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--- a/handouts/ho01.tex	Fri Dec 19 23:24:37 2014 +0000
+++ b/handouts/ho01.tex	Sat Dec 20 00:24:59 2014 +0000
@@ -627,6 +627,15 @@
 better in remembering (securely) longer and longer passwords.
 The big question is which technology can replace
 passwords\ldots 
+\medskip
+
+\noindent
+A recent research paper about surveillance using cookies is
+
+\begin{center}
+\url{http://randomwalker.info/publications/cookie-surveillance-v2.pdf}
+\end{center}
+
 
 \end{document}
 %%% 

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--- a/mk	Fri Dec 19 23:24:37 2014 +0000
+++ b/mk	Sat Dec 20 00:24:59 2014 +0000
@@ -1,4 +1,5 @@
 #!/bin/sh
+set -e
 
 subdirs="slides handouts hws" 
 

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