|
Few
people are fully aware of the threats of remote
eavesdropping through window glass. Some of these
methods are effective at distances up to or beyond a
quarter mile. Proven eavesdropping methods are:
· Recording
meetings and conversations using laser microphones
· Recording
radio frequency emissions and the electromagnetic energy
that leaks from computers, printers, facsimiles,
cellular telephones, and other electronic devices.
· Capturing
infra-red signals from wireless PDA’s, laptops and IR
communication systems.
Capturing and translating optical bandwidth that
emanates from computer displays to reconstruct the
entire image on the monitor
|
Wireless networks - Washington DC
An example of RF emanations in an office environment |
A recent (May 2005) GAO report concerning wireless
security disclosed gaining access to over 1,000 wireless
networks with in a 15 block area in Washington DC with
just a common network scanner! Significant "signal
leakage" (wireless network signals traveling beyond an
organization's perimeter) allowed for unauthorized users
to monitor, check security configurations, and
eavesdrop.
Signal leakage can be stopped by deploying SpyGuard
Technology. Applied to the walls and glass fenestrations
of the building, SpyGuard offers upward of 50dB
attenuation to the wireless network signal.
By making wireless signals inaccessible, any miscues
with respect to encryption, authentication, VPN and
firewall rules are protected until they can be
corrected.
|
