Correct [SBB2019] to [SWB2019], and note that the BCTV14 vulnerability affected Soundness.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

protocol/protocol.tex

@@ -7514,8 +7514,8 @@ together with a \provingSystem implementation that is interoperable with the \Zc
 }
 
 \vuln{
-$\BCTV$ is subject to a security vulnerability that could allow violation of
-Knowledge Soundness \cite{CVE-2019-7167} \cite{SBB2019}. The consequence for \Zcash is that
+$\BCTV$ is subject to a security vulnerability that could allow violation of Knowledge Soundness
+(and Soundness) \cite{CVE-2019-7167} \cite{SWB2019}. The consequence for \Zcash is that
 balance violation could have occurred before activation of the \Sapling network upgrade,
 although there is no evidence of this having happened. The vulnerability is believed
 to have been fully mitigated by activation of \Sapling. The use of $\BCTV$ in \Zcash is
@@ -9797,6 +9797,15 @@ Peter Newell's illustration of the Jubjub bird, from \cite{Carroll1902}.
 \intropart
 \section{Change History}
 
+\subparagraph{2019.0-beta-35}
+2019-02-05
+
+\begin{itemize}
+    \item Correct [SBB2019] to \cite{SWB2019}.
+    \item The $\BCTV$ vulnerability affected Soundness as well as Knowledge Soundness.
+\end{itemize}
+
+\introlist
 \subparagraph{2019.0-beta-34}
 2019-02-05
 

protocol/zcash.bib

@@ -1192,8 +1192,8 @@ Proceedings of the 19th Annual International Cryptology Conference
    urldate={2019-02-05}
 }
 
-@misc{SBB2019,
-   presort={SBB2019},
+@misc{SWB2019,
+   presort={SWB2019},
    author={Josh Swihart and Benjamin Winston and Sean Bowe},
    title={Zcash {C}ounterfeiting {V}ulnerability {S}uccessfully {R}emediated},
    date={2019-02-05},