Patent ID: 6307471
Filing Date: 2001-10-23
Classification: G06F,G07C

Abstract:
A method of detecting a signal between a token and an electronic device for authorizing a user to access the electronic device, said method comprising the steps of;emitting a signal (10, 10') containing data from at least one of a token (12) and an electronic device (14),detecting the same signal (10, 10') with each of a first plurality of antennas (18, 18') disposed within the other of the token (12) and the electronic device (14),measuring the strength of the same signal (10, 10') detected at each of the first plurality of antennas (18, 18') with a measurement device (20, 20'),sensing the maximum signal strength detected by any of the first plurality of antennas (18, 18'), andenabling the electronic device (14) to allow the user access in response to the maximum signal strength being above an operational threshold to overcome variances in signal strength in response to relative movement between the token (12) and the electronic device (14) to remain enabled so long as at least one antenna (18, 18') detects the same signal (10, 10') and measures the maximum signal strength above the operational threshold.