An identification tag (100) facilitates use of a secure computer system (300). The tag (100) is adapted to be worn on a user's wrist and includes an identification and registration circuit (102) that includes an identification component (106), an affiliation component (110), and a light-emitting diode...http://www.google.fr/patents/US7230519?utm_source=gb-gplus-shareBrevet US7230519 - RFID tag and method of user verification
