JP2002140667A - System and method concerned with prevention of card copying crime - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system and a method concerned with the prevention of card copying crimes and capable of securing a security function for the whole card media such as magnetic cards, IC cards and optical IC hybrid cards. SOLUTION: A card medium reader/writer 2 requests light reflection factor measuring position information acquired at the end of a preceding normal transaction with respect to a card medium certification device 1, and after receiving the information, a light reflection factor measuring processing part 24 measures the light reflection factor of the specified measuring position of a card medium 3 by using an optical system processing part 21. The light reflection factor measured on the basis of the preceding light reflection factor measuring position information is compared with the light reflection factor of the preceding light reflection factor measuring position recorded in a card medium certification device 1 to certify the card medium 3. At the time of certifying that the card medium 3 is a normal card, the light reflection factor of the light reflection factor measuring position based on current transaction information is measured and recorded in the device 1 as history information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to card copy crime prevention in which an optical recording medium is attached to a card so that a security function can be secured for all cards such as a magnetic card, an IC card, and an optical IC hybrid card. And a system and method for preventing counterfeit card crime.

[0002]

2. Description of the Related Art In recent years, magnetic cards, IC cards, optical ICs
ATM using card media such as hybrid card
E-commerce including credit and credit settlement, and experimental systems such as electronic money, electronic bills, and electronic checks are thriving.

[0003]

However, when the current card medium is used, there are the following problems. In other words, if you have a certain degree of intellectual knowledge,
It was possible to create a "physical copy card", which contributed to card crime. In particular, there were no effective measures against copy cards. Therefore, (1) distribution of electronic money, electronic bills, electronic checks, and other card media required for electronic commerce does not progress. (2) A large-scale crime has actually occurred with a credit card or the like, and this case cannot be solved only by dealing with an IC card alone. (3) In a conventional development technology for a card, a hardware element and a software element are separated and divided, and no security measures for a fine card are taken. There was a problem.

[0004] The present invention has been made in view of the above problems, and secures a security function for all card media such as a magnetic card, an IC card, and an optical IC hybrid card by attaching an optical recording medium to the card. An object of the present invention is to provide a system for preventing card copy crime. More specifically, by attaching an optical recording medium to a card medium, measuring and managing the light reflectance from a plurality of measurement positions for each card medium, and managing that information as medium characteristic information for authenticating the card, It is an object of the present invention to provide a system and a method for preventing card copy crime in which a copy card can be easily detected and a security function can be secured for the entire card medium.

[0005]

In order to solve the above problems, there is provided a card medium authentication apparatus for authenticating a card medium itself having an optical recording medium for recording information by light,
From a plurality of measurement positions of the light reflectance of the card medium, a plurality of specific measurement positions are designated, and a light reflectance measurement position calculation means for transmitting as characteristic measurement position information, and a characteristic designated by the light reflectance measurement position calculation means Card medium information recording means for recording the light reflectance measured for each past normal transaction at a plurality of measurement positions for each card medium in accordance with the measurement position information, as medium characteristic information, in association with information specifying the card medium; ,
A medium characteristic information management unit that extracts a light reflectance at a position measured during a past normal transaction from the medium characteristic information of the card medium recorded in the card medium information recording unit; Card medium authentication means for authenticating the card medium itself by comparing the light reflectance extracted from the characteristic information with the light reflectance read from the same position on the card medium is provided. With the above configuration, the card medium can be authenticated by measuring the light reflectance of the card medium at the designated measurement position and comparing the measured light reflectance with the medium characteristic information of the card medium recorded in advance.

According to the present invention, in the card medium authentication apparatus, when the information for specifying the card medium is identification information of the card medium recorded on the card medium, the card medium authentication apparatus reads the card medium read from the card medium. From the card medium information recording means, the card medium information recording means reads out the unique information at the time of card issuance of the user, which is recorded in association with the card medium identification information, based on the medium identification information, and the transaction time when the card medium was used. Transaction information management means for specifying the transaction information together with the temporary information, and the light reflectance measurement position calculation means uses the transaction information specified by the transaction information management means to determine a plurality of measurement positions of the light reflectance of the card medium. , A plurality of specific measurement positions are calculated. With the above configuration, it is possible to randomly obtain information on the measurement position for measuring the light reflectance for each transaction using the card medium.

According to the present invention, in the card medium authentication apparatus, the card medium information recording means stores and manages the light reflectance read from the card medium for each transaction for an arbitrary number of generations at each measurement position. The card medium authentication unit considers that the light reflectance read from the card medium is the same as the light reflectance extracted from the medium characteristic information of the card medium by the medium property information management means. If not, by comparing the light reflectance read from the card medium with the light reflectance of the same measurement position read from the card medium in a further past managed by the card medium information recording means, the card medium is read. It is characterized by performing its own authentication. With the above configuration, the measured data of the light reflectance is held and managed for an arbitrary number of generations, and the credibility of the data just measured is suspiciously affected by the characteristic deterioration due to aging of the optical recording medium provided on the card medium. In this case, it is possible to confirm the credibility of the currently measured data based on comparison with past data held and managed, and to eliminate the influence of characteristic deterioration.

According to the present invention, in the above-described card medium authentication apparatus, the card medium authentication means may include a light reflectance read from the card medium and a light reflectance extracted from the medium characteristic information of the card medium by the medium characteristic information management means. Are not the same, the further past light reflectance to be compared is a light reflectance of a defective portion that is not used for information recording on the optical recording medium.

