JP2008016933A - Certificate issuance verification system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a user with information and a printed document for verifying the authenticity and completeness of a certificate published to a plurality of pages. <P>SOLUTION: A certificate issuance apparatus 1 performs image processings for superimposing an additional information padding image 45 embedding a pattern 41, including the print data 411 of a certificate 4 compression encoded by issuance application operation, hash value 412 of the entire print data, hash value 413 of page print data, and document identification information 414 of the certificate 4 as a patterned image over the entire surface on the image of the certificate 4, and printing the composited image by means of a certificate printer 3; and registers the information of the pattern 41 in an issuance record 55. An apparatus 7 for verifying certificate extracts the pattern 41 from the image data read out from the certificate 4 by means of a scanner 6 and displays the hash value extracted from the pattern 41, the hash value formed of the print data restored from the pattern 41, and the hash value recorded in the issuance record 55, on an analysis result output monitor 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a certificate issuance verification system that manages certificate issuance, history of issued certificates, and provides users with information necessary for verification of issued certificates, and in particular, print data of certificates. The value generated using the one-way function from the certificate is printed on the certificate, and the image embedded in the entire certificate is superimposed on the certificate image as a pattern image of the value generated using the one-way function. Print and issue, record and manage log information including one-way function, print data, identification information of issued certificate, value printed on issued certificate and pattern on the entire surface of the certificate The present invention relates to a technique for providing a user with a value acquired by analyzing a pattern printed as a digitized image, and further, a value stored in log information as information necessary for verifying the integrity and authenticity of a certificate. .

  Conventionally, the authenticity of a printed document such as a certificate is often determined by an imprint imprinted on the document, but recently, a digitally processed imprint image is used as a certificate stamp. In some cases, the recent development of image processing technology tends to facilitate the forgery of documents such as certificates.

  For this reason, various techniques for detecting forgery and falsification of documents have been disclosed.

  For example, “Certificate Confirmation Method, Certificate Confirmation Program, and Certificate” disclosed in Patent Document 1 is disclosed.

In the technique of Patent Document 1, in a certificate management system, a certification code and certification content data are transmitted to a printer, and the printer prints a certificate on a sheet with a watermark for copy protection, and a cellular phone. The terminal reads the hash value of the certification code printed on the certificate and transmits the read data to the certificate management system. The certification management system stores the hash value transmitted from the mobile phone terminal and the certificate when it is issued. The hash value recorded in the means is compared, and the certificate authenticity confirmation result is transmitted to the portable terminal.
JP 2005-204250 A.

  In the invention of Patent Document 1, in order to confirm the authenticity by comparing the hash value of the certification code printed on the certificate with the hash value recorded in the storage means when creating the certificate, Communication processing between the mobile phone terminal and the management system is necessary, and when a communication failure occurs, there is a problem that both hash values cannot be verified and the authenticity cannot be confirmed.

  Also, in the management system, the hash value generated at the time of certificate issuance is recorded and managed in the storage means of the management device. If the recorded hash value is altered by unauthorized access, the authenticity judgment is made. There is a problem of being mistaken.

  Further, in the case where the certificate is a document composed of a plurality of pages, even if the authenticity of the contents printed on the page of the certificate 4 to be verified can be confirmed, the integrity (page And the presence or absence of falsification due to malicious page deletion or addition).

  Therefore, the present invention can be easily implemented by a user when verifying the authenticity and integrity of an issued certificate, and in particular, authenticity of a certificate composed of a plurality of pages. The present invention provides a certificate issuance verification system capable of providing a user with information for easily performing integrity verification.

  In order to achieve the above object, the invention of claim 1 is a certificate issuance verification system for issuing and verifying a certificate. A value generated from the print data of the certificate using a one-way function is stored in the certificate. A certificate issuing device that prints and issues the certificate by patterning at least the value of the certificate and printing the certificate, and the value printed on the certificate issued by the certificate issuing unit as log information Value stored in the management device, the value printed on the certificate issued by the certificate issuing device and the value obtained by analyzing the pattern printed on the entire surface of the certificate And a certificate verification device for verifying whether or not the certificate has been tampered with.

