JP2003323512A - Printing and copying system with time stamp having prevention function of tampering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing system with a time stamp having a tampering prevention function for easily proving authenticity of electronic data of a printed matter printed and issued, preventing unauthorized use of a time stamp printed on the printed matter to surely prevent tampering and unauthorized use of the printed matter, and accurately verifying authenticity of a document printed and issued. <P>SOLUTION: When printing and issuing a document YA, the system prints and issues, at the same time, a time stamp Y3 generated at a normal time, a two-dimensional code Y1 obtained by converting printed print data to a two-dimensional code, and a two-dimensional code Y2 obtained by encoding information including a uni-directional function value calculated based on the printed print data and information used by a third institution for determining authenticity and converting the encoded information to a dimensional code. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tampering prevention function suitable for use when printing and issuing documents such as securities, commuter passes, travel tickets, various certificates, contracts, etc. Printing system with time stamp equipped with
For example, the present invention relates to a time stamped copying system having a falsification prevention function, which is suitable for use when an information disclosure window of an administrative agency copies and issues a recording document based on the Information Disclosure Law.

[0002]

2. Description of the Related Art In printing and issuing various documents as described above, even if the information to be issued is created by electronic data, it may still be more convenient to issue it as a printed matter that does not select media. is there. Also, in reality, not all issued documents can be replaced with electronic contents due to the convenience of the recipient.

There are many means for proving the authenticity of electronic contents, but securities printed on paper, commuter passes,
To prevent tampering or copying of travel tickets, various certificates, contracts, etc., copy protection paper or print toner that will cause hidden characters such as "invalid" or "copy" to appear in the copy when copied in order to prevent tampering and copying. There was only a method of using tamper-proof paper such as a method in which the paper and the paper are firmly connected, or a special recording paper of a special print fixing process that prevents overprinting.

On the other hand, regarding copying of a delivery document disclosed by a request for copying and delivering according to the above-mentioned Information Disclosure Law, in order to prevent falsification, hidden letters such as "invalid" and "copy" of a warning mark appear in the copy when copied. Copying is done using anti-counterfeit paper.

At this time, in response to a request for disclosure of an administrative document, it is not always possible to copy the original text itself, and there are full disclosure, full disclosure, partial disclosure, and the like. In the case of partial disclosure, the original text may be modified to exclude the non-open part. In this case, a block copy was made for copying, and a document for recording matters related to the request (administrative document disclosure request) was also copied.

[0006]

However, in order to falsify the printed matter, it is not only copied by a copying machine, but also read by a scanner and printed by changing the issue number and issue date and time using the same paper as the printed matter. However, there is a possibility that the image may be copied as it is, and as a countermeasure against that, the pattern or the like must be complicated, which causes a problem that the printing cost becomes high.

Further, when the electronic data which is the original is different from the printed matter which is actually printed / issued, it is easy to falsify the electronic data due to the nature of the electronic data, and there is no trace of falsification. It is difficult to prove the authenticity of electronic data when it is argued that it has been changed by the owner of the printed matter after it was printed and printed, and even if the original text of the electronic data was established with a time stamp. However, the proof that it is the electromagnetic data of the printed print / issued print has no countermeasure other than to keep a copy of the printed print / issued print, and the credibility cannot be effectively proved. was there.

Further, regarding the delivery document disclosed by the above-mentioned Information Disclosure Law, the date and time of making a copy copy and the date and time of copying thereof are determined by using the clock managed and used by the information disclosure window of the administrative agency. Therefore, the authenticity is not recognized by a third party, and further, even if the copied document is associated with the record document that matches the matters concerning the request for issuance, the possibility of falsification is also high. There is also a problem that it is expensive and cannot be effectively proved even if the credibility of the delivery document is confirmed.

Therefore, the technical problem of the present invention is to make it possible to easily prove the authenticity of electronic data of a printed matter printed and printed, and to prevent unauthorized use of the time stamp printed on the printed matter. To provide a time-stamped printing system with a falsification prevention function that can prevent falsification and unauthorized use of printed matter, and at the same time verify the authenticity of printed documents. Is.