According to the present invention, there is provided a card medium having an optical processing unit for reading and transmitting the recorded contents of the card medium and the light reflectance of an optical recording medium provided on the card medium to the card medium authentication device. A communication device for receiving, from a card medium authentication device, characteristic measurement position information designating a position at which light reflectance is measured, and transmitting the light reflectance measured according to the characteristic measurement position information to the card medium authentication device; Means, and light reflectance measuring means for measuring the light reflectance of the optical recording medium at the position designated by the characteristic measurement position information via a processing section of the optical system. With the above configuration, "0", "0", the light reflection amount is determined based on the threshold value
Instead of binary representation of 1 ", the light reflection amount is obtained as the physical reflection amount for each minimum measurement spot unit (bit),
By dividing the amount of reflection into n stages, the mechanism for obtaining card medium characteristics that could not be expressed by binarization is converted into software and commands (commands), and the reflectance itself is transferred from the card medium read / write device to the card medium authentication device. Enables transmission.

The present invention relates to a card medium to be read and written by the card medium read / write device, wherein the card medium is provided as an information recording section or an optical recording medium provided separately from the information recording section. It has at least one of a recording medium. The above configuration enables authentication of a card medium by attaching an optical recording medium for authentication to a magnetic card or an IC card using an IC chip in addition to a card using an optical recording medium as a recording unit of information of the card medium. Means that

According to the present invention, there is provided a card copy crime prevention system for authenticating a card medium itself from medium characteristic information of an optical recording medium provided in the card medium. And a medium reading / writing device.

The present invention relates to a card medium authentication method for authenticating a card medium itself having an optical recording medium for recording information by light, wherein a plurality of specified positions are determined from a plurality of measurement positions of the light reflectance of the card medium. A light reflectance measurement position calculation process of designating the measurement position of the same and transmitting it as the characteristic measurement position information, and a plurality of measurement positions for each card medium in accordance with the characteristic measurement position information specified by the light reflectance measurement position calculation process. Card medium information recording processing for recording the light reflectance measured for each normal transaction as medium characteristic information in association with information specifying the card medium, and medium characteristic information of the card medium recorded in the card medium information recording processing A medium characteristic information management process for extracting a light reflectance at a specified position from a card medium; a light reflectance extracted from the medium characteristic information of the card medium by the medium characteristic information management process; By comparison with the light reflectance read from the same position, characterized in that it comprises a card medium authentication process for authenticating a card medium itself.

According to the present invention, in the above-mentioned card medium authentication method, when the information for specifying the card medium is identification information of the card medium recorded on the card medium, the card medium authentication method comprises the steps of: From the card medium information recording means, the card medium information recording means reads out the unique information at the time of card issuance of the user, which is recorded in association with the card medium identification information, based on the medium identification information, and the transaction time when the card medium was used. Further includes a transaction information management process of specifying transaction information in conjunction with the temporary information of the card information, wherein the light reflectance measurement position calculation means calculates a plurality of measurement positions of the light reflectance of the card medium based on the transaction information specified by the transaction information management means. , A plurality of specific measurement positions are calculated.

The present invention is a card medium reading / writing method executed together with the above card medium authentication method for reading and transmitting the recorded contents of the card medium and the medium characteristic information of the optical recording medium provided on the card medium, A communication process of receiving characteristic measurement position information specifying a position at which the light reflectance is to be measured, and transmitting a light reflectance measured according to the characteristic measurement position information; and an optical recording medium at a position specified by the characteristic measurement position information And a light reflectivity measuring process for measuring the light reflectivity.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is an embodiment in which an optical storage medium is used as a recording unit of information of a card medium, and the optical recording medium is also used for authentication of the card medium itself by measuring light reflectance. In the present embodiment, the recording unit of the card medium is not read-only,
A case where writing is also possible will be described. FIG. 1 is a block diagram showing a configuration of a card copy crime prevention system according to an embodiment of the present invention. In this figure, reference numeral 1 is
A card medium authentication device according to the present embodiment,
The card medium itself is authenticated based on the light reflectance read from the optical recording medium provided on the card medium in which the identification information of the card medium is recorded, and a transaction predetermined with the card user is executed. . Reference numeral 2 denotes a card medium reading / writing device for explaining the present embodiment, and the optical medium of the optical recording medium at the designated position is designated according to the recorded contents of the card medium and the characteristic measurement position information received from the card medium authentication device 1. The reflectance is measured and transmitted to the card medium authentication device 1.
Reference numeral 3 denotes a card medium for explaining the present embodiment, which has an optical recording medium provided as a recording unit for information on the card medium. A communication network 4 connects the card medium authentication device 1 and the card medium read / write device 2. Symbol 5 is
This is a card medium issuing machine used when issuing a card medium. In FIG. 1, the card medium read / write device 2
Are present on the communication network 4, one or more.

The card medium authentication device 1 includes a communication processing unit 11, a card medium information recording unit 12, a transaction information management unit 13, a light reflectance measurement position calculation processing unit 14, and a medium characteristic information management unit 15. And a card medium authentication processing unit 16. The communication processing unit 11 receives the light reflectance read from the optical recording medium provided on the card medium 3 and the identification information of the card medium from the card medium read / write device 2,
The card medium authentication device 1 transmits the characteristic measurement position information of the optical recording medium to the card medium authentication device 1
Is a communication means for transmitting to the card medium read / write device 2 from the. The card medium information recording unit 12 uses the light reflectance measured at a plurality of measurement spots of each card medium 3 as medium characteristic information of the card medium previously recorded on the card medium together with the user's unique information at the time of issuing the card. This is a relational database that records information in association with identification information. Here, the spot is a minimum identification unit for reading data recorded on the optical recording medium. Further, an example of the medium characteristic information recorded in the card medium information recording unit 12 will be described with reference to FIGS. FIG. 2 shows, for each position information of a spot for measuring the light reflectance of the optical recording medium provided on the card medium 3, the input laser light irradiation amount (power display) applied to the optical recording medium when the light reflectance is measured. 3 shows the amount of output laser light reflected by the optical recording medium and the light reflectance (expressed in terms of 100 fractions) indicating the ratio of the output laser light. FIG. 11 shows that the light reflectance read from the card medium for each transaction is held and managed for an arbitrary number of generations at each measurement position.

