On Fri, 13 Oct 2006 16:40:03 -0800, "Dana"
wrote:


"kony" wrote in message
.. .
On Fri, 13 Oct 2006 14:37:33 -0800, "Dana"
wrote:


You have not established that the signature (difference) of
such a device can be discriminated from a different device.

It is being done today.


What "it"?

Devices are being discriminated by their signature.
Various sensors are doing this.

Do you know how many MP3 players are out there?

Now how about the phones that can record? A theory about
what might be possible someday, is not same thing as what IS
being done today.

You seem to be vaguely claiming it's possible without really
considering EXACTLY what is necessary.