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Add a note about ballot key reuse #8

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Mar 7, 2024
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5 changes: 4 additions & 1 deletion main.tex
Original file line number Diff line number Diff line change
Expand Up @@ -373,7 +373,10 @@ \subsubsection{\texorpdfstring{$\func{SetupVoter}$}{SetupVoter}}
\item Generates a proof of representation $\func{RepProve}(\{G, H\}, C_i ; \{s, r\}) \mapsto \Pi_{\text{rep},i}$.
\item Posts $(i, C_i, \Pi_{\text{rep},i})$ to $\mathcal{B}$ as an authenticated message signed with its voter signing key from $L_{\text{voters}}$.
\end{enumerate}
We note that it is safe for a voter to reuse their ballot key across multiple elections.

We note that a voter may reuse their ballot key across multiple elections.
As described later, the value $s_i G$ will be revealed publicly during the tally process; this value will be common to any ballots cast using this key across all such elections.
However, it is not possible to link $s_i G$ to $C_i$ even under these circumstances.


\subsubsection{\texorpdfstring{$\func{VerifySetup}$}{VerifySetup}}
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