The transaction information management unit 13 reads out the unique information of the user at the time of issuing the card from the card medium information recording unit 12 based on the identification information of the card medium read from the card medium, and stores the transaction time when the card medium was used. Transaction information is specified together with temporary information such as Here, an example of the transaction information specified by the transaction information management unit 13 will be described with reference to FIG. The transaction information is composed of (1) transaction type, (2) transaction time, (3) transaction balance, and (4) handling machine number as information types to be managed, and the transaction of electronic money issuance as shown in FIG. When did you go, who is the owner of the card and who actually did the transaction with the card? That information is managed. Each piece of information is represented in hexadecimal notation as "data handled by a computer". Thus, the items to be changed for each transaction are reflected in the linear function, and the solution is further reflected as a parameter in the function for calculating track position information, sector position information, and bit position information. Is calculated, the position of the spot where the light reflectance is measured is different for each transaction. A specific method of calculating the position of the spot will be described later.

On the other hand, the light reflectance measurement position calculation processing section 14
Calculates the position of the spot to be measured using a function based on the transaction information specified by the transaction information management unit 12, specifies a plurality of specific measurement positions from the plurality of measurement positions of the light reflectance of the card medium 3, Communication processing unit 11 as characteristic measurement position information
To the card medium read / write device 2 via the. Here, a method of calculating the position information of the measurement spot will be described below.
First, an example of the card medium 3 is shown in FIG. 4 for explaining the measurement spot. In FIG. 4, an optical recording medium 31 for recording identification information of the card medium is provided on the card recording medium 3. Further, the position information of the spot for measuring the light reflectance of the optical recording medium is indicated by circled numbers 1 to N. In FIG. 4, 20 or more N measurement spots are designated. . Here, the letter B encircled is
The bad spot is shown.

Here, a bad spot is a defective portion that has occurred on a medium. If a bad spot exists in a sector where data is to be written, the defective portion is automatically replaced with a replacement sector for a separately prepared replacement area. And is simultaneously recorded in the bad spot management table of the card medium information recording unit 12 of the card medium authentication device 1. This information is transmitted to the card medium authentication device 1 via the card medium read / write device 2 at the time of issuing a card and at the time of a transaction.
Further, a bad spot generated in the manufacturing process is similarly assigned a substitute sector at the time of card initialization. Bad spots can be additionally registered as long as there is a vacancy in the area of the substitute sector. This will be described with reference to the schematic diagram of FIG. 5. The bad spot B-1 of track B and sector 3 and the bad spot B- of track C and sector 5 are described.
Bad spot B-3 of track 2, track D and sector 4
Bad spots registered at the time of card initialization are registered in sector 1 of the replacement area, sector 2 of the replacement area, and sector 3 of the replacement area, respectively. Similarly, the bad spot B-4 of the track B and the sector 7 and the bad spot B-5 of the track E and the sector 4 are bad spots generated during use of the card. 5 is registered. Normally, bad spots are not used because they are defective.
In the present invention, a defective portion is managed as physical information of the card medium by treating the defective portion as unique information of the card, and this characteristic is used. Therefore, this bad spot is also one of the spots for measuring the light reflectance.

Next, a specific method of calculating the position of the spot will be described. "Example of calculating spot position information of all card areas" (1) Function f for calculating track / sector / bit position
In order to give parameters to (x), f (y) and f (z), by giving data whose transaction information fluctuates for each transaction as shown in FIG. 3 to a function f (n) for generating parameters, (A1, b1, c1), (a2, b2, c2),.
··· Generate n random variables for the number of measurement spots in which the solution of (an, bn, cn) is a set of three. An example of a variable generation method is as follows.
Multiplying the transaction balance (568,972 yen) by 10:30:30 on October 19, 000, and the solution (113800
1984108900000) as a basic value, and the square root thereof is obtained three times to obtain a variable.

(Equation 1) a1 = 3337428499, b1 = 58081, c1
= 241. Similarly, the next parameter a
2, b2 and c2 are also a1, b obtained by the previous calculation.
A basic value is derived and obtained by an arbitrary calculation formula such as multiplying the transaction information by 1, c1. This is similarly repeated n times. (2) Next, another function f (x), function f (y), and function f (z) for deriving the measurement spot position on the card medium are prepared.
The functions are f (x), track position information, and f (y), respectively.
Is sector position information, and f (z) is bit position information.

(Equation 2) However, A to L are arbitrary constants. (3) The parameters (a1,
b1, c1), (a2, b2, c2), (a3, b3,
c3)... (an, bn, cn), f (x), f
(Y) and f (z) are substituted to obtain a plurality of track, sector, and bit information at the measurement spot position. For example, l
= A1, m = b1, and n = c1,

(Equation 3) And track position α, sector position β, bit position γ
Is derived. Note that the obtained position information is further divided in order to match the used sector type. For example, in the case of 2500 tracks and 16 bytes × 16 sectors, αβγ is 1 ≦ α ≦ 2500, 1 ≦ β ≦ 1
6, 2500, 1 so as to fall within the range of 1 ≦ γ ≦ 128.
Divide by an integer of 6, 128, and the remaining integer plus one becomes each value. "Calculation of Bad Spot Position Information" The function f (n2) for randomly extracting bad spot positions is obtained by giving the address information of the bad spot management table as a parameter to the spot position calculation function f (n) of all card areas. As in the case of the entire card area, a plurality of bad spot track position information, sector position information, and bit position information are obtained. In calculating the position information of the measurement spot at the time of issuing the card medium, unique information of the card including information on the date and time of issuance of the card is used instead of the transaction date and time instead of the transaction information.

