In the US: classified information concerning, or derived from, intelligence sources, methods or analytical processes, which may be handled only within formal access control systems.
Definition based on the 2009 ODNI guide. Such information is stored, discussed and processed in accredited facilities known as SCIFs.1
Sources
- Office of the Director of National Intelligence (USA), National Intelligence: A Consumer’s Guide, April 2009
Checked: 3 November 2026