JPH03134805A - Magnetic card device - Google Patents

Abstract

PURPOSE:To attain the reading of data even if a part of the data of the card is broken down by dividing a data memory part into >=3 regions, dividing and reproducing the data recorded in the data memory part and recording the data in the state in which the data varies with each of the regions and that the same data is not inputted within one region. CONSTITUTION:The writing data 15 is first divided to the three data blocks 151 to 153, is reproduced and is distributed in the three regions 201 to 203 in the case in which a card read/write device 11 writes the data on the magnetic card 13. The respectively two blocks are distributed to the regions 201 to 203 at this time and the superposition of the same blocks in the respective regions is averted. A start code 31, an end code 33 and an error detection cord 34 are added to the respective regions and are recorded in the data memory parts 141 to 143 of the magnetic card 13. Thus, the reading out of the entire data is possible even when the card is flawed and a part of the data is broken down.

Description

[Detailed description of the invention] Industrial applications The present invention is a prepaid card and a cash card.

The present invention relates to a magnetic card device used for credit cards and the like.

Conventional technology The configuration of a conventional magnetic card device is shown in FIG. 4, for example.

The configuration was as shown in FIG. In Figure 4, 4
1 is a card read/write device, 42 is a magnetic head, 43
is a card body, 44 is a data storage section, and 45 is data recorded in the data storage section. In the configuration shown in FIG. 4, the data 42 is recorded, for example, in the format shown in FIG. In FIG. 3, 31 is a start code indicating the start of data, 32 is data, 33 is an end code indicating the end of data, and 34 is an error detection code for checking whether the read data is correct.

The procedure for the card read/write device 41 having the configuration shown in FIG. 4 to read data 45 recorded in the formant shown in FIG. 3 will be described below.

When a card 43 is inserted in the card read/write device 41, the data storage section 44 runs in contact with the magnetic head 42, and the data 45 stored in the data storage section 44 is reproduced by the magnetic head 42.

At this time, the data 45 is 31.32.333...- in Fig. 3.
7 to 34, the card read/write device 41 detects the start of the data based on the start code 31, starts reading and storing the data 32, and ends the data storage when the end code 33 is detected. Error detection code 3
Read 4. Next, the card read/write device 41 calculates an error detection code from the stored data 32, and calculates the error detection code 34 stored in the data 45 of the card.
The read data is checked to see if it is correct by comparing it with the data 46, and if the result of the comparison is correct, the reading of the data 46 is completed.

Further, in FIG. 5, 51 is a card read/write device, 62 is a magnetic head, 63 is a card body, 5jLl, 5
Reference numeral 42 indicates a data storage section, and 56 indicates data recorded in the data storage section. Exactly the same data 65 is recorded in the data recording sections 541 and 542 in the format shown in FIG. 3.

With the configuration shown in FIG. 5, the card read/write device 51 reads data 6.
The procedure for reading 6'fc is to repeat the procedure shown in FIG. If it can be read, the read/write is completed normally.

Problems to be Solved by the Invention In such a conventional magnetic card device, in the case of the configuration shown in FIG. 4, if the data storage section of the card is damaged and part of the data is destroyed, the data becomes completely unreadable. There was an ode to the unreliability of cards.

In addition, in the case of the configuration shown in Figure 6, since the duplicated data is stored in two areas, it is possible to read and write data even if part of the data is destroyed, but when used as a prepaid card, the 6 As shown in figure 6, cut out one side of the data storage section 641 to use the card.
), when the amount is subtracted and the card becomes unusable, the data storage section 542 is cut off and the data storage section 541 is reattached and used (62), which makes the card less secure. There was a revelation.

Means for Solving the Problems The present invention divides the data storage section of a magnetic card into at least three areas, and divides the data recorded in the data storage section into at least three areas from first to third. In this configuration, the first to third data are duplicated and different for each area, and the same data is not input within one area.

Function: With this configuration, even if a part of the data on the card is destroyed, the data can be read, and furthermore, it is possible to prevent alterations such as cutting and pasting.

Embodiment FIG. 1 shows the configuration of a magnetic card device according to an embodiment of the present invention, in which 11 is a card read/write device, 12 is a magnetic head, 13 is a card body, 141°ff 42 , 14
3 is a data storage section, and 151, 152 and 153 are data recorded in the data storage section.

Data recording of a magnetic card device having the following configuration,
The reading procedure will be explained with reference to the drawings.

FIG. 2 shows the data division and combination procedure in this embodiment.

