tempest vs lcd was re once tapped douglas craig holland holland cs colostate edu writes with e mail if they can t break your pgp encryption they ll just call up one of their tempest trucks and read the electromagnetic emmisions from your computer or terminal note that measures to protect yourself from tempest surveillance are still classified as far as i know steiner jupiter cse utoledo edu jason think steiner writes are lcd displays vulnerable to tempest i can see high voltage type display devices being vulnerable crts plasma displays etc but jason beat me to this question what about em radiation from low voltage items like lcd displays perhaps the critical element is the driver circuitry the cabling what about a portable pc mac etc where all the noise is bunched into one tiny area