On the other hand, the medium characteristic information management unit 15 calculates the light reflectance read from the card medium during the immediately preceding normal transaction according to the characteristic measurement position information specified by the light reflectance measurement position calculation processing unit 14. Hold and manage for each measurement position. Further, based on the medium characteristic information of the card medium recorded in the card medium information recording unit 12, a designated normal spot,
And the light reflectance of the bad spot is extracted. Further, the card medium information recording unit 12 includes a history management unit.
The history management unit, for the light reflectance of the bad spot,
The light reflectance read from the card medium during the immediately preceding normal transaction and the light reflectance read from the card medium during the immediately preceding normal transaction are held and managed for each measurement position. The history management of the light reflectance of the bad spot is as follows.
Any number of generations may be held and managed as long as one or more generations before a normal transaction. In addition, the history of the light reflectance of normal spots is used for online authentication only using the light reflectance read from the card medium during the previous normal transaction, but the card medium is inspected in detail offline. -Any number of generations may be held and managed for authentication. In addition, the recording of the light reflectance measurement position information may be performed by recording and managing the position information itself, or by recording and managing the unique information of the card medium for calculating the position information and the transaction information. Alternatively, the light reflectance measurement position information may be calculated each time.

The card medium authentication processing section 16 reads the light reflectance read from the card medium in accordance with the characteristic measurement position information transmitted by the light reflectance measurement position calculation processing section 14 (representing the medium reflectance information and the medium characteristic information shown in FIG. 2). The medium information management unit 15 authenticates the card medium by comparing the same with the light reflectance extracted from the medium characteristic information of the card medium. In addition, the card medium authentication processing unit 16 determines the light reflectance of the measurement spot and the bad spot read from the card medium in this transaction, and the light reflection extracted by the medium property information management unit 15 from the medium property information of the card medium. If it is judged that there is a slight difference of about 1 point in the rate, the light reflectance of the bad spot at the time of the previous two normal transactions recorded as history and the same bad of the card medium used this time The card medium is authenticated by comparison with the light reflectance of the spot. Details of the card medium authentication method will be described later.

The card medium read / write device 2 comprises an optical system processing unit 21, a recorded content reading / writing unit 22, a communication processing unit 23, and a light reflectance measurement processing unit 24. At the time of writing, the optical system processing unit 21 writes information on an optical recording medium provided on a card medium by using a laser beam.
At the time of reading, an optical sensor is used to read the card medium 3.
Converts the laser light reflected from the optical recording medium provided in the device into an electric signal. Here, the method of reading from and writing to the optical recording medium by the optical processing unit 21 may be any of the optical transformation method and the optical phase method. The recorded content read / write unit 22 is a processing unit that reads and writes information recorded on the card medium, and sends an electrical signal indicating the content to be written as a binary digital signal to the optical system processing unit 21 at the time of writing. Also,
At the time of reading, the electrical signal received from the optical processing unit 21 is converted into a binary digital signal by a binary determination. The communication processing unit 23 receives the characteristic measurement position information specifying the position of the spot for measuring the light reflectance from the card medium authentication device 1 and determines the light reflectance measured according to the characteristic measurement position information. Send to The light reflectance measurement processing unit 24 measures the light reflectance of the spot designated by the characteristic measurement position information of the optical recording medium via the optical system processing unit 21.

The card medium information storage unit 12 of the card medium authentication device 1 stores a non-volatile memory such as a hard disk device, a magneto-optical disk device, a flash memory, or the like.
Read-only recording medium such as D-ROM, RAM
(Random Access Memory), or a computer-readable and writable recording medium using a combination thereof.

The communication processing unit 11, the transaction information management unit 13, the light reflectance measurement position calculation processing unit 14, the medium characteristic information management unit 15, the card medium authentication processing unit 16, The optical system processing unit 21, the recorded content read / write unit 22, the communication processing unit 23, and the light reflectance measurement processing unit 24 of the card medium read / write device 2 are respectively configured by the card medium authentication device 1 or the card medium read / write device 2. , May be realized by dedicated hardware, a memory and a CPU (Central Processing Unit)
And a program for realizing the function of each unit described above may be loaded into a memory and executed to realize the function.

It is assumed that an input device, a display device, and the like (both not shown) are connected to the card medium authentication device 1 and the card medium read / write device 2 as peripheral devices. Here, the input device refers to an input device such as a keyboard and a mouse. A display device is a CRT (Cathode
Ray Tube) means a display device or a liquid crystal display device.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIGS. First, the storage state of the card medium and the method of managing the card medium information recording unit of the card medium authentication apparatus 1 will be described with reference to the schematic diagram of FIG. In FIG. 11, the card medium information recording unit of the card medium authentication device 1 performs generation management of measurement information for each card medium in a card database. As the generation management of the measurement information, the following two pairs are managed. (1) Position information (track / sector / bit) of a spot measured for the entire card area and light reflectance at that position are managed as a pair. (2) The position information (track / sector / bit) of the spot measured only for the bad spot and the light reflectance at that position are managed as a pair. FIG. 11 shows that the above information is recorded for each card from the latest generation A to the -n generation for the measurement spot information of the entire card area and from the latest generation B to the -n generation for the bad spot information.