In FIG. 2, 151, 152, and 153 are data having the same meaning as in FIG.

When the card read/write device 11 writes data to the magnetic card 13, the write data 15 is first written to 151, 15.
Divide into three data blocks of 2,153 (Step A
). Next, in step B) to duplicate the data, three areas 201
．． 202.203 (Step C). At this time, two data blocks are distributed to each of the areas 201, 202, and 203, and the same data blocks do not overlap in each area. Next, in each area 231, 232, 233, a start code 31 indicating the start of the data shown in FIG. The error detection code 34 is added and recorded in the data storage sections 141, 142, 143 of the magnetic card 13 (step D).

When the card read/write device 11 reads the magnetic card 13 recorded in the above procedure, each of the four areas 141, 1
The original data 16 is obtained by reading 42 and 143 independently, extracting data 151, 152□153 from an arbitrary area, and combining them.

Next, we will explain the reading procedure when the card is damaged and some of the data is destroyed.

Taking as an example a case where the data storage section 143 is destroyed, the card read/write device 11 is damaged.
However, data 161 and 152 can be obtained from the data storage section 141, and data 152 and 153 can be obtained from the data storage section 142, so all data 151, 152, and 153 can be read. becomes possible.

Furthermore, if an attempt is made to alter the card by cutting and pasting υ, for example, if the data storage section 143 is cut out, data can be read in the remaining data storage sections 141 and 142, but if the data storage section 143 alone Since only 151 and 153 can be taken out, it is impossible to read the data.

Furthermore, by performing data disturbance processing and encryption processing for each data storage unit 141, 142, and 143, data analysis is prevented, and a portion of all data 15 is used as an authentication code to inspect GRG, LRG, etc. Calculate and record the code,
By making the system so that the authentication code is inspected after all data 151, 152, and 153 are taken out during reading, if one of the data storage sections is cut and pasted or forged, the authentication code will not be detected. Since the verification results are different, the card can be rejected as a fraudulent card.

Still, in the above embodiment, the number of magnetic heads is one and the magnetic data recording area of one track is divided into three areas, but for example, the number of magnetic heads is three and the number of magnetic data tracks is also three. By using a tree, it is possible to have a configuration in which all data can be read if two out of three tracks can be read.

9B-7 Furthermore, in the above embodiment, the data and the data storage section are divided into three areas, but a configuration in which the data and the data storage section are divided into four or more areas is also possible.

For example, if the data and data storage section are divided into five areas, if three to four areas can be read at the time of data reading, all the data can be read.

In addition, in the above embodiment, all data 15 was duplicated, but
For example, if you copy only important data, such as monetary data, and then divide and store all the data in the data storage section, you can increase the data storage capacity, and even if the card gets scratched, only the important data can be saved. Can be reproduced.

Effects of the Invention As described above, according to the present invention, the data storage section of a magnetic card is divided into at least three areas, and the data recorded in the data storage section is divided into at least three areas from the first to the third areas. In addition to dividing the data into the above data, the first to third data are duplicated, and the IQ is different for each area, but the IQ is the same within one area.

By configuring the card to record without data being input, even if the card is scratched in at least one place and part of the data is destroyed, all data can be read.
In addition, since we can provide a magnetic card device that is difficult to tamper with, such as cutting, pasting, altering, and counterfeiting, it is possible to simultaneously achieve high reading reliability and high security when using the card device in an unmanned outdoor environment, such as in a prepaid card system. .

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a magnetic card device according to an embodiment of the present invention, Fig. 2 is a schematic diagram showing the procedure for dividing and combining data in the same embodiment, and Fig. 3 is a diagram showing the format of a data storage unit. The schematic diagram, FIGS. 4 and 6 are block diagrams of a conventional magnetic card device, and FIG. 6:d is a schematic diagram showing an example of a card alteration procedure in a conventional magnetic card device. 11.41.51...Card read/write device, 1
2.42.52 ... Magnetic head, 13, 435
3...Magnetic card body, 22.23.24...1
1,,7 Data division 9 combination procedure, 31...Start code, 32...Data, 33...End code, 34...Error detection code, 44,141
, 142° 143.541, 542...Data storage section, 45° 55.151 . 152,153...
data.

Claims (1)

[Claims] The card body includes a card body and a data storage section provided in the card body, the data storage section is divided into at least three areas, and the data recorded in the data storage section is divided into first to third areas. A magnetic field characterized in that the data is divided into at least three or more pieces of data, the first to third data are duplicated, and each area is different, and the same data is not input in one area. card device.