commit 58f693480d6e526c81ba79008dc228cd46ba61d6
parent 195417840aada878aa249f4db2fa3e17ed71bf7d
Author: Christian Grothoff <christian@grothoff.org>
Date: Sun, 11 Sep 2022 11:43:38 +0200
han slides
Diffstat:
3 files changed, 333 insertions(+), 4 deletions(-)
diff --git a/presentations/comprehensive/han.tex b/presentations/comprehensive/han.tex
@@ -0,0 +1,329 @@
+\pdfminorversion=3
+\documentclass[fleqn,xcolor={usenames,dvipsnames}]{beamer}
+\usepackage{amsmath}
+\usepackage{multimedia}
+\usepackage[utf8]{inputenc}
+\usepackage{framed,color,ragged2e}
+\usepackage[absolute,overlay]{textpos}
+\definecolor{shadecolor}{rgb}{0.8,0.8,0.8}
+\usetheme{boxes}
+\setbeamertemplate{navigation symbols}{}
+\usepackage{xcolor}
+\usepackage{tikz,eurosym}
+\usepackage[normalem]{ulem}
+\usepackage{listings}
+\usepackage{adjustbox}
+
+% CSS
+\lstdefinelanguage{CSS}{
+ basicstyle=\ttfamily\scriptsize,
+ keywords={color,background-image:,margin,padding,font,weight,display,position,top,left,right,bottom,list,style,border,size,white,space,min,width, transition:, transform:, transition-property, transition-duration, transition-timing-function},
+ sensitive=true,
+ morecomment=[l]{//},
+ morecomment=[s]{/*}{*/},
+ morestring=[b]',
+ morestring=[b]",
+ alsoletter={:},
+ alsodigit={-}
+}
+
+% JavaScript
+\lstdefinelanguage{JavaScript}{
+ basicstyle=\ttfamily\scriptsize,
+ morekeywords={typeof, new, true, false, catch, function, return, null, catch, switch, var, if, in, while, do, else, case, break},
+ morecomment=[s]{/*}{*/},
+ morecomment=[l]//,
+ morestring=[b]",
+ morestring=[b]'
+}
+
+\lstdefinelanguage{HTML5}{
+ basicstyle=\ttfamily\scriptsize,
+ language=html,
+ sensitive=true,
+ alsoletter={<>=-},
+ morecomment=[s]{<!-}{-->},
+ tag=[s],
+ otherkeywords={
+ % General
+ >,
+ % Standard tags
+ <!DOCTYPE,
+ </html, <html, <head, <title, </title, <style, </style, <link, </head, <meta, />,
+ % body
+ </body, <body,
+ % Divs
+ </div, <div, </div>,
+ % Paragraphs
+ </p, <p, </p>,
+ % scripts
+ </script, <script,
+ % More tags...
+ <canvas, /canvas>, <svg, <rect, <animateTransform, </rect>, </svg>, <video, <source, <iframe, </iframe>, </video>, <image, </image>
+ },
+ ndkeywords={
+ % General
+ =,
+ % HTML attributes
+ charset=, src=, id=, width=, height=, style=, type=, rel=, href=,
+ % SVG attributes
+ fill=, attributeName=, begin=, dur=, from=, to=, poster=, controls=, x=, y=, repeatCount=, xlink:href=,
+ % CSS properties
+ margin:, padding:, background-image:, border:, top:, left:, position:, width:, height:,
+ % CSS3 properties
+ transform:, -moz-transform:, -webkit-transform:,
+ animation:, -webkit-animation:,
+ transition:, transition-duration:, transition-property:, transition-timing-function:,
+ }
+}
+
+\lstdefinelanguage{JavaScript}{
+ basicstyle=\ttfamily\scriptsize,
+ keywords={typeof, new, true, false, catch, function, return, null, catch, switch, var, if, in, while, do, else, case, break, for},
+ keywordstyle=\color{blue}\bfseries,
