--- a/slides/slides01.tex	Fri Sep 30 19:55:35 2016 +0100
+++ b/slides/slides01.tex	Tue Oct 04 13:44:05 2016 +0100
@@ -925,7 +925,7 @@
 
 \begin{itemize}
 \item Do not send passwords in plain text.
-\item Security questions are tricky to get right.
+\item Security questions are tricky to get right (you cannot hash them).
 \end{itemize}
 
 \end{frame}