Importance

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Abstract

A method and system for generating a unique security access key value for a radio frequency (RF) card are provided so that different kinds of RF cards issued by different companies can be read using a single card terminal in order to collect charge for the use of the RF cards. The system includes a card issuing unit, which reads a chip serial number from an empty RF card, performs an operation on the chip serial number according to a predetermined algorithm to generate a security access key value, and encodes the security access key value into the empty RF card; an RF card, which is activated by a radio frequency radiated from a card terminal, and when the RF card receives the same security access key value as that it has from the card terminal, transmits information recorded in its memory area to the card terminal in order to pay charge for the use of the RF card; and a card terminal, which receives a chip serial number from an RF card activated by a radio frequency radiated from an antenna of the card terminal, performs an operation on the chip serial number according to the predetermined algorithm the same as that used by the card issuing unit so as to generate a security access key value, and accesses the memory area of the RF card using the generated security access key value in order to collect charge for the use of the RF card.

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First Claim