From 7efbec3362f9244667615f6351d22966be3079cb Mon Sep 17 00:00:00 2001 From: Patrick Hornecker Date: Thu, 4 Mar 2010 18:29:08 +0100 Subject: präsentation --- praesentation/Makefile | 9 + praesentation/Presentation.aux | 61 ++ praesentation/Presentation.log | 1162 +++++++++++++++++++++++++++++++ praesentation/Presentation.nav | 42 ++ praesentation/Presentation.out | 0 praesentation/Presentation.snm | 0 praesentation/Presentation.tex | 407 +++++++++++ praesentation/Presentation.tex.backup | 424 +++++++++++ praesentation/Presentation.tex~ | 407 +++++++++++ praesentation/Presentation.toc | 2 + "praesentation/Pr\303\244sentation.pdf" | Bin 0 -> 319683 bytes praesentation/bilder/ablauf.png | Bin 0 -> 54689 bytes praesentation/bilder/barcode.png | Bin 0 -> 12110 bytes praesentation/bilder/google.png | Bin 0 -> 104124 bytes praesentation/bilder/graph.png | Bin 0 -> 7843 bytes praesentation/bilder/graph2.png | Bin 0 -> 8643 bytes 16 files changed, 2514 insertions(+) create mode 100644 praesentation/Makefile create mode 100644 praesentation/Presentation.aux create mode 100644 praesentation/Presentation.log create mode 100644 praesentation/Presentation.nav create mode 100644 praesentation/Presentation.out create mode 100644 praesentation/Presentation.snm create mode 100644 praesentation/Presentation.tex create mode 100644 praesentation/Presentation.tex.backup create mode 100644 praesentation/Presentation.tex~ create mode 100644 praesentation/Presentation.toc create mode 100644 "praesentation/Pr\303\244sentation.pdf" create mode 100644 praesentation/bilder/ablauf.png create mode 100644 praesentation/bilder/barcode.png create mode 100644 praesentation/bilder/google.png create mode 100644 praesentation/bilder/graph.png create mode 100644 praesentation/bilder/graph2.png (limited to 'praesentation') diff --git a/praesentation/Makefile b/praesentation/Makefile new file mode 100644 index 0000000..99341dd --- /dev/null +++ b/praesentation/Makefile @@ -0,0 +1,9 @@ +all: clean + pdflatex Presentation + pdflatex Presentation + +clean: + rm -vf *.aux *.log *.bbl *.blg *.out *.dvi *.toc + +distclean: clean + rm -vf *.pdf diff --git a/praesentation/Presentation.aux b/praesentation/Presentation.aux new file mode 100644 index 0000000..47d5334 --- /dev/null +++ b/praesentation/Presentation.aux @@ -0,0 +1,61 @@ +\relax +\ifx\hyper@anchor\@undefined +\global \let \oldcontentsline\contentsline +\gdef \contentsline#1#2#3#4{\oldcontentsline{#1}{#2}{#3}} +\global \let \oldnewlabel\newlabel +\gdef \newlabel#1#2{\newlabelxx{#1}#2} +\gdef \newlabelxx#1#2#3#4#5#6{\oldnewlabel{#1}{{#2}{#3}}} +\AtEndDocument{\let \contentsline\oldcontentsline +\let \newlabel\oldnewlabel} +\else +\global \let \hyper@last\relax +\fi + +\catcode`"\active +\@writefile{toc}{\beamer@endinputifotherversion {3.07pt}} +\@writefile{nav}{\beamer@endinputifotherversion {3.07pt}} +\select@language{ngerman} +\@writefile{toc}{\select@language{ngerman}} +\@writefile{lof}{\select@language{ngerman}} 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Tabellenumgebung +\usepackage{array} + +%pdf-Seiten einbinden +\usepackage{pdfpages} + +\usepackage{multimedia} +\usepackage{multicol} +\usepackage[absolute,overlay]{textpos} + +\usepackage{url} +%=================================================================== +\begin{document} + + +\title{Mobiler Friend Finder} +\author{Patrick Hornecker} +\institute{Universität Freiburg} +\date{\today} + +%-------------------------------------------------------------- +\begin{frame} + \titlepage +\end{frame} +%-------------------------------------------------------------- +%1 +\begin{frame} + \frametitle{Überblick} + + \begin{itemize} + \item \textit{Location privacy} + \vspace{0.2cm} + + \item Aktuelle Entwicklungen + \vspace{0.2cm} + + \item Ziele + \vspace{0.2cm} + + \item Genutzte Verfahren + \vspace{0.2cm} + + \item Analyse + \vspace{0.2cm} + + \item Demonstartion von \textit{Friend Finder} + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%3 +\begin{frame} + \frametitle{\textit{Location privacy}} + \begin{itemize} + \item Definition von \textit{location privacy} durch Duckham und Kulik (2006) \begin{quote}``... a +special type of information privacy which concerns the claim of individuals to determine for themselves when, +how, and to what extent location information about them is communicated to others.''