JPH0756670B2 - Magnetic recording card and data recording method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a technology for preventing forgery of a magnetic card, and more particularly to a magnetic recording card using both ordinary magnetic data recording and magnetic data pattern-printed magnetic data recording. Regarding the data recording method.

[Technical background]

In recent years, so-called magnetic cards that magnetically record data have appeared on the market. There are two types of magnetic cards, one that identifies the user based on a personal identification number such as a cash card, and one that does not identify the user, such as a telephone card that has become very popular recently. is there.

Here, the former cannot be used as it is even if the card is forged because it has a personal identification number, but since the latter does not use the personal identification number, there is a high possibility that a counterfeit card by duplication will appear.

Therefore, various anti-counterfeit measures have been conventionally adopted. The first is the method of using a personal identification number, but this does not work unless the user is specified.

The second method is a method of embedding a special element other than magnetic data so as not to be visible in the card and making a true / false decision by detecting the presence / absence of this special element, but it has a drawback that the existence of the special element is easily detected. The third method is to provide a visually recognizable record, for example, a special pattern by fine lines, printing of special characters, a hologram, etc., but this is effective for humans, but it is difficult for a machine to identify it. Part 4
Is a method of writing using a certain algorithm when writing data, but this is also useless for duplication of magnetic data. No. 5 is a method in which the magnetic recording layer is composed of a plurality of magnetic layers having different properties so that the magnetic recording layer cannot be read out without using a special device, but the number of magnetic materials having different properties is small and can be easily detected. .

[Object of the Invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a magnetic recording card that cannot be easily forged and a data recording method thereof.

[Outline of Invention]

To achieve this object, in the present invention, a pattern printing with magnetic ink is provided on any portion other than the ordinary magnetic data recording portion of the card, and machine-readable card-specific data is recorded on this printing portion. Provided is a magnetic recording card for recording security data, which is formed from card-specific data and variable data to be recorded in a normal magnetic data recording section according to a predetermined algorithm, in the magnetic recording section, and a data recording method thereof.

〔Example〕

 Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 (A) and 1 (B) show the shape of the magnetic card according to the present invention. FIG. 1 (A) shows the front side and FIG. 1 (B) shows the back side. In FIG. 1, reference numeral 1 is a magnetic card, and a magnetic recording portion 2 is provided along the longitudinal direction in the upper center portion on the front side, and a timing mark 3 and card-specific data are provided along the longitudinal direction in the lower central portion on the back side. The pattern printing and recording portion made of the magnetic ink and formed of the mark 4 is provided by the concealing layer 5 so as not to be visible. In FIG. 1, the pattern printing and recording portion made of magnetic ink and the magnetic recording portion 2 are arranged on the opposite sides of the card, but they may be on the same side.

The magnetic recording unit 2 is a magnetic stripe in a general magnetic card, and records variable data such as an amount of money and security data described later. The pattern printing / recording portion using magnetic ink is composed of two types of marks, that is, a timing mark 3 and a card-specific data mark 4, and these data are recorded by being printed using magnetic ink.

Examples of the magnetic ink include butyral resin, vinyl chloride / vinyl acetate copolymer resin, urethane resin, polyester resin, cellulose resin, acrylic resin, styrene /
A synthetic resin such as a maleic acid polymerization resin is used as a binder resin, and if necessary, a rubber-based resin such as nitrile rubber or a urethane elastomer is added, and as a magnetic material, for example, γ-Fe
₂ O ₃ , Co-containing Fe ₂ O ₃ , Fe ₃ O ₄ , barium ferrite, strontium ferrite, Co / Ni / Fe / Cr alone or alloy, rare earth Co magnetic material, CrO ₂ , MNAl, etc. are appropriately selected. In addition to the binder resin and magnetic material described above, a surfactant, a silane coupling agent, a plasticizer, a wax, a silicone oil, carbon and other pigments are added as necessary, and the mixture is treated with a three-roll mill, a sand mill, a ball mill or the like. What was kneaded and created can be used.

As shown in FIG. 2, the hiding layer 5 is an ink having a high hiding property, that is, a white ink, which makes the marks on the timing marks 3 and the card-specific data marks 4 invisible.
It is formed by a general printing method using black ink, gold ink, silver ink, or the like. Further, as shown in FIG. 3, a dummy mark printing layer 6 having a uniform surface at least in part with the timing mark 3 and the unique data 4 is provided by using the same color ink as the magnetic ink, and then the printing layer 6 and the mark are formed. 3, a layer 6 is provided on the mark 4, and a masking layer 5 is provided by using an ink for masking the mark 3 and the mark 4;
It is also possible to provide a pattern layer 7 such as a tint block on the top.

As a result, the mark 4 and the timing mark 3 of the card-specific data made of magnetic ink are not visually recognized, and therefore the existence of these marks is not clearly recognized. The mark can be read by detecting it with a general magnetic head or a hall sensor.

FIGS. 4A and 4B conceptually show the flow of data in writing data in the magnetic recording unit 2 of the magnetic card 1 and reading data from the magnetic card 1.

As an example, when writing to a magnetic card, as shown in FIG. 4, the card specific data read from the marks 3 and 4 recorded in the mark recording portion of the card according to the present invention and new data First, the variable data to be recorded in the magnetic recording unit is converted into security data according to a predetermined algorithm and then written in the security data recording unit of the magnetic recording unit 2, and the variable data is written in the magnetic recording unit 2 as it is.

Then, as shown in FIG. 4B, the variable data out of the data read from the magnetic recording unit is secured according to a predetermined algorithm together with the card unique data read from the mark recording unit. It is converted into data and collated with the security data read from the magnetic card. This determines whether the read magnetic card is pass or fail.

