[Community] Wifi, Modem and GPS

wonderphone at posteo.de wonderphone at posteo.de
Tue Jul 15 21:56:35 CEST 2014

Hi all,

Thank you for your reassuring answers!


Am 15.07.2014 11:23 schrieb Dr. H. Nikolaus Schaller:
> Am 15.07.2014 um 11:02 schrieb Sven Dyroff <S.Dyroff at phytec.de>:
>> Hello Nikolaus,
>>> And it is questionable if this "feature" would reveal additional 
>>> information to someone
>>> trying to observe you.
>> I wasn't aware of the precision of location determination of 2G/3G 
>> that Sebastian mentioned:
>>> Keep in mind that connected modem has already a way to determine
>>> location, often with much better precision than GPS. The external 
>>> GPS
>>> module has only one privacy-oriented benefit: ability to use it when
>>> GSM modem is completely turned off.
>> So the only way to keep privacy would be to drive an own free and 
>> open network of basestations. AFAIK the Netherlands already have such 
>> one. And in Germany it currently seems that a whole network could 
>> become free for buying...
> No. Even those networks can’t work without public regulation. I.e.
> since providing
> such infrastructure to public services is mandatory.
>>> Well, to be honest, the poor MH370 system should have had a 
>>> telemetry channel
>>> to permanently report the real GPS location (avoiding the 
>>> triangulation by Inmarsat
>>> data that was never designed to be used this way - and just 
>>> fortunate that it was
>>> logged at all).
>> Sorry Nikolaus, but do you really share the opinion that the security 
>> of *public* airplanes should be dependent on the way how *private* 
>> mobiles communicate??
> Did I say that with any letter in my words?
> No. I said that public airplanes should in my opinion better have
> (for good reasons) what we don’t want to have in private mobile
> communication devices (also for good, but different) reasons.
> Only the technological situation is very similar: GPS + Telemetry
> option or risk (depending on point of view) + triangulation.
> But it also shows how difficult it is to (mis-)use a system that was
> not designed for the purpose of locating someone. Try to assume to be
> someone who wants to permanently track you location. What would he
> really do? Try to manipulate the firmware of you specific modem, while
> the triangulation data is already available?
> BR,
> Nikolaus
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