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by johnnythunder 2192 days ago
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

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.