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<p><!-- Make sure you modify the 4Cast title in this section -->
<span style="font-size: 20px; font-weight: bold;
color: rgb(0, 0, 0); font-family: arial;
line-height: 110%;">OPLIN 4cast #349: Telltale
MACs</span><br>
<!-- Make sure you modify the date of the 4Cast in this section -->
<span style="font-size: 11px; font-weight: normal;
color: rgb(102, 102, 102); font-style: italic;
font-family: arial;">August 28st, 2013</span></p>
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<p style="text-align: justify;font-size: 16px;
font-family: arial; line-height: 110%;"><img
alt="radar"
src="cid:part4.09000408.02080504@oplin.org"
height="105" width="110" align="left">Modern
smartphones contain quite a few sensors that apps
can use to gather data about you. The tri-axial
accelerometer, for example, can be used by
exercise apps to determine how fast you are moving
while your phone is in your pocket or purse, and
when coupled with data gathered by the phone's
magnetometer and gyroscope, the apps can also know
in what direction you are moving and even <a
href="http://www.insidescience.org/content/your-smartphone-knows-you-better-you-know-yourself/904">gather
clues</a> about how much you weigh. Of course,
if you don't use the apps, then you don't share
this data about yourself. But there's one piece of
information a smartphone broadcasts every time it
is using Wi-Fi or Bluetooth that you can't turn
off: its MAC (media access control) address, which
is a hardware identification number required by
most network technologies. A marketing company in
London recently demonstrated a clever way of
harvesting useful information from MAC addresses -
until public outcry forced city officials to make
them turn it off.
</p>
<div> </div>
<ul style="text-align: left;">
<li style="text-align: justify; font-size: 16px;
font-family: arial; line-height: 110%;"><a
href="http://qz.com/112873/this-recycling-bin-is-following-you/">This
recycling bin is following you</a>
(Quartz/Siraj Datoo) "The bins record a unique
identification number, known as a <a
href="http://en.wikipedia.org/wiki/MAC_address">MAC
address</a>, for any nearby phones and other
devices that have Wi-Fi turned on. That allows
Renew to identify if the person walking by is
the same one from yesterday, even her specific
route down the street and how fast she is
walking."</li>
<li style="text-align: justify; font-size: 16px;
font-family: arial; line-height: 110%;"><a
href="http://arstechnica.com/security/2013/08/no-this-isnt-a-scene-from-minority-report-this-trash-can-is-stalking-you/">No,
this isn't a scene from <em>Minority Report</em>.
This trash can <em>is</em> stalking you</a>
(Ars Technica/Dan Goodin) "The marketing
materials don't say this, but it might also be
possible to attach specific attributes to the
MAC addresses that are collected. A phone that
goes into the women's room probably belongs to a
female, for instance, while a MAC address
entering the Big and Tall clothing retailer
probably belongs to a person of large carriage."</li>
<li style="text-align: justify; font-size: 16px;
font-family: arial; line-height: 110%;"><a
href="http://screenmediadaily.com/smartphone-tracking-when-good-intentions-go-wrong/">Smartphone
tracking: When good intentions go wrong</a>
(ScreenMedia Daily/SMD Editor) "Renew didn't do
itself any favors when they said in their press
release that the 'consolidated data of our beta
testing highlights the significance of the Renew
ORB technology as a powerful tool for corporate
clients and retailers. It provides an
unparalleled insight into the past behavior of
each unique device including entry/exit points,
dwell times, places of work, places of interest,
and affinity to other devices - and should
provide compelling reach database for predictive
analytics, such as likely places to eat, drink,
personal habits etc.'"</li>
<li style="text-align: justify; font-size: 16px;
font-family: arial; line-height: 110%;"><a
href="http://www.bbc.co.uk/news/technology-23665490">City
of London calls halt to smartphone tracking
bins</a> (BBC News/Joe Miller) "While the
collection of anonymous data through MAC
addresses is legal in the UK, the practice has
been described as a 'grey area'. The UK and the
EU have strict laws about mining personal data
using cookies, which involves effectively
installing a small monitoring device on people's
phones or computers, but the process of tracking
MAC codes leaves no trace on individuals'
handsets."</li>
</ul>
<div style="text-align: left;"> </div>
<p style="text-align: left; font-size: 20px;
font-family: arial; line-height: 110%;"><small><strong><em>MAC
fact:</em></strong></small><br>
</p>
<div style="text-align: justify; font-size: 16px;
font-family: arial; line-height: 110%;">The first
portion of the MAC address, which is stored in a
smartphone's hardware when it is made, identifies
the manufacturer, so the recycling bins in London
also knew the brands of the phones people were
carrying.
</div>
<div style="text-align: left;"> </div>
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