\end{quote} + % \vspace{0.2cm} + \item Bei Verbreitung der Positionsdaten sollte durch den Anwender bestimmbar sein: + \vspace{0.2cm} + + \begin{itemize} + \item Zu welchem Zeitpunkt die Daten versendet werden + \vspace{0.2cm} + + \item Wie die Positionsdaten versendet werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten versendet werden + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%4 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + \begin{itemize} + \item \textit{Google Latitude} + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der eigenen Positionen + \vspace{0.2cm} + + \item Freunde können diese auf einer Karte sehen + \vspace{0.2cm} + + \end{itemize} + \vspace{0.2cm} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.40\textwidth]{bilder/google} + \end{figure} + \tiny{Quelle: http://www.google.com/latitude} + \end{center} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%5 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + + \begin{itemize} + \item Anwender kann den Zeitpunkt wählen, zu dem er die Positionsdaten versenden möchte + \vspace{0.2cm} + + \item Anbieter nutzt ein unbekanntes System um die Daten zu versenden + \vspace{0.2cm} + + \item Benutzer hat keine Einsicht in dieses System und kann somit Art der Verbreitung nicht kontrollieren + \vspace{0.2cm} + + \item Auch der Umfang der Verbreitung kann vom Benutzer nicht überblickt werden, da ihm die Einsicht in das +System des Anbieters fehlt + \vspace{0.2cm} + + \item Es ergibt sich somit eine Informationsasymmetrie zwischen Anwender und Anbieter + \vspace{0.2cm} + + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Ziel ist ein Dienst mit welchem Anwender ihre Positionsdaten versenden können + \vspace{0.2cm} + + \item Dabei soll der Nutzer bestimmen können + \vspace{0.2cm} + + \begin{itemize} + \item Wann seine Daten versendet werden + \vspace{0.2cm} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Wann die Daten versendet werden + \vspace{0.2cm} + + \begin{itemize} + \item Der Nutzer soll den Zeitpunkt frei wählen können, wenn er seine Daten versenden möchte + \vspace{0.2cm} + + \item Eine Sitzung soll ohne Vorplanung zu erstellen sein + \vspace{0.2cm} + + \end{itemize} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der Daten durch transparente und verlässliche Struktur + \vspace{0.2cm} + + \end{itemize} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \vspace{0.2cm} + + \begin{itemize} + \item Anwender kann bestimmen wer seine Positionsdaten einsehen darf + \vspace{0.2cm} + + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%7 +\begin{frame} + \frametitle{Genutzte Verfahren} + + \begin{itemize} + \item \textit{IRC}-Protokoll um Daten zu versenden + \vspace{0.2cm} + + \begin{itemize} + \item \textit{IRC} bietet ein offenes Netzwerk welches frei genutzt werden kann + \vspace{0.2cm} + + \end{itemize} + + \item Symmetrisches Verfahren um Daten zu verschlüsseln + \vspace{0.2cm} + + + \item 2D-Barcode um Schlüssel zu verteilen + \vspace{0.2cm} + + \begin{itemize} + \item 2D-Barcode kann aus Schlüssel erstellt werden + \vspace{0.2cm} + + \item Andere Nutzer können diesen sofort in eine Zeichenkette umwandeln + \vspace{0.2cm} + + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{\textit{Friend Finder}} + + \begin{itemize} + \item Implementierte Software im Rahmen der Abschlussarbeit nennt sich \textit{Friend