JPH05174207A - Ic card and its collating method - Google Patents

Abstract

PURPOSE:To prevent illegal use executed by separating an IC module and a base material, in the IC card. CONSTITUTION:On the surface of the IC card 10, a random pattern 16 is formed by a magnetic material. At the time of issuing the IC card, the pattern 16 is read by a magnetic head 22 and its data is written in a memory 36 of the IC card 10 from an IC card reader/ writer 26, and at the time of use, the random pattern 16 is read in the same way and collared with the data of the random pattern stored in the memory 36, and the validity of correspondence of a base material and an IC module is confirmed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC card and a collating method therefor, and more particularly to a base material and an IC constituting the IC card.
The present invention relates to an IC card capable of confirming the legitimacy of an IC card regarding correspondence with a module, and a collating method for the IC card.

[0002]

As is well known, an IC card is formed by embedding an IC module in a predetermined position of a plastic base material. The IC module is formed with a CPU, a memory, etc., and stores predetermined data, and also processes the data read from the outside and collates with the stored data. For example, when using an IC card, data (for example, PIN) that allows reading of the memory is input from the reader / writer in a fixed procedure, and this data is collated with the data stored in advance in the memory to determine the predetermined data in the memory. I'm trying to allow reading and writing. In this way, the IC module is protected from unauthorized access.

[0003]

However, as described above, the IC card is formed by embedding the IC module in the base material, and since the IC module is usually integrated with the base material by an adhesive, the IC card is The module may be separated from the base material and adhered to another base material to be used as a new IC card. By separating the IC module from the base material and combining it with another base material in this way, an unauthorized user can utilize the character information, emboss information, magnetic information of the magnetic material, etc. formed on the surface of another card base material. The circuit formed in the IC module can be accessed. As described above, since the IC module and the base material can be separated from each other in the IC card, there is a problem that the IC card is used for illegal use.

The present invention solves the above problems and solves the problem of IC
An IC that can prevent unauthorized use by checking the correspondence between the base material that constitutes the card and the IC module
The purpose is to provide a card and a matching method thereof.

[0005]

According to the present invention, in an IC card comprising a substrate and an IC module, the substrate is
A random pattern that can be read as data specific to the base material is formed, and the IC module includes a memory that stores data corresponding to the random pattern formed on the base material, and reads the random pattern from the base material,
The data corresponding to the random pattern stored in the memory is read and the validity of the card is confirmed by comparing these data.

Further, according to the present invention, in the IC card collating method for confirming the legitimacy of the IC card having the base material and the IC module, at the time of manufacturing the base material, random unique data unique to the base material is provided. When a card is formed, a random pattern is read when the card is issued, and the corresponding data is written in the memory of the IC module. When the card is used, the random pattern is read from the base material and stored in the memory. The data of the IC card is read, and the data of the random pattern read from the base material is compared with the data of the random pattern read from the memory to verify the validity of the IC card.

[0007]

Embodiments of the IC card and its collating method according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of an IC card according to the present invention.

As shown in the figure, this IC card 1
In No. 0, the IC module 14 is embedded at a predetermined position of the base material 12, and the random pattern 16 of the magnetic material is formed at another predetermined position. Random pattern 1
In the present embodiment, 6 is formed at a position where a magnetic pattern is formed in an ordinary magnetic card, but 6 is formed on the entire surface of the base material 12 excluding the portion where the IC module 14 is embedded, and the random pattern of FIG. You may make it read the position corresponding to 16 parts. Further, the random pattern 16 may be formed at a position other than the position where the magnetic pattern is formed in the normal magnetic card and used in combination with the normal magnetic pattern.

The random pattern 16 is formed of a magnetic material in a pattern peculiar to each card, as shown in FIGS. Random pattern 1
6 may have a physical property in which the value of the checked area changes randomly, and for example, a magnetic material may be flowed as a fluid on the base material 12 like a sumi-e ink to form a random pattern. ..

