JP2020082679A - Authenticity determination system, authenticity determination method, and print inspection device - Google Patents

Abstract

To perform authenticity determination of print material accurately and at low cost.SOLUTION: Authenticity determination is performed on print material whose substrate has light discoloration ink printed dot-matrix-like on its face. An operation terminal sends identification information of the print material subject to the authenticity determination to a server device. The server device determines irradiation pattern of the ink discoloration light. A detection device irradiates the print material with ink discoloration light in this irradiation pattern and detects the first discoloration pattern of the light discoloration ink. The server device calculates the second discoloration pattern of the light discoloration ink when the ink pattern printed on the print material is irradiated with ink discoloration light in this irradiation pattern, compares the first discoloration pattern and the second discoloration pattern, and determines the authenticity of the print material based on the results of the comparison.SELECTED DRAWING: Figure 1

Description

The present invention relates to an authenticity determination system, an authenticity determination method, and a printed matter inspection device.

A cash card is used when withdrawing cash by operating an ATM (Automatic Teller Machine) at a financial institution or the like. At present, a method of performing authentication by inserting a cash card in which information such as an account number and the like is recorded as magnetic information into a magnetic stripe and inserting a 4-digit personal identification number into the ATM is widely used.

The magnetic information can be easily read or written with a card reader or the like. Therefore, there is a case where a counterfeit card which is indistinguishable from an authentic card when viewed from the ATM is produced by taking out the information from the authentic cash card and recording it on another card and illegally using it.

As a measure against such unauthorized use of a card, there is known an IC chip built-in card in which an IC chip is mounted on the main body of a magnetic stripe card and different key information is recorded in the IC chip for each card. Further, some financial institutions have adopted a biometric authentication card in which information used for biometric authentication such as a finger vein pattern is recorded on an IC chip. However, there is a problem that the IC chip is expensive and the card is expensive to manufacture. Further, there is a problem that the card cannot be used when the IC chip is physically and electrically destroyed and fails.

JP 2004-262015 A

The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide an authenticity determination system and an authenticity determination method that can accurately and inexpensively determine the authenticity of a printed matter. Another object of the present invention is to provide an inspection device for printed matter.

The authenticity determination system according to the present invention is an authenticity determination system for a printed matter in which a photochromic ink is printed in a dot matrix on one surface of a base material, and for each of a plurality of printed matter, identification information of the printed matter and Irradiation of ink discoloration light for irradiating a print object to be authenticated by storing print object information associated with the ink pattern of the photochromic ink being printed and a plurality of irradiation pattern information of ink discoloration light. A server device that determines a pattern, transmits identification information of the print object for authenticity determination to the server device, and from the server device, an operation terminal that obtains the determined irradiation pattern, and the photochromic ink of the print object. A detector that irradiates the ink discoloration light with an irradiation pattern acquired by the operation terminal from the server device and detects a first discoloration pattern of the light discoloration ink, wherein the operation terminal includes the first discoloration pattern. Information is transmitted to the server device, the server device refers to the printed matter information, and irradiates the ink pattern corresponding to the identification information received from the operation terminal with the ink discoloration light in the determined irradiation pattern. In this case, the second color change pattern of the photo color change ink is calculated, the first color change pattern received from the operation terminal is compared with the second color change pattern, and the authenticity of the printed matter is determined based on the comparison result. It is a thing.

In one aspect of the present invention, the ink patterns of the plurality of prints registered in the print information are different from each other.

In one aspect of the present invention, the security code of each print is registered in the print information, and the operation terminal accepts the input of the security code and transmits the input security code to the server device. The server device compares the security code received from the operation terminal with the security code registered in the print object information.

In one aspect of the present invention, the server device determines an irradiation pattern of ink discoloration light to be applied to a print object to be authenticated, based on a security code received from the operation terminal.

In one aspect of the present invention, the server device randomly determines an irradiation pattern of ink discoloration light to be applied to a print object for authenticity determination, from the plurality of irradiation pattern information.

