commit b86b4c60924e9d3f0b3c871cfcaf3264ef4eb185
parent 9b59ec86189bd35df592c6893139a0472a4c19e4
Author: Christian Grothoff <grothoff@gnunet.org>
Date: Wed, 30 Aug 2023 19:56:01 +0200
sab
Diffstat:
2 files changed, 609 insertions(+), 2 deletions(-)
diff --git a/presentations/comprehensive/lug.tex b/presentations/comprehensive/lug.tex
@@ -284,8 +284,8 @@ Taler is
\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 combinable with a DLT back-end if requested
+ \item \emph{not} based on proof-of-work or proof-of-stake
+% \item combinable with a DLT back-end if requested
\end{itemize}
\end{frame}
diff --git a/presentations/comprehensive/sab.tex b/presentations/comprehensive/sab.tex
@@ -0,0 +1,607 @@
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+\newcommand\Forall{%
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+
+
+\title{GNU Taler}
+%\subtitle{}
+
+\setbeamertemplate{navigation symbols}{\includegraphics[width=1cm]{inria.pdf} \includegraphics[width=1cm]{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, {\bf F. Dold, C. Grothoff, M. Stanisci}}
+\date{\today}
+\institute{Taler Systems SA \& The GNU Project}
+
+
+\begin{document}
+
+\justifying
+
+\begin{frame}
+ \begin{center}
+ \LARGE {\bf GNU} \\
+ \vspace{0.3cm}
+% \includegraphics[width=0.66\textwidth]{logo-2017-fr.pdf}
+ \includegraphics[width=0.66\textwidth]{taler-logo-2021-inkscape.pdf}
+ \vfill
+ \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*}{8cm}(4.5cm,7.7cm) % {block width} (coords)
+ {
+ \hfill {\bf Dr. Christian Grothoff} \\
+ \hfill grothoff@taler.net }
+\end{textblock*}
+
+\end{frame}
+
+\begin{frame}{Who am I?}
+ \begin{itemize}
+ \item Prof. of Computer Science at Bern Univ. of Applied Sciences
+ \item Ashoka fellow (elected 2014)
+ \item GNU maintainer (since 2001) and advisory council member
+ \item Co-founder and CEO of Taler Systems SA (since 2015)
+ \end{itemize}
+ \noindent
+ {\bf Career milestones:}
+ \begin{itemize}
+ \item[2000] Graduated in mathematics ($\equiv$ masters)
+ \item[2001] Started research in network privacy
+ \item[2006] Earned PhD in computer science in 2006 from UCLA
+ \item[2013] Started GNU Taler project in 2013 at INRIA
+ \item[2018] Contacted by European Central Bank about Digital Euro
+ \item[2021] Authored ``How to design a CBDC'' with Swiss National Bank
+ \end{itemize}
+\end{frame}
+
+
+\section{What is Taler?}
+\begin{frame}{What is Taler?}
+ \framesubtitle{\url{https://taler.net/es/features.html}} \noindent
+Taler is
+ \vfill
+ \begin{itemize}
+ \item a Free/Libre software \emph{payment system} infrastructure project
+ \item ... with a surrounding software ecosystem
+ \item ... and a company (Taler Systems S.A.) and community that wants to deploy it
+ as widely as possible.
+ \end{itemize}
+ \vfill
+\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 combinable with a DLT back-end if requested
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{Design principles}
+ \framesubtitle{https://taler.net/es/principles.html}
+GNU Taler must ...
