Electronic employee identification (ID) has transformed the workplace. Handheld tokens, such as contactless smartcards and wearable clip-on infrared badges, are now fundamental to security practices across the globe. Medium-to-large organizations continually stress the importance of employees carrying their staff cards at all times and displaying them for security purposes. Staff badges have been increasingly linked to physical access control in buildings, dynamic computer log-in, and even for e-payment using stored value. Most employees carry their electronic ID in a plastic sleeve attached to a lanyard, but given the card can be removed, it can be left behind, misplaced, or stolen.