If you want to even further back you can look at the side channel attacks shown in person at the CanSecWest conference in 2009 - https://cansecwest.com/csw09/cs

If you want to even further back you can look at the side channel attacks shown in person at the CanSecWest conference in 2009 - https://cansecwest.com/csw09/csw09-barisani-bianco.pdf https://cansecwest.com/csw09/csw09-barisani-bianco.pdf The most interesting part might be the frequency analysis that was done after getting the signal. It was amazing to see the words get decoded in real-time.