[chbot] Traffic lights and bluetooth

[Geoff]

A couple weeks ago I watched this talk on youtube:
https://www.youtube.com/watch?v=ubjuWqUE9wQ

Well worth a watch if you're interested in how much data you can gather by
listening as things go past. As the talker shows: Your phone is probably
broadcasting more data about you than you'd expect.... Bluetooth tracking
your car is minimal.

Geoffrey

On Thu, Sep 3, 2015 at 9:14 PM, Mark Atherton <markaren1 at xtra.co.nz> wrote:

> I guess I have a more cynical view about protecting long term privacy than
> you.
>
> If you understand possible threats and choose to ignore them that is fine,
> good luck to you - each to their own.
>
> All I pointed out was one example where aggregation of tiny amounts of
> data could lead to some larger conclusion - that's all. And the more
> amounts of tiny data we allow to leak, the larger the picture that can be
> drawn.
>
> -Mark
>
>
> On 3/09/2015 8:17 p.m., Charles Manning wrote:
>
>> Your BT is basically hanging out the window screaming "one two three four
>> five" every second or so.
>> They notice when that goes past one place.
>> They notice when it goes past another place.
>> They time the difference.
>>
>> I doubt they're writing it in a database or anything that lasts longer
>> than an hour or so to run their algorithms.
>>
>> If you want nefarious usage of this info, then look at marketing...
>>
>> There certainly are systems that track BT inside malls etc. There is a
>> system used for evaluating foot traffic in malls that watches movement of
>> BT devices.
>> They see how far people go into shops.
>> They see how people linger in front of shops.
>> They track if people cross from one side of a mall to another.
>>
>> I don't think they store anything long term, or try to associate ids with
>> people - just watch movement. This gives them an idea as to whether their
>> advertising and display windows are working. eg. person walking along, but
>> stops probably looked at the display window. Did they then go inside or
>> not? Where else did they stop? Where did they actually go in? They stopped
>> next to the ice cream freezer in the supermarket,where did they go next? Do
>> people have different patterns at different times of day?
>>
>> But they've been doing this sort of tracking for a long time - long
>> before BT. Some supermarkets embedded RFID tags in supermarket trolley
>> handles allowing them to track movement around the supermarket. This gets
>> used for optimising product placement (eg. put the milk and bread at the
>> back of the supermarket, but set up the flow so most people go through the
>> junk food isle too).
>>
>> As for tracking Mark and noticing he stopped at McD three times this
>> week, so let's jack up his life insurance premiums... I doubt that's
>> happening.
>>
>> -- Charles
>>
>
>
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