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@@ -355,6 +355,8 @@ coin do become linkable.
%solutions lead to an abandonment of these ideas by
%practitioners~\cite{selby2004analyzing}.
%
+Ian Goldberg's HINDE proposal addressed these schemes unlinkable change
+problem, but did not provide for taxability.
To our knowledge, the only publicly available effort to implement
Chaum's idea is Opencoin~\cite{dent2008extensions}. However, Opencoin