Cell phones have are now, more than ever, part of IT Security personnel's problem.
NETWORK WORLD NEWSLETTER
06/09/05
By M. E. Kabay
Anyone can use even an ordinary mobile phone as a microphone by
covertly dialing out; for example, one can call a recording
device at a listening station and then simply place the phone in
a pocket or briefcase before entering a conference room.
However, my friend and colleague Chey Cobb recently pointed out
a device from Nokia that is unabashedly being advertised as a
"Spy Phone" because of additional features that threaten
corporate security.
This $1,800 device works like a normal mobile phone but also
allows the owner to program a special phone number that turns
the device into a transmission device under remote control:
http://wirelessimports.com/ProductDetail.asp?ProductID=347In addition, the phone can be programmed for silent operation:
"By a simple press of a button, a seemingly standard cell phone
device switches into a mode in which it seems to be turned off.
However, in this deceitful mode the phone will automatically
answer incoming calls, without any visual or audio indications
whatsoever... A well placed bug phone can be activated on demand
from any remote location (even out of another country). Such
phones can also prove valuable in business negotiations. The spy
phone owner leaves the meeting room, (claiming a restroom break,
for instance), calls the spy phone and listens to the ongoing
conversation. On return the owners' negotiating positions may
change dramatically."
It makes more sense than ever to ban mobile phones from any
meeting that requires high security.
David Bennahum wrote an interesting article in December 2003
about these questions and pointed out that businesses outside
the U.S. are turning to cell phone jamming devices (illegal in
the U.S.) to block mobile phone communications in a secured
area. Bennahum writes, "According to the FCC, cell phone jammers
should remain illegal. Since commercial enterprises have
purchased the rights to the spectrum, the argument goes, jamming
their signals is a kind of property theft." Seems to me there
would be obvious benefits in allowing movie houses, theaters,
concert halls, museums, places of worship and secured meeting
locations to suppress such traffic as long as the interference
were clearly posted. No one would be forced to enter the
location if they did not agree with the ban, and I'm sure there
would be some institutions catering to those who actually _like_
sitting next to someone talking on a cell phone in the middle of
a quiet passage at a concert.
Bennahum mentioned another option - this one quite legal even in
the U.S.: cell phone detectors such as the Cellular Activity
Analyzer from NetLine:
http://www.netline.co.il/Netline/CAAdetector.htmThis handheld computer lets you spot unauthorized mobile phones
in your meeting place so that you act accordingly.
Finally, one can create a Faraday cage that blocks radio waves
by lining the secured facility with appropriate materials such
as copper mesh or, more recently, metal-impregnated wood:
http://en.wikipedia.org/wiki/Faraday_cageA high-security version of such a room is called a SCIF
(Sensitive Compartmented Information Facility) in U.S. military
security jargon.