lsd0013

donau.tex (5581B)

---

 \documentclass[aspectratio=169,t]{beamer}
 \input taler-macros
 
 \graphicspath{{images/}}
 
 \newcommand{\TITLE}{NEXT \\ GENERATION \\ INTERNET}
 \newcommand{\SUB}{The ``donau'' scheme (draft-grothoff-donau)}
 \newcommand{\AUTHOR}{Christian Grothoff}
 \newcommand{\SPEAKER}{Christian Grothoff}
 \newcommand{\INST}{The GNU Project}
 \newcommand{\DATE}{IETF 125: DISPATCH}
 
 % Do not edit this part
 \title{\TITLE}
 \subtitle{\SUB}
 \date{\DATE}
 \author[\SPEAKER]{\AUTHOR}
 \institute{\INST}
 
 \begin{document}
 
 \begin{frame}[plain]
 \maketitle
 \end{frame}
 
 \begin{frame}{{\tt donau} URI scheme}
 {\url{https://lsd.gnunet.org/lsd0013/}}
 \begin{itemize}
 \item Donations to charities are often tax-deductable
 \item Filing taxes with unstructured paper-receipts is messy
 \item Taxes are often still filed on paper
 \item[$\Rightarrow$] {\tt donau://} as a QR-code compatible
   proof of tax-deductable donations
 \end{itemize}
 \vfill
 The URI contains the amount donated, the corresponding year, the
 tax id number and the donation statement signature.
 \end{frame}
 
 
 \begin{frame}{Validation}
   \center
   \begin{tikzpicture}
     \node (image) at (0,0) {\includegraphics[width=0.1\textwidth]{stickman}};
     \node at (0,-1.8) {Donor};
     %arrow
     \draw [-latex] (1,-0.5) -- (7,-0.5);
     %QR-Code
     \draw (2.7,2.5) -- (3.4,0.9);
     \draw (4.9,2.5) -- (4.2,0.9);
     \node (image) at (3.8,2) {\includegraphics[width=0.05\textwidth]{gold_wax}};
     \node at (3.8,2) {\small{16}};
     \node at (3.8,2.5) {\tiny{7560001010000}};
     \node at (3.8,1.3) {\small{2024}};
     \node (image) at (3.8,0.2) {\includegraphics[width=0.1\textwidth]{qr-donau}};
     %server
     \node (image) at (8.5,0) {
     \includegraphics[width=0.1\textwidth]{stickman}};
     \node at (8.5,-1.8) {Tax Auditor};
   \end{tikzpicture}\vspace{0.4cm}
   \begin{itemize}
   \item The tax auditor is able to view the data and check the
     signature using the provided smartphone app.
   \end{itemize}
 \end{frame}
 %%%---------------------------------------
 
 
 \begin{frame}{Discussions at IETF}
   \begin{itemize}
     \item uri-review: \url{https://mailarchive.ietf.org/arch/msg/uri-review/tSTAIyY9ZRCYmTt4LlYOwpnoIN4/}
       \begin{itemize}
         \item Good inputs from Ted Hardie
         \item All points made were addressed
         \item[$\Rightarrow$] IANA provisional registration exists
       \end{itemize}
     \item Draft includes OCR-friendly Base32-encoding inspired by
       Crockford but allowing {\bf u $\equiv$ {\bf v}} (also used by
       RFC 9498). 
     \item[$\Rightarrow$] Separtion was suggested, if anyone wants this?
   \end{itemize}
 \end{frame}
 
 
 \begin{frame}{Context}
   This is part of a larger protocol effort (\url{https://git-www.taler.net/}):
   \begin{itemize}
   \item Enable {\em anonymous} donations
   \item Ensure only approved charities can sign donation statements
   \item Make total amount of donations received per charity transparent to authorities
   \item Free software for citizens, charities, and tax authorities exists
   \end{itemize}
 %  However, {\tt donau} URI scheme is deliberately independent of the
 %  specific protocol used to obtain the proof of donation.
 
   This is part of an even larger protocol effort:
   \begin{itemize}
   \item Taler protocol enables {\em anonymous} digital cash
   \item Complex protocol with giving change, refunds, age-restrictions, etc.
   \item Already birthed RFC 8905.
   \end{itemize}  
 \end{frame}
 
 \begin{frame}{Options for next steps}
   \begin{itemize}
     \item Leave it at {\tt donau} draft
     \item Send {\tt donau} draft to ISE for informational track (separation of appendix?)
     \item Create payment BOF and charter WG for payment protocols\footnote{Note: No blockchains/DLTs involved here.}
   \end{itemize}
 \ 
   \vfill
   \begin{center}
     GNU Taler\\
     \vspace{0.1em}
     \url{https://taler.net}\\
     \vspace{0.1em}
     {\tiny
     \texttt{grothoff@taler.net}\\
     }
   \end{center}
 \end{frame}
 
 \appendix
 
 \begin{frame}{References}
   \begin{enumerate}
  \item{Özgür Kesim, Christian Grothoff, Florian Dold and Martin Schanzenbach.
       {\em Zero-Knowledge Age Restriction for GNU Taler}.
        {\bf 27th European Symposium on Research in Computer Security (ESORICS), 2022}.}
  \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}.}
   \end{enumerate}
 \end{frame}
 
 
 
 
 % This should be last...
 \begin{frame}{Acknowledgments}
 
   \begin{minipage}{0.45\textwidth} \ \\
     {\tiny Funded by the European Union (Project 101135475).}
 
     \begin{center}
       \includegraphics[width=0.5\textwidth]{../bandera.jpg}
     \end{center}
   \end{minipage}
   \hfill
   \begin{minipage}{0.45\textwidth}
     {\tiny Funded by SERI (HEU-Projekt 101135475-TALER).}
 
     \begin{center}
       \includegraphics[width=0.65\textwidth]{../sbfi.jpg}
     \end{center}
   \end{minipage}
 
   \vfill
 
   {\tiny
 
     Views and opinions expressed are however those of the author(s) only
     and do not necessarily reflect those of the European Union. Neither the
     European Union nor the granting authority can be held responsible for
     them.
 
   }
 \end{frame}
 
 \end{document}