All electrical equipment gives off signals. Terrorists and other adversaries can collect these signals and glean sensitive information without being detected. This vulnerability exists regardless of any data encryption or network security measures. Here's a reasonable scenario.
Members of a terrorist cell operate simple eavesdropping equipment from inside a minivan parked outside of the FBI field office in Chicago. Without being detected, the adversaries are able to gather antiterrorism information from the PC of a task force agent who diligently closes the window blinds before reading classified reports. The FBI is baffled at how the terrorists remain one step ahead of the government.
API's TEMPEST products have been safeguarding classified and sensitive information for the U.S. Intelligence Community and its allies for over 30 years. APIŽ has earned their reputation as a world leader by providing highly reliable integrated IT solutions; outstanding program management; life-cycle maintenance, support and training; and by joining their customers in a commitment to the success of their mission.
API ANNOUNCES THE LAUNCH OF ITS TEMPEST/EMI/EMC TEST SERVICES DIVISION, Columbia. MD
US Secret Service IT Vendor Fair, Washington, DC
Peterson Air Force Base, Colorado Springs, CO
U.S. Department of State Mobile Computing Forum, Washington, DC