--- a/hws/hw07.tex	Thu Nov 26 11:59:38 2015 +0000
+++ b/hws/hw07.tex	Thu Nov 26 12:28:10 2015 +0000
@@ -13,7 +13,7 @@
 \item What is a \emph{re-identification attack}?
 
 \item Imagine you have a completely `innocent' email message,
-      like birthday wishes to your grandmother? Why should you
+      like birthday wishes to your grandmother. Why should you
       still encrypt this message and your grandmother take the
       effort to decrypt it?