JP2670552B2 - Magnetic recording card and data recording method thereof - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for preventing forgery of a magnetic card, and more particularly to general magnetic data recording and magnetic data pattern-printed magnetic data recording. The present invention relates to a magnetic recording card used together and a data recording method thereof. 2. Description of the Related Art In recent years, so-called magnetic cards for magnetically recording data have been around. 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 heretofore been 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 in which a special element other than magnetic data is embedded in a card so that it cannot be seen, and whether the special element is present or not is used to make a true / false determination. 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. The fourth is a method of writing using a certain algorithm at the time of 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. . The present invention has been made in view of the above points, and an object thereof is to provide a magnetic recording card which cannot be easily forged and a data recording method thereof. To achieve this object, in the present invention, pattern printing with magnetic ink is provided on any portion of the card other than the ordinary magnetic data recording portion, and this printing portion is machine-readable. A magnetic recording card for recording possible card-specific data, and for recording security data formed on the magnetic recording section according to a predetermined algorithm from the card-specific data and the variable data recorded on the ordinary magnetic data recording section; The data recording method is provided. 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, and FIG. 1 (A) shows the front side,
The same figure (B) has shown the back side, respectively. 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. As the magnetic ink, for example, a synthetic resin such as butyral resin, vinyl chloride / vinyl acetate copolymer resin, urethane resin, polyester resin, cellulosic resin, acrylic resin, styrene / maleic acid polymer resin is used as a binder resin, which is required. According to the above, rubber resin such as nitrile rubber, urethane elastomer is added, and as a magnetic material, for example, γ-Fe2O3, Co-containing Fe2O3, Fe3O4, barium ferrite, strontium ferrite, Co ・ Ni ・ Fe ・ Cr
Of the binder resin, magnetic substance, surfactant, silane coupling agent, plasticizer, wax, silicone oil, carbon, etc. Other pigments may be added as necessary, and kneaded with a three-roll mill, sand mill, ball mill or the like to prepare a product. As shown in FIG. 2, the concealing layer 5 is an ink having a high concealing property, that is, a white ink, a black ink, or a gold ink, which makes the mark invisible on the timing mark 3 and the card-specific data mark 4. It is formed by a general printing method using a 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, the layer 6 on the mark 4 and the hiding layer 5 using the ink for hiding the marks 3 and 4
Furthermore, a pattern layer 7 such as a tint block can be provided on the layer 5. 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. Forgery is most easily duplicated, but the card-specific data mark cannot be visually identified due to the pattern printing part made of magnetic ink that is hidden invisible in this way. It's difficult to find out. The mark can be read by detecting it with a general magnetic head or a hall sensor. 4A and 4B show writing of data to the magnetic recording portion 2 of the magnetic card 1 and the magnetic card 1.
3 conceptually shows the flow of data for reading data from the. 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). Is. In the figure, reference numeral 10 denotes a magnetic read / write unit for writing data in the magnetic recording unit 2 of the magnetic card 1 and reading data from the magnetic recording unit 2, and includes a magnetic write head 11, a magnetic read head 12 and a magnetic data write unit. Embedded circuit 1
3. Has a magnetic data reading 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. Plus 30
Is an MPU composed of a microprocessor, etc.
Part 40 is an external device. In writing to a magnetic card in this magnetic card reader / writer, the unique data of the card is first read by the unique data reading unit 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, from the magnetic recording unit 2 to the magnetic read / write unit.
Variable data is read by 10 magnetic read heads 12 and MP
The U unit 30 obtains a signal from an external device such as a telephone, creates new variable data to be written, and the MPU unit 30 creates security data from the previously 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 and are 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 sent to the MPU via the unique data circuit 23.
Given to part 30. The MPU unit 30 converts variable data and unique data read from the magnetic card into security data according to a predetermined algorithm in the MPU unit 30.
Security data read from the magnetic card is also MPU section 30
Given to. 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 thereto. This is what is called a magnetic bar code or MICR character depending on the size of the bar width and the space of the magnetic ink. But the exact same effect can be obtained. Printing of card-specific data with these magnetic inks can be easily performed by using a number machine. As described above, according to the present invention, a magnetic card having variable data recorded in the magnetic recording section is provided with a pattern printing section using magnetic ink, and the 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, 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, according to the present invention, the security data created from the card-specific data and the variable data is also variable data,
As it makes it difficult to forge the data in the card and the card itself carries the information for card identification, there is no load on the magnetic card reader / writer side and it is not necessary to specify the device to be used. Can be used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (A) and FIG. 1 (B) are a plan view of a front surface and a plan view of a back surface showing a shape of a magnetic card according to the present invention. FIG. 2 is a cross-sectional view showing the structure of a pattern printed matter using magnetic ink of the card. FIG. 3 is a cross-sectional view showing the structure of a pattern printed matter using magnetic ink of the card. 4 (A) and 4 (B) are conceptual diagrams for explaining respective writing and reading operations of various data with respect to the same card. FIG. 5 is a block diagram showing a configuration of a magnetic card reader / writer for performing the operation shown in FIGS. 4 (A) and 4 (B). [Explanation of symbols] 1 magnetic card 2 magnetic recording part 3 timing mark 4 card specific data mark 5 concealing layer 6 dummy mark printing layer of the same color as the magnetic ink 7 pattern layer 11,21 magnetic writing head 12,22 magnetic reading head

Claims (1)

(57) [Claims] A magnetic recording unit and a pattern printing unit using magnetic ink separate from the magnetic recording unit are provided on the card surface, the pattern printing unit using the magnetic ink records card-specific data, and the magnetic recording unit uses the card. A magnetic recording card characterized in that variable data that changes according to the above and security data formed from the variable data and the card specific data are recorded. 2. In a data recording method of a magnetic card having a magnetic recording section on a card surface and a pattern print recording section in which card-specific data by magnetic ink is recorded, variable data which changes according to use of the card is recorded in the magnetic recording section. Characterized in that security data is formed according to a predetermined algorithm from card-specific data read from the pattern print recording unit and variable data recorded in the magnetic recording unit, and the security data is recorded in the magnetic recording unit. Data recording method for magnetic cards.