JPS62222430A - Magnetic recording card and its data recording method - Google Patents

Abstract

PURPOSE:To prevent the forgery of a magnetic card, by providing a pattern printing part printed with magnetic ink on the magnetic card,on the magnetic recording part of which a variable data is recorded, and recording a proper data on the printing part. CONSTITUTION:A magnetic recording part 2 is provided on the surface side of a magnetic card 1 along a longitudinal direction, and on the rear side, a pattern printing and recording part printed with the magnetic ink consisting of a timing mark 3, and a mark 4 proper to the card is provided invisually with a soft magnetic layer 5. At the recording part 2, the variable data, such as an amount, etc., and a security data, are recorded. The layer 5 is provided on the marks 3 and 4 so as not to see the marks 3 and 4 visually, and to hide the data magnetically. Therefore, the marks 3 and 4 are not able to be read by an ordinary reader, and it is impossible to detect the content of the data. So, the security data is not coincided even when the copying of the data recorded on the recording part 2 is performed as it is, thereby, the forgery being detected.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a technology for preventing counterfeiting of magnetic cards, and in particular to a magnetic recording card that uses a combination of ordinary magnetic data recording and magnetic data recording printed with matrix ink. and its data recording method.

[Technical background]

In recent years, so-called magnetic cards on which data is recorded magnetically have been on the market. There are two types of magnetic cards: those that identify the user using a pin number, such as cash cards, and those that do not identify the user, such as telephone cards, which have recently become popular. be.

Here, since the former has a PIN number, even if the card is forged, it cannot be used as is, but the latter does not use a PIN, so there is a high possibility that counterfeit cards due to duplication will become available.

Various anti-counterfeiting measures have been taken in the past, one of which is
This method uses a PIN number.

This will not be effective unless the user is identified.

The second method is to embed a special element other than magnetic data in a card so that it cannot be seen, and then detect the presence or absence of this special element (this method is used to determine authenticity), but the drawback is that it is easy to detect the presence of the special element. be.

The third method is to provide a visually visible record, such as a special pattern using fine lines, printing of special characters, or a hologram, but while this is effective for humans, it is difficult for machines to identify it. The fourth method is to use a certain algorithm when writing data, but this method is also ineffective for duplicating random data.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and aims to provide a mountain record card that cannot be easily forged and a data recording method thereof.

[Summary of the Invention] To achieve this objective, the present invention provides magnetic ink that is magnetically hidden and hidden from view by a soft magnetic material layer in any part of the card other than the normal magnetic data recording area. machine-readable card-specific data is recorded on this printing section, and security data is formed according to a predetermined algorithm from this card-specific data and variable data recorded on a normal magnetic data recording section. The present invention provides a magnetic recording card that records data in the magnetic recording section, and a data recording method thereof.

〔Example〕

The present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 1(A) and 1(B) show the shape of a magnetic card according to the present invention, with FIG. 1(A) showing the front side and FIG. 1 CB) showing the back side, respectively. In FIG. 1, reference numeral 1 indicates a magnetic card, and a magnetic recording section 2 is provided along the longitudinal direction at the upper center of the front side of the card. A pattern printing recording section made of magnetic ink and a mark 4 of card-specific data is provided so as to be invisible to the naked eye due to the soft magnetic material layer 5. In FIG. Although they are placed on opposite sides of the cards, they may be placed on the same side.

The magnetic recording section 2 is a magnetic stripe in a general magnetic card, and records variable data such as amount of money and security data to be described later. The pattern printing recording section using magnetic ink consists of two types of marks, namely, timing marks 3 and card-specific data marks 4, and these data are recorded by printing using magnetic ink.

Examples of magnetic inks include butyral resin, vinyl chloride/vinyl acetate copolymer resin, urethane resin, polyester resin, cellulose resin, acrylic resin, and styrene/vinyl acetate copolymer resin.
A synthetic resin such as a maleic acid polymer resin is used as a binder resin, and if necessary, a rubber resin such as nitrile rubber or a urethane elastomer is added, and the magnetic material is, for example, 71t.
3205, CO-containing Fe2O3, FE3304, barium ferrite, strontium ferrite, Co/N1
・Fe-(!r alone or alloy, rare earth Co 1
appropriately selected from i11-isomer, CrO2, MNAl, etc.,
In addition to the binder resin and magnetic material described above, surfactants, silane coupling agents, plasticizers, wax, silicone oil, carbon and other pigments are added as necessary, and the mixture is processed using a three-roll mill, sand mill, ball mill, etc. A product prepared by kneading can be used.