  According to the invention of claim 2, the certificate issued from the certificate issuing device is composed of a document of a plurality of pages, and the certificate issuing device generates the first certificate generated from the data of all pages of the certificate using a one-way function. A value of 1 and a second value generated from the data of each page of the certificate using a one-way function are printed on each page of the certificate, and the first value is printed on the entire surface of each page of the certificate. The value and the second value are patterned and printed, respectively, and the certificate is issued. The management apparatus stores the first value and the second value as log information, and the certificate verification apparatus stores the certificate. The first value and the second value read from each page, respectively, and the first value and the second value acquired from the analysis of the pattern of each page, respectively, are stored in the management device. The proof is obtained by checking each value. Calligraphy and performs verification of whether it is tampered with.

  According to a third aspect of the present invention, in the second aspect of the invention, the certificate issuing device includes a certificate issuance application accepting unit for accepting a certificate issuance application from the certificate issuance application terminal, and a certificate issuance application accepting unit. A print data generation unit that generates print data to be printed on a certificate issued based on the received certificate issuance application, and a one-way function from the print data of all pages and the print data of each page generated by the print data generation unit Value generating means for generating a first value and a second value to be printed on each page of the certificate, and each of the certificates based on the first value and the second value generated by the value generating means Pattern generation means for generating a pattern to be printed on the entire surface of the page, print data generated by the print data generation means, and a first value and a second value generated by the value generation means Characterized by comprising a printing means for printing by superimposing the pattern generated by the value and the pattern generating means on each page of the certificate.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the certificate verification device includes an image reading unit that reads an image from each page of the certificate, and an image of each page that is read by the image reading unit. Extraction means for extracting each of the first value and the second value; and acquisition means for analyzing the pattern of the image of each page read by the image reading means to obtain the first value and the second value, respectively; The first value and the second value extracted by the extracting unit and the first value and the second value acquired by the acquiring unit are respectively compared with the first value and the second value stored in the management device. And verifying means for verifying whether or not the certificate has been tampered with.

  According to the certificate issuance verification system of the present invention, the certificate print data, the hash value generated from the print data of the entire certificate, and the certificate embedded as additional information in the certificate image at the time of certificate issuance Since the hash value generated from the print data of each page can be extracted from the image read data of the certificate, not only the authenticity of the certificate printed on each page is verified, but also the certificate Can be provided to the user for verifying the presence or absence of falsification, such as missing pages or additional page-by-page deletions.

  In addition, in order to determine the authenticity and completeness of the certificate, additional information embedded in the certificate image is patterned on the entire surface of the certificate and embedded in the image, making it difficult to tamper with the additional information. It can be embedded in the certificate, and the success rate of reading the additional information embedded in the certificate can be enhanced with respect to dirt or damage of a part of the certificate.

  Embodiments of a certificate issuance verification system according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram illustrating a configuration example of a certificate issuance verification system and a functional configuration of devices belonging to the system.

  In FIG. 1, the certificate issuance verification system prints and issues a certificate 4 and issues a certificate issuance apparatus 1 that registers and manages log information of the issued certificate 4 as an issuance history 55 for each page. The management database 5 reads the issued certificate 4 image, extracts information necessary for the user to verify the authenticity and completeness of the certificate 4, and verifies the extracted result on a monitor or prints on paper Device 7.

  The certificate issuing device 1 generates print data of the certificate 4 based on the certificate 4 issue application operation performed at the application terminal 2 and prints the certificate 4 with the certificate printing printer 3. Print control is performed to print the certificate 4 in which additional information (hereinafter referred to as “pattern 41”) for ensuring the authenticity of the certificate 4 is embedded in a pattern.