Next, the flow of the operation will be described with reference to the drawings. FIG. 6 is a sequence diagram illustrating a card issuing procedure according to the present embodiment. In FIG. 6, first, the card medium issuing machine 5 performs initialization processing of an optical medium such as registration of a bad spot generated in a manufacturing process in a management table and initialization of an information recording unit of a card (step S1). . When the initialization of the optical medium is completed, the card medium issuing machine 5
Gives the user card-specific information (card ID, owner I
D, issue date, etc.) (step S2). Next, the input card-specific information and the like are transmitted to the card medium authentication device 1 (step S3). The card medium authentication device 1 that has received the card unique information performs a card issuance business process (step S4), and transmits the card issuance information to the card medium issuing machine 5 (step S5). After receiving the card issuance information, the card medium issuing machine 5 performs a card medium creation process such as writing the card issuance information on the new card medium 3 (step S6). The bad spot management information is transmitted to the device 1 (Step S7). Next, in the card medium authentication device 1, the light reflectance measurement position information calculation processing unit 14 uses the card unique information (card ID, owner ID, date and time of issuance, etc.) and bad spot management information as the light reflectance measurement position. Is given to the above-mentioned functions f (n) and f (n2) for calculating
Based on the solution, measurement position information is calculated (step S8),
The data is transmitted to the card medium issuing machine 5 (step S9). The card medium issuing machine 5 having received the light reflectance measurement position information sets the light reflectance at the designated measurement position of the card medium 3 to, for example, the measurement spots 1 to n and the bad spots B1 to B1 of the card 1 as shown in FIG. The measurement is performed for each bit of Bn (step S1).
0), and transmits the measured light reflectance to the card medium authentication device 1 (step S11). The card medium authentication device 1 that has received the light reflectance measured by the card medium issuing machine 5,
In the medium characteristic information management unit 15, the physical light reflectance of the optical medium of the newly issued card is measured as the medium characteristic information of the card medium together with the card-specific information for the entire card area as shown in FIG. The obtained spot position information (track sector bits) and the spot position information (track sector bits) measured only for the bad spot are paired with the light reflectance at that position, and the card medium information recording unit 12 is used. (Step S12). When the registration of the new card information ends normally, a normal registration completion notice is transmitted to the card medium issuing machine 5 (step S13), and the new card medium issuing process ends (step S14).

FIG. 7 is a sequence diagram for explaining the operation of card medium authentication in the case where card medium authentication has succeeded in the present embodiment. First, when the card medium 3 is inserted in order to perform business transactions, the card medium read / write device 2 sends the light reflectance measurement processing unit 24 to the card medium authentication device 1 to obtain the light obtained at the end of the previous normal transaction. Request the reflectance measurement position information (step S21). In the card medium authentication apparatus 1 that was requested for the previous light reflectance measurement position information, the medium property information management unit 15 uses the card database to execute the last successfully completed transaction shown as (previous A) and (previous B) in FIG. Is extracted (step S22), and the spot position information (track / sector / bit) is transmitted to the card medium read / write device 2 (step S23). In the card medium read / write device 2 that has received the previous light reflectance measurement position information, the light reflectance measurement processing unit 24 uses the optical system processing unit 21 to determine the light reflectance of the card medium 3 at the designated measurement position in FIG. As shown in, for example, the measurement spots 1 to n of the card 1 and the bad spots B1 to B1
The measurement is performed for each bit of Bn (step S24), and the measured light reflectance is transmitted to the card medium authentication device 1 (step S25). The card medium authentication device 1 having received the light reflectance measured at the previous light reflectance measurement position causes the card medium authentication processing unit 16 to perform the light reflectance measurement shown as (previous A) and (previous B) in FIG. The light reflectance at the position is compared with the light reflectance received from the card medium read / write device 2 and measured for each bit of, for example, the measurement spots 1 to n and the bad spots B1 to Bn of the card 1 to determine the card medium 3. The process is executed (Step S26). The details of the card determination process will be described later.

If the card medium 3 is authenticated as a normal card, the card medium 3 is notified to the card medium read / write device 2 that the card medium 3 has been normally authenticated (step S27).
The card medium read / write device 2 that has been notified that the card medium 3 has been normally authenticated starts a business transaction using the requested card medium 3 (step S28), and inputs the transaction input information at that time to the card medium authentication device 1 (Step S29). Card medium authentication device 1 that has received transaction information
Performs the center online business process corresponding to the business transaction (step S30). On the other hand, the card medium read / write device 2 writes the contents of the business transaction on the card medium (step S31). In the card medium authentication device 1, the light reflectance measurement position information calculation processing section 14 shows (the latest generation A) and (the latest generation B) in FIG. 11 based on the current transaction information and the received bad spot management information. The measurement spot position (track sector bit) is calculated as a new light reflectance measurement position (step S32). On the other hand, in step S31, the card medium read / write device 2 that has written the contents of the business transaction on the card medium 3 transmits a light reflectance measurement position information issuance request to the card medium authentication device 1 (step S33), and ends the business transaction. Yes (Step S3
4). The card medium authentication device 1 that has received the light reflectance measurement position information issuance request transmits the light reflectance measurement position information calculated in step S32 to the card medium reading / writing device 2 (step S35). The card medium read / write device 2 that has received the light reflectance measurement position information measures the light reflectance specified by the light reflectance measurement position based on the current transaction information from the card medium 3 in the light reflectance measurement processing unit 24. (Step S36), and transmits to the card medium authentication device 1 (Step S37). The card medium authentication device 1 that has received the light reflectance measured at the light reflectance measurement position based on the transaction information of this time is stored in the medium characteristic information management unit 15 in FIG.
1 shows the physical light reflectance of the optical medium for each measurement spot position (track sector bit) generated for each transaction, indicated as (latest generation A) and (latest generation B), and the medium characteristics of the card medium. The information is registered in the card database of the card medium information recording unit 12 (step S38). And if you can register the history information normally,
A normal completion notification is transmitted to the card medium read / write device 2 (step S39). The card medium read / write device 2 that has received the normal completion notification ends the processing and ejects the card medium (step S38).

