Tesco tests spy chip technology
July 21, 2003 | Source: The Guardian
Supermarket chain Tesco has admitted testing controversial technology that tracks customers buying certain products through its stores.
RFID tags in razor blades trigger a CCTV camera when a packet is removed from the shelf. A second camera takes a picture at the checkout and security staff then compare the two images, raising the possibility that they could be used to prevent theft.