  The certificate issuance management database 5 is a document that is assigned and managed at the time of issuance in order to identify each printed certificate as page information as log information of the issued certificate 4 (hereinafter referred to as “issue history 55”). The identification information 54, the print data 51 of the certificate 4, the hash value 52 generated based on the print data of the entire certificate 4, and the page print data hash value 53 generated based on the print data for each page of the certificate 4 are recorded. And manage.

  The certificate verification apparatus 7 performs image reading processing of the certificate 4 with a predetermined resolution by the scanner 6, and a pattern 41 in which additional information is embedded as an image patterned on the entire surface of the certificate 4 is stored in the scanner 6. It is extracted by the analysis process of the image data of the certificate 4 read in this way, and the additional data recorded in the extracted pattern 41 is read, and the analysis data for the user to verify the authenticity and integrity of the certificate 4 The verification device analysis information 10 is created, the created verification device analysis information 10 is printed by the analysis result output printer 8, and the verification device analysis information 10 is displayed on the analysis result display monitor 9.

  The certificate 4 issued by the certificate issuing device 1 includes a print data hash value printing unit 42 that prints a hash value of the entire print data generated from the print data of the certificate 4 and page data of the print data. It has a page print data hash value printing unit 43 on which the generated hash value is printed.

  Further, the certificate 4 includes a hash value of the entire print data printed on the print data hash value printing unit 42, a page print data hash value printed on the page print data hash value printing unit 43, and printing of the certificate 4. Print data 411 in which data is compressed and encoded by a predetermined method, and document identification which is identification information of the certificate 4 which is given when the certificate 4 is issued and registered and managed in the certificate issuance management database 5 An image (hereinafter referred to as an additional information embedded image 45) obtained by patterning the pattern 41 recorded in the predetermined format with the information 414 as additional information on the entire surface of the sheet on which the image of the certificate 4 is printed is the certificate 4 It is embedded in the image.

  The authenticity and integrity of the certificate 4 are verified by checking the print data hash value printing unit 42 printed on the certificate 4, the hash value recorded in the page print data hash value printing unit 43, and the certificate verification device 7. This is performed by the user comparing and collating the hash values in the verification device analysis information 10 printed or displayed on the screen.

  The verification device analysis information 10 includes the hash value (101) of the print data of the entire certificate regenerated from the print data read and restored from the pattern 41 extracted from the certificate 4 by the certificate verification device 7, and the certificate 4 The hash value (102) of the page print data generated from the page print data and the print data hash read from the issue history 55 of the certificate issue management database 5 using the certificate identification information 414 read from the pattern 41 extracted from the certificate 4 A value 52 and a page print data hash value 53.

  The certificate issuing device 1 includes an application receiving unit 11, a print data generating unit 12, a pattern generating unit 13, a print data analyzing unit 14, and a print data composition output unit 15 as functional blocks for printing and issuing the certificate 4. A print data transmission unit 16 and a database control unit 17.

  Upon detecting an operation requesting issuance of the certificate 4 in the application terminal 2, the application receiving unit 11 analyzes the input operation, identifies the type of the certificate 4 to be issued, and prints the certificate 4 of the identified type. Necessary data or parameters are extracted based on the input data in the application terminal 2.

  The print data generation unit 12 generates print data of the certificate 4 to be issued based on the type of the certificate 4 to be issued specified by the application reception unit 11 and the data extracted by analyzing the input data. .

  The print data analysis unit 14 generates a page image of a document image indicating the contents of each page of the certificate 4 as an intermediate image based on the print data of the certificate 4 generated by the print data generation unit 12.

  The pattern generation unit 13 performs predetermined compression processing and encoding processing on the print data of the certificate 4 generated by the print data generation unit 12 and prints the certificate 4 document image to be embedded in the certificate 4 Print data (411) that is compressed and encoded by a predetermined method, generates a hash value (412) of the entire print data, and a hash value (413) of the page print data of the certificate 4, respectively. 4 Generate the document identification information (414) of the certificate 4 to be assigned, and form the pattern 41 by shaping and connecting the generated data in a predetermined format.