+ ndkeywords={class, export, boolean, throw, implements, import, this},
+ ndkeywordstyle=\color{darkgray}\bfseries,
+ identifierstyle=\color{black},
+ sensitive=false,
+ comment=[l]{//},
+ morecomment=[s]{/*}{*/},
+ commentstyle=\color{purple}\ttfamily,
+ stringstyle=\color{red}\ttfamily,
+ morestring=[b]',
+ morestring=[b]"
+}
+
+\usetikzlibrary{shapes,arrows}
+\usetikzlibrary{positioning}
+\usetikzlibrary{calc}
+
+\title{GNU Taler}
+%\subtitle{}
+
+\setbeamertemplate{navigation symbols}{\includegraphics[width=1cm]{inria.pdf} \includegraphics[width=2.3cm]{bfh.png} \includegraphics[width=1.6cm]{fub.pdf} \includegraphics[width=0.4cm]{ashoka.png} \includegraphics[width=0.4cm]{gnu.png} \includegraphics[width=1cm]{logo-2020.jpg} \hfill}
+%\setbeamercovered{transparent=1}
+
+\author[C. Grothoff]{J. Burdges, F. Dold, {\bf C. Grothoff}, M. Stanisci}
+\date{\today}
+\institute{The GNU Project}
+
+
+\begin{document}
+
+\justifying
+
+\begin{frame}
+ \begin{center}
+ \LARGE {\bf GNU}
+
+ \vfill
+% \includegraphics[width=0.66\textwidth]{logo-2017-fr.pdf}
+ \includegraphics[width=0.66\textwidth]{taler-logo-2021-inkscape.pdf}
+ \end{center}
+\begin{textblock*}{6cm}(.5cm,7.7cm) % {block width} (coords)
+ {\Large {\bf \href{https://taler.net/}{taler.net}} \\
+ \href{https://twitter.com/taler}{taler@twitter} \\
+ \href{https://taler-systems.com/}{taler-systems.com}}
+\end{textblock*}
+
+% Substitute based on who is giving the talk!
+ \begin{textblock*}{6cm}(6.7cm,7.7cm) % {block width} (coords)
+ {\hfill {\Large {\bf Florian Dold \&} \\
+ \hfill {\bf Christian Grothoff}} \\
+ \hfill \{dold,grothoff\}@taler.net }
+\end{textblock*}
+
+\end{frame}
+
+
+\begin{frame}{GNU Taler}
+ \vfill
+ \begin{center}
+ {\huge {\bf Digital} cash, made \textbf{socially responsible}.}
+ \end{center}
+ \vfill
+ \begin{center}
+ \includegraphics[scale=0.3]{taler-logo-2021-inkscape.pdf}
+ \end{center}
+ \vfill
+ \begin{center}
+ Privacy-Preserving, Practical, Taxable, Free Software, Efficient
+ \end{center}
+ \vfill
+ \vfill
+\ %
+\end{frame}
+
+
+\section{What is Taler?}
+\begin{frame}{What is Taler?}
+ \begin{center}
+Taler is an electronic instant payment system.
+ \end{center}
+ \begin{itemize}
+ \item Uses electronic coins stored in {\bf wallets} on customer's device
+ \item Like {\bf cash}
+ \item Pay in {\bf existing currencies} (i.e. EUR, USD, BTC), \\
+ or use it to create new {\bf regional currencies}
+ \end{itemize}
+ \vfill
+ \pause
+ \noindent
+ However, Taler is
+ \begin{itemize}
+ \item \emph{not} a currency
+ \item \emph{not} a long-term store of value
+ \item \emph{not} a network or instance of a system
+ \item \emph{not} decentralized
+ \item \emph{not} based on proof-of-work or proof-of-stake
+ \item \emph{not} a speculative asset / ``get-rich-quick scheme''
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{Design principles}
+ \framesubtitle{https://taler.net/en/principles.html}
+GNU Taler must ...