Finder} + \vspace{0.2cm} + + \item Ist in der Lage Positionen und Textnachrichten im Bezug auf \textit{location privacy} zu versenden + \vspace{0.2cm} + + \item 2D-Barcodes können aus Zeichenketten generiert werden + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Erstellen von 2D-Barcodes} + \begin{itemize} + \item In \textit{Friend Finder} können Barcodes aus Zeichenketten, die der Anwender eingibt, erstellt werden + \vspace{0.2cm} + + \item 2D-Barcodes könnten auch aus bereits generierten Schlüsseln erstellt werden + \end{itemize} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.35\textwidth]{bilder/barcode} + \end{figure} + \tiny{Quelle: \textit{Friend Finder}} + + \end{center} +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden und Empfangen von Daten} + \begin{center} + \includegraphics[scale=0.39]{bilder/ablauf} + \end{center} +\end{frame} +%-------------------------------------------------------------- +%13 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse} + \begin{itemize} + \item \textit{Datenoverhead} von \textit{Friend Finder} + \vspace{0.2cm} + + \item \textit{Friend Finder} im Vergleich zu $n$ einzelnen Verbindungen + \vspace{0.2cm} + + \item Revidiert \textit{Datenoverhead} den Vorteil eines \textit{IRC-Channels} als \textit{Broadcast}-Medium? + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{itemize} + \item \textit{Datenoverhead} in \textit{Friend Finder} besteht aus Hintergrunddaten, welche nichts mit dem +eigentlichen Dienst zu tun haben + \vspace{0.2cm} + + \item Alle 30 Sekunden werden zwischen Server und Client \textit{Keep-Alive} Nachrichten ausgetauscht + \vspace{0.2cm} + + \item Alle 60 Sekunden erhält der Client, auf Nachfrage, Informationen über aktive Benutzer eines +\textit{Channels} + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph2} + \end{center} + +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Textnachrichten} + + \begin{itemize} + \item Beispielsatz ``Hello World'' wird in zwei Teile aufgeteilt + \vspace{0.2cm} + + \item Länge der Textnachricht in unverschlüsseltem Format: 24 Byte + \vspace{0.2cm} + + \item Textnachricht wird im Anschluss verschlüsselt sowie \textit{Base64} kodiert + \vspace{0.2cm} + + \item Das \textit{IRC}-Protokoll fügt noch Informationen bezüglich \textit{Channel} und Benutzer hinzu + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung und Hinzufügen der Informationen hat werden insgesammt 99 +Byte versendet + \vspace{0.2cm} + + \item Somit nimmt die Größe der Daten um Faktor vier zu + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Positionen} + + \begin{itemize} + \item Die größe eines \textit{Latitude/Longtitude} Paares beträgt unverschlüsselt 32 Byte + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung sowie hinzufügen von Zusatzinformationen beträgt die Größe +im Mittel 140 Byte + \vspace{0.2cm} + + \item Vergrößerung des Datenvolumens um circa Faktor vier + \vspace{0.2cm} + + \item Im Anschluss werden vier \textit{Acknowledgements} mit Gesamtgröße 120 Byte versandt + \vspace{0.2cm} + + \item Datenverkehr pro Versendeter Position: $((h + (t \cdot 4)) + (4 \cdot a))\cdot n$ + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden von Positionen} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph} + \end{center} +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{Fazit} + + \begin{itemize} + \item \textit{IRC}-Protokoll gut geeignet für solche Dienste + \vspace{0.2cm} + + \begin{itemize} + \item Wenig \textit{Datenoverhead} + \vspace{0.2cm} + + \item Eignet sich sehr gut als \textit{Broadcast}-Medium + \vspace{0.2cm} + + \end{itemize} + \item Mit Hilfe von 2D-Barcodes können Schlüssel einfach und ohne Vorarbeit weitergegeben werden + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\end{document} diff --git a/praesentation/Presentation.tex.backup b/praesentation/Presentation.tex.backup new