  The print data composition output unit 15 creates images of the print data hash value printing unit 42 and the page print data hash value printing unit 43 to be printed on the certificate 4, and generates an intermediate image generated by the print data analysis unit 14. And an image (additional information embedded image 45) for embedding the pattern 41 created by the pattern generation unit 13 in a pattern on the entire surface of the sheet on which the certificate 4 is printed. ), The image of the print data hash value printing unit 42 and the page print data hash value printing unit 43 and the intermediate image of the page image of the certificate 4 are combined, and the additional information embedded image 45 is further added to the combined image. Is performed, and a final page image of the certificate 4 to be printed by the certificate printing printer 3 is created.

  Then, the print data composition output unit 15 outputs the created page image to the certificate printing printer 3 and performs printing control of the certificate 4 for the certificate printing printer 3.

  The print data sending unit 16 compresses the print data hash value 412 and the page print data hash value 413 created by the pattern generation unit 13 and the print data created by the print data generation unit 12 by a predetermined method. The registration data for registering the print data 411 encoded and the document identification information 414 of the issued document 4 in the certificate issuance management database 5 as the issuance history 55 of the certificate 4 is created. The database control unit 17 is instructed to perform issue history registration processing for the certificate issuance management database 5 based thereon.

  The database control unit 17 uses the print data 51 of the certificate 4 and the print data hash value 52 generated from the print data of the entire certificate 4 based on the registration data of the issue history 55 created by the print data transmission unit 16. The page print data hash value 53 created based on the print data of each page of the certificate and the document identification information 54 assigned to the certificate 4 are registered in the certificate issuance management database 5.

  The certificate verification apparatus 7 includes a verification read image reception unit 71 and a database control unit 72 as functional blocks for extracting information necessary for verifying the certificate 4 and printing a certificate confirmation document. A pattern analysis unit 73, a print data analysis unit 74, a display control unit 75, and a print control unit 76.

  The verification read image reception unit 71 receives the read image data of the certificate 4 read by the scanner 6 at a predetermined resolution from the scanner 6 and temporarily stores it in the storage unit.

  The pattern analysis unit 73 analyzes the read image data of the certificate 4 temporarily stored in the storage unit by the verification read image reception unit 71 and embeds additional information embedded as a patterned image in the entire certificate 4 The pattern 41 is extracted from the image 45 and is compressed and encoded. The print data 411 of the certificate 4, the hash value 412 generated from the print data of the entire certificate, and the page generated from the page print data of the certificate 4 The print data hash value 413 and the document identification information 414 to which unique information is assigned to the issued certificate 4 are separated based on the format when the certificate issuing device 1 performs the embedding process. Read.

  The print data analysis unit 74 restores the compression-coded print data 411 read by the pattern analysis unit 73 to the original print data, and based on the restored print data, the hash of the print data of the entire certificate 4 A regenerated print data hash value 101 that is a value and a regenerated page print data hash value 102 that is a hash value of each page print data of the certificate 4 are generated.

  Then, the print data analysis unit 74 generates the generated regenerated page print data hash value 102, the regenerated print data hash value 101, the print data hash value 412 read from the pattern 41 by the pattern analysis unit 73, and the page print data hash value. If the issuance history 55 can be read from the certificate issuance management database 5 based on the document identification information 414, the document identification information 414, the print data hash value 52 recorded in the read issuance history 5, the page print data The hash value 53 is read to create verification device analysis information 10 for the user to verify the authenticity and integrity of the certificate 4.

  The display control unit 75 performs display control of various screens on the analysis result output monitor 9, and performs display control for displaying the verification device analysis information 10 created by the print data analysis unit 74 on the analysis result output monitor 9. Do.

  The print control unit 76 performs print control for the analysis result output printer 8, outputs the verification device analysis information 10 to the paper, or extracts from the pattern 41 and restores the print data 411 or the certificate issuance management database 5. The reprint control of the certificate 4 based on the read print data 51 is performed.

