--- a/handouts/ho03.tex	Fri Oct 10 14:22:41 2014 +0100
+++ b/handouts/ho03.tex	Fri Oct 10 15:49:23 2014 +0100
@@ -330,7 +330,7 @@
 the part of the program that was intended to be only available
 after the correct key was typed in. 
 
-\subsection*{Paylods}
+\subsection*{Payloads}
 
 Unfortunately, much more harm can be caused by buffer overflow
 attacks. This is achieved by injecting code that will be run
@@ -440,12 +440,12 @@
   \end{tikzpicture}
 \end{center}
 
-\noindent Then we can fill up the gray part of the string with
+\noindent Then we can fill up the grey part of the string with
 \pcode{NOP} operations. The code for this operation is
 \code{\\0x90}. It is available on every architecture and its
 purpose in a CPU is to do nothing apart from waiting a small
 amount of time. If we now use an address that lets us jump to
-any address in the gray area we are done. The target machine
+any address in the grey area we are done. The target machine
 will execute these \pcode{NOP} operations until it reaches the
 shellcode. A moment of thought can convince you that this
 trick can hugely improve our odds of finding the right