--- a/slides/slides05.tex	Wed Oct 29 16:07:22 2014 +0000
+++ b/slides/slides05.tex	Wed Oct 29 16:49:00 2014 +0000
@@ -277,7 +277,7 @@
 \begin{center}
 \begin{tabular}{ll}
 \bl{$A \rightarrow B$:} & \bl{$N_A$}\\  
-\bl{$B \rightarrow A$:} & \bl{$\{N_A, N_B\}_{K_{ab}}$}\\
+\bl{$B \rightarrow A$:} & \bl{$\{N_A, N_B\}_{K_{AB}}$}\\
 \bl{$A \rightarrow B$:} & \bl{$N_B$}\\
 \end{tabular}
 \end{center}