Display frequencies received by radio
TEMPEST isn’t just an esoteric field of espionage that only the upper echelon military branches can use. A rather frivolous program known as “TEMPEST for Eliza” can be used by almost anyone at the comfort of their homes. TEMPEST for Eliza is a quick Linux hack that plays music over the radio of your choosing by displaying alternating black and white pixels on your monitor at just the right frequency. This plays music for the feds pointing their TEMPEST-sniffer antenna at your monitor. If you’re not currently being spied on, you can play the music for yourself using a handheld AM radio.