file mode 100644 index 0000000..d180542 --- /dev/null +++ b/praesentation/Presentation.tex.backup @@ -0,0 +1,424 @@ +\documentclass{beamer} + +\usetheme{boxes} +%\usecolortheme{wolverine} +%Empfohlene Einstellungen f�r deutschprachige Texte (aus dem RRZN LaTeX Handbuch) +\usepackage[T1]{fontenc} % interne Zeichenkodierung von 7 Bit auf 8 Bit umschalten) +\usepackage[utf8]{inputenc} % Zeichensatz latin ist auf dem mei�ten Systemen kompatibel +\usepackage[ngerman]{babel} % Absatzformatierung, etc. f�r Neue Deutsche Rechtschreibung + +%Graphiken einbinden +\usepackage{graphicx} + +%\usepackage{pifont} +%\usepackage{bbding} +%\usepackage{dingbat} + +%\usepackage{xcolor} + +%Verbesserte Tabellenumgebung +\usepackage{array} + +%pdf-Seiten einbinden +\usepackage{pdfpages} + +\usepackage{multimedia} +\usepackage{multicol} +\usepackage[absolute,overlay]{textpos} + +\usepackage{url} +%=================================================================== +\begin{document} + + +\title{Mobiler Friend Finder} +\author{Patrick Hornecker} +\institute{Universität Freiburg} +\date{\today} + +%-------------------------------------------------------------- +\begin{frame} + \titlepage +\end{frame} +%-------------------------------------------------------------- +%1 +\begin{frame} + \frametitle{Überblick} + + \begin{itemize} + \item \textit{Location privacy} + \vspace{0.2cm} + + \item Aktuelle Entwicklungen + \vspace{0.2cm} + + \item Ziele + \vspace{0.2cm} + + \item Genutzte Verfahren + \vspace{0.2cm} + + \item Analyse + \vspace{0.2cm} + + \item Demonstartion von \textit{Friend Finder} + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%3 +\begin{frame} + \frametitle{\textit{Location privacy}} + \begin{itemize} + \item Definition von \textit{location privacy} durch Duckham und Kulik (2006) \begin{quote}``... a +special type of information privacy which concerns the claim of individuals to determine for themselves when, +how, and to what extent location information about them is communicated to others.''\end{quote} + % \vspace{0.2cm} + \item Bei Verbreitung der Positionsdaten sollte durch den Anwender bestimmbar sein: + \vspace{0.2cm} + + \begin{itemize} + \item Zu welchem Zeitpunkt die Daten versendet werden + \vspace{0.2cm} + + \item Wie die Positionsdaten versendet werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten versendet werden + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%4 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + \begin{itemize} + \item \textit{Google Latitude} + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der eigenen Positionen + \vspace{0.2cm} + + \item Freunde können diese auf einer Karte sehen + \vspace{0.2cm} + + \end{itemize} + \vspace{0.2cm} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.40\textwidth]{bilder/google} + \end{figure} + \tiny{Quelle: http://www.google.com/latitude} + \end{center} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%5 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + + \begin{itemize} + \item Anwender kann den Zeitpunkt wählen, zu dem er die Positionsdaten versenden möchte + \vspace{0.2cm} + + \item Anbieter nutzt ein unbekanntes System um die Daten zu versenden + \vspace{0.2cm} + + \item Benutzer hat keine Einsicht in dieses System und kann somit Art der Verbreitung nicht kontrollieren + \vspace{0.2cm} + + \item Auch der Umfang der Verbreitung kann vom Benutzer nicht überblickt werden, da ihm die Einsicht in das +System des Anbieters fehlt + \vspace{0.2cm} + + \item Es ergibt sich somit eine Informationsasymmetrie zwischen Anwender und Anbieter + \vspace{0.2cm} + + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Ziel ist ein Dienst mit welchem Anwender ihre Positionsdaten versenden können + \vspace{0.2cm} + + \item Dabei soll der Nutzer bestimmen können + \vspace{0.2cm} + + \begin{itemize} + \item Wann seine Daten versendet