mirror of https://github.com/zcash/zips.git
Add note about the nonsmall-order check on rk.
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
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@ -3893,6 +3893,9 @@ where
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using $\AuthSignRandomizedPublic$ as the public key ---
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i.e.\ $\SpendAuthSigVerify{\AuthSignRandomizedPublic}(\SigHash, \spendAuthSig) = 1$.
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\end{consensusrules}
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\nnote{The check that $\AuthSignRandomizedPublic$ is not of small order is technically redundant with
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a check in the \spendCircuit, but it is simple and cheap to also check this outside the circuit.}
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} %sapling
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@ -9536,6 +9539,16 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
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\intropart
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\section{Change History}
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\subparagraph{2018.0-beta-22}
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\begin{itemize}
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\item No changes to \Sprout.
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\sapling{
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\item Add a note about redundancy in the nonsmall-order checking of $\AuthSignRandomizedPublic$.
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} %sapling
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\end{itemize}
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\introlist
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\subparagraph{2018.0-beta-21}
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\begin{itemize}
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