JP4746743B2 - Magnetic card - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a magnetic card in which a magnetic recording band is provided for magnetically recording data, and a character card is unevenly displayed in parallel with the edge on the long side by embossing. The present invention relates to a technique for preventing the use of a fraudulent card that is copied to another card.
[0002]
[Prior art]
Magnetic cards such as credit cards and bank cash cards are provided with a magnetic recording band made of a magnetic material on one or both sides of a synthetic resin card substrate, and data including a credit number and a bank account number is stored in the magnetic recording band. Magnetic recording.
[0003]
[Problems to be solved by the invention]
However, in such a conventional magnetic card, there is a problem that data recorded in the magnetic recording band of a legitimate magnetic card is copied and illegally used in the magnetic recording band of another card.
[0004]
An object of the present invention is to provide a magnetic card capable of solving this problem and preventing unauthorized use due to data copying.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the magnetic card of the present invention comprises:
In a magnetic card in which a magnetic recording band for magnetically recording data is provided, and character strings are displayed unevenly in parallel with the edge on the long side by embossing,
Feature data representing the feature of the unevenness of the character string intersecting with a line passing through a position at a predetermined distance from the edge on the long side is stored in the magnetic recording band in advance , and the feature data However, the data obtained by binarizing the comparison result of the length or height of adjacent convex portions or adjacent concave portions of the character string intersecting the line, adjacent convex portions or adjacent concave portions It is characterized in that it is data obtained by binarizing the length or height difference or ratio, or data obtained by combining these data.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the appearance of a magnetic card 20 embodying the present invention.
[0007]
As shown in FIG. 1, on one surface 20a side of the synthetic resin magnetic card 20 whose outer shape is formed in a substantially rectangular shape, characters are displayed in irregularities so as to be extruded from the other surface 20b side by embossing. A row (including letters, numbers, and symbols) 21 is formed in parallel with one long side edge 20c and within a predetermined distance range from the edge 20c.
[0008]
The character string 21 is unique to each magnetic card such as a credit number, an account number, a personal name, and the like, and the projecting height and width dimensions vary from card to card.
[0009]
Further, magnetic recording bands 22 and 23 for magnetically recording data are formed on both sides (or one side) of the magnetic card 20 in parallel with the long side edge 20c.
[0010]
Data Da including a credit number or bank account number is magnetically recorded in one magnetic recording band 22, and the other magnetic recording band 23 is located at a predetermined distance Lr from the edge 20c on the long side. Feature data Db representing the feature of the unevenness of the character string 21 that intersects the line R passing in parallel with the edge 20c is stored in advance.
[0011]
As the feature data Db, data obtained by binarizing the comparison results of the lengths of adjacent convex portions and concave portions of the character string 21 intersecting with the line R, and binary comparison results of the heights of adjacent convex portions turned into by the data obtained, next to fit the convex portion or concave portion of the length, the data obtained by binarizing the difference or ratio of the height, or can be used data that combines these data.
[0012]
For example, the case where the comparison result of the lengths of adjacent convex portions of the character string 21 intersecting with the line R is binarized to obtain the feature data Db will be described. Of the character string 21 obtained by embossing, the portion intersecting with the line R is described. When the concave and convex state is as shown in FIG. 2A, the length La2 of the second convex portion is longer than the length La1 of the first convex portion. Therefore, as shown in FIG. Since the 1st bit of Db is “1” and the length La3 of the third convex portion is shorter than the length La2 of the second convex portion, the second bit of the feature data Db is “0”. . Similarly, by binarizing the comparison result of the lengths of the convex portions, the feature data Db that intersects the line R, that is, the feature data Db representing the features of the unevenness of the character string 21 at the predetermined distance Lr from the edge 20c is obtained.
[0013]
FIG. 2C shows the characteristic data Db obtained when the comparison results of the lengths Lb1, Lb2, Lb3,.
[0014]
Further, as described above, when the characteristic data Db is obtained by binarizing the comparison results of the lengths of adjacent convex portions and concave portions, when the lengths are substantially equal (when the difference in length is within an allowable range). In this case, one of the data “0” and “1” determined in advance is used as bit data of the feature data Db.
[0015]
In the magnetic card 20 configured as described above, the feature data Db ′ representing the feature of the unevenness at the position of the line R detected on the reading device side that reads the magnetic card 20 and the feature data Db read from the magnetic recording band 23 are obtained. Always match (or almost match), so that the magnetic card 20 can be processed as a regular card.
[0016]
In addition, even if an illegal card is created by copying the data Da, Db recorded in the magnetic recording bands 22, 23 of the legitimate magnetic card 20 thus configured to the magnetic recording band of another magnetic card, Since the uneven feature at the position of the line R detected on the reader side and the feature data Db read from the magnetic recording band of the card do not match (or greatly differ), it is determined that the card is an illegal card. And the use of this unauthorized card can be prevented.
[0017]
Here, the magnetic card 20 having the magnetic recording bands 22 and 23 provided on both sides has been described. However, in the case of a magnetic card having the magnetic recording band provided only on one side, the magnetic recording band is provided. The feature data Db representing the feature of the unevenness of the character string by embossing is recorded together with other data Da.
[0018]
【The invention's effect】
As described above, the magnetic card of the present invention is
In a magnetic card in which a magnetic recording band for magnetically recording data is provided, and character strings are displayed unevenly in parallel with the edge on the long side by embossing,
Feature data representing the feature of the unevenness of the character string intersecting with a line passing through a position at a predetermined distance from the edge on the long side is stored in the magnetic recording band in advance , and the feature data However, the data obtained by binarizing the comparison result of the length or height of adjacent convex portions or adjacent concave portions of the character string intersecting the line, adjacent convex portions or adjacent concave portions It is characterized in that it is data obtained by binarizing the length or height difference or ratio, or data obtained by combining these data.
[0019]
For this reason, by comparing the feature data recorded on the magnetic recording band with the feature of the unevenness at a position a predetermined distance from the edge of the long side of the character string displayed by the embossing of the magnetic card, The authenticity of the magnetic card can be determined, and unauthorized use due to copying of magnetically recorded data can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing an appearance of a magnetic card according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of unevenness and feature data obtained by embossing a magnetic card.
20 Magnetic card 20a One side 20b Other side 20c Long side edge 21 Character strings 22 and 23 by embossing Magnetic recording band

Claims (1)

In a magnetic card in which a magnetic recording band for magnetically recording data is provided, and character strings are displayed unevenly in parallel with the edge on the long side by embossing,
Feature data representing the feature of the unevenness of the character string intersecting with a line passing through a position at a predetermined distance from the edge on the long side is stored in the magnetic recording band in advance , and the feature data However, the data obtained by binarizing the comparison result of the length or height of adjacent convex portions or adjacent concave portions of the character string intersecting the line, adjacent convex portions or adjacent concave portions A magnetic card characterized in that it is data obtained by binarizing a difference or ratio in length or height, or data obtained by combining these data .

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