JP2005193584A - Forgery preventing information carrier and its authenticating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forgery preventing information carrier capable of surely avoiding a forgery and a duplication by piracy, improving reliability and safety, and practiced at a lower cost, and its writing method. <P>SOLUTION: The forgery preventing information carrier is characterized in that an image is formed on a partial region or the whole region of the surface of a base material and a partial region or the whole region of the back surface, and a part or the whole of the image on the back surface can be confirmed from the surface. An authenticating method for the forgery preventing information carrier is characterized in that two or more image sensors with different imaging angles read a partial region or the whole region of the surface of the forgery preventing carrier, and a partial region and the whole region of the surface of the forgery preventing carrier are read from the surface, and authenticating is performed by using an image of each image sensor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention can be added to products that require authentication such as credit cards, cash cards, membership cards, etc. and branded products, etc., and can effectively prevent forgery by copying machines and scanners. The present invention relates to an anti-counterfeit information carrier such as an anti-counterfeit card and an authentication tag that can be manufactured at low cost and an authentication method thereof.

  In general, a magnetic card for magnetically writing authentication information and an IC card having a data memory function have a possibility of forgery or authentication information being stolen. Is socially required.

  Conventionally, a data carrier is known as an authentication tag for the purpose of avoiding forgery or theft. This data carrier is a data carrier provided with a recognition information part as user-specific recognition information, and the recognition information part is made of a monochromatic thermoplastic resin pellet and a metal powder arranged at random. It is what was simultaneously molded by the extruder (for example, refer patent document 1).

  However, since such a conventional data carrier uses at-random metal powder, forgery and duplication are difficult, but the metal powder constituting the random pattern is directly read, so for example, a copy of identification information by a copying machine, etc. On the other hand, there is a risk that it cannot be avoided reliably.

The patent literature is as follows.
Japanese Patent Laid-Open No. 10-44650

  The present invention, which has been made in view of the above-mentioned problems, has responded to such a conventional request, and in particular, avoids duplication by forgery and plagiarism, thereby improving reliability and safety, and at a lower cost. It is an object of the present invention to provide a forgery prevention information carrier and a method for reading the same.

  In order to achieve the above object, the invention according to claim 1, wherein an image is formed in a partial region or the entire region of the surface of the substrate and a partial region or the entire region of the back surface, It is an object of the present invention to provide a forgery prevention information carrier characterized in that a part or all of an image on the back side can be confirmed.

  The invention according to claim 2 is characterized in that one or both of the image on the front surface and the image on the back surface is formed by a line drawing or a stipple or a combination of a line drawing and a stipple. An information carrier is provided.

  The invention according to claim 3 is characterized in that one or both of the image on the front surface and the image on the back surface is formed of a combination of an infrared absorbing material and an infrared transmitting material. An anti-counterfeit information carrier as described above is provided.

  The invention according to claim 4 is a partial area or the entire area of the surface of the anti-counterfeit carrier according to any one of claims 1 to 3, in two or more image sensors having different shooting angles. Further, the present invention provides an authentication method for an anti-counterfeit information carrier characterized in that a partial area or the entire area of the back surface is read from the front surface and authentication is performed using an image of each image sensor.

  According to a fifth aspect of the present invention, forgery prevention according to the fourth aspect, wherein one image sensor reads only the infrared region among two or more image sensors having different shooting angles. An information carrier authentication method is provided.

  The anti-counterfeit information carrier of the present invention is formed on the front and back of the base material so that a part of each image can be visually recognized, such as a line drawing or a point drawing. The images provided on the front and back of the transparent part are read, and the authenticity is determined from the image of the image sensor.

  The anti-counterfeit carrier such as the anti-counterfeit card and the authentication tag of this configuration steals the magnetic data or the memory data of the IC like the magnetic card or the IC card as in the conventional method of manufacturing the counterfeit card, and stores this data. The method of writing data on a magnetic card or IC card manufactured in large quantities in advance and manufacturing a counterfeit card cannot produce a counterfeit card or the like, which is very effective for preventing counterfeiting, particularly for theft of data.

  Furthermore, by forming a part of the image with a material that transmits infrared rays and allowing one of the two image sensors to read the infrared image at the time of reading, the effect of preventing forgery is further enhanced.

  According to the present invention, counterfeiting is difficult not only if the reading angle and reading direction of the image sensor are not grasped, but also counterfeiting is not possible unless sufficient consideration is given to the alignment and spacing of the front and back, and the forgery effect is high. It is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking a case where the information carrier is a card as a representative example. Of course, when the information carrier is other than a card, it can be applied in various modifications.

  FIG. 1 is a plan view showing an embodiment of an anti-counterfeit information carrier according to the present invention, and FIG. 2 is a cross-sectional view taken along line XX of the anti-counterfeit information carrier of FIG. FIG. 3 is a schematic diagram showing a method for reading the anti-counterfeit card of FIG. FIG. 4 is a plan view showing one embodiment of the forgery prevention information carrier of the present invention, and FIG. 5 is a sectional view of the forgery prevention information carrier of FIG. FIG. 6 is a schematic view showing a method for reading the anti-counterfeit card shown in FIG.

