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@@ -856,7 +856,7 @@ The following steps are executed for microdonations with upgrade probability $p$
\subsection{Refreshing}
The following protocol is executed in order to refresh a coin $C'$ of denomination $K$ to
-a fresh coin $\widetilde{C}$ with the same denomination. In the protocol, $\kappa \ge 3$ is a security parameter.
+a fresh coin $\widetilde{C}$ with the same denomination. In the protocol, $\kappa \ge 3$ is a security parameter and $G$ is the generator of the elliptic curve.
\begin{enumerate}
\item For each $i = 1,\ldots,\kappa$, the customer