JP4746743B2 - Magnetic card - Google Patents

Magnetic card Download PDF

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Publication number
JP4746743B2
JP4746743B2 JP2000391063A JP2000391063A JP4746743B2 JP 4746743 B2 JP4746743 B2 JP 4746743B2 JP 2000391063 A JP2000391063 A JP 2000391063A JP 2000391063 A JP2000391063 A JP 2000391063A JP 4746743 B2 JP4746743 B2 JP 4746743B2
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JP
Japan
Prior art keywords
data
card
magnetic
magnetic card
feature
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Expired - Fee Related
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JP2000391063A
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Japanese (ja)
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JP2002189997A (en
Inventor
千春 荒井
直之 小島
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NEC Platforms Ltd
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NEC Platforms Ltd
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Publication of JP4746743B2 publication Critical patent/JP4746743B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、データを磁気記録するための磁気記録帯が設けられ、エンボス加工によって長辺側のエッジと平行に文字列が凹凸表示されている磁気カードにおいて、正規カードに磁気記録されているデータを他のカードに複写した不正カードの利用を防止するための技術に関する。
【0002】
【従来の技術】
クレジットカードや銀行のキャッシュカード等の磁気カードは、合成樹脂のカード基板の一面または両面に磁性体からなる磁気記録帯が設けられ、この磁気記録帯にクレジット番号や銀行の口座番号を含むデータが磁気記録されている。
【0003】
【発明が解決しようとする課題】
ところが、このような従来の磁気カードにおいて、正規の磁気カードの磁気記録帯に記録されているデータが他のカードの磁気記録帯に複写されて不正に使用されるという問題が発生している。
【0004】
本発明は、この問題を解決して、データの複写による不正使用を防止することができる磁気カードを提供することを目的としている。
【0005】
【課題を解決するための手段】
前記目的を達成するために、本発明の磁気カードは、
データを磁気記録するための磁気記録帯が設けられ、エンボス加工によって長辺側のエッジと平行に文字列が凹凸表示されている磁気カードにおいて、
前記長辺側のエッジから所定距離の位置を該エッジと平行に通過する線と交わる前記文字列の凹凸の特徴を表す特徴データが前記磁気記録帯に予め記憶されており、さらに、該特徴データが、前記線と交わる文字列の隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの比較結果を2値化して得られるデータ、隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの差あるいは比を2値化して得られるデータ、あるいは、それらのデータを組合せたデータであることを特徴としている。
【0006】
【発明の実施の形態】
以下、図面に基づいて本発明の実施の形態を説明する。
図1は、本発明を実施した磁気カード20の外観を示している。
【0007】
図1に示しているように、外形がほぼ長方形状に形成された合成樹脂製の磁気カード20の一面20a側には、エンボス加工によって他面20b側から押し出すようにして凹凸で表示された文字列(文字、数字、記号を含むものとする)21が、一方の長辺側のエッジ20cと平行に且つそのエッジ20cから所定の距離範囲に形成されている。
【0008】
この文字列21は、例えばクレジット番号、口座番号、個人名称等のようにそれぞれの磁気カードに固有のものであり、また、突出する高さや幅等の寸法もカード個々でばらつきがある。
【0009】
また、磁気カード20の両面(またはどちらか片面)には、データを磁気記録するための磁気記録帯22、23が、長辺側のエッジ20cと平行に形成されている。
【0010】
一方の磁気記録帯22には、クレジット番号あるいは銀行の口座番号を含むデータDaが磁気記録されており、他方の磁気記録帯23には、長辺側のエッジ20cから所定距離Lrの位置をそのエッジ20cと平行に通過する線Rと交わる文字列21の凹凸の特徴を表す特徴データDbが予め記憶されている。
【0011】
この特徴データDbとしては、線Rと交わる文字列21の隣り合う凸部分や凹部分の長さの比較結果を2値化して得られるデータ、隣合う凸部分の高さの比較結果を2値化して得られるデータ、隣合う凸部分や凹部分の長さ、高さの差や比を2値化して得られるデータ、あるいはこれらのデータを組み合わせたデータを用いることができる。
【0012】
例えば、線Rと交わる文字列21の隣り合う凸部分の長さの比較結果を2値化して特徴データDbを求める場合について説明すると、エンボス加工による文字列21のうち、線Rと交わる部分の凹凸の状態が図2の(a)になっている場合、最初の凸部分の長さLa1より2番目の凸部分の長さLa2が長いので、図2の(b)のように、特徴データDbの第lビット目を「1」とし、この2番目の凸部分の長さLa2より3番目の凸部分の長さLa3が短いので、特徴データDbの第2ビット目を「0」とする。以下同様に凸部分の長さの比較結果を2値化することで、線Rと交わる、即ち、エッジ20cから所定距離Lrにおける文字列21の凹凸の特徴を表す特徴データDbが得られる。
【0013】
なお、図2の(c)は、凹部分の長さLb1、Lb2、Lb3、…の比較結果を2値化した場合に得られる特徴データDbを示している。
【0014】
また、上記のように、隣合う凸部分や凹部分の長さの比較結果を2値化して特徴データDbを得る場合、長さがほぼ等しい場合(長さの差が許容範囲内の場合)には、データ「0」、「1」のうち、予め決められた一方のデータを特徴データDbのビットデータとする。
【0015】
このように構成された磁気カード20では、この磁気カード20を読み取る読取装置側で検出した前記線Rの位置における凹凸の特徴を表す特徴データDb′と、磁気記録帯23から読み取った特徴データDbとが必ず一致(またはほぼ一致)するので、この磁気カード20を正規のカードとして処理することができる。
【0016】
また、このように構成された正規の磁気カード20の磁気記録帯22、23に記録されているデータDa、Dbを別の磁気カードの磁気記録帯に複写して不正カードを作成しても、読取装置側で検出した線Rの位置における凹凸の特徴とそのカードの磁気記録帯から読み取った特徴データDbとが一致しない(あるいは大きく相違する)ので、そのカードを不正なカードと判定することができ、この不正なカードの使用を防止できる。
【0017】
なお、ここでは、両面に磁気記録帯22、23が設けられている磁気カード20について説明したが、一方の面だけに磁気記録帯が設けられている磁気カードの場合には、その磁気記録帯にエンボス加工による文字列の凹凸の特徴を表す特徴データDbを他のデータDaとともに記録する。
【0018】
【発明の効果】
以上説明したように、本発明の磁気カードは、
データを磁気記録するための磁気記録帯が設けられ、エンボス加工によって長辺側のエッジと平行に文字列が凹凸表示されている磁気カードにおいて、
前記長辺側のエッジから所定距離の位置を該エッジと平行に通過する線と交わる前記文字列の凹凸の特徴を表す特徴データが前記磁気記録帯に予め記憶されており、さらに、該特徴データが、前記線と交わる文字列の隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの比較結果を2値化して得られるデータ、隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの差あるいは比を2値化して得られるデータ、あるいは、それらのデータを組合せたデータであることを特徴としている。
【0019】
このため、磁気カードのエンボス加工によって凹凸で表示されている文字列の長辺側のエッジから所定距離の位置における凹凸の特徴と磁気記録帯に記録されている特徴データとを照合することで、その磁気カードの正偽を判別することができ、磁気記録されているデータの複写による不正使用を確実に防止することができる。
【図面の簡単な説明】
【図1】本発明の実施形態の磁気カードの外観を示す図
【図2】磁気カードのエンボス加工による凹凸の状態と特徴データの一例を示す図
【符号の説明】
20 磁気カード
20a 一面
20b 他面
20c 長辺側エッジ
21 エンボス加工による文字列
22、23 磁気記録帯
[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)

