JP2005208775A - Electronic authentication sheet and electronic authentication system for authenticating the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic authentication sheet which can be produced easily and inexpensively, and is capable of preventing forgery unfailingly, and an electronic authentication system for authenticating the electronic authentication sheet. <P>SOLUTION: The sheet (a form 12) that needs to be authenticated is an electronic authentication sheet 9 in which a resonant circuit 1 composed of a coil and a capacitor is embedded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electronic authentication sheet and an electronic authentication system for authenticating the electronic authentication sheet, and in particular, it is possible to check authenticity or prevent forgery of important documents, certificates, securities, tickets, etc. that require authentication. The present invention relates to an electronic authentication sheet and an electronic authentication system for authenticating the electronic authentication sheet.

  Conventionally, imprints are mainly used as authentication means for important documents, securities, cash vouchers, certificates, etc. that require authentication, but since counterfeit products can be made relatively easily, to avoid this, for example, A method of printing an identification code using special ink such as ultraviolet ink that cannot be visually recognized by the naked eye is known. However, due to recent advances in computer technology, copy technology, and printing technology, it has become relatively easy to produce counterfeit products such as imprints and printing, etc. Is getting harder.

Therefore, in order to solve the above-mentioned problem, a method of attaching a tag member or the like to a document is known. The paper to be embedded is described.
JP 2002-298118 A

  As described above, the method of printing an identification code using special ink such as imprint or ultraviolet ink has become possible to produce counterfeit products relatively easily due to recent technological advances. It is becoming difficult to prevent counterfeiting only with authentication means such as for example.

  On the other hand, the method of attaching a tag member or the like to a document and the paper described in Patent Document 1 solve the above-mentioned problem, and it can be expected to prevent forgery of paper that requires authentication.

  However, the method of sticking the tag member or the like on the document is likely to be tampered with the tag member being peeled off, and the paper described in Patent Document 1 is created by inserting the tag member into the paper. The process is complicated, the paper is limited to Japanese paper and the like is expensive, and the tag member is also immersed in water in the step of pouring, so there is a problem that waterproof performance is required. is there. Furthermore, there is a limitation that printing, writing, or the like must be performed on paper after the tag member is incorporated.

  Therefore, there is a technical problem to be solved in order to obtain an electronic authentication sheet that can be easily and inexpensively manufactured and that can reliably prevent forgery and an electronic authentication system for authenticating the electronic authentication sheet. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a sheet requiring authentication, and a resonance circuit composed of a coil and a capacitor is embedded in the sheet. The electronic authentication sheet is provided.

  According to the first aspect of the present invention, it is possible to identify whether or not the electronic authentication sheet is authentic by detecting the frequency of the embedded resonance circuit.

  The invention according to claim 2 provides the electronic authentication sheet according to claim 1, wherein the resonance circuit has a resonance frequency set to a specific value.

  According to the second aspect of the invention, the electronic authentication sheet is specified by the resonance frequency set to a unique value.

  Further, in the invention described in claim 3, the resonance circuit is composed of a plurality of resonance circuits, the plurality of resonance circuits have different resonance frequencies, and identification information is formed by a combination of the different resonance frequencies. The electronic authentication sheet according to claim 1 or 2 configured as described above is provided.

  According to the third aspect of the present invention, the identification accuracy is improved by the identification information based on the combination of different resonance frequencies.

  Furthermore, the invention according to claim 4 is the sheet according to claim 1, wherein the sheet is formed by adhering a plurality of sheets, and the resonance circuit is sandwiched between the plurality of sheets. An electronic authentication sheet is provided.

  According to the fourth aspect of the present invention, since the resonance circuit is sandwiched between a plurality of sheets, the process of embedding the resonance circuit is easy.

  According to a fifth aspect of the present invention, there is provided the electronic authentication sheet according to the first, second, third or fourth aspect, wherein the sheet is a sheet.

  According to the invention described in claim 5, since the paper is used, it is inexpensive.