  The anti-counterfeit card 1 shown in FIGS. 1 and 2 includes a transparent base material 12 and overcoats 13 and 14, and a surface random pattern 15 is provided on the surface of the transparent base material 12, and a back surface random pattern 16 is provided on the back surface. . The front surface random pattern 15 and the back surface random pattern 16 are provided on the transparent window portion 11 of the forgery prevention card 1 so that a part of the back surface random pattern 16 can be seen from the front surface of the forgery prevention card 1. When tilted, a part of the back surface random pattern 16 hidden by the front surface random pattern 15 can be seen.

  The anti-counterfeit card 3 shown in FIGS. 4 and 5 includes a transparent base material 32 and overcoats 33 and 34. The surface random pattern 35 on the surface of the transparent base material 32, the back surface random pattern 36 on the back surface, and an infrared transmission type A back surface random pattern 37 is provided. The front surface random pattern 35, the back surface random pattern 36, and the infrared transmission type back surface random pattern 37 are provided on the transparent window 31 of the forgery prevention card 3, and the back surface random pattern from the front surface of the forgery prevention card 3 in a normal state. 16 and a part of the infrared transmission type back side random pattern 37 can be seen, and when the forgery prevention card 3 is tilted, the back side random pattern 36 and the part of the infrared transmission type back side random pattern 37 hidden by the front side random pattern 35 are displayed. It has a visible configuration. Further, when the forgery prevention card 3 is viewed in the infrared region, only the front surface random pattern 35 and the back surface random pattern 37 can be confirmed.

  FIG. 3 is a schematic diagram showing a reading method of the forgery prevention card 1 of FIG. 1, and the image sensor A 18 and images having different photographing angles are irradiated from the back surface of the forgery prevention card 1 toward the transparent window 11. Images projected from the transparent window portion 11 are captured by the sensor B19. The authenticity determination is performed by the data processing unit 30, the image 22 captured by the image sensor A and the image 23 captured by the image sensor B are combined 24, encrypted and encoded 25, and recorded in advance in the database 26. Whether or not the code matches the authenticity determination 27 is performed. If the code matches, the next processing 28 is performed. If the code does not match, exclusion 29 is performed.

  FIG. 6 is a schematic diagram showing a reading method of the forgery prevention card 3 of FIG. 4. The image sensor A 38 and the image having different photographing angles are irradiated by irradiating the light source 40 from the back surface of the forgery prevention card 3 toward the transparent window 31. Images projected from the transparent window portion 31 are captured by the sensor B39. However, since the image of the image sensor B39 is the image 43 projected through the smart cut filter 41, the infrared transmission type back surface random pattern 37 is not projected on the projected image of the image sensor B39. The authenticity determination is performed by the data processing unit 50, and the image 42 photographed by the image sensor A and the image 43 photographed by the image sensor B are synthesized 44 and encrypted and coded 45, and recorded in the database 46 in advance. A true / false judgment 47 is performed to determine whether or not the code matches, and the next processing 48 is performed if they match, and exclusion 49 is performed if they do not match.

  1 and 4 can be used as an authentication tag by changing the shape of the card (not shown).

  The transparent base materials 12 and 32 are not particularly limited as long as they are transparent sheets in the range of 0.05 to 1.0 mm. However, in consideration of cutting and embossing properties such as cards, plastic sheets are suitable. In the case of the above card, it is a transparent plastic of about 0.5 mm, such as vinyl chloride (PVC), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polystyrene (PS) or ABS sheet. In particular, vinyl chloride is often used due to suitability for embossing, and recently, the above-mentioned resins including amorphous PET and the like have been devised and used due to environmental problems during incineration.

  The front surface random patterns 15 and 35, the back surface random patterns 16 and 36, and the infrared transmission type back surface random pattern 37 are provided by, for example, an offset ink, a gravure ink, a screen ink, and the like by respective printing methods. In particular, the pigment of the ink used for the front surface random pattern 35 and the back surface random pattern 36 is composed of a pigment or dye that absorbs infrared light, and the back surface random pattern 37 of the infrared transmission type is composed of a pigment or dye that transmits infrared light. Has been.

  In addition, as a pigment of the ink used for the front surface random pattern 35 and the back surface random pattern 36, it is possible to use a pigment or dye that transmits light in the visible light region and absorbs light by infrared rays.

  Thus, the base material of the present invention may be transparent in the confirmation region or at least transparent to the extent that an image can be confirmed, and need not be transparent outside the confirmation region. Further, it is not necessary for the confirmation region to be completely transparent, and even if it is colored transparent or translucent, it is sufficient if it is transparent enough to confirm the image from the front surface to the back surface.

