Subj : RE: Hacking Ethernet Over Powerline
To   : poindexter FORTRAN
From : debian
Date : Mon Jan 15 2024 19:26:09

On top of that, you would need to know the method of modulation. Is it AM, FM, PM, QAM, SSB? If memory serves, the Ethernet protocol uses PM - the phase of the signal changes when there is a state change. 0 is 0 degrees, 1 is 180.  

Comm speed will determine bandwidth and frequency. I believe that the bandwidth required for Ethernet exceeds that of what most amateur receivers can do, but SDRs should be able to receive that - though their price increases of course. 

Sounds like you are leaning towards TEMPEST in a way. But again, this would only work in low or no noise environments. If there are a bunch of devices drawing power, that will make it much more difficult to differentiate between the other devices and Ethernet activity. 

But - once you iknow what to look for, it is easier to see the signal through the noise. 

-Debian 

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