Looks a lot like what three letter agencies do.
https://www.fbo.gov/utils/view?id=b57e21927491771f3b89821bfb41c507
https://en.wikipedia.org/wiki/Tempest_(codename)
https://securityledger.com/2015/08/...using-power-analysis-to-spot-iot-compromises/
https://www.fbo.gov/utils/view?id=b57e21927491771f3b89821bfb41c507
https://en.wikipedia.org/wiki/Tempest_(codename)
https://securityledger.com/2015/08/...using-power-analysis-to-spot-iot-compromises/