Next, a detailed operation at the time of card authentication in the card medium authentication processing section 16 will be described. FIG. 8 is a flowchart illustrating the operation of the card medium authentication processing unit 16 of the card medium read / write device 1 during card authentication. In FIG. 8, when the light reflectance measured by the previous light reflectance measurement position information is received (step S41), the medium property information management unit 15 performs the operation according to the light reflectance measurement position information extracted from the card medium information recording unit 12. Then, the light reflectance at the previous measurement position is acquired from the card medium information recording unit 12 (step S42). Here, the reason for managing the light reflectance at each measurement position is that the amount of light reflection varies depending on the measurement conditions as shown in FIG. When the laser light output when measuring the light reflection amount of the card medium 3 is high, the light reflection amount is large, and when the laser light output when measuring the light reflection amount of the card medium 3 is low, the light reflection amount is small. Therefore, by determining the light reflectance for each measurement position, it is determined whether or not the two light reflectances can be considered to be relatively equal. Next, the obtained light reflectance is compared with a predetermined light reflectance allowable value (step S43). First, it is determined whether the light reflectance of both the normal spot and the bad spot satisfies the allowable value. Is determined (step S44). Here, the allowable value is within ± 2 to 3% in consideration of changes in measurement conditions and the like. If the light reflectance of both the normal spot and the bad spot satisfies the allowable value in step S44 (YES in step S44), the card is authenticated as a normal card, and the card medium is normally authenticated. The notification is sent to the card medium read / write device 2 (step S45). This operation corresponds to step S27 in FIG.

If it is determined in step S44 that the light reflectance of the normal spot does not satisfy the allowable value (NO in step S44), one or both of the normal spot and the bad spot are abnormal in measurement. Therefore, in order to more reliably perform authentication, the light reflectance is measured from the position information of the bad spot at the time of the last transaction (the previous transaction that has been completed normally) and compared with the recorded light reflectance (step S46). . Then, it is determined whether or not the light reflectance of the bad spot measured at the time of the last two transactions satisfies the allowable value (step S47). If the light reflectance of the bad spot two times before satisfies the allowable value in step S47 (YES in step S47), the card medium is authenticated as a normal card, and the process proceeds to step S45. Is notified to the card medium read / write device 2 that has been successfully authenticated. Also, if step S47
In the case where the light reflectance of the bad spot two times before does not satisfy the allowable value (NO in step S47), it is determined that the card medium is an abnormal card medium that is copied or the like, and the card medium is determined. Is stopped (step S48). In this case, step S26 in FIG.
In, the transaction and business processing using the card medium are stopped, and the subsequent processing is not executed.

Here, the above operation will be described in detail with reference to FIG. First, when the transaction 1 is completed successfully,
It is assumed that the light reflectance of the normal spot and the bad spots B-1 and B-2 shown in FIG. 10A is measured based on the transaction information at that time, and recorded as history information. Next, similarly, when the transaction 2 is normally completed, the light reflectance of the normal spot and the bad spots B-3 and B-4 shown in FIG. It is assumed that information is recorded. Then, at the time of card authentication of the transaction 3, if the normal spot and the bad spots B-3 and B-4 are given as the previous light reflectance measurement position information and the light reflectance is measured, FIG. It is assumed that the light reflectance of the normal spot is in error as shown in FIG. In this case, since one of the measured light reflectances of the normal spot and the bad spot is an error, the bad spot B-1 measured in the last transaction (the previous transaction 1 for the normal transaction versus the transaction 2 in the normal transaction), B
-2 is measured again, and the card medium is authenticated from the light reflectance of the bad spots B-1 and B-2 as the history information registered in the transaction 1, and the light reflectance satisfies the allowable value. If so, the card medium is determined to be a normal card. If the light reflectance does not satisfy the allowable value even in the measurement of the bad spot two times before, it is determined that the card medium is an abnormal card that is copied or the like, and a transaction using this card is performed. Abort.

In the above-described embodiment, a case has been described in which an optical storage medium is used as a recording unit for information on a card medium, and the optical recording medium is also used for authentication of the card medium itself by measuring light reflectance. However, for a card such as a magnetic card or an IC card using an IC chip, which has a recording section for information other than an optical recording medium, an optical recording medium is provided separately from the information recording section, It may be used for its own authentication.

In the above description, it is determined that one of the normal spot and the bad spot is abnormal in measurement, and
The light reflectivity used for more reliable authentication is the light reflectivity of the bad spot measured at the time of the last transaction (the last successful transaction), but this is usually the content where the spot is recorded. May be rewritten. This is because if the recorded content is rewritten from "0" to "1" or from "1" to "0" in binary notation, the light reflectance also changes and cannot be used as history information. If the recorded content of the normal spot is rewritten in the above-mentioned transaction 2, it cannot be used for authentication in transaction 3. However, when an optical recording medium is provided separately from the information recording section and used for authentication of the card itself, or in the case of a read-only card medium in which the recorded content of the card medium does not change, only the bad spot is used. Not
The normal spot may also be used as a measurement spot for recovery when a minor error of about one point occurs.

The function for calculating the position for measuring the light reflectance is managed for each card, and for each card,
Alternatively, it may be changed for each transaction. Further, the number of spots to be measured may be managed for each card, and the number may be changed for each card or each transaction.

The card medium authentication device 1, card medium read / write device 2, and card medium issuing machine 5 shown in FIG. 1 described above record a program for realizing their functions on a computer-readable recording medium. Then, the functions of the above-described devices may be realized by causing a computer system to read and execute the program recorded on the recording medium.

