From 44ddaaca7fb1f16c804d31d5414960a07900d087 Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Wed, 9 Nov 2016 16:37:09 +0100 Subject: [PATCH] address FIXMEs --- doc/paper/taler.tex | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/doc/paper/taler.tex b/doc/paper/taler.tex index 28dd4a670..89c7e7e82 100644 --- a/doc/paper/taler.tex +++ b/doc/paper/taler.tex @@ -247,13 +247,11 @@ disintermediated transactions. %\subsection{Chaum-style electronic cash} -% FIXME: what limitations? substantiate! Chaum~\cite{chaum1983blind} proposed a digital payment system that would provide some customer anonymity while disclosing the identity of the merchants. DigiCash, a commercial implementation of Chaum's -proposal, had some limitations and ultimately failed to be widely -adopted. In our assessment, key reasons for DigiCash's failure -include: +proposal ultimately failed to be widely adopted. In our assessment, +key reasons for DigiCash's failure include: \begin{itemize} \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, %an open problem stated already in~\cite{Camenisch05compacte-cash}. % 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, 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 %spending could be removed, thus switching the scheme to only protection %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 deanonymize citizens. -\subsection{Offline Payments} +\subsection{Offline Payments} \label{sec:offline} Chaum's original proposals for anonymous digital cash avoided the need for online interactions with the exchange to detect double spending by