--- a/slides/slides03.tex	Tue Oct 08 13:01:59 2013 +0100
+++ b/slides/slides03.tex	Wed Oct 09 15:51:03 2013 +0100
@@ -417,6 +417,18 @@
 \end{frame}}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\mode<presentation>{
+\begin{frame}[c]
+
+\begin{center}
+\includegraphics[scale=0.45]{pics/trainwreck.jpg}\\
+one general defence mechanism is\\\alert{\bf defence in depth}
+\end{center}
+
+  
+\end{frame}}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -526,17 +538,17 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
-\begin{frame}[c]
-
-\small
-A programmer might be careful, but still introduce vulnerabilities:\bigskip
-
-{\lstset{language=Java}\fontsize{8}{10}\selectfont%
-\texttt{\lstinputlisting{../progs/C2a.c}}}
-
-  
-\end{frame}}
+%\mode<presentation>{
+%\begin{frame}[c]
+%
+%\small
+%A programmer might be careful, but still introduce vulnerabilities:\bigskip
+%
+%{\lstset{language=Java}\footnotesize
+%\texttt{\lstinputlisting{../progs/C2a.c}}}
+%
+% 
+%\end{frame}}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -582,7 +594,7 @@
 \small
 \texttt{string} is nowhere used:\bigskip
 
-{\lstset{language=Java}\fontsize{8}{10}\selectfont%
+{\lstset{language=Java}\footnotesize
 \texttt{\lstinputlisting{../progs/C4.c}}}\bigskip
 
 this vulnerability can be used to read out the stack
@@ -593,10 +605,11 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \mode<presentation>{
 \begin{frame}[c]
-\frametitle{\begin{tabular}{c}Protections against\\ BO Attacks\end{tabular}}
+\frametitle{\begin{tabular}{c}Protections against\\ Buffer Overflow Attacks\end{tabular}}
 
 \begin{itemize}
 \item use safe library functions
+\item stack caneries
 \item ensure stack data is not executable (can be defeated)
 \item address space randomisation (makes one-size-fits-all more difficult)
 \item choice of programming language (one of the selling points of Java)