+\begin{enumerate}
+ \item {... be implemented as {\bf free software}.}
+ \item {... protect the {\bf privacy of buyers}.}
+ \item {... must enable the state to {\bf tax income} and crack down on
+ illegal business activities.}
+ \item {... prevent payment fraud.}
+ \item {... only {\bf disclose the minimal amount of information
+ necessary}.}
+ \item {... be usable.}
+ \item {... be efficient.}
+ \item {... avoid single points of failure.}
+ \item {... foster {\bf competition}.}
+\end{enumerate}
+\end{frame}
+
+
+\begin{frame}{Social Impact of Taler}
+ \begin{center}
+ \includegraphics[height=0.9\textheight]{../../social-impact.pdf}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}
+\frametitle{Taler Overview}
+\begin{center}
+ \includegraphics[width=1\textwidth]{operations.png}
+\end{center}
+\end{frame}
+
+
+\begin{frame}[c]{Example: The Taler Snack Machine\footnote{by M. Boss and D. Hofer}}
+ \framesubtitle{Integration of a MDB/ICP to Taler gateway.\\Implementation of a NFC or QR-Code to Taler wallet interface.}
+ \vfill
+ \begin{figure}
+ \centering
+ \includegraphics[width=1.0\textwidth]{design}
+ \end{figure}
+\end{frame}
+
+
+\begin{frame}[c]{User story: Install App on Android}
+\framesubtitle{\url{https://wallet.taler.net/}}
+ \begin{figure}
+ \includegraphics[width=0.9\textwidth]{download_wallet.png}
+ \end{figure}
+\end{frame}
+
+\begin{frame}{User story: Withdraw e-cash}
+ \begin{figure}
+ \includegraphics[width=0.9\textwidth]{get_taler_coins.png}
+ \end{figure}
+\end{frame}
+
+\begin{frame}{User story: Use machine!}
+ \begin{figure}
+ \includegraphics[width=0.9\textwidth]{get_snacks.png}
+ \end{figure}
+\end{frame}
+
+
+\begin{frame}{Usability of Taler}
+ \vfill
+ \begin{center}
+ \url{https://demo.taler.net/}
+ \end{center}
+ \begin{enumerate}
+ \item Install browser extension.
+ \item Visit the {\tt bank.demo.taler.net} to withdraw coins.
+ \item Visit the {\tt shop.demo.taler.net} to spend coins.
+ \end{enumerate}
+ \vfill
+\end{frame}
+
+
+\begin{frame}{Known Design Challenges}
+\begin{itemize}
+ \item How to make the wallets more accessible? (Say to blind users?)
+ \item Android QR-scan button was not identified by a user. What to do?
+ \item How can get users to understand self-custody and its implications?
+ \item How can we best explain the fee structure?
+ \item How can we systematically ensure error messages are understandable?
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{How to support?}
+ \begin{description}
+ \item[Join:] {\small \url{https://lists.gnu.org/mailman/listinfo/taler}}, \\
+ \url{https://libera.chat/\#taler}
+ \item[Develop:] \url{https://bugs.taler.net/}, \url{https://git.taler.net/}
+ \item[Translate:] \url{https://weblate.taler.net/}, \url{translation-volunteer@taler.net}
+ \item[Integrate:] \url{https://docs.taler.net/}
+ \item[Donate:] \url{https://gnunet.org/ev}
+ \item[Invest:] \url{https://taler-systems.com/}
+ \end{description}
+ \begin{center}
+ {\bf The team is eager to work with design students for projects or theses!}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}{Conclusion}
+\begin{itemize}
+ \item Replacing authentication with authorization improves usability
+ \item Privacy and security do not have to hurt usability
+ \item Self-custody requires good solutions to existing challenges
+\end{itemize}
+\end{frame}
+
+
+\begin{frame}
+\frametitle{Do you have any questions?}
+\vfill
+References:
+{\tiny
+ \begin{enumerate}
+ \item{David Chaum, Christian Grothoff and Thomas Moser.
+ {\em How to issue a central bank digital currency}.
+ {\bf SNB Working Papers, 2021}.}
+ \item{Christian Grothoff, Bart Polot and Carlo von Loesch.
+ {\em The Internet is broken: Idealistic Ideas for Building a GNU Network}.
+ {\bf W3C/IAB Workshop on Strengthening the Internet Against Pervasive Monitoring (STRINT)}, 2014.}
+ \item{Jeffrey Burdges, Florian Dold, Christian Grothoff and Marcello Stanisci.