In one aspect of the present invention, the portion where the detector irradiates the ink discoloration light includes a region where the photodiscoloration ink is not printed.

In one aspect of the present invention, the printed matter is printed with a non-photochromic ink whose hue does not change by irradiation with the ink colorchanging light so as to surround the photochromic ink, and before the irradiation with the ink color changing light. The above photochromic ink is the same color as the above nonphotochromic ink.

In one aspect of the present invention, the detector includes a plurality of light emitting elements that are arranged in a matrix and emit the ink color changing light.

In one aspect of the present invention, the photochromic ink is a thermochromic ink whose hue changes at a predetermined temperature, and the ink colorchanging light is infrared light.

In one aspect of the present invention, the temperature indicating ink contains an infrared absorbing material.

The authenticity determination method of the present invention is an authenticity determination method for a printed matter in which the photochromic ink is printed in a dot matrix on one surface of the base material, and the operation terminal displays the identification information of the authenticity determination target printed matter. A step of transmitting to the server device, a step of determining the irradiation pattern of the ink color changing light by the server device, and a detector irradiating the light color changing ink of the print object with the ink color changing light by the irradiation pattern, The step of detecting the first color change pattern of the photochromic ink, and the server device, wherein the server device associates the identification information of the print item with the ink pattern of the photochromic ink that is printed. Referring to the object information, the ink pattern corresponding to the identification information received from the operation terminal is calculated as the second color change pattern of the photo color change ink when the color change light is irradiated with the irradiation pattern, and the detector detects Comparing the detected first color change pattern and the second color change pattern, and determining the authenticity of the printed matter based on the comparison result.

The printed matter inspection apparatus of the present invention is a printed matter inspection apparatus used for authenticity determination of a printed matter in which photochromic ink is printed in a dot matrix shape on one surface of a substrate, and the printed matter to be authenticity determination target. To the server device, the operation terminal that acquires the irradiation pattern of the ink discoloration light from the server device, and the irradiation pattern that the operation terminal acquired from the server device to the light discoloration ink of the printed matter. And a detector that detects the color change pattern of the light color change ink by irradiating the ink color change light with, and the operation terminal transmits information about the color change pattern to the server device.

According to the present invention, the authenticity of a printed matter can be accurately determined at low cost.

It is a top view of the card concerning the embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. 3A is a diagram showing an example of an ink pattern, and FIG. 3B is a diagram showing an example of a color change pattern. It is a schematic block diagram of the authenticity determination system which concerns on the same embodiment. It is a schematic block diagram of a color change pattern detector. It is a functional block diagram of an operating terminal. It is a functional block diagram of a server apparatus. 8A to 8C are diagrams showing examples of color change patterns and determination results. It is a flow explaining the authenticity determination method according to the embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a card 1 according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1 (a schematic diagram of a part of the section). The card 1 is, for example, a cash card, and an ink pattern IP using the temperature indicating ink 13 and the normal ink 14 is printed in a predetermined region R on one surface of the base material 10.

A heat insulating layer 12 is laminated on one surface of the base material 10. In the predetermined region R, the temperature indicating ink 13 and the normal ink 14 are printed on the heat insulating layer 12, and in the regions other than the predetermined region R, the normal ink 14 is printed on the heat insulating layer 12 so as to cover the temperature indicating ink 13 and the normal ink 14. The protective layer 15 is formed on the.

In the predetermined region R, the ink pattern IP may be formed by thermally transferring a heat-sensitive material containing a coloring material such as a dye or a pigment and a heat-sensitive material containing a temperature-sensitive ink to the intermediate transfer medium and then re-transferring it. In areas other than the predetermined region R, a heat-sensitive material containing a coloring material such as a dye or a pigment may be thermally transferred onto the intermediate transfer medium and then retransferred to form characters or images. The predetermined region R and the portion other than the predetermined region R may be formed separately or may be formed at the same time. For example, in the predetermined area R, an account number, a cardholder's name, and a face image are formed. These characters and images may be formed on the surface of the base material 10 opposite to the surface on which the ink pattern IP is provided.

