--- a/handouts/ho01.tex	Sat Jan 03 23:14:47 2015 +0000
+++ b/handouts/ho01.tex	Sun Mar 01 00:11:13 2015 +0000
@@ -639,8 +639,12 @@
 
 
 \end{document}
-%%% 
 
+%%% fingerprints  vs. passwords (what is better)
+https://www.youtube.com/watch?v=VVxL9ymiyAU&feature=youtu.be
+
+%%% cookies
+http://randomwalker.info/publications/cookie-surveillance-v2.pdf
 
 
 %%% Local Variables: