A security apparatus and a method for determining the distance between a computer (72) and a token (70) carried by a user (52) for allowing the user (52) to access the computer (72). The computer (72) is connected to a first transceiver (16) having at least one antenna for emitting and detecting a radio...http://www.google.fr/patents/US6456958?utm_source=gb-gplus-shareBrevet US6456958 - Method for allowing a user access to an electronic device having improved security
Method for allowing a user access to an electronic device having improved ...