werden + \vspace{0.2cm} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Wann die Daten versendet werden + \vspace{0.2cm} + + \begin{itemize} + \item Der Nutzer soll den Zeitpunkt frei wählen können, wenn er seine Daten versenden möchte + \vspace{0.2cm} + + \item Eine Sitzung soll ohne Vorplanung zu erstellen sein + \vspace{0.2cm} + + \end{itemize} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der Daten durch transparente und verlässliche Struktur + \vspace{0.2cm} + + \end{itemize} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \vspace{0.2cm} + + \begin{itemize} + \item Anwender kann bestimmen wer seine Positionsdaten einsehen darf + \vspace{0.2cm} + + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%7 +\begin{frame} + \frametitle{Genutzte Verfahren} + + \begin{itemize} + \item \textit{IRC}-Protokoll um Daten zu versenden + \vspace{0.2cm} + + \begin{itemize} + \item \textit{IRC} bietet ein offenes Netzwerk welches frei genutzt werden kann + \vspace{0.2cm} + + \end{itemize} + + \item Symmetrisches Verfahren um Daten zu verschlüsseln + \vspace{0.2cm} + + + \item 2D-Barcode um Schlüssel zu verteilen + \vspace{0.2cm} + + \begin{itemize} + \item 2D-Barcode kann aus Schlüssel erstellt werden + \vspace{0.2cm} + + \item Andere Nutzer können diesen sofort in eine Zeichenkette umwandeln + \vspace{0.2cm} + + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{\textit{Friend Finder} + + \begin{itemize} + \item \textit{IRC}-Protokoll um Daten zu versenden + \vspace{0.2cm} + + \begin{itemize} + \item \textit{IRC} bietet ein offenes Netzwerk welches frei genutzt werden kann + \vspace{0.2cm} + + \end{itemize} + + \item Symmetrisches Verfahren um Daten zu verschlüsseln + \vspace{0.2cm} + + + \item 2D-Barcode um Schlüssel zu verteilen + \vspace{0.2cm} + + \begin{itemize} + \item 2D-Barcode kann aus Schlüssel erstellt werden + \vspace{0.2cm} + + \item Andere Nutzer können diesen sofort in eine Zeichenkette umwandeln + \vspace{0.2cm} + + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Erstellen von 2D-Barcodes} + \begin{itemize} + \item In \textit{Friend Finder} können Barcodes aus Zeichenketten, die der Anwender eingibt, erstellt werden + \vspace{0.2cm} + + \item 2D-Barcodes könnten auch aus bereits generierten Schlüsseln erstellt werden + \end{itemize} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.35\textwidth]{bilder/barcode} + \end{figure} + \tiny{Quelle: \textit{Friend Finder}} + + \end{center} +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden und Empfangen von Daten} + \begin{center} + \includegraphics[scale=0.39]{bilder/ablauf} + \end{center} +\end{frame} +%-------------------------------------------------------------- +%13 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse} + \begin{itemize} + \item \textit{Datenoverhead} von \textit{Friend Finder} + \vspace{0.2cm} + + \item \textit{Friend Finder} im Vergleich zu $n$ einzelnen Verbindungen + \vspace{0.2cm} + + \item Revidiert \textit{Datenoverhead} den Vorteil eines \textit{IRC-Channels} als \textit{Broadcast}-Medium? + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{itemize} + \item \textit{Datenoverhead} in \textit{Friend Finder} besteht aus Hintergrunddaten, welche nichts mit dem +eigentlichen Dienst zu tun haben + \vspace{0.2cm} + + \item Alle 30 Sekunden werden zwischen Server und Client \textit{Keep-Alive} Nachrichten ausgetauscht + \vspace{0.2cm} + + \item Alle 60 Sekunden erhält der Client, auf Nachfrage, Informationen über aktive Benutzer eines +\textit{Channels} + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph2} + \end{center} + +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Textnachrichten} + + \begin{itemize} + \item Beispielsatz ``Hello World'' wird in zwei Teile aufgeteilt + \vspace{0.2cm} + + \item Länge der Textnachricht in unverschlüsseltem Format: 24 Byte + \vspace{0.2cm} + + \item