Etherify 4 – jumping air gaps with real ethernet hardware

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Posted by Jacek Lipkowski on Nov 30


Another amusing etherify hack, this time not with raspberry pis, but with
normal laptops.

The implementation is deliberately very primitive (shell scripts, uses
native system tools). The data is transmitted via very slow morse code
(QRSS CW), which can be decoded visually on a spectrogam. This way one can
judge the signal/noise ratio by eye.




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