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address FIXMEs

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Christian Grothoff 2016-11-09 16:37:09 +01:00
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doc/paper/taler.tex
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@ -247,13 +247,11 @@ disintermediated transactions.
%\subsection{Chaum-style electronic cash} %\subsection{Chaum-style electronic cash}
% FIXME: what limitations? substantiate!
Chaum~\cite{chaum1983blind} proposed a digital payment system that Chaum~\cite{chaum1983blind} proposed a digital payment system that
would provide some customer anonymity while disclosing the identity of would provide some customer anonymity while disclosing the identity of
the merchants. DigiCash, a commercial implementation of Chaum's the merchants. DigiCash, a commercial implementation of Chaum's
proposal, had some limitations and ultimately failed to be widely proposal ultimately failed to be widely adopted. In our assessment,
adopted. In our assessment, key reasons for DigiCash's failure key reasons for DigiCash's failure include:
include:
\begin{itemize} \begin{itemize}
\item The use of patents to protect the technology; a payment system \item The use of patents to protect the technology; a payment system
@ -322,10 +320,9 @@ search costs become linear in the total value of all transactions.
%In principle, one could correct this by adding multiple denominations, %In principle, one could correct this by adding multiple denominations,
%an open problem stated already in~\cite{Camenisch05compacte-cash}. %an open problem stated already in~\cite{Camenisch05compacte-cash}.
% NO: he cannot give change, so that does not really work! % NO: he cannot give change, so that does not really work!
% FIXME: Claim below needs to be substantiated!
As described, the scheme employs offline double spending protection, As described, the scheme employs offline double spending protection,
which inherently makes it fragile and creates an unneccessary which inherently makes it fragile and creates an unneccessary
deanonymization risk. deanonymization risk (see Section~\ref{sec:offline}).
%We believe the offline protection from double %We believe the offline protection from double
%spending could be removed, thus switching the scheme to only protection %spending could be removed, thus switching the scheme to only protection
%against online doulbe spending, like Taler. %against online doulbe spending, like Taler.
@ -1175,7 +1172,7 @@ actually facilitates voluntary cooperation between the exchange and
criminals~\cite{sander1999escrow} and where the state could criminals~\cite{sander1999escrow} and where the state could
deanonymize citizens. deanonymize citizens.
\subsection{Offline Payments} \subsection{Offline Payments} \label{sec:offline}
Chaum's original proposals for anonymous digital cash avoided the need Chaum's original proposals for anonymous digital cash avoided the need
for online interactions with the exchange to detect double spending by for online interactions with the exchange to detect double spending by