Honestly a Faraday cage should be a very good defense against most attacks including this one. Moderately expensive for a good quality one, probably only afford

Honestly a Faraday cage should be a very good defense against most attacks including this one. Moderately expensive for a good quality one, probably only affordable for high stakes tournaments (it shouldn't be expensive in terms of materials: a very simple sheet metal cage with adequate electrical connection technique should be enough, but I assume it's too specialized to be cheap -- plus care must be taken with openings and ventilation). Edit: I believe at the moment it's still necessary a fairly large device to run the best engines which can't be concealed (?). Edit2: Oh the engine is running on the Pi 0! Impressive.