diff -r 2cb42412f3fd -r a97b828bf87f hws/hw02.tex
--- a/hws/hw02.tex	Fri Oct 03 13:14:34 2014 +0100
+++ b/hws/hw02.tex	Fri Oct 03 15:37:05 2014 +0100
@@ -36,9 +36,21 @@
 \item[$\Box$] Each ballot has a unique ID. When a voter is given a ballot, the ID is recorded. When the voter submits his or her ballot, this ID is checked against the record.
 \end{itemize}
 
+\item In the Estonian general election, votes can be cast via Internet
+  some time before the election day. These votes cast via Internet can
+  be changed an unlimited amount of times, the last vote is
+  tabulated. You can even change your vote on the polling day in
+  person. Which security requirement does this procedure address?
+
 \item What is the main difference between online banking and e-voting? 
 (Hint: Why is the latter so hard to get secure?)
 
+\item Imagine, hypothetically, you have a perfectly secure Internet
+  voting system, by which I mean nobody can tamper with or steal votes
+  between your browser and the central server responsible for vote
+  tallying. What can still go wrong with such a perfectly secure
+  voting system, which is prevented in traditional elections with
+  paper-based ballots?
 \end{enumerate}