Textnachricht wird im Anschluss verschlüsselt sowie \textit{Base64} kodiert + \vspace{0.2cm} + + \item Das \textit{IRC}-Protokoll fügt noch Informationen bezüglich \textit{Channel} und Benutzer hinzu + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung und Hinzufügen der Informationen hat werden insgesammt 99 +Byte versendet + \vspace{0.2cm} + + \item Somit nimmt die Größe der Daten um Faktor vier zu + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Positionen} + + \begin{itemize} + \item Die größe eines \textit{Latitude/Longtitude} Paares beträgt unverschlüsselt 32 Byte + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung sowie hinzufügen von Zusatzinformationen beträgt die Größe +im Mittel 140 Byte + \vspace{0.2cm} + + \item Vergrößerung des Datenvolumens um circa Faktor vier + \vspace{0.2cm} + + \item Im Anschluss werden vier \textit{Acknowledgements} mit Gesamtgröße 120 Byte versandt + \vspace{0.2cm} + + \item Datenverkehr pro Versendeter Position: $((h + (t \cdot 4)) + (4 \cdot a))\cdot n$ + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden von Positionen} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph} + \end{center} +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{Fazit} + + \begin{itemize} + \item \textit{IRC}-Protokoll gut geeignet für solche Dienste + \vspace{0.2cm} + + \begin{itemize} + \item Wenig \textit{Datenoverhead} + \vspace{0.2cm} + + \item Eignet sich sehr gut als \textit{Broadcast}-Medium + \vspace{0.2cm} + + \end{itemize} + \item Mit Hilfe von 2D-Barcodes können Schlüssel einfach und ohne Vorarbeit weitergegeben werden + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\end{document} diff --git a/praesentation/Presentation.tex~ b/praesentation/Presentation.tex~ new file mode 100644 index 0000000..ca1fe66 --- /dev/null +++ b/praesentation/Presentation.tex~ @@ -0,0 +1,407 @@ +\documentclass{beamer} + +\usetheme{boxes} +%\usecolortheme{wolverine} +%Empfohlene Einstellungen f�r deutschprachige Texte (aus dem RRZN LaTeX Handbuch) +\usepackage[T1]{fontenc} % interne Zeichenkodierung von 7 Bit auf 8 Bit umschalten) +\usepackage[utf8]{inputenc} % Zeichensatz latin ist auf dem mei�ten Systemen kompatibel +\usepackage[ngerman]{babel} % Absatzformatierung, etc. f�r Neue Deutsche Rechtschreibung + +%Graphiken einbinden +\usepackage{graphicx} + +%\usepackage{pifont} +%\usepackage{bbding} +%\usepackage{dingbat} + +%\usepackage{xcolor} + +%Verbesserte Tabellenumgebung +\usepackage{array} + +%pdf-Seiten einbinden +\usepackage{pdfpages} + +\usepackage{multimedia} +\usepackage{multicol} +\usepackage[absolute,overlay]{textpos} + +\usepackage{url} +%=================================================================== +\begin{document} + + +\title{Mobiler Friend Finder} +\author{Patrick Hornecker} +\institute{Universität Freiburg} +\date{\today} + +%-------------------------------------------------------------- +\begin{frame} + \titlepage +\end{frame} +%-------------------------------------------------------------- +%1 +\begin{frame} + \frametitle{Überblick} + + \begin{itemize} + \item \textit{Location privacy} + \vspace{0.2cm} + + \item Aktuelle Entwicklungen + \vspace{0.2cm} + + \item Ziele + \vspace{0.2cm} + + \item Genutzte Verfahren + \vspace{0.2cm} + + \item Analyse + \vspace{0.2cm} + + \item Demonstartion von \textit{Friend Finder} + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%3 +\begin{frame} + \frametitle{\textit{Location privacy}} + \begin{itemize} + \item Definition von \textit{location privacy} durch Duckham und Kulik (2006) \begin{quote}``... a +special type of information privacy which concerns the claim of individuals to determine for themselves when, +how, and to what extent location information about them is communicated to others.''