What is data emanation?

Answer 1

Emanation is simply something that is emitted or radiated. Data emanation is simply the emission of data via either wired or wireless means. It does not just deal with wireless devices though wireless devices such as wireless mice, bluetooth devices or Wi-Fi are of particular concern. Wired devices can be still be susceptible to data emanation. Techniques such as jamming or blocking electromagnetic radiation using special cages/walls can be used. Most cables are designed to block EMI interference. Though it is meant to keep EMI out instead of in, the basic concept is still sound.