  A random image is preferable because it is highly effective in preventing counterfeiting, but a meaningful image or the like may be used. In addition, the image may be sufficiently effective with binary data such as black and white line drawing or stipple. A gradation image or a color image may be used if necessary, but in this case, the authentication method becomes complicated.

  Note that the information to be authenticated in the present invention may be the authenticity of the carrier itself, the information displayed on the carrier, or the authenticity of information contained in the IC or magnetism. Absent.

  Further, the authentication is obtained not only by combining the images of a plurality of image sensors, but also by comparing the image of the image sensor with an image stored in advance, or by image processing such as taking a difference between the images of the plurality of image sensors. It is possible to use an authentication method using images of various image sensors.

  Therefore, it is possible to use various databases such as those stored as images, those stored as images, those using various encryption means, etc. in addition to those stored by encoding, and the database itself is not used. An authentication method can also be used.

  In addition to using multiple image sensors, there are various methods for capturing images from multiple image sensors, such as changing the angle of one image sensor, performing mirror processing, and changing the capture direction instead of the angle. It is possible to use a method. In addition to a CCD camera or the like, it is possible to use various image sensors such as an optical camera that can take an image as an image sensor.

  The present invention will be described in detail as a representative by giving specific examples corresponding to the embodiments of the present invention, in which the case where the information carrier is a card has been described as a representative example. Accordingly, it is natural that modifications can be made according to the standard, the information carrier, or the type of information possessed.

  Random pattern line drawings were printed on the front and back surfaces of a transparent PVC base material having a thickness of 0.54 mm using a process ink ink by an offset printing method. At the same time, the pattern is printed by the offset printing method, then a 0.1 mm thick transparent PVC oversheet is placed on the front and back of the transparent PVC base material, a magnetic stripe tape is applied to the card surface, and lamination is performed by the hot press method. A card forgery prevention was obtained.

  The forgery prevention card was read with a scanner to produce a forgery card. When the determination was made with the reader shown in FIG. 3, it was determined to be a forgery card because it did not match the genuine code.

Random pattern line drawings are printed on the front and back of a transparent PVC substrate with a thickness of 0.54 mm by offset printing using process black ink, and further, random pattern line drawings are printed on the back using infrared transmission type black ink. Printed. At the same time, the pattern is printed by the offset printing method, then a 0.1 mm thick transparent PVC oversheet is stacked on the front and back of the transparent PVC base material, a magnetic stripe tape is applied to the card surface, and lamination is performed by the hot press method. A card forgery prevention was obtained.

  The forgery prevention card was read with a scanner to produce a forgery card. When the determination was made with the reader shown in FIG. 6, it was determined to be a forgery card because it did not match the genuine code.

  The present invention provides forgery prevention means such as a bank card, telephone card, credit card, prepaid card, security lock card (card key), microcomputer program card, IC card, commuter pass, identification card, certificate, passport, etc. Can be applied to information carriers, which are various data carriers that require data.

The top view which shows one Example of the forgery prevention card | curd of this invention. Sectional drawing in the XX line of the forgery prevention card | curd of FIG. Schematic which shows the reading method of the forgery prevention card | curd of FIG. The top view which shows one Example of the forgery prevention card | curd of this invention. Sectional drawing in the YY line of the forgery prevention seal | sticker of FIG. Schematic which shows the reading method of the forgery prevention card | curd of FIG.

Explanation of symbols

1, 3 Anti-counterfeit card 11, 31 Transparent window portion 12, 32 Transparent base material 13, 33 Overcoat 14, 34 Overcoat 15, 35 Front surface random pattern 16, 36 Back surface random pattern 37 Infrared transmission type back surface random pattern 18, 38 Image Sensor A
19, 39 Image sensor B
20, 40 Light source 41 Visible light cut filter 22, 42 Image taken by image sensor A 23, 43 Image taken by image sensor B 30, 50 Data processing unit

Claims (5)

  An image is formed in a partial region or whole area of the surface of the substrate and a partial region or whole area of the back surface, and a part or all of the image on the back surface can be confirmed from the front surface. Anti-counterfeiting information carrier.   2. The forgery prevention information carrier according to claim 1, wherein one or both of the image on the front surface and the image on the back surface is formed by a line drawing or a dot drawing or a combination of a line drawing and a dot drawing.   The forgery prevention information carrier according to claim 1, wherein one or both of the image on the front surface and the image on the back surface are formed of a combination of an infrared absorbing material and an infrared transmitting material.   In two or more image sensors having different shooting angles, a partial area or whole area of the surface of the forgery prevention carrier and a partial area or whole area of the back surface of the anti-counterfeit carrier according to any one of claims 1 to 3. An authentication method for an anti-counterfeit information carrier, comprising: reading from a surface and performing authentication using an image of each image sensor.   5. The forgery prevention information carrier authentication method according to claim 4, wherein, of two or more image sensors having different shooting angles, one image sensor reads only an infrared region.

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