Shopping centre uses mobile phone data to "monitor visitor levels"

James Firth james2 at
Thu Aug 25 09:50:28 BST 2011

> On Wed, 24 Aug 2011, James Firth wrote:
> | Reading the blurb from Path Intelligence it reads to me on first scan
> as
> | though some kind of signature is being cribbed from the subscriber-
> base
> | station comms.
> [...]
> | I can't see how this can legally be done without the consent of the
> | network operator
> For 2G, this bit isn't encrypted, so can be sniffed.
> The specific data gathered (TIMSI) clearly *not* *content*, so not
> interception under RIPA, if that's what you're thinking of.

But the point I was making is that TIMSI would be too infrequent to provide
real-time tracking over a small geographic area (small area where the
subscriber unit remains registered with the same BS), making me sceptical
that this is indeed the method deployed.

James Firth

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