--- a/handouts/ho01.tex	Thu Jul 06 13:51:18 2017 +0100
+++ b/handouts/ho01.tex	Sat Sep 23 13:08:35 2017 +0100
@@ -9,6 +9,10 @@
 \fnote{\copyright{} Christian Urban, 
 King's College London, 2014, 2015, 2016}
 
+% passwords at dropbox
+%%https://blogs.dropbox.com/tech/2016/09/how-dropbox-securely-stores-your-passwords/
+
+
 %Ross anderson
 %https://youtu.be/FY2YKxBxOkg
 %http://www.scmagazineuk.com/amazon-launches-open-source-tls-implementation-s2n/article/424360/