+\begin{enumerate}
+ \item {... be implemented as {\bf free software} (but {\em available} under a commercial license).}
+ \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} in associated services.}
+\end{enumerate}
+\end{frame}
+
+
+\begin{frame}{Architecture of Taler}
+\begin{center}
+ \includegraphics[width=1\textwidth]{operations.png}
+\end{center}
+\end{frame}
+
+
+\begin{frame}{Consumer Impact of Taler}
+\begin{itemize}
+\item {\bf Convenient:} pay with one click instantly --– in Euro,
+Dollar, Yen or Bitcoin
+\item {\bf Friction-free security:} Payments do not require sign-up,
+login or multi-factor authentication
+\item {\bf Privacy-preserving:} payment requires/shares no personal information
+\item {\bf Bank account:} not required
+\end{itemize}
+\end{frame}
+
+
+\begin{frame}{Merchant Impact of Taler}
+\begin{itemize}
+\item {\bf Instant clearance:} one-click transactions and instant clearance at par
+\item {\bf Easy \& compliant:} GDPR \& PCI-DSS compliance-free and without any effort
+\item {\bf Major profit increase:} efficient protocol $+$ no fraud $=$ extremely low costs
+\item {\bf 1-click checkout:} without Amazon and without false
+positives in fraud detection
+\end{itemize}
+\end{frame}
+
+
+\begin{frame}{Taler: Unique Regulatory Features for Central Banks}
+ \framesubtitle{\url{https://taler.net/papers/cbdc2021es.pdf}}
+ \begin{itemize}
+ \item Central bank issues digital coins equivalent to issuing cash \\
+ $\Rightarrow$ monetary policy remains under CB control
+ \item Architecture with consumer accounts at commercial banks \\
+ $\Rightarrow$ no competition for commercial banking (S\&L) \\
+ $\Rightarrow$ CB does not have to manage KYC, customer support
+ \item Withdrawal limits and denomination expiration \\
+ $\Rightarrow$ protects against bank runs and hoarding
+ \item Income transparency and possibility to set fees \\
+ $\Rightarrow$ additional insights into economy and new policy options
+ \item Revocation protocols and loss limitations \\
+ $\Rightarrow$ exit strategy and handles catastrophic security incidents
+ \item Privacy by cryptographic design not organizational compliance \\
+ $\Rightarrow$ CB cannot be forced to facilitate mass-surveillance
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{The Taler Software Ecosystem: Overview}
+ \framesubtitle{\url{https://taler.net/en/docs.html}}
+ Taler is based on modular components that work together to provide a
+ complete payment system:
+ \vfill
+ \begin{itemize}
+ \item {\bf Exchange:} Service provider for digital cash
+ \begin{itemize}
+ \item Core exchange software (cryptography, database)
+ \item Air-gapped key management, real-time {\bf auditing}
+ \item {\bf LibEuFin}: Modular integration with banking systems
+ \end{itemize}
+ \item {\bf Merchant:} Integration service for existing businesses
+ \begin{itemize}
+ \item Core merchant backend software (cryptography, database)
+ \item {\bf Back-office interface} for staff
+ \item {\bf Frontends} (E-commerce plugins, Point-of-sale App)
+ \end{itemize}
+ \item {\bf Wallet:} Consumer-controlled applications for e-cash
+ \begin{itemize}
+ \item Multi-platform wallet software (for browsers \& mobile phones)
+ \item Wallet backup storage providers ({\bf sync})
+ \item {\bf Anastasis}: Recovery of lost wallets based on secret splitting
+ \end{itemize}
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{Taler Merchant}
+ \begin{center}
+ \includegraphics[width=\textwidth]{screenshots/merchant-spa-settings}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}{Taler Wallet}
+ \begin{center}
+ \includegraphics[width=3cm]{screenshots/Screenshot_20230225-103520.png}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}{Pretix Taler payment plugin}
+\begin{center}
+\includegraphics[width=0.5\textwidth]{screenshots/pretix.png}
+\end{center}
+
+ Pretix is a ticket sales system.
