--- a/slideshow.tex	Tue Aug 08 18:54:58 2006 -0400
+++ b/slideshow.tex	Tue Aug 08 18:57:59 2006 -0400
@@ -202,7 +202,7 @@
 %		- I'll combine them, and create a lilug keyring that
 %		everyone can import
 \overlays{8}{
-\begin{slide}{Before Next Meetings}
+\begin{slide}{Before Next Meeting}
 	\begin{itemstep}[2]
 		\item Generate key pair
 		\item Send the \emph{public} key to me
@@ -258,10 +258,39 @@
 % Q&A
 \overlays{1}{
 \begin{slide}{Q\&A}
-	\vspace{1in}
+	\vspace{0.5in}
 	\begin{center}
 		Questions?
+
+\vspace{0.5in}
+\small
+Remember: Just because I'm paranoid doesn't mean they aren't out to get me.
+\normalsize
 	\end{center}
 \end{slide}}
 
+%%%%%%% EXTRA SLIDES
+
+% Caesar cipher
+\overlays{1}{
+\begin{slide}{Caesar Cipher}
+	\begin{itemize}
+		\item To encrypt: \\
+		$e = (c + 3)\, mod\, 26$
+		\item To decrypt: \\
+		$c = (e - 3)\, mod\, 26$
+	\end{itemize}
+\end{slide}}
+
+% ROT13
+\overlays{1}{
+\begin{slide}{ROT13}
+	\begin{itemize}
+		\item To encrypt: \\
+		$e = (c + 13)\, mod\, 26$
+		\item To decrypt: \\
+		$c = (e - 13)\, mod\, 26 = (e + 13)\, mod\, 26$
+	\end{itemize}
+\end{slide}}
+
 \end{document}