  The invention according to claim 6 provides the electronic authentication sheet according to claim 1, 2, 3 or 4, wherein the sheet is a resin sheet made of a polymer material.

  According to the sixth aspect of the invention, since the resin sheet is used, the durability of the electronic authentication sheet is improved.

  Further, in the invention according to claim 7, the resonance circuit is formed by fixing a coil pattern constituting the coil and a capacitor pattern constituting the capacitor to an insulating base material, and the insulating base material is substantially the same as the sheet. The electronic authentication sheet according to claim 1, 2, 3, 4, 5, or 6 formed in the same area.

  According to the seventh aspect of the present invention, the electronic authentication sheet is formed substantially flat without swelling the front and back surfaces.

  Furthermore, the invention described in claim 8 is a reader that reads the resonance frequency of the electronic authentication sheet according to claim 1, 2, 3, 4, 5, 6 or 7, and a resonance circuit embedded in the electronic authentication sheet. The electronic authentication system is configured such that the electronic authentication sheet is identified by the reader, and the electronic authentication sheet can be checked for authenticity or separated.

  According to the eighth aspect of the invention, it is possible to obtain an electronic authentication system capable of checking the authenticity of the electronic authentication sheet or performing the separation process by reading the resonance frequency of the resonance circuit embedded in the electronic authentication sheet.

  The invention according to claim 1 of the present invention is a sheet that requires authentication, and is an electronic authentication sheet in which a resonance circuit composed of a coil and a capacitor is embedded in the sheet. By detecting the frequency, it is possible to identify whether or not the electronic authentication sheet is authentic. Further, by using such an electronic authentication sheet, an electronic authentication sheet that cannot be easily counterfeited can be obtained.

  Further, in the invention described in claim 2, since the resonance circuit has a resonance frequency set to a specific value, in addition to the effect of the invention described in claim 1, the resonance circuit is provided with a resonance frequency set to a specific value. The electronic authentication sheet is specified, and whether or not the electronic authentication sheet is authentic can be reliably identified.

  Further, in the invention described in claim 3, the resonance circuit is composed of a plurality of resonance circuits, the plurality of resonance circuits have different resonance frequencies, and identification information is formed by a combination of the different resonance frequencies. Thus, in addition to the effect of the invention according to claim 1 or 2, the identification information based on the combination of different resonance frequencies enhances the identification accuracy and enhances the forgery prevention effect.

  Furthermore, in the invention described in claim 4, the sheet is formed by adhering a plurality of sheets, and the resonance circuit is sandwiched between the sheets. In addition to the effects of the present invention, the process of embedding the resonance circuit is easy, and once the resonance circuit is embedded by being sandwiched between the sheets, it is difficult to take out the resonance circuit and perform an illegal act.

  In the invention described in claim 5, since the sheet is a sheet, in addition to the effect of the invention described in claim 1, 2, 3 or 4, it is inexpensive and can be printed or written on the surface of the sheet. It is.

  In the invention described in claim 6, since the sheet is a resin sheet made of a polymer material, the durability is improved in addition to the effect of the invention described in claim 1, 2, 3 or 4.

  Further, in the invention according to claim 7, the resonance circuit is formed by fixing a coil pattern constituting the coil and a capacitor pattern constituting the capacitor to an insulating base material, and the insulating base material is substantially the same as the sheet. In addition to the effects of the invention according to claim 1, 2, 3, 4, 5 or 6, since the same area is formed, the electronic authentication sheet is formed substantially flat without swelling the front and back surfaces, As a result, there is an advantage that a resonant circuit is not noticed inside.

  Furthermore, the invention described in claim 8 is a reader that reads the resonance frequency of the electronic authentication sheet according to claim 1, 2, 3, 4, 5, 6 or 7, and a resonance circuit embedded in the electronic authentication sheet. The electronic authentication system is configured such that the electronic authentication sheet can be checked for authenticity or separated by identifying the electronic authentication sheet by the reader. Therefore, the resonance circuit embedded in the electronic authentication sheet By reading the resonance frequency, the electronic authentication sheet can be checked for authenticity or separated, and an electronic authentication system that can detect forgery, fraud, etc. can be obtained.

