Is Big Brother watching you?
Clive Longbottom   
By: Clive Longbottom, Head of Research
Quocirca
Published: 4th December, 2005
Copyright © 2005 Quocirca     Logo for Quocirca

A little while back, Tesco utilised RFID tags to monitor who was picking up
Gillette razors and blades in its stores. In the trial, each pack of razors
had a simple RFID tag on it that was linked to a localised receiver, which
in turn was linked to a webcam that photographed the person picking up the
pack.

Whether you want to look at this as a means of market management (let's have
a look at who actually buys razors; let's look at who picks them up and puts
them back down) or pilferage management (Mach 3 razorblades are a key form
of payment for drugs, I am led to believe, due to their value and small
size), the trial seems reasonably innocuous.

However, the trial soon became known to some members of the public ­ and the
civil liberties groups. Suddenly, the story took on a life of its own. Tesco
was putting RFID tags on items to be able to track people's lives ­ from the
shop to the home and beyond. The sky was falling and Chicken Little was
unprepared!

But hang on ­ these are RFID chips and passive ones at that. They need an
RFID reader to be able to pass on any information. Are any of you going to
buy a pack of Gillette razorblades that has a suspiciously large block of
electronics, a large battery and a transmitter? That's what would be
required for Tesco to be able to track you at home.

And would Tesco want to spend the money on a system that cost more than the
original goods to do this? Of course not. Why go to all of this trouble when
it is far easier for Tesco to give you a loyalty card and track all of your
spending in their stores that way?

At the moment, RFID is still in its infancy and even passive tags are
relatively expensive. The main usage is in the manufacturing supply chain ­
tagging pallets of goods, rather than individual goods ­ and is expanding
into high-value individual goods where the cost of RFID can be more easily
absorbed.

Still, even if the cost of a passive RFID tag could be brought down to less
than one eurocent, the cost of applying this onto a can of 30 eurocents
baked beans will rapidly eat up any profit margin on the product ­ and to
what end?

Yes, the supermarket will be able to monitor how goods are selling in the
store and fill up shelves in a more economic manner. Possibly the shops
could move to a faster check-out system, where the trolley is RFID-scanned
for the price of all its contents at once, rather than scanning the bar code
on each item individually. Is it worth it at this stage? Probably not.

Where we are seeing great strides in useful RFID technology is in areas such
as intelligent packaging.

For example, Swedish company Cypak has created printable inks that can be
applied to ordinary cardboard to create full systems attached to RFID
systems in the packaging itself. These systems can be used for drugs
testing, where it is necessary to know exactly when a pill was pushed
through its packaging by the patient, or in parcels, where full knowledge of
when a parcel was opened could be useful.

However, even Cypak has had to look at the costs of such systems.
Intelligent packaging by itself is of interest, but is not an overwhelming
value proposition that it is worth paying a significant premium for.

By minimising componentry (the RFID system is a single, mass-produced
component) and utilising existing printing technologies for the circuitry,
the cost of RFID-enabling packaging has been kept low. Cypak found the cost
of existing RFID readers was prohibitive and so designed its own ­ coming in
at a cost of a few euros, rather than the tens to hundreds from other
sources.

Such innovative usage of RFID seems the way to go.

Work from the likes of the University of Berkeley, Intel and BT on RFID
'dust' or 'motes' is also showing longer-term promise. Here, extremely small
RFID tags act as miniature low-power transceivers, passing on information as
required in the manner of a mesh or grid.

Currently being targeted at the military and civil engineering projects,
where in-situ wired networks or formalised wireless networks can have
problems, motes may be the means of providing ad-hoc specialised monitoring
systems.

As time moves forwards, we could be looking at self-powered motes at the
nano-technology range ­ perhaps powered by solar or piezo technology ­
making it possible for these sensors to activate only when someone touches
or steps on them.

This means the need for expensive RFID readers will be minimised ­
information will flow across the RFID mesh and be aggregated at fewer RFID
reader points. Roads could be covered in Tarmac with motes embedded in it,
counting the number of vehicles passing over it and their weights. Homes
could use mote-driven temperature sensors to create rooms that self-regulate
down to tenths of a degree. Motes will be embedded into the material of
items such as the packaging of the goods we buy, the paint on the shelves
these items sit on and the lino on the shop's floor.

So this brings us back to the original discussion: RFID is no threat to
civil liberties at the moment ­ unless you happen to want to shoplift from
an establishment that is trialling RFID-driven photographic systems. If the
cost of RFID comes down to where embedding it into the fabric of the whole
environment becomes possible, though, we could run into the possibility
where the unscrupulous could link disparate systems together to track the
usage of specific items.

At the end of it all, though, do I really care that Tesco finds out what I
do with its razors?



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