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| Authored by: RPN on Thursday, July 04 2013 @ 08:57 AM EDT |
Not an expert! However in the comments to this story on Ars Technica several
people pointed out you can detect the presence of a GPS receiver, indeed any
receiver, indirectly. Something to do with modern aerial design and their highly
tuned nature. Did I say I'm not an expert? One also pointed out this was how the
police looked for radar speed trap detectors where such things are illegal so it
is an approach that is in use.
Richard.[ Reply to This | Parent | # ]
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| Authored by: Anonymous on Thursday, July 04 2013 @ 04:28 PM EDT |
I assumed it was just the usual slackness with language, and
what they meant was that by any of the multifarious channels
available (cell channel, wifi, blutooth, NFC, yadda yadda)
they could interrogate the GPS chip in your phone, turn it on
if it was off, and get your location from that without your
advice or consent.
I think I need a lie down ...
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| Authored by: Anonymous on Friday, July 05 2013 @ 02:46 AM EDT |
However, most modern receivers are also transmitters as they mix the signal
received with their own weak signal in order to more easily decode it. In fact,
it is so easy to determine which station a car FM radio is tuned to that there
are commercial systems that can be put in billboards and such to do just that.[ Reply to This | Parent | # ]
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