An object of the present invention is to provide an electronic authentication sheet that can be easily and inexpensively manufactured and reliably prevent counterfeiting, and an electronic authentication system for authenticating the electronic authentication sheet. Achieved by electronic authentication sheet with embedded resonant circuit.

  Hereinafter, Example 1 will be described in detail with reference to FIGS. 1 to 3. FIG. 1A shows a plan view of an authentication resonance circuit used in the present invention, and FIG. 1B shows a longitudinal sectional view of the resonance circuit. In FIG. 1, reference numeral 1 denotes an authentication resonance circuit. The resonance circuit 1 is placed on an insulating substrate 2 and is formed into a coil pattern 3 made of a metal thin film, and the insulating substrate. 2 and a capacitor pattern 6 having an electrode 4 and an electrode 5 disposed on the front and back surfaces, respectively.

  The electrode 5 is connected to an extending portion 7 extending from the electrode 5 to the center of the back surface of the insulating base 2, and the distal end portion of the extending portion 7 stands up from the distal end portion of the extending portion 7. And connected to a connector 8 that penetrates the insulating base 2 and is connected to the center of the coil 3. Thereby, the coil pattern 3 and the capacitor pattern 6 are connected to each other to form the resonance circuit 1 having a specific resonance frequency.

  2A is a plan view of the electronic authentication sheet of the present invention, and FIG. 2B is a longitudinal sectional view of the electronic authentication sheet. In FIG. 2, reference numeral 9 denotes an electronic authentication sheet. The electronic authentication sheet 9 is composed of a sheet 12, which is a sheet composed of an upper sheet 10 and a lower sheet 11, and the resonance circuit 1. 1 is sandwiched between an upper paper 10 and a lower paper 11 constituting the paper 12 via an adhesive 13 and is embedded in the paper 12. Note that the sheet 12 may be formed by stacking three or more sheets.

  As shown in FIG. 3, the electronic authentication sheet 9 configured as described above transmits a radio wave having the same frequency as that of the resonance circuit 1 of the electronic authentication sheet 9 from the transmission unit 15 of the reader 14. 1 resonates to induce radio waves, and radio waves of the same frequency are transmitted from the resonance circuit 1. The radio wave transmitted from the resonance circuit 1 is received by the receiving unit 16 of the reader 14, and the received radio wave is recognized by the control unit 17. As described above, when the resonance circuit 1 transmits a radio wave having the same frequency as that transmitted from the reader 14, the electronic authentication sheet 9 can be determined to be a correct regular authentication sheet.

  On the other hand, when the resonance circuit 1 transmits a radio wave having a frequency different from the frequency of the radio wave transmitted from the reader 14, or does not transmit at all, the electronic authentication sheet 9 being inspected is not a regular authentication sheet. Is shown. Thus, the authenticity of the electronic authentication sheet 9 can be reliably checked.

  Hereinafter, Example 2 will be described in detail with reference to FIG. 4A is a plan view of the electronic authentication sheet, and FIG. 4B is a longitudinal sectional view of the electronic authentication sheet. In FIG. 4, 18 is an electronic authentication sheet replacing the electronic authentication sheet (9 in FIG. 2), and the electronic authentication sheet 18 is embedded in the electronic authentication sheet (9 in FIG. 2). Instead of the resonance circuit (1 in FIG. 2), a combination resonance circuit 19 in which the authentication forgery prevention effect is further enhanced is embedded, and the combination resonance circuit 19 includes two resonance circuits 20 having different natural frequencies. , 21 in combination, and is configured to have more complex identification information by combining different natural frequencies. The two resonance circuits 20 and 21 have substantially the same configuration as the above-described resonance circuit (1 in FIG. 2), and are configured so that their natural frequencies are different from each other.

