JP2905496B2 - Data processing method for IC card - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a data processing method for an IC card.

[Prior art] An IC (memory) card is known to be capable of storing a large amount of data, and has an extremely wide application.
For example, in the banking business, it is being used instead of a conventional cash card (magnetic card). The IC card includes a card having a ROM and a RAM backed up by a battery, and a card including an EEPROM.

[Problems to be Solved by the Invention] Such writing of data into an IC card and modification of data are performed for each customer in a bank, for example.

However, when each individual owns a number of IC cards, it would take a lot of time to go to the IC card issuer and rewrite the data in RAM for each IC card one by one. I will.

Therefore, the object of the present invention has solved the above problems.
An object of the present invention is to provide a data processing method for an IC card.

[Means for Solving the Problems] The present invention is a data processing method for an IC card for exchanging data relating to an IC card via a telephone line connected to a telephone, wherein the telephone is connected to the other party via the telephone line. Sending a data change request signal to the information processing means via the telephone line in a state where the information is connected to the information processing means on the side, and transmitting the information via the telephone line in response to the data change request signal. Receiving the data sent from the processing means, overwriting the received data in the storage means in the IC card, and transmitting a checksum based on the received data after the overwriting to the telephone line. Via the telephone line in response to the checksum. Receiving a signal indicating the result of judging the validity of the checksum sent from the stage, and transmitting an end code to the information processing means via the telephone line if the checksum is valid; If the checksum is not valid, the process returns to the receiving step, and receives data transmitted again from the information processing means via the telephone line.

[Operation] According to the present invention, by connecting to an arbitrary data supply source using a telephone line, it is possible to quickly, efficiently and reliably perform data change processing and the like for an arbitrary IC card.

Embodiment FIG. 1 is a block diagram of a data processing device for an IC card to which the present invention is applied, and FIG. 2 is an external view of a telephone incorporating the device.

In FIG. 1, reference numeral 1 denotes a telephone circuit having a telephone function, which is connected to a telephone line via a connector 12.
Reference numeral 3 denotes a CPU that controls the entire apparatus. Telephone circuit 1
Operates alone or under the control of the CPU 3 as a normal telephone (dial operation is performed with the ten keys 5).

4 is a display, 5 is a numeric keypad, and 6 is a function key, which are arranged on a telephone case (see FIG. 2).

Reference numeral 7 denotes a ROM storing a control program for the CPU 3, reference numeral 8 denotes a RAM having a temporary storage area for data, reference numeral 9 denotes a backup battery for the RAM 8, and reference numeral 10 denotes a driver of the display unit 4.

Reference numeral 11 denotes a serial I / F, which is connected to a telephone line via a connector 12, and exchanges data with an external device via the telephone line. Reference numeral 13 denotes a connector for connecting an IC card.

The components 1, 3, 5, 6, 7, 8, 10, 11, and 13 are connected on a bus 14 of the CPU.

Reference numeral 2 denotes an IC card electrically connected to the connector 13, and a ROM that stores a program or the like corresponding to a use.
15, a RAM 16 having a data storage area and a battery 17 for backing up the RAM 16. In addition, IC card 2
Of the telephone case as shown in FIG.

FIG. 3 shows the apparatus 100 configured as described above and a host computer (HC) 200 used when changing data in an IC card.
Shows a connection mode, where 300 is an exchange, and 400 is NTT
The telephone line network 500 indicates a telephone or main unit to which the HC is connected.

Next, an operation at the time of changing data in the IC card 2 connected to the present apparatus will be described with reference to the flowchart of FIG.

First, the IC card 2 is pushed in from the insertion slot on the front part of the telephone (FIG. 2), and the IC 13 is inserted into the connector 13 of the data processing apparatus.
Connect card 2. Off-hook the handset of the telephone, and then use the numeric keypad 5 to activate the telephone 500 on the HC 200
Call. The operation is started by pressing the data reading key among the function keys 6. This device 100
Waiting for the connection between the telephone and the called telephone 500 (S1), and pressing the numeric key 5 or the function key 6, the CP
U3 sends a predetermined data change request signal according to the data change program written in ROM 7 to HC 200 via serial I / F 11, modem 19 and connector 12 (S
2).

In response, the HC 200 sends the changed data to the device 100 (S3). On the device 100 side, the CPU 3 transmits the changed data from the HC 200 to the connector 12, the modem 19, the serial I / F 11
Overwriting the address of the corresponding data in the RAM 16 (S4). Next, the CPU 3 sends a checksum or the like to the HC 200 to confirm the reception status of the data received from the HC 200, and the HC 200 receives this (S5).

Next, the HC 200 determines the validity of the received checksum (S7), proceeds to S8 if normal, and returns to S3 if abnormal. In S8, the HC 200 sends an end code to the device 100 and ends.

As described above, by inserting the IC card whose data is to be changed and having the data to be changed sent from the corresponding HC or the like using the telephone line, the data of the IC card can be easily changed.

[Effects of the Invention] As described above, according to the present invention, in a data processing method for an IC card for transmitting and receiving data relating to an IC card via a telephone line connected to the telephone, the telephone changes the data change request signal. And send the data
Overwrites the storage means in the IC card, sends a checksum, receives a signal indicating the result of judging the validity of the checksum, and sends an end code if the checksum is valid. If it is not valid, it performs an inseparable and efficient process of receiving the retransmitted data, while the validity of the checksum is determined by the information processing means of the other party connected via the telephone line This makes it possible to perform a series of continuous quick and efficient processing on an IC card. For example, using a telephone line to receive data from multiple change programs and data and other sources,
The program and data in the card can be changed and the like very easily.

[Brief description of the drawings]

1 is a block diagram of one embodiment of the present invention, FIG. 2 is an external view of the embodiment, FIG. 3 is a diagram showing a connection state between the embodiment and a host computer, and FIG. 4 is a diagram of the embodiment. It is an operation flowchart.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04M 11/00-11/10 G06K 17/00

Claims (1)

(57) [Claims] 1. An IC card data processing method for exchanging data relating to an IC card via a telephone line connected to a telephone, wherein the telephone is connected to information processing means on the other side via the telephone line. Sending a data change request signal to the information processing means via the telephone line in a state where the data is transmitted from the information processing means via the telephone line in response to the data change request signal. Receiving the received data, overwriting the received data in the storage means in the IC card, and after the overwriting is completed, transmitting a checksum based on the received data to the information processing means via the telephone line. Sending, and before sending from the information processing means via the telephone line in response to the checksum. A signal indicating the result of determining the validity of the checksum is received, and if the checksum is valid, an end code is sent to the information processing means via the telephone line, and if the checksum is not valid. Returning to the receiving step and receiving data transmitted again from the information processing means via the telephone line.