# HG changeset patch
# User Christian Urban <christian dot urban at kcl dot ac dot uk>
# Date 1412021466 -3600
# Node ID f7aa15984301915b3394188e94990e4673ddbddb
# Parent  f10d905e947f4b8c5b2d3995664f83a1f71900ea
updated

diff -r f10d905e947f -r f7aa15984301 handouts/ho01.pdf
Binary file handouts/ho01.pdf has changed
diff -r f10d905e947f -r f7aa15984301 handouts/ho01.tex
--- a/handouts/ho01.tex	Mon Sep 29 17:43:35 2014 +0100
+++ b/handouts/ho01.tex	Mon Sep 29 21:11:06 2014 +0100
@@ -554,7 +554,7 @@
 (especially if the database contains millions of entries). If
 we use no salt or one global salt, all hash-values will be the
 same for this password. So if a hacker is in the business of
-cracking as much passwords as possible, then it is a good idea
+cracking as many passwords as possible, then it is a good idea
 to concentrate on those very popular passwords. This is not
 possible if each password gets its own salt: since we assume
 the salt is generated randomly, each version of \pcode{123456}
diff -r f10d905e947f -r f7aa15984301 slides/slides02.tex
--- a/slides/slides02.tex	Mon Sep 29 17:43:35 2014 +0100
+++ b/slides/slides02.tex	Mon Sep 29 21:11:06 2014 +0100
@@ -72,6 +72,23 @@
 \end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[c]
+\frametitle{Defence in Depth}
+
+\bgein{center}
+\pcode{urbanc:$6$3WWbKfr1$4vblknvGr6FcDeF92R5xFn3mskfdnEn...:...}
+\end{center}
+
+\begin{itemize}
+\item hashes help when password databases are leaked
+\item salts help with protecting against dictionary attacks
+
+\end{itemize}
+
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  
+
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}[c]