The combination resonance circuit 19 sequentially transmits the same resonance frequency as that of the two resonance circuits 20 and 21 by the above-described reader (14 in FIG. 3), and both of the two resonance circuits 20 and 21 are in resonance. The electronic authentication sheet 18 having the combination resonance circuit 19 is determined to be genuine only when responding to each frequency, that is, when each transmitting the same resonance frequency as the frequency transmitted by the reader. If only one or both do not react (send), the electronic authentication sheet 18 is considered forged. By using the combination resonance circuit 19 in this manner, the forgery prevention effect is further enhanced.

  The combination resonance circuit 19 is configured by a combination of two resonance circuits 20 and 21. Alternatively, three or more resonance circuits may be combined, and in that case, The anti-counterfeit effect is further strengthened.

  Hereinafter, Example 3 will be described in detail with reference to FIG. FIG. 5A is a plan view of the electronic authentication sheet, and FIG. 5B is a longitudinal sectional view of the electronic authentication sheet. In FIG. 5, reference numeral 23 denotes an electronic authentication sheet. The electronic authentication sheet 23 is obtained by embedding the resonance circuit 1 in a single sheet 24. The sheet 24 is, for example, a method for manufacturing Japanese paper or the like. The resonance circuit 1 is embedded in the paper 12 by weaving in the process of manufacturing the paper 24. The electronic authentication sheet 23 also determines that the electronic authentication sheet 9 is a correct regular electronic authentication sheet by transmitting a radio wave having the same frequency as that transmitted from the reader (14 in FIG. 3). Can do.

  On the other hand, if the radio wave from the reader emits a radio wave with a frequency different from the corresponding radio wave, or does not transmit at all, it indicates that the electronic authentication sheet being inspected is not a regular authentication sheet. ing. As a result, the authenticity of the electronic authentication sheet can be reliably checked, and counterfeiting can be prevented.

  In addition, it is possible to embed the combination resonance circuit (19 in FIG. 4) instead of the resonance circuit 1 embedded in the electronic authentication sheet 23. The prevention effect is further strengthened.

  Hereinafter, Example 4 will be described in detail with reference to FIGS. 6 and 7. FIG. 6A shows the main part of the electronic authentication sheet. FIG. 6B shows a longitudinal sectional view of the resonance circuit. FIG. 7A shows a plan view of the electronic authentication sheet, and FIG. 7B shows a longitudinal sectional view of the electronic authentication sheet.

  In FIG. 6, reference numeral 25 denotes a resonance circuit sheet used in place of the resonance circuit (1 in FIG. 1). The resonance circuit sheet 25 is substantially the same size as the sheet (12 in FIG. 2). A resonance circuit 27 having substantially the same configuration as that of the resonance circuit (1 in FIG. 1) is formed at a predetermined position of the insulating base 26 formed in the area (area). A coil pattern 28 and a capacitor pattern of the resonance circuit 27 are formed. Metal thin films 30 and 30 made of the same material as the coil pattern 28 and the capacitor pattern 29 are fixed to the front surface and the back surface of the insulating base material 26 outside 29.

  In FIG. 7, reference numeral 31 denotes an electronic authentication sheet, and the electronic authentication sheet 31 is an adhesive 34 between an upper paper 32 and a lower paper 33 that are formed in substantially the same size (area) as the resonance circuit sheet 25. The electronic circuit sheet 25 is attached to the electronic authentication sheet 31 and the electronic authentication sheet 31 can obtain substantially the same effect as the electronic authentication sheet (9 in FIG. 2). Since the sheet 31 is formed substantially flat without the upper paper 32 and the lower paper 33 being swollen, there is an advantage that the appearance is improved and the resonance circuit 27 is not noticed inside.

  In the electronic authentication sheet 31, the resonance circuit sheet 25 has the metal thin films 30, 30 attached to the outside of the resonance circuit 27, but a configuration in which the metal thin films 30, 30 are not attached is also possible. Alternatively, instead of the metal thin films 30 and 30, paper, a resin sheet or the like may be stuck, and in that case, substantially the same effect can be obtained.