データを磁気記録するための磁気記録帯が設けられ、エンボス加工によって長辺側のエッジと平行に文字列が凹凸表示されている磁気カードにおいて、
前記長辺側のエッジから所定距離の位置を該エッジと平行に通過する線と交わる前記文字列の凹凸の特徴を表す特徴データが前記磁気記録帯に予め記憶されており、さらに、該特徴データが、前記線と交わる文字列の隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの比較結果を2値化して得られるデータ、隣合う凸部分同士または隣合う凹部分同士の長さまたは高さの差あるいは比を2値化して得られるデータ、あるいは、それらのデータを組合せたデータであることを特徴とする磁気カード。
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 .
JP2000391063A 2000-12-22 2000-12-22 Magnetic card Expired - Fee Related JP4746743B2 (en)

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CN110197179B (en) * 2019-03-14 2020-11-10 北京三快在线科技有限公司 Method and device for identifying card number, storage medium and electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129563U (en) * 1982-02-24 1983-09-01 オムロン株式会社 Authenticity determination device for recording media
JPS6266392A (en) * 1985-09-18 1987-03-25 Omron Tateisi Electronics Co Card identification method
JP2000231620A (en) * 1999-02-10 2000-08-22 Dainippon Printing Co Ltd Card

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054694B2 (en) * 1982-01-27 1985-12-02 株式会社日立製作所 storage controller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129563U (en) * 1982-02-24 1983-09-01 オムロン株式会社 Authenticity determination device for recording media
JPS6266392A (en) * 1985-09-18 1987-03-25 Omron Tateisi Electronics Co Card identification method
JP2000231620A (en) * 1999-02-10 2000-08-22 Dainippon Printing Co Ltd Card

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