The soft magnetic material layer 5 has timing marks 3 as shown in FIG.
This makes the mark on the card-specific data mark 4 invisible to the naked eye, and also hides the data visually.

Therefore, a normal reading device cannot read the timing mark 3 and the card-specific mark 4, making it impossible to detect the contents of the data.

As the material of the soft magnetic material layer 5, a magnetic material with high permeability and low coercive force and maximum residual magnetic flux density can be used, such as permalloy alloy, malbalm,
A soft magnetic material ink is used in which a sendust alloy is kneaded as a pigment into the binder resin used in the straight ink, and various additives are added.

The soft material layer 5 is formed by using the above-mentioned soft magnetic material ink, using general printing methods such as silk screen printing, offset printing, letterpress printing, plate printing, and electrostatic printing, gravure coating, and die coating. Coating thickness of 0.1~ by general coating methods such as method, knife coating method, roll coating method
It is formed with a thickness of 100 μm.

Further, printed patterns 6, characters, etc. can be provided on the soft magnetic material layer 5 by a normal printing method or coating method.

FIG. 4 (A), CB) shows the magnetic recording section 2 (of the magnetic card 1).
This conceptually shows the flow of data regarding the writing of data to two and the successive output of data from the magnetic card 1.

As an example, when writing to a magnetic card, as shown in FIG. The variable data to be recorded in the magnetic recording section 2 is converted into security data according to a predetermined algorithm and then written to the security data recording section of the recording section 2 at once, and then the variable data is written as is to the magnetic recording section 2 or the security data is converted into security data according to a predetermined algorithm. Data and variable data can also be scrambled and written to the magnetic recording section.

The reading of data from this magnetic card is performed in the 46th
As shown in (B), the variable data among the data read from the magnetic recording section is converted into security data according to a predetermined algorithm along with the card-specific data read from the mark recording section, and compared with the security data read from the magnetic card. do. This (second) determines whether the read magnetic card passes or fails.

FIG. 5 shows the configuration of the magnetic card reader/writer for writing data to the magnetic card and continuously outputting data from the magnetic card shown in FIGS. 41J(A) and 41J(B). In the figure, 10 is a magnetic read/write section that writes data to the magnetic recording section 2 of the magnetic card 1 and continuously outputs data from the magnetic recording section 2;
a magnetic read head 12 and a magnetic data write circuit 16;
- It has an air data reading circuit 14. Reference numeral 20 denotes a card-specific data reading section, which includes a magnetic write head 21, a timing mark reading outlet 22', and a magnet 24 that provides a bias magnetic field for reading and receiving unique data marks.

Furthermore, 30 is an MPU unit constituted by, for example, a microprocessor, and 40 is an external device.

When writing to a magnetic card in this magnetic card reader/writer, first the unique data of the card is read by the unique data reading section 20. That is, a timing mark 3 and a card-specific data mark 4 printed with negative ink are completely straightened in a certain direction by a magnetic writing head 21, and then marked with magnetic reading heads 22 and 22' while applying a bias field with a magnet 24. The signal is detected and provided to the MPU 30 via the unique data reading circuit 23.

Furthermore, the variable data is read from the magnetic recording section 2 by the magnetic read/write head 12 of the magnetic read/write section 10, and the variable data is read from the magnetic recording section 2.
The O10 unit receives a signal from a device such as a telephone, creates new variable data to be written, and creates MPUP4O10 security data from the previously read card specific data and the variable data. Then, new C: write variable data and security data to the magnetic write head 1.
1 to write to the magnetic recording section 2 of the card.

When a magnetic card with data written in this way is placed in a magnetic card reader/writer to make a phone call, for example, the card is sent in the direction of the set meal (=== sent in the direction of the set meal by a scanning mechanism (not shown) and read by the magnetic read/write section 10. Both variable data and security data are read by the head 12 and sent to the MPUP 4O10 via the magnetic data circuit 14.