  In the electronic authentication sheets 9, 18, 23, and 31, the resonance circuits 1, 19, and 27 can be embedded in an arbitrary place depending on the form to be used. Will not be damaged.

  Furthermore, in the above-described embodiment, the paper is used as the sheet. However, instead of the paper, an insulating film made of a resin sheet such as a polymer film may be used. Can be obtained. In this case, it is possible to integrally mold the sheet so as to embed the resonance circuit, or after drilling the sheet and embedding the resonance circuit, the resonance circuit is made of resin or the like. Various production methods such as coating are conceivable, and in that case, the same effect can be expected. In addition, the sheet can be formed of other materials, for example, non-conductive materials such as rubber, fiber, and cloth, and the same effect can be expected.

  Furthermore, the electronic authentication sheet 31 has been described using a single resonance circuit, but it is also possible to provide a combination resonance circuit having a plurality of resonance circuits. Further strengthened.

  The electronic authentication sheets 9, 18, 23, and 31 are sheets, but the same configuration can be realized with a card instead of the sheet, and in that case, substantially the same effect can be obtained. it can.

  The present invention can be modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

(A) The top view of the resonance circuit which shows one embodiment of this invention and is used for an electronic authentication sheet. (B) The longitudinal cross-sectional view of the resonance circuit shown to Fig.1 (a). (A) The top view of an electronic authentication sheet | seat which shows one embodiment of this invention. (B) The longitudinal cross-sectional view of the electronic authentication sheet | seat shown to Fig.2 (a). BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing of an electronic authentication system which shows one embodiment of this invention. (A) The top view of an electronic authentication sheet | seat which shows one embodiment shown in Example 2. FIG. (B) The longitudinal cross-sectional view of the electronic authentication sheet | seat shown to Fig.4 (a). (A) The top view of one embodiment shown in Example 3 and an electronic authentication sheet. (B) The longitudinal cross-sectional view of the electronic authentication sheet | seat shown to Fig.4 (a). (A) The top view of the resonance circuit sheet | seat which shows one embodiment shown in Example 4. FIG. (B) The longitudinal cross-sectional view of the resonance circuit sheet | seat shown to Fig.4 (a). (A) The top view of one embodiment shown in Example 4 and an electronic authentication sheet. (B) The longitudinal cross-sectional view of the electronic authentication sheet | seat shown to Fig.4 (a).

Explanation of symbols

1, 20, 21 Resonant circuit 2 Insulating substrate 3 Coil pattern 6 Capacitor pattern 9, 18, 23, 28 Electronic authentication sheet 12 Paper 14 Reader

Claims (8)

  An electronic authentication sheet, which is a sheet that requires authentication, and in which a resonance circuit composed of a coil and a capacitor is embedded.   2. The electronic authentication sheet according to claim 1, wherein the resonance circuit has a resonance frequency set to a unique value.   The resonance circuit includes a plurality of resonance circuits, and the plurality of resonance circuits have different resonance frequencies, and are configured to form identification information by a combination of the different resonance frequencies. The electronic authentication sheet according to claim 1 or 2.   4. The electronic authentication sheet according to claim 1, wherein the sheet is formed by adhering a plurality of sheets, and the resonance circuit is sandwiched between the plurality of sheets.   5. The electronic authentication sheet according to claim 1, wherein the sheet is a sheet.   The electronic authentication sheet according to claim 1, 2, 3, or 4, wherein the sheet is a resin sheet made of a polymer material.   The resonance circuit is formed by fixing a coil pattern constituting the coil and a capacitor pattern constituting the capacitor to an insulating base material, and the insulating base material is formed in substantially the same area as the sheet. The electronic authentication sheet according to claim 1, 2, 3, 4, 5, or 6. 8. An electronic authentication sheet according to claim 1, and a reader for reading a resonance frequency of a resonance circuit embedded in the electronic authentication sheet, wherein the electronic authentication is performed by the reader. An electronic authentication system characterized in that the electronic authentication sheet can be checked for authenticity or separated by identifying the sheet.

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