An information barrier for determining whether a person is concealing a dangerous weapon without exposing any sensitive or private information about the subject is disclosed. Within an enclosure, detector means obtain images of individuals, including images of concealed dangerous items, and output the images. Computing means receive the images for separating the concealed dangerous items from the personal image, and output a signal if an image of the concealed dangerous items is located, and display means output a non-sensitive indication of whether the concealed dangerous items have been detected.
 The present invention generally relates to security technology, and more specifically to an information barrier that protects the personal information related to a subject during a security check. This invention was made with Government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.