+
+ \begin{itemize}
+ \item Pretix payment plugin enables payments via GNU Taler
+ \item Developed by Pretix.eu for \EUR{3,000} on behalf of Taler Systems SA
+ \end{itemize}
+\end{frame}
+
+
+\begin{frame}{WooCommerce Taler payment plugin}
+\begin{center}
+% \includegraphics[width=6cm]{screenshots/woocommerce-cart.png}
+ \includegraphics[width=\textwidth]{screenshots/woocommerce-settings.png}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}{Point-of-Sale App for Android}
+
+\begin{center}
+\begin{minipage}{4cm}
+ \includegraphics[width=6cm]{screenshots/Screenshot_20230224-194112.jpg}
+ \includegraphics[width=6cm]{screenshots/Screenshot_20230224-194119.jpg}
+\end{minipage}
+\end{center}
+\end{frame}
+
+
+\begin{frame}{Cashier App for Android}
+\begin{center}
+ \begin{minipage}{3cm}
+ \includegraphics[width=3cm]{screenshots/Screenshot_20230225-103315.png}
+ \end{minipage}
+ \begin{minipage}{3cm}
+ \includegraphics[width=3cm]{screenshots/Screenshot_20230225-103325.png}
+ \end{minipage}
+\end{center}
+\end{frame}
+
+
+\begin{frame}{Partially Offline Payments with GNU Taler}
+\begin{center}
+\resizebox{8cm}{7cm}{
+\begin{sequencediagram}
+ \newinst{pos}{\shortstack{PoS \\
+ \\ \begin{tikzpicture}
+ \node [fill=gray!20,draw=black,thick ,align=center] {PoS key \\ PoS ID};
+ \end{tikzpicture}
+ }}
+ \newinst[2]{customer}{\shortstack{Customer \\
+ \\ \begin{tikzpicture}
+ \node [fill=gray!20,draw=black,thick ,align=center] {Digital \\ Wallet};
+ \end{tikzpicture}
+ }}
+ \newinst[2]{backend}{\shortstack{Merchant Backend \\
+ \\ \begin{tikzpicture}[shape aspect=.5]
+ \tikzset{every node/.style={cylinder, shape border rotate=90, draw,fill=gray!25}}
+ \node at (1.5,0) {\shortstack{{\tiny PoS key} \\ {\tiny PoS ID}}};
+ \end{tikzpicture}
+ }}
+ \postlevel
+ \mess[0]{pos}{PoS ID}{customer}
+ \begin{sdblock}{optional}{}
+ \begin{callself}{customer}{Amount}{}
+ \end{callself}
+ \end{sdblock}
+ \prelevel
+ \prelevel
+ \prelevel
+ \prelevel
+ \prelevel
+ \begin{sdblock}{optional}{}
+ \begin{callself}{pos}{Amount}{}
+ \end{callself}
+ \end{sdblock}
+ \postlevel
+ \mess[0]{customer}{PoS ID, [Amount]?}{backend}
+ \mess[0]{backend}{Contract}{customer}
+ \postlevel
+ \mess[0]{customer}{Payment}{backend}
+ \begin{callself}{pos}{OTP(PoS key)}{}
+ \end{callself}
+ \prelevel
+ \prelevel
+ \begin{callself}{backend}{OTP(PoS key)}{}
+ \end{callself}
+ \mess[0]{backend}{OTP code}{customer}
+ \postlevel
+ \mess[0]{customer}{OTP code}{pos}
+\end{sequencediagram}
+}
+\end{center}
+\end{frame}
+
+
+\begin{frame}{More featues}
+ \begin{itemize}
+ \item KYC/AML integration
+ \item Programmable money (recently presented at Fin/SUM 2023 on invitation by Bank of Japan)
+ \item Programmable payments
+ \item Bank integrations
+ \item Payment notifications
+ \item Currency conversion
+ \end{itemize}
+ \begin{center}
+ {\bf ... and everything we do is Libre software}
+ \end{center}
+\end{frame}
+
+
+\begin{frame}{Collaboration with Central Banks}
+\framesubtitle{Discussion Proposal}
+Taler Systems SA can provide:
+\begin{itemize}
+\item Provision sandbox deployments for testing
+\item Integration with additional banking APIs
+\item Commercial support in maintenance \& roll-outs
+\end{itemize}
+\end{frame}
+
+
+\begin{frame}{Do you have any questions?}
+ \framesubtitle{\url{https://taler.net/en/bibliography.html}}
+ \vfill
+References:
+ \begin{enumerate}
+ \item{David Chaum, Christian Grothoff and Thomas Moser.
