Interesting project but I wonder if this is mostly academic. Wheatstone bridges are very sensitive to tampering. While the reflectometry is pretty cool I wonder if for practical purposes the extra sensitivity is needed for physical intrusion detection. While 10€ may not be much for securing a payment terminal a wheatstone bridge is a lot cheaper.

Enjoyed the paper, thanks.

While there was brief discussion about environmental influence due to temperature and environmental EMI, it would be nice to get an idea of how this approach compares with regards to radiated emissions.

Fast edges and their wide spectral content are one of the earliest things to minimise/eliminate as part of compliance testing - other approaches aren't as active of an aggressor so getting to production may not be as easy given the stated goals for low cost/effort implementation.

The frequency domain data from the MXA shows the output during edge measurement, but there's no discussion about measuring how much these tones leak...