\end{quote} + % \vspace{0.2cm} + \item Bei Verbreitung der Positionsdaten sollte durch den Anwender bestimmbar sein: + \vspace{0.2cm} + + \begin{itemize} + \item Zu welchem Zeitpunkt die Daten versendet werden + \vspace{0.2cm} + + \item Wie die Positionsdaten versendet werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten versendet werden + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%4 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + \begin{itemize} + \item \textit{Google Latitude} + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der eigenen Positionen + \vspace{0.2cm} + + \item Freunde können diese auf einer Karte sehen + \vspace{0.2cm} + + \end{itemize} + \vspace{0.2cm} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.40\textwidth]{bilder/google} + \end{figure} + \tiny{Quelle: http://www.google.com/latitude} + \end{center} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%5 +\begin{frame} + \frametitle{Aktuelle Entwicklungen} + + \begin{itemize} + \item Anwender kann den Zeitpunkt wählen, zu dem er die Positionsdaten versenden möchte + \vspace{0.2cm} + + \item Anbieter nutzt ein unbekanntes System um die Daten zu versenden + \vspace{0.2cm} + + \item Benutzer hat keine Einsicht in dieses System und kann somit Art der Verbreitung nicht kontrollieren + \vspace{0.2cm} + + \item Auch der Umfang der Verbreitung kann vom Benutzer nicht überblickt werden, da ihm die Einsicht in das +System des Anbieters fehlt + \vspace{0.2cm} + + \item Es ergibt sich somit eine Informationsasymmetrie zwischen Anwender und Anbieter + \vspace{0.2cm} + + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Ziel ist ein Dienst mit welchem Anwender ihre Positionsdaten versenden können + \vspace{0.2cm} + + \item Dabei soll der Nutzer bestimmen können + \vspace{0.2cm} + + \begin{itemize} + \item Wann seine Daten versendet werden + \vspace{0.2cm} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%6 +\begin{frame} + \frametitle{Ziele} + + \begin{itemize} + \item Wann die Daten versendet werden + \vspace{0.2cm} + + \begin{itemize} + \item Der Nutzer soll den Zeitpunkt frei wählen können, wenn er seine Daten versenden möchte + \vspace{0.2cm} + + \item Eine Sitzung soll ohne Vorplanung zu erstellen sein + \vspace{0.2cm} + + \end{itemize} + + \item Auf welche Art die Daten versandt werden + \vspace{0.2cm} + + \begin{itemize} + \item Versenden der Daten durch transparente und verlässliche Struktur + \vspace{0.2cm} + + \end{itemize} + + \item In welchem Umfang die Positionsdaten weitergegeben werden + \vspace{0.2cm} + + \begin{itemize} + \item Anwender kann bestimmen wer seine Positionsdaten einsehen darf + \vspace{0.2cm} + + \end{itemize} + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%7 +\begin{frame} + \frametitle{Genutzte Verfahren} + + \begin{itemize} + \item \textit{IRC}-Protokoll um Daten zu versenden + \vspace{0.2cm} + + \begin{itemize} + \item \textit{IRC} bietet ein offenes Netzwerk welches frei genutzt werden kann + \vspace{0.2cm} + + \end{itemize} + + \item Symmetrisches Verfahren um Daten zu verschlüsseln + \vspace{0.2cm} + + + \item 2D-Barcode um Schlüssel zu verteilen + \vspace{0.2cm} + + \begin{itemize} + \item 2D-Barcode kann aus Schlüssel erstellt werden + \vspace{0.2cm} + + \item Andere Nutzer können diesen sofort in eine Zeichenkette umwandeln + \vspace{0.2cm} + + \end{itemize} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{\textit{Friend Finder}} + + \begin{itemize} + \item Implementierte Software im Rahmen der Abschlussarbeit nennt sich \textit{Friend Finder} + \vspace{0.2cm} + + \item Ist in der Lage Positionen und Textnachrichten zu versenden + \vspace{0.2cm} + + \item 2D-Barcodes können aus Zeichenketten generiert werden + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Erstellen von 2D-Barcodes} + \begin{itemize} + \item In \textit{Friend Finder} können Barcodes aus Zeichenketten, die der Anwender eingibt, erstellt werden + \vspace{0.2cm} + + \item 2D-Barcodes könnten auch