From 850e7ea0192db107309366845d853b427f71f5c2 Mon Sep 17 00:00:00 2001 From: Daira Hopwood Date: Mon, 17 Aug 2020 21:32:15 +0100 Subject: [PATCH] Correct an off-by-one in an expression used in the definition of c for windowed Pedersen commitments (this does not change the value of c). Signed-off-by: Daira Hopwood --- protocol/protocol.tex | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/protocol/protocol.tex b/protocol/protocol.tex index d00a2b57..8398de1b 100644 --- a/protocol/protocol.tex +++ b/protocol/protocol.tex @@ -6570,7 +6570,7 @@ Let $\FindGroupJHash$ be as defined in \crossref{concretegrouphashjubjub}. Let $\UncommittedSapling$ be as defined in \crossref{constants}. -Let $c$ be the largest integer such that $4 \mult \hfrac{2^{4 \mult c}}{15} \leq \hfrac{\ParamJ{r}-1}{2}$, +Let $c$ be the largest integer such that $4 \mult \hfrac{2^{4 \mult c}-1}{15} \leq \hfrac{\ParamJ{r}-1}{2}$, i.e.\ $c := 63$. \newsavebox{\gencountbox} @@ -10830,6 +10830,16 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}. \lsection{Change History}{changehistory} +\historyentry{2020.1.14}{} +\begin{itemize} + \item No changes to \Sprout. +\sapling{ + \item Correct an off-by-one in an expression used in the definition of $c$ in + \crossref{concretepedersencommit} (this does not change the value of $c$). +} %sapling +\end{itemize} + + \historyentry{2020.1.13}{2020-08-11} \begin{itemize} \sapling{