Patent ID: 8820636

Claim:
Apparatus comprising: a transaction terminal including: at least one reader, wherein the at least one reader includes a card reader, wherein the card reader is operable to read card data usable to identify a financial account, wherein the terminal is usable to conduct a financial transaction involving a financial account identified through use of card data read by the card reader, a user interface, wherein the user interface includes a card entry slot leading toward the card reader, at least one radiation output device adjacent the user interface, wherein the at least one radiation output device is operable to intermittently output radiation, at least one radiation sensor, wherein the at least one radiation sensor is operable to sense radiation output by the at least one radiation output device, at least one processor, wherein the at least one processor is operable to receive at least one signal corresponding to radiation sensed by the at least one radiation sensor, wherein the at least one processor is operable to determine responsive at least in part to the at least one signal received, whether the at least one radiation sensor sensed a predetermined level of radiation while the at least one radiation output device was outputting radiation, wherein the at least one processor is configured to cause responsive at least in part to a positive determination, the terminal take at least one predetermined action that is associated with detection of an unauthorized device adjacent the card entry slot.