aus bereits generierten Schlüsseln erstellt werden + \end{itemize} + + \begin{center} + \begin{figure}[p] + \includegraphics[width=0.35\textwidth]{bilder/barcode} + \end{figure} + \tiny{Quelle: \textit{Friend Finder}} + + \end{center} +\end{frame} +%-------------------------------------------------------------- +%12 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden und Empfangen von Daten} + \begin{center} + \includegraphics[scale=0.39]{bilder/ablauf} + \end{center} +\end{frame} +%-------------------------------------------------------------- +%13 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse} + \begin{itemize} + \item \textit{Datenoverhead} von \textit{Friend Finder} + \vspace{0.2cm} + + \item \textit{Friend Finder} im Vergleich zu $n$ einzelnen Verbindungen + \vspace{0.2cm} + + \item Revidiert \textit{Datenoverhead} den Vorteil eines \textit{IRC-Channels} als \textit{Broadcast}-Medium? + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{itemize} + \item \textit{Datenoverhead} in \textit{Friend Finder} besteht aus Hintergrunddaten, welche nichts mit dem +eigentlichen Dienst zu tun haben + \vspace{0.2cm} + + \item Alle 30 Sekunden werden zwischen Server und Client \textit{Keep-Alive} Nachrichten ausgetauscht + \vspace{0.2cm} + + \item Alle 60 Sekunden erhält der Client, auf Nachfrage, Informationen über aktive Benutzer eines +\textit{Channels} + \vspace{0.2cm} + + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +%14 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Allgemeiner Datenverkehr} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph2} + \end{center} + +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Textnachrichten} + + \begin{itemize} + \item Beispielsatz ``Hello World'' wird in zwei Teile aufgeteilt + \vspace{0.2cm} + + \item Länge der Textnachricht in unverschlüsseltem Format: 24 Byte + \vspace{0.2cm} + + \item Textnachricht wird im Anschluss verschlüsselt sowie \textit{Base64} kodiert + \vspace{0.2cm} + + \item Das \textit{IRC}-Protokoll fügt noch Informationen bezüglich \textit{Channel} und Benutzer hinzu + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung und Hinzufügen der Informationen hat werden insgesammt 99 +Byte versendet + \vspace{0.2cm} + + \item Somit nimmt die Größe der Daten um Faktor vier zu + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Analyse: Versenden von Positionen} + + \begin{itemize} + \item Die größe eines \textit{Latitude/Longtitude} Paares beträgt unverschlüsselt 32 Byte + \vspace{0.2cm} + + \item Nach Verschlüsselung, \textit{Base64}-Kodierung sowie hinzufügen von Zusatzinformationen beträgt die Größe +im Mittel 140 Byte + \vspace{0.2cm} + + \item Vergrößerung des Datenvolumens um circa Faktor vier + \vspace{0.2cm} + + \item Im Anschluss werden vier \textit{Acknowledgements} mit Gesamtgröße 120 Byte versandt + \vspace{0.2cm} + + \item Datenverkehr pro Versendeter Position: $((h + (t \cdot 4)) + (4 \cdot a))\cdot n$ + \end{itemize} +\end{frame} +%-------------------------------------------------------------- +%15 +\begin{frame} + \frametitle{\textit{Friend Finder} - Versenden von Positionen} + + \begin{center} + \includegraphics[scale=0.39]{bilder/graph} + \end{center} +\end{frame} +%-------------------------------------------------------------- +\begin{frame} + \frametitle{Fazit} + + \begin{itemize} + \item \textit{IRC}-Protokoll gut geeignet für solche Dienste + \vspace{0.2cm} + + \begin{itemize} + \item Wenig \textit{Datenoverhead} + \vspace{0.2cm} + + \item Eignet sich sehr gut als \textit{Broadcast}-Medium + \vspace{0.2cm} + + \end{itemize} + \item Mit Hilfe von 2D-Barcodes können Schlüssel einfach und ohne Vorarbeit weitergegeben werden + \end{itemize} + +\end{frame} +%-------------------------------------------------------------- +\end{document} diff --git 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