Abstract: A security system (20) includes at least one camera (22) that provides a reference image regarding an area within a field of vision (24) of the camera (22). A controller (30) determines whether a difference between at least a portion of a test image obtained by the camera (22) and a corresponding portion of the reference image indicates tampering with the camera. Disclosed examples detect a variety of tampering conditions and provide an indication of camera tampering so that corrective or preventative measures may be taken.

Abstract: A card reader housing has an exterior surface configuration that includes a plurality of distinct surface portions (24-38) aligned at oblique angles relative to each other. The exterior surface configuration (22) prevents the placement of a skimming reader over the top of the card reader housing (20). In a disclosed example, a finger-receiving notch (50) is directly aligned with a reader (60) and has a depth and a dimension sized for receiving at least a portion of a finger holding a card inserted into a slot (46) in the housing (20). Any alteration of the notch (50) dimensions prevents proper operation of the card reader.