IC card system
First Claim
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1. In an IC card system for identifying the validity of an IC card device having at least one integrated circuit (IC) chip, when the IC card device is connected to an external device, the improvement wherein said IC card device comprises:
- first memory means contained in said IC card device for storing first identification data of a predetermined number of characters;
input means for inputting second identification data of a predetermined number of characters;
first comparing means for comparing said second identification data, as inputted by said input means, with said first identification data prestored in said first memory means in said IC card device;
output means for outputting the results of the comparison by said first comparing means;
connection terminal means for electrical connection to said external device;
detecting means for detecting the connection state of said IC card device with said external device;
second memory means for storing third identification data for identifying said external device and said IC card device;
transferring means for automatically transferring said third identification data stored in said second memory means to said external device via said connection terminal means; and
control means for controlling said transferring means in accordance with the detection state of said detecting means.
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Abstract
An IC card is inserted in an IC card terminal. Under this condition, the PAN data read out from the IC card is compared with the decrypted PAN data for identification purposes. Then, the IC card is removed from the terminal. The PIN data input to the IC card is compared with the PIN data prestored in the IC card. The results of the comparison are used to identify the validity of the IC card, the terminal, and the card owner.
66 Citations
18 Claims
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1. In an IC card system for identifying the validity of an IC card device having at least one integrated circuit (IC) chip, when the IC card device is connected to an external device, the improvement wherein said IC card device comprises:
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first memory means contained in said IC card device for storing first identification data of a predetermined number of characters; input means for inputting second identification data of a predetermined number of characters; first comparing means for comparing said second identification data, as inputted by said input means, with said first identification data prestored in said first memory means in said IC card device; output means for outputting the results of the comparison by said first comparing means; connection terminal means for electrical connection to said external device; detecting means for detecting the connection state of said IC card device with said external device; second memory means for storing third identification data for identifying said external device and said IC card device; transferring means for automatically transferring said third identification data stored in said second memory means to said external device via said connection terminal means; and control means for controlling said transferring means in accordance with the detection state of said detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating an IC card system which includes an integrated circuit (IC) card device having at least a keyboard and a display, and an external device having at least an insertion portion to insert said IC card device for communication of said IC card device with said external device, the method comprising:
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inserting said IC card device into said insertion portion of said external device; transferring first identification data into said external device from said IC card device; identifying said IC card device with said external device in accordance with said first identification data; inputting second identification data into said IC card device by said keyboard while said IC card device is disconnected from said external device; and comparing said second identification data inputted by said keyboard with third identification data prestored in said IC card device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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11. The method of claim 19, further including:
displaying the result of said comparison step, to thereby indicate whether said external device, said IC card device and a card holder are authorized or not.
Specification