Has any of you thought about a way to detect physical eavesdropping,
at cable level.
It occurred to me that even if you don't share UTP cables, and you
switch Ethernet traffic, ... someone can always cut a cable open and
monitor (part of) your network activity with crocodile clips (and
quite possibly hide a recording device somewhere in the ceiling or
I suppose this would introduce some noise in the signal. It would
anyway incur a signal drop of 3 dB and maybe also cause a rise in BER
if the signal is already weak but I'm not going to place an
oscilloscope on my LAN to monitor that kind of things. The cost would
be prohibitive and it would be unpractical to say the least.
So how would you tackle this problem if physical eavesdropping was a
threat to you? Are there any 100-TX Ethernet cards that have a signal
gain register or something? If so, I could hack a driver to
automatically detect electrical anomalies on the network, which would
at least partially solve the problem.
6. grep query