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-rw-r--r--doc/paper/taler.tex11
1 files 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