# HG changeset patch # User Christian Urban # Date 1442841821 -3600 # Node ID 5b943e29b7177728259427b452693a5efeb03909 # Parent 036a762b02cf50ead08286b1f5f882fd995d4103 updated diff -r 036a762b02cf -r 5b943e29b717 hws/hw01.pdf Binary file hws/hw01.pdf has changed diff -r 036a762b02cf -r 5b943e29b717 hws/hw01.tex --- a/hws/hw01.tex Sun Sep 20 22:09:58 2015 +0100 +++ b/hws/hw01.tex Mon Sep 21 14:23:41 2015 +0100 @@ -5,6 +5,9 @@ \section*{Homework 1} +\HEADER + + \begin{enumerate} \item {\bf (Optional)} If you want to have a look at the code presented in the lectures, install \texttt{Node.js} available (for free) from @@ -47,20 +50,20 @@ \item And another one: Imagine you have at home a broadband contract with TalkTalk. You do not like their service - and want to switch, say, to Virgin. The procedure + and want to switch to Virgin, say. The procedure between the Internet providers is that you contact - Virgine and set up a new contract and they will + 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 otherwise, they will proceed with terminating + 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 for you as convenient as possible. Still can - you imagine in which situations this way of switching - providers can cause you a lot of headaches to you? For + 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. @@ -72,18 +75,19 @@ prevented. Hint: Consider the fact that every person uses approximately 120l of water every day. -\item And another one: Nowadays everybody is scared at a bomb - going off at a big event, say a football game. To - mitigate such a threat, you order expensive metal - detectors and hire a security team that will staff these - detectors at each game. Think whether people are really - safer at a football game with metal detectors or not. - Hint: People certainly might *\emph{feel}* safer by - going through metal detectors, but the question is - whether they *\emph{are}* safer. Hint: Consider how - people arrive at such an event: within a relative short - amount of time, thousands, if not more, spectators will - arrive at your football game. +%\item And another one: Nowadays everybody and their +% grandmother seems to be scared about a bomb going off at +% a big event, say a football game. To mitigate such a +% threat, you order expensive metal detectors and hire a +% security team that will staff these detectors at each +% game. Think whether people are really safer at a +% football game with metal detectors or not. Hint: People +% certainly might *\emph{feel}* safer by going through +% metal detectors, but the question is whether they +% *\emph{are}* safer. Hint: Consider how people arrive at +% such an event: within a relative short amount of time, +% thousands, if not more, spectators will arrive at your +% football game. %% CYA security - cover-your-ass % It's an attitude I've seen before: "Something must @@ -91,9 +95,9 @@ % 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 you address details? - Think about whether this can be bad for you. + products (e.g.~CCTV, alarms etc) on a helpful website. + They ask you for you address details? Think about + whether this can be bad for you. %\item Imagine there was recently a break in where computer criminals @@ -107,7 +111,7 @@ \item Even good passwords consisting of 8 characters, can be broken in around 50 days (obviously this time varies a lot and - also gets shorterand shorter). Do you think it is good + also gets shorter and shorter). Do you think it is good policy to require users to change their password every 3 months (as King's did until recently)? Under which circumstance should users be required to change their diff -r 036a762b02cf -r 5b943e29b717 style.sty --- a/style.sty Sun Sep 20 22:09:58 2015 +0100 +++ b/style.sty Mon Sep 21 14:23:41 2015 +0100 @@ -30,3 +30,10 @@ \makeatletter \def\fnote{\gdef\@thefnmark{}\@footnotetext} \makeatother + + +\newcommand{\HEADER}{{\bf Please submit your solutions via the email address +7ccsmsen\@gmail.com. Please submit only ASCII text or PDFs. Every solution +should be preceeded by question. Solutions will only be accepted until +30th December!}\bigskip} +