Here, the "computer system" includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a portable medium such as a floppy (registered trademark) disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in a computer system. . Further, a “computer-readable recording medium” refers to a medium that dynamically stores a program for a short time, such as transmitting a program via a computer network such as the Internet or a communication line such as a telephone line. (Transmission medium or transmission wave), in which case a program holding a program for a certain period of time, such as a volatile memory in a computer system serving as a server or a client, is also included.

The above-mentioned program may be for realizing a part of the above-mentioned functions, and may be for realizing the above-mentioned functions in combination with a program already stored in the computer system, that is, a so-called program. It may be a difference file (difference program).

[0040]

As described above, according to the present invention, in a card medium authentication apparatus for authenticating a card medium itself having an optical recording medium for recording information by light, a plurality of measurement positions of the light reflectance of the card medium are provided. From, a plurality of specific measurement positions are specified, a light reflectance measurement position calculation means for transmitting as characteristic measurement position information, and a plurality of light measurement units for each card medium according to the characteristic measurement position information specified by the light reflectance measurement position calculation means. Card medium information recording means for recording the light reflectance measured for each past normal transaction at the measurement position as medium characteristic information in association with information specifying the card medium, and a card recorded in the card medium information recording means A medium characteristic information management unit for extracting the light reflectance at a position measured during a past normal transaction from the medium characteristic information of the medium; A card medium authenticating means for authenticating the card medium itself by comparing the light reflectance extracted from the information and the light reflectance read from the same position of the card medium, and certifying the card medium itself; did. As a result, it is possible to authenticate the card medium itself by recording and managing optical reflectances having different characteristics for each optical recording medium as comparable to a human fingerprint, and when used together with a fingerprint or voiceprint, Further strong authentication can be realized.

According to the present invention, in the above-mentioned card medium authentication apparatus, when the information for specifying the card medium is the identification information of the card medium recorded on the card medium, the card medium information recording means outputs the card medium identification information to the identification information of the card medium. The card information authenticating device further records the unique information of the user at the time of issuing the card, and the card medium authentication device reads the unique information of the user at the time of issuing the card from the card medium information recording means according to the identification information of the card medium read from the card medium. Further includes transaction information management means for specifying transaction information together with temporary information such as transaction time when the card medium was used, and the light reflectance measurement position calculation means uses the transaction information specified by the transaction information management means. ,
A plurality of specific measurement positions are calculated from the plurality of measurement positions of the light reflectance of the card medium. This makes it possible to randomly obtain information on the measurement position for measuring the light reflectance for each transaction using the card medium.

According to the present invention, in the above card medium authentication apparatus, the card medium information recording means stores and manages the light reflectance read from the card medium for each transaction for an arbitrary number of generations at each measurement position. The card medium authentication unit considers that the light reflectance read from the card medium is the same as the light reflectance extracted from the medium characteristic information of the card medium by the medium property information management means. If not, by comparing the light reflectance read from the card medium with the light reflectance of the same measurement position read from the card medium in a further past managed by the card medium information recording means, the card medium is read. It is configured to authenticate itself. In addition, the further past light reflectance to compare is
The light reflectance of a defective portion that is not used for recording information on the optical recording medium was taken. As a result, even in a card medium for reading and writing, measurement data of light reflectance can be held and stored for an arbitrary number of generations.
If the credibility of the data measured and measured now is doubtful due to the deterioration of the characteristics of the optical recording medium provided on the card medium due to aging, the data is now measured by comparing with the past data retained and managed. It is possible to confirm the authenticity of the data and eliminate the influence of the characteristic deterioration.

Therefore, the optical recording medium is attached to the card,
By measuring and managing the light reflectance from a plurality of measurement positions for each card medium and managing the card as medium characteristic information for authenticating the card, it is easy to detect a copy card, and a magnetic card / IC card / optical IC hybrid can be detected. An effect is obtained that a security function can be secured for all card media such as cards.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating an example of medium characteristic information recorded in the embodiment.

FIG. 3 is a schematic diagram illustrating an example of transaction information handled in the embodiment.

FIG. 4 is a schematic diagram illustrating an example of a card medium handled in the embodiment.

FIG. 5 is a schematic diagram illustrating a method for managing spots on a card medium handled in the embodiment.

FIG. 6 is a sequence diagram illustrating a card issuing procedure according to the embodiment.

FIG. 7 is a sequence diagram illustrating an operation of card medium authentication in the case where card medium authentication is successful in the embodiment.

FIG. 8 is a flowchart describing in detail the operation of the card medium read / write device of the embodiment during card authentication.

FIG. 9 is a schematic diagram illustrating an example of measurement of reflectivity according to a difference in output of a semiconductor laser in the embodiment.

FIG. 10 is a schematic diagram illustrating a measurement example of light reflectance according to the embodiment.

