A method and apparatus for identifying an individual holder (person) of an unalterable charge card-like device (CARD) at a utilization terminal (U/I Terminal) wherein a unique user entered key (asserted key K.sub.A) is handled in a highly secure manner. The holder of the CARD causes same to be placed...http://www.google.com.au/patents/US4295039?utm_source=gb-gplus-sharePatent US4295039 - Method and apparatus for achieving secure password verification