  The database control unit 72 issues the certificate 4 issue history 55 (print data 51, print data hash value 52) registered in the certificate issue management database 5 when the certificate 4 is printed by the certificate issuing device 1. The page print data hash value 53) is read from the issuance history 55 for a registration record corresponding to the document identification information 54 that matches the document identification information 414 extracted from the pattern 41.

  Next, a certificate issuance process performed by the certificate issuance apparatus 1 when a certificate 4 issuance request operation is performed from the application terminal 2 will be described with reference to the flowchart of FIG.

  The certificate issuing device 1 generates print data for the certificate 4 (S101), and generates a hash value for the entire generated print data and a print data hash value for each page (S102).

  The certificate issuing device 1 creates a page image of an image indicating the contents of the certificate 4 based on the print data (S103).

  Next, the certificate issuing device 1 prints the print data hash value printing unit 42 printed on the certificate 4 based on the hash value of the entire print data created in step S102 and the hash value of the print data of each page, and An image of the page print data hash value printing unit 43 is created, and image processing is performed to add and synthesize the page image of the document image indicating the contents of the certificate 4 generated in step S103 (S104).

  Next, print data 411 is generated by compressing and encoding the print data generated in step S101 by a predetermined method, and the hash value 412 of the print data of the entire certificate generated in step S102, the page print data A pattern 41 in which the hash value 413 and the document identification information 414 to be given to the certificate 4 are shaped and connected in a predetermined format is created (S105), and the created pattern 41 is created on the entire page of the certificate 4 An additional information embedded image 45 for embedding by patterning is created, and the image of the certificate 4 is created by combining the images of the print data hash value printing unit 42 and the page print data hash value printing unit 43. Image processing for superimposing and synthesizing the additional information embedded image 45 is performed to create a final page image of the certificate 4 (S10). ), The print control for forming on a sheet an image certificate 4 based on the page image created, performed on the certificate printing printer 3 (S107).

  When the printing process of the certificate 4 is completed, the document attached to each page of the certificate 4 on which the print data 51, the print data hash value 52, and the page print data hash value 53 of each page are printed. The issuance history 55 of the certificate 4 for recording and managing each identification information 54 is registered in the certificate issuance management database 5 (S108).

  Next, the extraction process of the analysis result output information 10 by reading the image of the certificate 4 in the certificate verification apparatus 7 will be described with reference to the flowchart of FIG.

  The certificate verification apparatus 7 reads the image of the certificate 4 with the scanner 6 at a predetermined reading resolution to generate read image data (S201), and patterns the additional information embedded image 45 from the read image data of the certificate 4. The extracted pattern 41 is extracted, the compression-coded print data 411 recorded in the extracted pattern 41, the print data hash value 412, the page print data hash value 413, and the document identification information 414 Are extracted separately based on the format at the time of embedding by the certificate issuing device 1 (S203).

  The compressed and encoded print data 411 extracted from the pattern 41 is restored to the original print data, the hash value (101) of the print data of the entire certificate 4 and the hash of each page print data of the certificate 4 Each value (102) is regenerated (S204).

  The certificate verification apparatus 7 uses the hash value (print data hash value 412, page print data hash value 413) extracted from the pattern 41 in step S203 and the print data 411 extracted from the pattern 41 in step S204. The regenerated hash value (regenerated print data hash value 101, regenerated page print data hash value 102) is read from the certificate issuance management database 5 using the document identification information 414 of the certificate 4 read from the pattern 41. The verification device analysis information 10 is generated based on the issued history 55 (print data hash value 52, page print data hash value 53), and the generated verification device analysis information 10 is output to the analysis result display monitor 9 (S205). .

