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'[OT]: Undetected PING for cellphones'
2001\11\21@021653 by Russell McMahon

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> 'PING' SERVICE CAN TEST MOBILE PHONE AVAILABILITY
>
> A German website enables users to check whether mobile phones are
> switched on and within reception range, without informing the phone
> subscribers who are being checked on.
>
> http://www.idg.net.nz/webhome.nsf/NL/16B1178ACA3DFB33CC256B0A0014E228

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2001\11\21@051501 by Kathy Quinlan

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Big brother knows all ;o)


Regards,

Kat.

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{Original Message removed}

2001\11\21@110907 by Bond, Peter

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> Big brother knows all ;o)

So, as well as the networks being able to locate you to within a relatively
small number of metres, an anonymous(ish) individual can now find out if
your phone is switched on and/or in range.

Which gets you *what*, precisely?

If I dial someone's phone with CLID disabled, I can find out if their phone
is switched on and in range (depending upon the service provider), or if
they are on the phone.  Relatively anonymously.  I'm not sure what benefit
that would give me, however...

Puzzled.  Not so much at it being a potential breach of privacy, but more
what use it is.

Peter
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2001\11\22@135912 by Peter L. Peres

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> Which gets you *what*, precisely?

A remote enabled DF-able transmitter on the person that can be used to
find and trace the person for example, once you know the cell he is in,
probably for days, or as long as the battery lasts, or longer if he keeps
it charged all the time. This can be done by the good guys or the bad
guys.

Peter

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2001\11\23@043052 by Bond, Peter

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> A remote enabled DF-able transmitter on the person that can be used to
> find and trace the person for example, once you know the cell
> he is in,
> probably for days, or as long as the battery lasts, or longer
> if he keeps
> it charged all the time. This can be done by the good guys or the bad
> guys.

OK, so the ping enables that particular mobile for the duration of the
check...  And it is transmitting on the same frequency as every other mobile
on that cell.  And you need to be in the same country, in the same cell (or
within appreciable range of that cell)... Which makes DF a little more
tricky at best.

*If*, of course, it isn't just managing a query to the provider's database
to see whether the phone is active in a cell...  Home Location
Register/Visitor Location Register etc.  I'm not sure the providers would go
for a system that would duplicate what is already done to track the location
of mobiles in cells.

There are still easier ways to get a more accurate location out of someone
with a phone switched on - they usually require the assistance/coercion of
the particular provider in the country the phone is in, however.

Privacy?  What's that then?

Peter

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