The base material 10 is made of a synthetic resin such as polyvinyl chloride, polyester, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, polystyrene, acrylic resin, polypropylene or polyethylene as a base material. An IC chip may be embedded in the base material 10.

The heat insulating layer 12 prevents heat loss due to heat transfer to the base material 10 or the like when the ink pattern IP is heated as described later, and is, for example, a porous layer formed of a layer containing hollow particles. Can be used. The heat insulating layer 12 may be omitted, and the temperature indicating ink 13 and the normal ink 14 may be printed on the substrate 10.

The protective layer 15 is made of a transparent resin material. As the material of the protective layer 15, for example, polyester such as polyethylene terephthalate, polyolefin such as cycloolefin polymer, cellulose resin such as triacetyl cellulose, acrylic resin, polycarbonate or the like can be used.

The temperature indicating ink 13 is a substance whose hue changes depending on the temperature. For example, the temperature indicating ink 13 is colored at a predetermined temperature or lower and becomes colorless (decolored) at a temperature higher than the predetermined temperature. The characteristics of the temperature indicating ink vary depending on the material, and there are some which have a first color below a predetermined temperature and a second color which is different from the first color above a predetermined temperature. Further, there is also a temperature indicating ink that becomes colorless at a predetermined temperature or lower and becomes colored at a temperature higher than the predetermined temperature. As for the temperature indicating ink, there is an ink whose color change is irreversible with temperature, but in the present embodiment, an ink whose color change is reversible with temperature is used.

As the temperature indicating ink, leuco dye type ink, liquid crystal type ink, inorganic compound type ink and the like can be used.

Examples of the leuco dye-based ink include those made into an ink using a mixture of a leuco dye, a color-developing/reducing agent, and a solvent. Examples of leuco dyes include crystal violet lactone.

Examples of liquid crystal inks include those in which cholesteric liquid crystal is enclosed in a shell of microcapsules and used as a pigment to form an ink.

Examples of the inorganic compound-based ink include an ink formed by using a heavy metal iodide such as Hg, Ag, Cu, or Pb, or a complex salt thereof as a pigment.

The normal ink 14 is an ink whose hue does not change even when the temperature changes.

In the present embodiment, the temperature-sensitive ink 13 is printed in a plurality of locations in a matrix (dot matrix), and the normal ink 14 is printed in a region other than the portion where the temperature-sensitive ink 13 is printed in the region R so as to surround the temperature-sensitive ink 13. .. The temperature-sensitive ink 13 printed in a matrix has one or more missing parts, and the missing parts (the number of missing parts, the missing position) are different for each card. Therefore, the ink pattern IP is a pattern unique to each card 1. For example, the ink pattern IP is printed on demand by a thermal transfer method.

An example of the ink pattern IP is shown in FIG. 3a. In this example, in the matrix of 4 columns vertically (A to D) and 5 columns horizontally (I to V), 5 points I_B, II-C, III-A, IV_D, and V_B are missing, and 15 points other than that are missing. The temperature indicating ink 13 is printed. Note that the grid-like broken lines are for convenience of description and are not printed on the actual card 1.

For example, the temperature-sensitive ink 13 has the same color as the normal ink 14 at room temperature (room temperature), and changes to a colorless (decolored) state when heated above the temperature T. Here, the same color means that the color difference ΔE ^* ab which is the difference (distance) between the two colors is 1.6 or less, preferably 0.8 or less, and 0.4 or less. Is more preferable.

Therefore, in the card 1 on which the temperature-sensitive ink 13 and the normal ink 14 are printed, below the temperature T, the temperature-sensitive ink 13 has the same color as the surrounding normal ink 14, and the entire area R has the same color, and the ink pattern IP. Is not visible.

In this embodiment, when the security code is input from the cardholder, the area R is heated in a pattern corresponding to the input security code. Based on the color change pattern of the temperature indicating ink 13 after heating of the region R (the number and position of the color changing temperature indicating ink 13), it is determined whether the card 1 is a genuine card or a forged card.