FIG. 2 shows an example of a collation system using the IC card shown in FIG. The system reads an IC card 10 and a random pattern 16 formed on a base material 12 holding the IC card 10 and reads the data from the random pattern 16.
The collation device 20 is configured to compare data input to the C module 14 and input to the IC module 14 of the IC card 10 with data read from the base material 12 (random pattern 16).

The matching device 20 has a magnetic head 22 for reading the random pattern 16 of the IC card 10. The magnetic head 22 is a random pattern 16 of the IC card 10.
The specific position where the mark is formed is scanned, and the random pattern 16 formed of the magnetic material is read.

The data of the random pattern 16 read by the magnetic head 22 is sent to the AD converter 24 and converted into digital data. The AD converter 24 converts the signal obtained from the magnetic head 22 into digital data by a known method. The signal obtained from the magnetic head 22 is divided into, for example, 128 horizontal axis positions, and converted into digital values of 0 to 63 as ordinates for each position.
The random pattern 16 is represented by such digital data.

The data of the random pattern 16 converted into digital data by the AD converter 24 is sent to the IC card reader / writer 26. The IC card reader / writer 26 inputs the data of the random pattern 16 to the CPU 32 in the IC module 14 through the input / output terminal of the IC module 14 mounted on the IC card 10. C
The PU 32 sends the data of the random pattern 16 input from the IC card reader / writer 26 to the matching unit 34, and also sends the data stored in the memory 36 to the matching unit 34. The collating unit 34 compares and collates these data, and outputs the result of matching or non-matching to the CPU 32.

Next, an IC card collating method using such a system will be described. When the IC card 10 having the random pattern 16 formed of the magnetic material as described above is manufactured, the issuer of a bank or the like,
The card 10 is set in the matching device 20 shown in FIG. The random pattern 16 of the IC card 10 is read by the magnetic head 22 and converted into digital data by the AD converter 24.

The digital data output from the AD converter 24 is input from the IC card reader / writer 26 to the CPU 32 of the IC card 10. The CPU 32 sends this data to the memory 36, and the data corresponding to the random pattern 16 is stored in the memory 36.

The IC card thus issued is
When the user of the IC card 10 sets the IC card 10 in the collation device 20 of FIG. 2, the random pattern 16 of the IC card 10 is read by the magnetic head 22 and AD
It is converted into digital data by the conversion unit 24.

The digital data output from the AD converter 24 is input from the IC card reader / writer 26 to the CPU 32 of the IC card 10. The CPU 32 sends this data to the matching unit 34, reads the data of the pattern stored in the memory 36, and sends it to the matching unit 34. These two pieces of data are collated by the collation unit 34, and the correctness of the correspondence between the base material 12 on which the random pattern 16 is formed and the IC module 14 is confirmed.

When the CPU 32 receives a signal indicating that the data match, the CPU 32 permits subsequent data processing, for example, reading and writing of data from the memory 36.

As described above, according to the present system, when the IC card is issued, the random pattern 16 is formed on the base material 12 and read, and the data is stored in the memory 36 in the IC module 14, Since the random pattern 16 is read and compared with the data stored in the memory 36 even when the substrate 12 and the IC module 1 are used,
The legitimacy of the correspondence of 4 can be confirmed. Therefore, it is possible to prevent unauthorized use such as separating the IC module 14 from the base material 12 and mounting it on another base material.

In the above embodiment, the random pattern 16 is made of a magnetic material, and the data specific to the IC card is obtained by reading this with a magnetic head. However, the random pattern 16 is made of a magnetic material. It is not limited to this, but may be one that is detected by a visible pattern or an electromagnetic wave of a specific wavelength. For example, JP-A-55
As disclosed in US Pat. No. 163,443, the random pattern 16 is formed of a fiber material of a conductive metal, and a microwave is incident on the random pattern 16 and the reflected wave is measured to read the random pattern 16. Good.

