Re: For Liars and Loafers, Cellphones Offer an Alibi
At 02:02 AM 6/27/04 +0200, Thomas Shaddack wrote:
Can it be disabled by hardware hack of the phone, a mikropower jammer,
or >using an "unofficial" firmware? I wrote: It would be hard to verify/test that you had in fact cut the correct trace, and it would depend on the phone, and you would void your warrantee. Firmware hacks are of course the free man's last refuge. Of course disabling your GPS unit will not prevent the fascists from doing triangulation with signal strength, ie the alternative (and cheaper and less precise alternative). That's merely physics and geometry. To counter that, you need to hack the antennae and and can only displace yourself a few miles. ---- Go for the head shot, they're wearing body armor
On Sat, 26 Jun 2004, Major Variola (ret) wrote:
Of course disabling your GPS unit will not prevent the fascists from doing triangulation with signal strength, ie the alternative (and cheaper and less precise alternative). That's merely physics and geometry. To counter that, you need to hack the antennae and and can only displace yourself a few miles.
Interestingly, some [early] models had external antenna jacks built in to them. New life for old cell phones!
---- Go for the head shot, they're wearing body armor
If at close range, it is far easier to simply throw water at them prior to firing. For one, the water acts as apowerful lubricant, effectively removing the armor, and for two, it distracts the hell out of them ;-) -- Yours, J.A. Terranson sysadmin@mfn.org "...justice is a duty towards those whom you love and those whom you do not. And people's rights will not be harmed if the opponent speaks out about them." Osama Bin Laden
"J.A. Terranson" <measl@mfn.org> wrote:
Interestingly, some [early] models had external antenna jacks built in to them.
Many still have test jacks on them. Both my old Samsung A500 and my current Sanyo SCP-8100 have a connector (either MC or SMA, IIRC) on the back hidden under a rubber plug. My guess is that with an appropriate connector you could use, e.g., a pringles can to make your antenna much more directional. Triangluating on a non-isotropic antenna should be quite a bit harder... -- Riad S. Wahby rsw@jfet.org
On Sun, 27 Jun 2004, Riad S. Wahby wrote:
"J.A. Terranson" <measl@mfn.org> wrote:
Interestingly, some [early] models had external antenna jacks built in to them.
Many still have test jacks on them. Both my old Samsung A500 and my current Sanyo SCP-8100 have a connector (either MC or SMA, IIRC) on the back hidden under a rubber plug. My guess is that with an appropriate connector you could use, e.g., a pringles can to make your antenna much more directional.
Many phones have such connectors used by car handsfree holders, in order to use an antenna mounted externally on the vehicle instead of transmitting from the handset into the partially open Faraday cage of the car. RF-skilled people should have no problems adding such connectors to their phones even if they aren't there from the factory.
participants (4)
-
J.A. Terranson -
Major Variola (ret) -
Riad S. Wahby -
Thomas Shaddack