For example, as shown in FIG. 3b, four points I_B, II-A, IV_C, and V_B are heated. Of these, the temperature indicating ink 13 is not printed at the two positions I_B and V_B, so that the temperature indicating ink 13 at the two positions II-A and IV_C is discolored. When the ink pattern (the defective portion of the temperature indicating ink 13) is different, the number and position of the temperature indicating ink 13 that changes color also changes. Based on such a color change pattern of the temperature indicating ink 13, the authenticity of the card is determined.

As shown in FIG. 4, an authenticity determination system 100 for determining authenticity of the card 1 includes a color change pattern detector 2, an operation terminal 3, and a server device 4. The operation terminal 3 is communicably connected to the color change pattern detector 2 and the server device 4.

As shown in FIG. 5, the color change pattern detector 2 includes a light irradiation unit 2A, a color change pattern detection unit 2B, and conveyance units 23 and 26. The light irradiation unit 2A has a plurality of light emitting elements 21. The light emitting element 21 emits infrared light, for example. A plurality of light emitting elements 21 are arranged in a matrix so as to correspond to the temperature-sensitive ink printing portions of the ink pattern IP. For example, as shown in FIGS. 3a and 3b, when there are 20 (=4×5) locations where the temperature-sensitive ink can be printed, 20 light emitting elements 21 (=4×5) are also provided.

A shielding plate 22 is provided between the light emitting elements 21 so that the temperature indicating ink of the ink pattern IP is irradiated with infrared light only from the corresponding light emitting element 21 and not from other light emitting elements 21. Preferably.

The color change pattern detection unit 2B includes a photographing unit 24 and a visible light source 25. The photographing unit 24 is, for example, a CCD camera.

The transport units 23 and 26 have rollers, a transport belt, and the like, and transport the card 1 in the color change pattern detector 2.

The card 1 inserted into the color change pattern detector 2 through the insertion port 20A is conveyed to the light irradiation section 2A by the conveying section 23. The light irradiation unit 2A irradiates the ink pattern IP of the card 1 with infrared light in the irradiation pattern instructed by the operation terminal 3 to heat the ink pattern IP. The temperature indicating ink 13 irradiated with infrared light changes color.

The card 1 irradiated with infrared light by the light irradiation unit 2A is conveyed to the color change pattern detection unit 2B by the conveyance units 23 and 26. The photographing unit 24 photographs the ink pattern of the card 1 (the first color change pattern that is changed in color by irradiation of infrared light). The visible light source 25 illuminates the card 1 at the time of photographing by the photographing unit 24.

After shooting, the card 1 is ejected through the ejection port 20B.

Next, the operation terminal 3 will be described. The operation terminal 3 is a computer including a display unit, a central processing unit (CPU), a storage unit, and the like, and a personal computer, a tablet terminal, or the like can be used. The storage unit is a hard disk, a semiconductor memory, or the like, and stores programs and data necessary for the CPU to execute various processes. As the CPU executes the program stored in the storage unit, as shown in FIG. 6, the card information input unit 31, the card information transmission unit 32, the irradiation pattern information receiving unit 33, the irradiation control unit 34, and the color change pattern information. The functions of the receiving unit 35, the color change pattern information transmitting unit 36, and the determination result receiving unit 37 are realized.

The card information input unit 31 receives an input of card information. The card information is, for example, an account number or a security code (memorial number). For example, card information is input using a touch panel or a keyboard. The account number may be read from the magnetic stripe of the card 1.

The card information transmission unit 32 transmits the input card information to the server device 4 via a network such as the Internet.

The irradiation pattern information receiving unit 33 receives the irradiation pattern information from the server device 4. The irradiation pattern information indicates from which of the light emitting elements 21 of the light irradiation section 2A the infrared light is emitted. The irradiation pattern information corresponds to the card information transmitted by the card information transmitting unit 32 to the server device 4.

The irradiation control unit 34 controls the light irradiation unit 2A and instructs the irradiation pattern of infrared light based on the irradiation pattern information.