+ {\em Come una banca centrale dovrebbe emettere una moneta digitale}.
+ {\bf Swiss National Bank Working Papers, 2021}.
+ \url{https://taler.net/papers/cbdc2021es.pdf}}
+{\tiny
+ \item{David Chaum, Christian Grothoff and Thomas Moser.
+ {\em How to issue a central bank digital currency}.
+ {\bf SNB Working Papers, 2021}.}
+ \item{Martin Summer and Hannes Hermanky.
+ {\em A digital euro and the future of cash}.
+ {\bf Monetary Policy \& The Economy Q1-Q2/22}.}
+ \item{Antoine d’Aligny, Emmanuel Benoist, Florian Dold, Christian Grothoff, Özgür Kesim and Martin Schanzenbach.
+ {\em Who comes after us? The correct mindset for designing a Central Bank Digital Currency}.
+ {\bf SUERF Policy Notes 279/2022}.}
+ \item{Florian Dold.
+ {\em GNU Taler}.
+ {\bf University of Rennes 1, PhD Thesis, 2019}.}
+ \item{Christian Grothoff and Alex Pentland.
+ {\em Digital cash and privacy: What are the alternatives to Libra?}.
+ {\bf MIT Media Lab, 2019}.}
+ \item{Jeffrey Burdges, Florian Dold, Christian Grothoff and Marcello Stanisci.
+ {\em Enabling Secure Web Payments with GNU Taler}.
+ {\bf SPACE 2016}.}
+ \item{Özgür Kesim, Christian Grothoff, Florian Dold and Martin Schanzenbach.
+ {\em Zero-Knowledge Age Restriction for GNU Taler}.
+ {\bf ESORICS, 2022}.}
+ \item{Gian Demarmels and Lucien Heuzeveldt.
+ {\em Adding Schnorr's Blind Signature in Taler}.
+ {\bf BFH, Bachelor's Thesis, 2022}.}
+ \item{Marco Boss.
+ {\em GNU Taler Scalability}.
+ {\bf BFH, Bachelor's Thesis, 2022}.}
+}
+\end{enumerate}
+\vfill
+\end{frame}
+
+
+\begin{frame}{Usability of Taler}
+ \vfill
+ \begin{center}
+ \url{https://demo.taler.net/}
+ \end{center}
+ \begin{enumerate}
+ \item Install browser extension (or Android App).
+ \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}{Launch Timeline}
+ \begin{description}
+ \item[2022] Internal deployment at BFH
+ \item[Q4'2023] Deployment of local currency Netzbon in Basel
+ \item[Q1'2024] Public deployment of eCHF stablecoin in Switzerland, cleared by FINMA
+ \item[2025] Digital Euro launches with Taler across Eurozone
+ \end{description}
+\end{frame}
+
+\begin{frame}{Active collaborations}
+{\small
+ \begin{description}
+ \item {\bf Berner Fachhochschule:} \\ Snack machine \& blockchain integration \& scalability
+ \item {\bf Freie Universit\"at Berlin:} \\ Programmability \& embedded systems
+ \item {\bf The GNU Project}: \\ Integration into FLOSS software
+ \item {\bf Fraunhofer Gesellschaft}: \\ Identity management \& SSI \& wallet-to-wallet communication
+ \item {\bf Fiscaltrust GmbH}: \\ Point-of-sale integration
+ \item {\bf Taler Consortium}: \\ Launch GNU Taler in Eurozone and beyond (funded by European Commission)
+ \end{description}
+ }
+\end{frame}
+
+
+
+
+\end{document}