The print data restored from the print data 411 read from the pattern 41 or the certificate 4 using the print data 51 read from the certificate issuance management database 5 by the document identification information 414 of the certificate 4 read from the pattern 41 When a reprint operation is detected, or when certificate reprint processing settings are set in advance in the control information of the certificate verification apparatus 7 (YES in S206), the certificate verification apparatus 7 The reprint control of the certificate 4 based on the print data 411 restored from the print data 41 or the print data 51 read from the certificate issuance management database 5 is performed on the analysis result output printer 8 to reprint the certificate 4 Is created (S207).
Next, the hash value of the print data of the entire certificate 4 necessary for confirming the authenticity and completeness of the certificate 4 obtained by the image reading process of the certificate 4 shown in FIG. Certificate using page print data hash value and print data restored from pattern 41 or print data 51 read from certificate issuance management database by document identification information 414 of certificate 4 acquired from pattern 41 A method for confirming the authenticity and integrity of the certificate 4 based on the reprinted document No. 4 will be described.

  First, it is confirmed whether the print data hash value 412 of the entire certificate read from the pattern 41 matches the regenerated print data hash value 101 displayed on the analysis result display monitor 9 as the verification device analysis information 10. If the two hash values match, then the comparison of the hash value 412 of the page print data generated for each page of the certificate 4 and the regenerated page print data hash value 102 is performed.

  If the hash values (412 and 101) of the print data of the entire certificate 4 do not match, or the hash values of the print data of the entire certificate 4 match, but the hash values (413 and 102) of the page print data match If there is a page that is not to be printed, the certificate verification apparatus 7 reprints the certificate 4 using the print data 411 restored from the pattern 41, and the print output result of the reprinted document and the certificate 4 to be verified. And verifying the authenticity of each page by checking for differences in the images printed on each page, and whether there are missing pages or whether pages are added or deleted due to fraud Confirm.

  Also, if the hash values (412 and 101) of the print data of the entire certificate 4 do not match, or if the hash values (413 and 102) of the page print data do not match, the certificate displayed on the analysis result display monitor 9 The hash value 52 of the print data of the entire certificate recorded in the issue history 55 read from the issue management database 5, the hash value 53 of the page print data, the hash value extracted from the pattern 41, and the hash printed on the certificate 4 Investigation to identify the cause, timing, and target of unauthorized alteration of the certificate 4 by comparing and collating the contents of the values (print data hash value printing unit 52, page print data hash value printing unit 53) I do.

  The hash value registered and managed in the certificate issuance management database 5 is A, the print data hash value 412 restored from the pattern 41 embedded in the certificate 4 and the page print data hash value 413 are B. When the hash value printed on the print data hash value printing unit 42 and the page print data hash value printing unit 43 of the certificate 4 is C, the collation result by the combination of each value of A, B, C and the collation The method of identifying the cause of falsification based on the results is shown below.

(Verification result 1)
When A = B = C, it can be confirmed that the certificate 4 has not been tampered with.

(Verification result 2)
If only the value of A is different, there is a possibility of either falsification of registered data due to unauthorized access to the certificate issuance management database 5, or falsification of print data of the certificate 4 or hash value printed on the certificate 4. There is.

(Verification result 3)
If only the value of B is different, there is a possibility that the pattern data embedded as additional information in the image of the certificate 4 has been tampered with.

(Verification result 4)
If only the value of C is different, the hash value printed on the certificate 4 may have been falsified.

(Verification result 5)
If all the values of A, B, and C do not match, falsification of the issue history 55 due to unauthorized access to the certificate issuance management database 5, or falsification of the pattern 41 when the pattern 41 is generated or embedded, the certificate There is a possibility that any two or more of the alterations to the hash value printed in 4 have been performed.

  In the case other than the collation result 1, the certificate 4 is further reprinted, the print result of the reprinted document and the number of printed pages, the contents of the certificate 4 to be verified, and the page of the certificate 4 Check for differences in numbers.

  The certificate issuance verification system of the present invention prints a certificate in which additional information for assuring the authenticity of the certificate is embedded in an image, and issues an issue history including additional information of the printed certificate and print data in a database. It can be used for systems that register, manage, and read additional information embedded in certificates by image reading processing of issued certificates, devices that issue certificates belonging to the system, and devices that read additional information Yes, especially when dealing with certificates consisting of multiple pages.