The color change pattern information receiving unit 35 receives color change pattern information indicating from the color change pattern detector 2 which temperature indicating ink 13 has changed color. For example, the image capturing unit 24 receives a captured image of the card 1 as the color change pattern information.

The color change pattern information transmission unit 36 transmits the color change pattern information of the card 1 to the server device 4. The position of the temperature-change ink 13 that has changed color may be detected from the image captured by the image capturing unit 24, and the detection result may be transmitted to the server device 4 as color change pattern information, or the captured image itself may be transmitted to the server device 4. ..

The determination result receiving unit 37 receives the authentication determination result of the card 1 from the server device 4. The received determination result is displayed on a display unit such as a liquid crystal display.

Next, the configuration of the server device 4 will be described. As shown in FIG. 7, the server device 4 is a computer including a storage unit 40 in which programs and data necessary for the CPU to execute various processes are stored. A hard disk, a semiconductor memory, or the like is used as the storage unit 40.

The storage unit 40 stores account information of each account. The account information includes the account number, the name of the account holder, the set security code, the ink pattern printed on the issued card 1 (cash card), and the like.

The storage unit 40 also stores a plurality of irradiation pattern information. Each irradiation pattern information has a different defined irradiation pattern. That is, in the plurality of irradiation pattern information, the position and the number of the light emitting elements 21 that irradiate the infrared light are different from each other.

The storage unit 40 stores a table in which the security code and the irradiation pattern information are associated with each other. For example, the table describes that the security code “1234” corresponds to the irradiation pattern #1234. When the security code is 4 digits, 10,000 kinds of irradiation pattern information may be prepared so as to correspond to all the security codes one to one. Alternatively, a plurality of security codes may correspond to one irradiation pattern. Even with the same security code, different irradiation pattern information may be associated with each card.

When the CPU of the server device 4 executes the program stored in the storage unit 40, the card information receiving unit 41, the irradiation pattern searching unit 42, the irradiation pattern information transmitting unit 43, the color change pattern information receiving unit 44, and the determining unit 45. Also, the function of the determination result transmission unit 46 is realized.

The card information receiving unit 41 receives card information from the operation terminal 3.

The irradiation pattern search unit 42 refers to the table stored in the storage unit 40 to search and retrieve the irradiation pattern information corresponding to the security code included in the card information received from the operation terminal 3.

The irradiation pattern information transmission unit 43 transmits the irradiation pattern information extracted by the irradiation pattern search unit 42 to the operation terminal 3.

The color change pattern information receiving unit 44 receives the color change pattern information from the operation terminal 3. When the color change pattern information is the image captured by the image capturing unit 24, the color change pattern information receiving unit 44 detects the position of the color-changing temperature indicating ink 13 from the captured image.

The determination unit 45 refers to the account information stored in the storage unit 40, and determines whether the security code included in the card information received from the operation terminal 3 matches the security code registered in the account information. To do.

In addition, the determination unit 45, based on the ink pattern registered in the account information and the irradiation pattern information extracted by the irradiation pattern search unit 42, the discoloration pattern (second discoloration) when the card 1 is an authentic card. Pattern) is calculated. The determination unit 45 compares the discoloration pattern (first discoloration pattern) received from the operation terminal 3 with the calculated discoloration pattern, determines that the card 1 is an authentic card when the two match, and determines that the card 1 is an authentic card. Judge as a counterfeit card.

The determination result transmission unit 46 transmits the determination result of the determination unit 45 to the operation terminal 3. The determination result indicates the match/mismatch of the security codes and the authenticity of the card 1.

FIG. 9 is a flow chart for explaining the authenticity determination method for the card 1. For example, the card owner or the operator operates the operation terminal 3 to input the account number of the card 1 and insert the card 1 into the discoloration pattern detector 2. Further, the cardholder operates the operation terminal 3 to input the security code (steps S1 and S2).

