| 摘要 |
A smart card for use in conjunction with a security portal, such as a transit turnstile, a residential access gate, or a parking facility, for performing authentication checks for authorized passage. A print sensor is positioned on each major surface of the card in positions conforming to the natural placement of the thumb and a finger. The print sensors generate print pattern signals which are checked against authentic versions stored in non-volatile memory in the card, using a processor located within the card. The result of the authentication check is communicated to the associated external security portal by an r.f. circuit, which also receives r.f. energy from the external device to provide D.C. power for the circuits internal to the card. The card can be used on-the-fly without the need to stop at the check point, thereby facilitating traffic flow through the check point.
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