This is reasonably well known, as are some of countermeasures in use: https://en.wikipedia.org/wiki/Tempest_(codename) https://en.wikipedia.org/wiki/Tempest_(c

This is reasonably well known, as are some of countermeasures in use: https://en.wikipedia.org/wiki/Tempest_(codename) https://en.wikipedia.org/wiki/Tempest_(codename)