The random pattern 16 is not limited to being formed on the surface of the base material 12, but may be formed inside the base material. For example, if the base material is adhered from both sides with the material forming the random pattern sandwiched and the random pattern 16 is formed inside the base material, the pattern cannot be seen from the surface of the IC card, which is effective in preventing forgery. is there.

The random pattern 16 is the IC card 10
When it is formed on the surface of the base material 12, the ink can be formed by printing with an ink that reacts with infrared rays or ultraviolet rays. In this case, the infrared ink is used on the surface of the base material 12 to form a wood grain pattern or the like. The random pattern 16 can be easily formed by printing and forming a random pattern.

In this case, the random pattern 16 can be read by detecting a wood grain pattern formed by using an infrared ink formed on the surface of the substrate 12 with an infrared sensor. It can be carried out by the same method as in the case of using the magnetic paint.

The random pattern 16 is the IC card 10
As another example of forming on the surface of the base material 12 of,
The random pattern 16 can also be formed by printing a pattern, a character, or the like with a magnetic paint so as to be a part of the design of the surface of the base material 12.

The read random pattern 16
Does not use all of its data, but uses only the part that meets certain conditions,
The data amount of the random pattern 16 stored in 6 can be reduced, and even if the random pattern 16 is read by a third party, forgery and tampering are impossible unless specific conditions are known, and security is improved. Can be improved.

The specific condition is set, for example, by using a portion of the read random pattern 16 which is ½ or more of the peak value as data.

The security can also be improved by changing the position of the random pattern 16 to be read or by specifying which part of the random pattern 16 is used for each read based on a certain fixed condition.

The position where the random pattern is formed may be a specific position or the entire surface of the card. Further, if the same reading method is used at the time of registration and verification, the pattern reading head may read the pattern from any position on the card.

Furthermore, if the same random pattern can be read at the time of registration and verification, the reading method may be changed to the magnetic type or the electromagnetic type.

As another method of using the random pattern 16, by using the digital data obtained by converting the read random pattern 16 by the AD conversion unit as an encryption key, the IC module 14 and the base material 12 are inseparable. It can be the IC card 10.

[0032]

According to the present invention, a random pattern is formed on the base material of an IC card, and the read data is used as the I
It is stored in the memory in the C module. When the IC card is used, the random pattern is read and collated with the data stored in the memory, so that the correctness of the correspondence between the base material and the IC module can be confirmed. Therefore, it is possible to effectively prevent illegal use such as separating the IC module from the base material and mounting it on another base material.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an IC card according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a collation system using the IC card of FIG.

FIG. 3 is a diagram showing an example of a random pattern.

[Explanation of symbols]

 10 IC Card 12 Base Material 14 IC Module 16 Random Pattern 20 Collating Device 22 Magnetic Head 24 AD Converter 26 IC Card Reader / Writer 32 CPU 34 Collating Unit 36 Memory

Claims (3)

[Claims] 1. An IC card having a base material and an IC module, wherein the base material is formed with a random pattern readable as data unique to the base material, and the IC module is formed on the base material. A memory for storing data corresponding to the random pattern, reading the random pattern from the base material, reading the data corresponding to the random pattern stored in the memory, and comparing the data to obtain a card. I characterized by confirming the correctness of
C card. 2. The IC card according to claim 1, wherein:
The IC card, wherein the random pattern is formed on the base material by a magnetic material. 3. A method for verifying the validity of an IC card having a base material and an IC module, comprising a random pattern on the base material as unique information data specific to the base material when the card is issued. And the corresponding data obtained by reading the random pattern is written in the memory of the IC module, and when the card is used, the random pattern is read from the base material and stored in the memory. The validity of the IC card is confirmed by reading the data corresponding to the random pattern and comparing the data of the random pattern read from the base material with the data corresponding to the random pattern read from the memory. A method of collating an IC card, characterized by: