+#+END_CENTER
+
+* Architecture
+
+** Architecture
+
+*** Architecture
+
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Architecture}}
+#+END_CENTER
+
+** Peer-to-Peer
+
+*** Friend-to-friend architecture
+**** connect to trusted nodes
+**** prevents active attacks
+
+*** Personal devices
+**** Software runs on personal devices
+**** Data is stored on personal devices
+
+*** Personal devices
+**** laptop, PC
+**** plug computers, home routers, servers
+**** smartphones
+
+*** Peer-to-peer framework requirements
+**** free/libre/open-source software
+**** multi-platform, lightweight, written in a compiled language
+**** provides API for essential P2P features
+***** bootstrapping, addressing, routing, encryption, NAT traversal
+
+*** GNUnet
+**** written in C
+**** multi-platform
+**** modular framework
+**** advanced NAT traversal
+
+*** GNUnet
+**** multiple transport methods
+***** TCP, UDP
+***** HTTP, HTTPS
+***** SMTP
+***** ad-hoc WiFi
+
+*** GNUnet
+**** distributed hash table (DHT)
+**** file sharing
+***** based on DHT and GAP
+**** various routing schemes
+***** fish-eye bounded distance vector protocol
+****** gossiping in a limited neighborhood
+****** improves connectivity
+****** onion routing
+***** mesh service
+****** supports multicast
+****** uses DHT for routing
+
+*** psycd
+
+**** messaging protocol
+**** manages connections, friendship between users
+**** client interface
+
+*** GNUnet - components and message flow
+
+#+BEGIN_CENTER
+#+ATTR_LaTeX: width=9.5cm
+[[./gnunet-h.png]]
+#+END_CENTER
+
+** Implementation
+
+*** Implementation
+
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Implementation}}
+#+END_CENTER
+
+*** Components
+
+**** libpsyc
+
+**** psycd
+
+**** GNUnet libraries
+
+*** Identifiers
+
+**** Federated PSYC
+
+***** based on DNS
+
+: psyc://example.net/~alice#friends
+
+**** P2P PSYC
+
+***** based on public key
+
+: psyc://I0GC...L29G:g/#friends
+
+*** Contacting peers
+
+**** initial contact: hello message
+
+***** public key
+
+***** current addresses
+
+**** next time contact to same address
+
+**** or find new address through other peers
+
+*** Circuits
+
+**** GNUnet
+
+**** TCP
+
+**** UNIX domain sockets
+
+**** TLS
+
+*** Entities
+
+**** person
+***** clients link to person entity
+***** can subscribe other entities
+
+**** place
+***** group communication
+***** news feeds
+
+*** Multicast contexts
+
+[[./context.png]]
+
+*** Distributed state
+
+**** profile data, context membership
+
+**** push changes once
+
+**** synchronize after subscription
+
+**** recover lost packets
+
+**** syntax changes to support more complex data structures
+
+*** Storage
+
+**** incoming and outgoing packets
+
+**** state variables
+
+**** SQLite database
+
+***** multiplatform
+
+***** lightweight
+
+***** small memory footprint
+
+* Clients
+
+** Clients
+
+*** Clients
+
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Clients}}
+#+END_CENTER
+
+*** Desktop clients
+
+**** secushare
+***** based on Qt/QML
+***** multiplatform
+***** touch UI
+
+**** irssyc
+***** based on irssi
+***** intended for debugging and for advanced users
+
+*** Web interface
+
+**** JavaScript
+
+**** WebSocket
+
+*** Mobile clients
+
+**** port GNUnet to mobile devices
+
+**** or client only approach
+
+*** Extensibility
+
+**** channel API
+***** using a sandboxed QML or HTML view
+***** JavaScript API
+***** enables easy app development
+***** access only channel data
+
+**** client API
+***** using libpsycclient
+***** allows for developing full-fledged clients
+
+* Future work
+
+** Future work
+
+*** Future work
+
+#+BEGIN_CENTER
+#+LaTeX: \textbf{\Huge{Future work}}
+#+END_CENTER
+
+*** Future work
+
+**** routing layer - multicast
+
+**** separate user and node identities
+
+**** user interface 
+
+***** improvements on desktop
+
+***** implement web UI
+
+***** implement mobile UI
+
+**** file transfers