The operation terminal 3 transmits the card information including the input account number and security code to the server device 4 (step S3). The server device 4 determines the irradiation pattern and transmits the irradiation pattern information to the operation terminal 3 (steps S4 and S5). The operation terminal 3 instructs the irradiation pattern to the light irradiation section 2A (step S6). The light irradiation unit 2A irradiates the ink pattern IP of the card 1 with infrared light according to the instructed irradiation pattern to heat it (step S7). After irradiating the infrared light, the photographing unit 24 photographs the ink pattern of the card 1 (step S8). The operation terminal 3 acquires a captured image (step S9)

The operation terminal 3 transmits the color change pattern information (the photographed image or the position of the color-changed temperature indicating ink 13 detected from the photographed image) of the temperature indicating ink 13 associated with the irradiation of infrared light to the server device 4 (step S10).

The server device 4 determines whether or not the security code received from the operation terminal 3 matches the registered security code (step S11). Further, the server device 4 calculates a color change pattern when the ink pattern registered in the account number received from the operation terminal 3 is irradiated with infrared light by the irradiation pattern transmitted to the operation terminal 3, and the calculation result and The authenticity of the card 1 is judged by comparing with the discoloration pattern received from the operation terminal 3 (steps S12 and S13). When the server device 4 transmits the determination result to the operation terminal 3, the determination result is displayed on the display unit of the operation terminal 3 (steps S14 and S15).

FIG. 8a shows a case where the card 1 is an authentic card and the entered security codes match. If the correct security code is entered, infrared light will be applied to the four locations I_B, II-A, IV_C, and V_B to heat them. Since the temperature indicating ink 13 is not printed at the two positions I_B and V_B, the temperature indicating ink 13 at the two positions II-A and IV_C is discolored.

FIG. 8b shows the case where the card 1 is an authentic card and the entered security code is incorrect. The irradiation positions corresponding to the erroneously input security code are I_C, II-A, IV_D, and V_B. Since the temperature indicating ink 13 is not printed at two points IV_D and V_B, the temperature indicating ink 13 at two points I-C and II_A is discolored. Since the security code is incorrect, the color change pattern detected by the color change pattern detector 2 is different from the color change pattern shown in FIG. 8a. However, since it matches the color change pattern calculated by the server device 4, the card 1 is determined to be an authentic card. Therefore, in this example, the owner of the authentic card is presumed to have erroneously input the security code.

FIG. 8c shows the case where the card 1 is a counterfeit card and the entered security code is correct. This counterfeit card is assumed to have temperature-sensitive ink printed on all 20 locations. When the correct security code is entered, infrared light is applied to the four areas I_B, II-A, IV_C, and V_B to heat them. The color change pattern detected by the color change pattern detector 2 is such that the temperature indicating ink 13 at four locations I_B, II-A, IV_C, and V_B changes color.

On the other hand, the color change pattern calculated by the server device 4 is as shown in FIG. 8a. Therefore, the color change pattern detected by the color change pattern detector 2 and the color change pattern calculated by the server device 4 do not match, and the server device 1 determines that the card 1 is a counterfeit card. For example, it is suspected that a third party acquired the account number and security code information by some means and created a counterfeit card for use.

As described above, according to the present embodiment, the ink pattern printed on the card 1 is heated by irradiating infrared light with an irradiation pattern corresponding to the input security code, thereby changing the color change pattern of the temperature indicating ink. To detect. Since the information of the ink pattern printed on the card 1 is registered in the server device 4, the discoloration pattern to be detected can be calculated from the infrared light irradiation pattern.

When the detected discoloration pattern and the discoloration pattern obtained by calculation match, it is considered that a regular ink pattern is printed on the card 1, and therefore it is determined to be an authentic card. On the other hand, when the detected discoloration pattern does not match the calculated discoloration pattern, it is considered that the ink pattern printed on the card 1 is not a legitimate one, and thus it is determined as a counterfeit card.

As described above, the authenticity of the card can be accurately determined by using the color change pattern of the temperature indicating ink printed on the card. Further, the cost can be suppressed more than that of the IC chip, and the resistance to impact, static electricity, high temperature, etc. can be improved.

