
diff -r aebcaa545f81 -r 514485146641 hws/hw01.tex
--- a/hws/hw01.tex	Thu Jul 14 13:07:23 2016 +0100
+++ b/hws/hw01.tex	Tue Jul 19 12:08:49 2016 +0100
@@ -48,25 +48,6 @@
       unlocks the doors? Which threat could be thwarted
       by that?
 
-\item And another one: Imagine you have at home a broadband
-      contract with TalkTalk. You do not like their service
-      and want to switch to Virgin, say. The procedure
-      between the Internet providers is that you contact
-      Virgin and set up a new contract and they will
-      automatically inform TalkTalk to terminate the old
-      contract. TalkTalk will then send you a letter to
-      confirm that you want to terminate. If they do not hear
-      from you, they will proceed with terminating
-      the contract and will request any outstanding
-      cancellation fees. Virgin on the other hand sends you a
-      new router and paperwork about the new contract.
-      Obviously this way of doing things is meant to make
-      switching as convenient as possible. Still can
-      you imagine situations in which this way of switching
-      providers can cause you a lot of headaches? For
-      this consider that TalkTalk needs approximately 14 days
-      to reconnect you and might ask for reconnection fees.
-      
 \item And another one: A water company installed devices that
       transmit meter readings when their company car drives
       by. How can this transmitted data be abused, if not
@@ -94,10 +75,7 @@
 % be done. This is something. Therefore, we must do it." 
 % Never mind if the something makes any sense or not.
     
-\item And another one: Imagine you are researching security
-      products (e.g.~CCTV, alarms etc) on a helpful website.
-      They ask you for your address details? Think about
-      whether this can be bad for you.
+
 
 
 %\item Imagine there was recently a break in where computer criminals
@@ -117,6 +95,13 @@
       Under which circumstance should users be required to
       change their password?
 
+\item The biggest dictionary for dictionary attacks I know
+      contains 15 Billion entries. If you try out all of these
+      15 Billion entries in order to hack one password how
+      much percent of the full brute-force space did you
+      cover. For this assume passwords use 62 charcaters and
+      are typically 8 characters long.
+
 \item What are good uses of cookies (that is browser cookies)?
 
 \item Why is making bank customers liable for financial fraud a bad