10,000, in the unique data reading device section 20, the timing mark 3 and the card unique data mark 4 printed with magnetic ink are printed from the magnetic head 21 on the entire surface, and the bias magnetic field is not applied at the output side 24. A mark signal is detected by 22'. Then, the mark signal is sent to the MPUP4O10 via the unique data circuit 23.

MPUP4O10 converts the variable data and unique data read from the -Ki card into security data according to the MPUP4O10-defined algorithm, and also converts the security data read from the -Ki card to MPUP4O10.
You can get 10. The security data obtained by MPUP4O10 conversion is compared with the read security data, and a pass or fail output is generated depending on whether the two match.

If it passes, a signal for permission to use the phone is output, a signal corresponding to the amount of phone usage is obtained, and the new variable data obtained by subtracting it from the original variable data is magnetically recorded on the 1-ki card 1. Write in part 2. Writing is as described above. If the test fails, a signal indicating that the telephone cannot be used is output.

[Modified example]

In the above embodiment, the card-specific data is given as a timing mark and a corresponding mark, but the same effect can be obtained with a so-called magnetic bar code or M-OR character, which is created by the size of the bar width and the size of the space using magnetic ink. is obtained.

Card-specific data printing using these magnetic inks can be easily performed by using a number machine.

〔Effect of the invention〕

As mentioned above, the present invention uses magnetic ink that is hidden from view by a soft magnetic material layer on a magnetic card on which variable data is recorded in a magnetic recording section, and that cannot be read at once by a normal magnetic reader. A pattern printing section is provided, and card-specific data is recorded in this printing section. Security data created from this unique data and variable data is recorded in the magnetic recording section, making it possible to create magnetic cards that are difficult to counterfeit. can be provided.

In other words, the easiest way to counterfeit is by copying, but
Card-specific data marks cannot be visually identified, and the data cannot be detected by ordinary reading devices.

Therefore, even if a card is produced by duplicating the data recorded in the magnetic recording section 2 as is, if the card-specific data is different, the security data will not match and a counterfeit card can be easily detected.

As a result, it is most effective against counterfeiting not only ordinary credit cards and bank cards, but also telephone cards, which do not have a personal identification number and cannot be used to identify the user.

[Brief explanation of drawings]

Figures 1 (A) and CB) are a top view and a back view showing the shape of a magnetic card according to the present invention, and Figure 2 shows the structure of a pattern printed using magnetic ink with an opening force. FIG. Figures 3 (A) and (B) are conceptual illustrations for explaining the operations of writing and reading various data on the same card, and Figure 4 illustrates the operations shown in Figures 3 (A) and (B). This is a block wire diagram showing the configuration of a magnetic card reader/writer for the purpose of this application. 1・・・・・・・・・・・・・・・・・・-Ki card 2
・・・・・・・・・・・・・・・Magnetic recording section 3・
・・・・・・・・・・・・・・・・Timing mark 4・・・・・・・・・・・・・・・Card specific data mark 5・・・・・・・・・・・・・・・・・・・・・Soft material layer 6・・・・・・・・・・・・・・・Picture layer 11.21・・・・・・Magnetic Write head 12.
22.22'...6 reading head 24...
...Bias magnetic field generating magnet patent applicant Dai Nippon Printing Co., Ltd. Agent Patent attorney Atsushi Konishi Figure 1 (A) Figure 2

Claims (2)

[Claims] (1) The card surface has a magnetic recording part and a pattern printed part made of separate magnetic ink that is magnetically hidden by a soft magnetic material layer and hidden from view, and the magnetic recording part has variable data and 1. A magnetic recording card comprising a predetermined data recording section consisting of fixed data and a security data recording section, and a card-specific data recording section in the pattern printing section using magnetic ink. (2) In a data recording method for a magnetic card having a magnetic recording section and a pattern printing recording section using magnetic ink on the card surface, variable data is recorded in the magnetic recording section, and the pattern printing recording section using magnetic ink is unique to the card. A data recording method for a magnetic card, comprising recording data, forming security data using the variable data and the unique data according to a predetermined algorithm, and recording the security data in the magnetic recording section.