Irradiation of infrared light in the discoloration pattern detector 2 and detection (imaging) of the discoloration pattern may be performed by fixing the card 1 after conveying the card 1 to a predetermined position. It may be carried out. Alternatively, the card 1 may be fixed and the light irradiation unit 2A and the color change pattern detection unit 2B may be moved.

In the above embodiment, the configuration in which the light irradiation unit 2A and the color change pattern detection unit 2B are separately provided in the color change pattern detector 2 has been described, but the infrared light irradiation and the color change pattern detection are performed at the same location. You can go. The color change pattern may be detected by a change in transmitted light.

The temperature indicating ink may include an infrared absorbing material. By including the infrared absorbing material, it is possible to discolor the temperature indicating ink in a short time when the light irradiating section 2A irradiates infrared light.

In order to increase the heat generation efficiency, the light emitted from the light emitting element 21 may be condensed by an optical system such as a lens.

A plurality of temperature indicating inks having different discoloration temperatures may be used. In this case, the irradiation time and the irradiation voltage of each light emitting element 21 may be adjusted according to the temperature indicating ink used.

The light emitting element 21 may be an LED (light emitting diode) or an infrared laser light emitting element.

The matrix-printed ink may be any photochromic ink that changes color when irradiated with light, and fluorescent ink or the like can be used in addition to the temperature indicating ink. For example, when ultraviolet fluorescent ink is used, the light emitting element 21 radiates ultraviolet rays as ink color changing light.

In the above embodiment, an example was described in which a normal ink that does not change color by light irradiation (non-photo-color-change ink) is printed so as to surround the photo-color-change ink, but the normal ink may be omitted.

In the above embodiment, the configuration in which the detected color change pattern and the calculated color change pattern are compared by the server device 4 has been described, but the operation terminal 3 may perform the comparison. For example, the server device 4 transmits the calculated discoloration pattern to the operation terminal 3. The operation terminal 3 notifies the determination result to the server device 4.

In the above-described embodiment, an example in which the cardholder inputs the security code has been described. However, instead of inputting the security code, the identification may be performed by means such as fingerprint authentication or iris authentication.

In the above embodiment, an example in which the temperature-sensitive ink 13 is printed so as to have a circular shape in a plan view is shown, but the shape is not limited to a circle, and may be a rectangle, a triangle, or the like.

In the above embodiment, an example in which the infrared light is emitted to the ink pattern with the irradiation pattern corresponding to the input security code has been described, but the irradiation pattern may be randomly determined from a plurality of irradiation patterns stored in the storage unit 40. Good. Further, the color change pattern detected after irradiation in the irradiation pattern and the color change pattern obtained by calculation may be collated a plurality of times with different irradiation patterns.

The card 1 is not limited to a cash card, but may be a credit card, an ID card, or the like. In the above embodiment, the card in which the ink pattern is printed with the temperature indicating ink and the normal ink has been described, but the present invention is not limited to the card and can be applied to various prints on which the ink pattern can be printed. The operation terminal 3 transmits, to the server device 4, identification information such as an account number, a card number, and an issue number that can uniquely identify the printed matter. The server device 4 stores the print object information in which the identification information and the ink pattern are associated with each other.

The printed matter inspection apparatus including the color change pattern detector 2 and the operation terminal 3 may be built in one device such as an ATM.

The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements within a range not departing from the gist of the invention in an implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements of different embodiments may be combined appropriately.

1 Card 2 Color Change Pattern Detector 2A Light Irradiation Section 2B Color Change Pattern Detection Section 3 Operation Terminal 4 Server Device 10 Base Material 12 Heat Insulation Layer 13 Light Color Change Ink
14 Normal Ink 15 Protective Layer IP Ink Pattern 21 Light-Emitting Element 22 Shielding Plate 24 Photographing Section 100 Authentication System

Claims (12)