FIG. 11 is a schematic diagram illustrating a storage state of a card medium and a management method of a card medium information recording unit of the card medium authentication device according to the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 card medium authentication device 2 card medium read / write device 3 card medium 4 communication network 5 card medium issuing machine 11 communication processing unit 12 card medium information recording unit 13 transaction information management unit 14 light reflectance measurement position calculation processing unit 15 medium characteristic information management Unit 16 card medium authentication processing unit 21 optical system processing unit 22 recorded content read / write unit 23 communication processing unit 24 light reflectance measurement processing unit 31 optical recording medium

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06K 19/10 G06K 19/00 C G11B 7/0033 R (72) Inventor Yasushi Togashi Toyosu Toyosu, Koto-ku, Tokyo 3-3-3 F-term in NTT Data Corporation (reference) 2C005 HA04 HB09 JA12 KA31 LB15 5B035 AA15 BB03 5B058 CA33 KA32 5D090 AA03 CC14 CC18 FF09 HH02 JJ01

Claims (10)

[Claims] 1. A card medium authentication device for authenticating a card medium itself having an optical recording medium for recording information by light, comprising: a plurality of specific positions from a plurality of measurement positions of light reflectance of the card medium. A light reflectance measurement position calculation unit that specifies a measurement position and transmits as characteristic measurement position information, and a plurality of measurement positions for each card medium according to the characteristic measurement position information specified by the light reflectance measurement position calculation unit.
Card medium information recording means for recording the light reflectance measured for each past normal transaction as medium characteristic information in association with information specifying the card medium; and the card medium recorded in the card medium information recording means Medium characteristic information management means for extracting a light reflectance at a position measured at the time of a past normal transaction from the medium characteristic information of the card medium information management means, and the medium characteristic information management means of the card medium recorded in the card medium information recording means Card medium authentication means for authenticating the card medium itself by comparing the light reflectance extracted from the medium characteristic information with the light reflectance read from the same position of the card medium. Card media authentication device. 2. When the information for specifying the card medium is identification information of the card medium recorded on the card medium, the card medium authentication device identifies the card medium read from the card medium. From the card medium information recording means, the card medium information recording means reads out the unique information at the time of card issuance of the user, which is recorded in association with the identification information of the card medium, and the transaction using the card medium The system further includes transaction information management means for specifying transaction information in combination with temporary information such as time, and the light reflectance measurement position calculation means uses the transaction information specified by the transaction information management means to determine the light reflectance of the card medium. A plurality of specific measurement positions are calculated from the plurality of measurement positions. 3. The card medium information recording unit further includes a measurement data history management unit that holds and manages the light reflectance read from the card medium for each transaction for an arbitrary number of generations at each measurement position. The card medium authentication unit may have the same light reflectance read from the card medium and the same light reflectance extracted from the medium characteristic information recorded on the card medium information recording unit by the medium characteristic information management unit. If it cannot be considered that there is, the light reflectance read from the card medium, the light reflectance of the same measurement position read from the card medium in a further past managed by the card medium information recording means and 3. The card medium authentication device according to claim 1, wherein the authentication of the card medium itself is performed by comparing. 4. The method according to claim 1, wherein the card medium authentication unit determines that the light reflectance read from the card medium is the same as the light reflectance extracted from the medium characteristic information of the card medium by the medium characteristic information management unit. 4. The card according to claim 3, wherein the further past light reflectance to be compared when it cannot be regarded is a light reflectance of a defective portion which is not used for information recording of the optical recording medium. Media authentication device. 5. A card medium authentication device according to any one of claims 1 to 4, which reads the recorded contents of the card medium and the light reflectance of an optical recording medium provided on the card medium and transmits the read data. What is claimed is: 1. A card medium reading / writing apparatus provided with an optical processing unit, comprising: a characteristic measuring position information specifying a position at which a light reflectance is measured is received from the card medium authenticating apparatus; Communication means for transmitting a reflectance to the card medium authentication device; and a light reflectance measurement for measuring a light reflectance of the optical recording medium at a position designated by the characteristic measurement position information via a processing unit of the optical system. Means, and a card medium reading / writing device characterized by comprising: 6. A card medium to be read and written by the card medium read / write device according to claim 5, wherein the card medium is provided as an information recording section on the card medium or separately from the information recording section on the card medium. A card medium having at least one of the provided optical recording media. 7. A card copy crime prevention system which authenticates a card medium itself from medium characteristic information of an optical recording medium provided on the card medium, wherein the card copy crime prevention system according to any one of claims 1 to 4. A card copy crime prevention system, comprising: a card medium authentication device; and the card medium read / write device according to claim 5. 8. A card medium authentication method for authenticating a card medium itself having an optical recording medium for recording information by light, wherein a plurality of specific measurement positions of the light reflectance of the card medium are determined. A light reflectance measurement position calculation process for designating a measurement position and transmitting as characteristic measurement position information, and a plurality of measurement positions for each card medium according to the characteristic measurement position information specified in the light reflectance measurement position calculation process,
Card medium information recording processing for recording the light reflectance measured for each past normal transaction as medium characteristic information in association with information for specifying the card medium; and the card medium recorded in the card medium information recording processing From the medium characteristic information, a medium characteristic information management process of extracting a light reflectance at a designated position; a light reflectance extracted from the medium characteristic information of the card medium by the medium characteristic information management process; A card medium authentication process for authenticating the card medium itself by comparing with the light reflectance read from the same position. 9. When the information for specifying the card medium is identification information of the card medium recorded on the card medium, the card medium authentication method includes identifying the card medium read from the card medium. From the card medium information recording means, the card medium information recording means reads out the unique information at the time of card issuance of the user, which is recorded in association with the identification information of the card medium, and the transaction using the card medium The method further includes a transaction information management process for specifying transaction information in combination with temporary information such as time, and the light reflectance measurement position calculation unit calculates the light reflectance of the card medium by using the transaction information specified by the transaction information management unit. 9. The card medium authentication method according to claim 8, wherein a plurality of specific measurement positions are calculated from the plurality of measurement positions. 10. A card executed together with the card medium authentication method according to claim 8, wherein said card medium reads information recorded on the card medium and medium characteristic information of an optical recording medium provided on the card medium and transmits the information. A medium reading / writing method, comprising: a communication process of receiving characteristic measurement position information specifying a position at which light reflectance is to be measured, and transmitting the light reflectance measured according to the characteristic measurement position information; A light reflectance measuring process for measuring the light reflectance of the optical recording medium at the set position.