Re: @AC
Strange. Side-channel attacks have been front and center for much of my life, even before TEMPEST came along. We pulled off a side-channel attack that, with a bit of social engineering thrown in, allowed us to sneak into range and sink a carrier in a US Navy war game. I expect new ones to be found on a fairly regular basis. That Meltdown and Specter exist is no surprise. It's all about information (energy) leakages and deriving intelligence from that.