1 is a block diagram showing a schematic configuration example of a certificate issuance verification system of the present invention. 3 is a flowchart showing an example of certificate issuing processing in the certificate issuing device shown in FIG. 1. 3 is a flowchart showing an example of certificate verification processing by reading a certificate image in the certificate verification apparatus shown in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Certificate issuing apparatus 11 Application reception part 12 Print data generation part 13 Pattern generation part 14 Print data analysis part 15 Print data synthetic | combination output part 16 Print data transmission part 17 Database control part 2 Application terminal 3 Certificate printing printer 4 Certificate 41 pattern 411 print data 412 print data hash value 413 page print data hash value 414 document identification information 42 print data hash value print unit 43 page print data hash value print unit 45 additional information embedded image 5 certificate issuance management database 51 print data 52 Print data hash value 53 Page print data hash value 54 Document identification information 55 Issuance history 6 Scanner 7 Certificate verification device 71 Verification read image reception unit 72 Database control unit 73 Pattern analysis unit 74 Print data analysis Unit 75 Display control unit 76 Print control unit 8 Analysis result output printer 9 Analysis result display monitor 10 Verification device analysis information 101 Regenerated print data hash value 102 Regenerated page print data hash value

Claims (4)

In the certificate issuance verification system that issues and verifies certificates,
A certificate issuance in which a value generated by using a one-way function from the print data of the certificate is printed on the certificate, and at least the value is patterned and printed on the entire surface of the certificate to issue the certificate A device, a management device for storing the value printed on the certificate issued by the certificate issuing means as log information, a value printed on the certificate issued by the certificate issuing device, and the certificate A certificate verification device that verifies whether or not the certificate has been tampered with by comparing a value obtained by analyzing a pattern printed on the entire surface of the document with a value stored in the management device; A certificate issuance verification system characterized by comprising: The certificate issued from the certificate issuing device consists of a multi-page document,
The certificate issuing device includes:
A first value generated from the data of all pages of the certificate using a one-way function and a second value generated from the data of each page of the certificate using a one-way function, respectively. Printing the page, and patterning the first value and the second value on the entire surface of each page of the certificate and printing the certificate to issue the certificate,
The management device
Storing the first value and the second value as the log information;
The certificate verification device includes:
The first value and the second value respectively read from each page of the certificate and the first value and the second value obtained from the analysis of the pattern of each page are stored in the management device. 2. The certificate issuance verification system according to claim 1, wherein verification is performed as to whether or not the certificate has been tampered with by checking each of the first value and the second value. The certificate issuing device includes:
A certificate issuance application acceptance means for accepting a certificate issuance application from a certificate issuance application terminal;
Print data generation means for generating print data to be printed on a certificate issued based on the certificate issuance application accepted by the certificate issuance application acceptance means;
The first value and the second value to be printed on each page of the certificate are generated from the print data of all pages generated by the print data generation unit and the print data of each page using a one-way function, respectively. Value generation means to
Pattern generating means for generating the pattern to be printed on the entire surface of each page of the certificate based on the first value and the second value generated by the value generating means;
The print data generated by the print data generation unit, the first value and the second value generated by the value generation unit, and the pattern generated by the pattern generation unit are displayed on each page of the certificate. The certificate issuance verification system according to claim 2, further comprising: a printing unit configured to superimpose and print. The certificate verification device includes:
Image reading means for reading an image from each page of the certificate;
Extraction means for extracting each of the first value and the second value from the image of each page read by the image reading means;
Obtaining means for analyzing the pattern of the image of each page read by the image reading means to obtain the first value and the second value, respectively;
The first value and the second value extracted by the extraction means, and the first value and the second value acquired by the acquisition means are stored in the management device, and 3. The certificate issuance verification system according to claim 2, further comprising verification means for verifying whether or not the certificate has been tampered with by checking each of the second values.

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