+ {\em Enabling Secure Web Payments with GNU Taler}.
+ {\bf SPACE 2016}.}
+ \item{Florian Dold, Sree Harsha Totakura, Benedikt M\"uller, Jeffrey Burdges and Christian Grothoff.
+ {\em Taler: Taxable Anonymous Libre Electronic Reserves}.
+ Available upon request. 2016.}
+ \item{Eli Ben-Sasson, Alessandro Chiesa, Christina Garman, Matthew Green, Ian Miers, Eran Tromer and Madars Virza.
+ {\em Zerocash: Decentralized Anonymous Payments from Bitcoin}.
+ {\bf IEEE Symposium on Security \& Privacy, 2016}.}
+ \item{David Chaum, Amos Fiat and Moni Naor.
+ {\em Untraceable electronic cash}.
+ {\bf Proceedings on Advances in Cryptology, 1990}.}
+ \item{Phillip Rogaway.
+ {\em The Moral Character of Cryptographic Work}.
+ {\bf Asiacrypt}, 2015.} \label{bib:rogaway}
+\end{enumerate}
+}
+\end{frame}
+
+\end{document}
diff --git a/presentations/comprehensive/main.tex b/presentations/comprehensive/main.tex
@@ -100,7 +100,7 @@
\title{GNU Taler}
%\subtitle{}
-\setbeamertemplate{navigation symbols}{\includegraphics[width=1cm]{inria.pdf} \includegraphics[width=2.3cm]{bfh.png} \includegraphics[width=1.6cm]{fub.pdf} \includegraphics[width=0.4cm]{ashoka.png} \includegraphics[width=0.4cm]{gnu.png} \includegraphics[width=1cm]{logo-2020.jpg} \hfill}
+\setbeamertemplate{navigation symbols}{\includegraphics[width=1cm]{inria.pdf} \includegraphics[width=2.3cm]{bfh.png} \includegraphics[width=1.6cm]{fub.pdf} \includegraphics[width=0.4cm]{ashoka.png} \includegraphics[width=0.4cm]{gnu.png} \includegraphics[width=1cm]{taler-logo-2021-inkscape.pdf} \hfill}
%\setbeamercovered{transparent=1}
\author[C. Grothoff]{J. Burdges, F. Dold, {\bf C. Grothoff}, M. Stanisci}
@@ -118,7 +118,7 @@
\vfill
% \includegraphics[width=0.66\textwidth]{logo-2017-fr.pdf}
- \includegraphics[width=0.66\textwidth]{logo-2020.jpg}
+ \includegraphics[width=0.66\textwidth]{taler-logo-2021-inkscape.pdf}
\end{center}
\begin{textblock*}{6cm}(.5cm,7.7cm) % {block width} (coords)
{\Large {\bf \href{https://taler.net/}{taler.net}} \\
@@ -279,7 +279,7 @@ ZeroCoin, CryptoNote (Monero) and ZeroCash (ZCash) offer anonymity.
\end{center}
\vfill
\begin{center}
- \includegraphics[scale=1]{logo-2020.jpg}
+ \includegraphics[scale=0.3]{taler-logo-2021-inkscape.pdf}
\end{center}
\vfill
\begin{center}
@@ -1571,7 +1571,7 @@ Central banks should also consider funding research to improve:
\begin{frame}{How to support?}
\begin{description}
\item[Join:] {\small \url{https://lists.gnu.org/mailman/listinfo/taler}}, \\
- \url{irc://irc.freenode.net/\#taler}
+ \url{https://libera.chat/\#taler}
\item[Develop:] \url{https://bugs.taler.net/}, \url{https://git.taler.net/}
\item[Translate:] \url{https://weblate.taler.net/}, \url{translation-volunteer@taler.net}
\item[Integrate:] \url{https://docs.taler.net/}
diff --git a/presentations/comprehensive/taler-logo-2021-inkscape.pdf b/presentations/comprehensive/taler-logo-2021-inkscape.pdf
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