FIG. 5 shows the structure of a magnetic card reader / writer for writing data to and reading data from the magnetic card shown in FIGS. 4 (A) and 4 (B). In the figure, 10 is the magnetic recording unit 2 of the magnetic card 1.
It is a magnetic read / write unit for writing data to and reading data from the magnetic recording unit 2, and has a magnetic write head 11, a magnetic read head 12, a magnetic data write circuit 13, and a magnetic data read circuit 14. Reference numeral 20 is a card-specific data reading section, which has a magnetic writing head 21, a magnetic reading head 22, and a unique data reading circuit 23. Further, 30 is an MPU unit composed of, for example, a microprocessor, and 40 is an external device.

When writing to a magnetic card with this magnetic card reader / writer, the unique data of the card is first written to the unique data reading unit.
Read at 20. That is, the timing mark 3 and the card-specific data mark 4 printed with magnetic ink are entirely magnetized in a certain direction by the magnetic writing head 21, and then the mark signal is detected by the magnetic reading head 22 and is passed through the unique data reading circuit 23. Given to MPU30.

Further, the magnetic read head 12 of the magnetic read / write unit 10 reads the variable data from the magnetic recording unit 2, the MPU unit 30 receives a signal from an external device such as a telephone, and creates new variable data to be written. Security data is created by the MPU unit 30 from the read card-specific data and the variable data. Then, the variable data and the security data to be newly written are written in the magnetic recording unit 2 of the card by the magnetic writing head 11.

When a magnetic card on which data is written in this way is placed on a magnetic card reader / writer for making a call, for example, the card is sent in the scanning direction by a scanning mechanism (not shown) and the magnetic read head 12 of the magnetic read / write unit 10 is read. Both variable data and security data are read by
It is given to the MPU unit 30 via the magnetic data circuit 14.

On the other hand, in the unique data reading device section 20, the timing mark 3 and the card unique data mark 4 printed with magnetic ink are entirely magnetized by the magnetic head 21, and the magnetic reading head 22 detects the mark signal. Then, the mark signal is given to the MPU unit 30 via the unique data circuit 23.

In the MPU unit 30, the variable data and the unique data read from the magnetic card are converted into security data by the MPU unit 30 according to a predetermined algorithm, and the security data read from the magnetic card is also given to the MPU unit 30. The MPU unit 30 collates the security data obtained by the conversion with the read security data and produces a pass or fail output depending on whether or not the two match.

If it is a pass, in the case of a telephone, a signal of permission for use is output, and a new variable data obtained by subtracting from the initial variable data by obtaining a signal according to the telephone usage amount is used as the magnetic recording unit of the magnetic card 1. Write to 2. Writing is as described above. If it fails, it outputs a telephone unusable signal.

[Modification]

In the above embodiment, the card-specific data is given by the timing mark and the mark corresponding to it, but the same effect can be obtained even with so-called magnetic bar code and MICR character due to the size of the bar width and the space of magnetic ink. To be Printing of card-specific data with these magnetic inks can be easily performed by using a number machine.

〔The invention's effect〕

As described above, the present invention provides a pattern printing section using magnetic ink hidden invisible on a magnetic card in which variable data is recorded in the magnetic recording section, and card-specific data is recorded in this printing section. Since the security data created from the unique data and the variable data is recorded in the magnetic recording unit, it is possible to provide a magnetic card that is difficult to forge.

That is, forgery is most easily duplicated, but
The card-specific data mark cannot be visually identified, and it is difficult to find where and how it is contained.

Therefore, even if the data recorded in the magnetic recording unit 2 is copied as it is to create a card, if the card-specific data is different, the security data does not match and the counterfeit card can be easily detected.

As a result, it is most effective for counterfeiting a kind of cash voucher, such as a telephone card, as well as an ordinary credit card, a bank or a card, which does not have a personal identification number and cannot identify a user.

Further, in the present invention, since the security data created from the card unique data and the variable data is also variable data, it is difficult to forge the data in the card and the card itself carries the information for card identification. Since there is no load on the magnetic card reader / writer side, there is no need to specify the device to be used, and the magnetic card reader / writer can be used freely.

[Brief description of drawings]

1 (A) and 1 (B) are a plan view of the front surface and a plan view of the back surface showing the shape of the magnetic card according to the present invention, and FIGS. 2 and 3 are pattern prints of the magnetic ink of the card. It is sectional drawing which shows a structure. 4 (A) and 4 (B) are conceptual diagrams for explaining each operation of writing and reading various data to / from the card, and FIG. 5 shows the operation shown in FIGS. 4 (A) and 4 (B). It is a block diagram which shows the structure of the magnetic card reader writer for performing. 1 …… Magnetic card 2 …… Magnetic recording part 3 …… Timing mark 4 …… Card unique data mark 5 …… Hiding layer 6 …… Dummy mark printing layer of the same color as magnetic ink 7 …… Design layer 11,21 …… Magnetic write head 12,22 ... Magnetic read head

Claims (2)

[Claims] 1. A magnetic recording portion on a card surface and a pattern printing portion made of magnetic ink, which is separate from the magnetic recording portion and is invisible and concealed, are provided. The magnetic recording unit has a predetermined data recording unit consisting of variable data and fixed data that changes according to the use of the card, and a security data recording unit formed from the variable data and the card unique date. A magnetic recording card having. 2. A data recording method of a magnetic card having a magnetic recording portion on a card surface and a pattern printing recording portion using magnetic ink, wherein card-specific data is recorded on the pattern printing recording portion using magnetic ink, and the magnetic recording is performed. Variable data is recorded in a section, card-specific data read from the pattern printing section, and variable data recorded in the magnetic recording section to form security data according to a predetermined algorithm, and the security data is recorded in the magnetic recording section. A method for recording data on a magnetic card, characterized by recording.