Add an ack

svn:r10688

doc/design-paper/sptor.tex

@@ -343,8 +343,10 @@ too much anonymity or other properties.
 
 These are difficult and open questions. Yet choosing not to solve them
 means leaving most users to a less secure network or no anonymizing
-network at all.
+network at all.\\
 
+\noindent{\bf Acknowledgment:} Thanks to Matt Edman for many
+  helpful comments on a draft of this article.
 \bibliographystyle{plain} \bibliography{tor-design}
 
 \end{document}