A system for determining the authenticity of a printed matter in which a photochromic ink is printed in a dot matrix on one surface of a substrate,
For each of the plurality of prints, the prints information in which the identification information of the prints and the ink pattern of the photochromic ink being printed are associated with each other, and a plurality of irradiation pattern information of the ink colorchanging light are stored, A server device that determines an irradiation pattern of ink discoloration light that irradiates a print object to be authenticated.
An operation terminal that transmits the identification information of the printed matter to be authenticity determination target to the server device, and acquires the determined irradiation pattern from the server device,
A detector for irradiating the photochromic ink of the printed matter with ink colorchanging light in an irradiation pattern acquired by the operating terminal from the server device to detect a first colorchanging pattern of the photochromic ink,
Equipped with
The operation terminal transmits information on the first color change pattern to the server device,
The server device refers to the printed matter information, and the ink pattern corresponding to the identification information received from the operation terminal is irradiated with ink color-changing light in a determined irradiation pattern. Is calculated, the first color change pattern received from the operation terminal is compared with the second color change pattern, and the authenticity of the printed matter is determined based on the comparison result. The authenticity determination system according to claim 1, wherein the ink patterns of the plurality of print objects registered in the print object information are different from each other. A security code of each printed matter is registered in the printed matter information,
The operation terminal receives an input of a security code, transmits the input security code to the server device,
The authenticity determination system according to claim 1, wherein the server device compares the security code received from the operation terminal with a security code registered in the print object information. The authenticity determination system according to claim 3, wherein the server device determines an irradiation pattern of the ink discoloration light to be applied to the print object to be authenticated, based on the security code received from the operation terminal. 4. The server device randomly determines an irradiation pattern of ink discoloration light to be applied to a printed matter to be authenticity determination, based on the plurality of irradiation pattern information, according to any one of claims 1 to 3. Authenticity determination system. The authenticity determination system according to any one of claims 1 to 5, wherein a portion where the detector irradiates the ink discoloration light includes a region where the photodiscoloration ink is not printed. The printed matter is printed with a non-photochromic ink whose hue does not change by irradiation of the ink colorchanging light so as to surround the photochromic ink, and the photochromic ink before irradiation of the ink color changing light is The authenticity determination system according to claim 1, wherein the authenticity determination system has the same color as the non-photochromic ink. The authenticity determination system according to any one of claims 1 to 7, wherein the detector has a plurality of light emitting elements that are arranged in a matrix and emit the ink color changing light. 9. The authenticity determination system according to claim 1, wherein the photochromic ink is a temperature indicating ink whose hue changes at a predetermined temperature, and the ink colorchanging light is infrared light. The authenticity determination system according to claim 9, wherein the temperature indicating ink includes an infrared absorbing material. A method for determining the authenticity of a printed matter in which a photochromic ink is printed in a dot matrix on one surface of a base material,
The operation terminal transmits the identification information of the print object of the authenticity determination target to the server device;
A step in which the server device determines an irradiation pattern of ink discoloration light;
A detector irradiating the photochromic ink of the printed matter with ink colorchanging light in the irradiation pattern to detect a first colorchanging pattern of the photochromic ink;
The server device refers to the print object information in which the print pattern identification information and the ink pattern of the photochromic ink being printed are associated with each other for each of the plurality of print objects, and the identification received from the operation terminal. The second color change pattern detected by the detector is calculated by calculating a second color change pattern of the photo color change ink when the ink color corresponding to the information is irradiated with the ink color change light by the irradiation pattern, and the second color change pattern detected by the detector. Comparing with, and the step of determining the authenticity of the printed matter based on the comparison result,
An authenticity determination method including. A printed matter inspection device used for authenticity determination of a printed matter in which a photochromic ink is printed in a dot matrix shape on one surface of a base material,
An operation terminal that transmits identification information of a printed matter to be authenticity determination to a server device, and acquires an irradiation pattern of ink discoloration light from the server device,
A detector for irradiating the photochromic ink of the printed matter with ink colorchanging light in the irradiation pattern acquired by the operating terminal from the server device, and detecting the colorchanging pattern of the photochromic ink.
Equipped with
The said operation terminal transmits the information of the said discoloration pattern to the said server apparatus, The printed matter inspection apparatus characterized by the above-mentioned.

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