Further, the technical problem of the present invention is to prevent forgery or falsification of a time stamp indicating the date and time of copying of a copy document, to prevent tampering, and to accurately determine the authenticity of the time stamp. A tamper-proof function designed to prevent unauthorized use of stamps on other copied documents, enhance the authenticity of the copied documents, and accurately verify the authenticity of the copied and issued documents. The purpose of the present invention is to provide a copying system with a time stamp.

[0011]

Means for Solving the Problems The measures taken by the present invention to solve the above technical problems are as follows.

A printing system with a time stamp for time stamping the time of issuance when printing and printing various documents. (1) When printing out the printed document, the printed document is printed on the printed document. On the other hand, from the time stamp information generated from standard time, the two-dimensional code that is the two-dimensional code of the print print data, the third organization including the certification body, or the print print data provided by the system that cooperates with the third organization. The calculated one-way function value and the two-dimensional code obtained by encrypting the information used by the third institution or the cooperative system for determining the authenticity, and further, the encrypted information is further two-dimensionally encoded. Configure to print. (Claim 1)

(2) When printing out each printed document,
The one-way function value calculated from the print print data and the license ID from the client system that is the issuer of the document to the third organization or its cooperation system.
If you request the issuance of a time stamp generated from standard time by sending information such as the above, the third party or its cooperation system checks the validity of the license ID, and if it is valid, the time based on the received standard time. The stamp information is generated and the print print data is two-dimensionally encoded. Furthermore, the license ID and the time stamp information, and the one-way function value calculated from the print print data, and the third organization or its cooperation. The system encrypts the forgery / unauthorized use prevention information used by the system for determination of authenticity, and two-dimensionally encodes the encrypted information. The two two-dimensional codes and the time stamp information are recorded in the document. It is transmitted to the client system that is the issuing source, and the two two-dimensional codes received by the client system and the tie code are received. Stamp information, be configured to print the document to the print output. (Claim 2)

(3) Reading means for reading the two two-dimensional codes printed on the issued document brought into the issuer to the client system of the issuer of the printed document, and one of the read two-dimensional codes One-way function value calculation means for calculating the one-way function value from the code, the calculated one-way function value, and the counterfeit / unauthorized use prevention information and the license which compose the other two-dimensional code read above. The third means or its cooperation system is provided with a communication means for transmitting the ID to the third party or its cooperation system to request verification, while the third means or its cooperation system is provided with a collation means for checking the validity of the license ID sent. Then, the forgery / unauthorized use prevention information is decrypted with a secret key, and the decrypted data is compared with the sent one-way function value to check the authenticity of the authenticity determination information. And a communication means for transmitting the verification result to the issuing client system. (Claim 3)

(4) A document issued by the publisher of the printed document is FA
When sent by X communication, reading means for reading the two two-dimensional codes from the sent fax document, and one-way function for calculating the one-way function value from the read two-dimensional code. The value calculation means, the collation means for checking the validity of the license ID read from the above two-dimensional code, and the counterfeit / unauthorized use prevention information also read from the two-dimensional code are decrypted with a secret key, and the decrypted data is obtained. And the above calculated one-way function value are collated to check the authenticity of the authenticity determination information, a printing means for reprinting the document from the read print data, and the above verification. Result and reprint
And a transmitting means for transmitting to the client system of the issuing source by X communication. (Claim 4)

A copying system with a time stamp for time stamping the time of copying when various documents are copied and issued. (5) Time stamp information generated from standard time when copying the above documents And a document or a cover thereof for encrypting the time stamp information and the anti-counterfeiting information, and generating a two-dimensional code by further converting the encrypted information into a two-dimensional code, and copying the time stamp information and the two-dimensional code. It should be configured so that it will be printed and published on. (Claim 5)

(6) At the time of copying each document, the license ID, copy acceptance number, etc. from the client system, which is the copy source of the document, to the third institution including the certification institution, or a system in cooperation with the third institution. When the third party or its cooperation system checks the validity of the license ID and sends a request to issue a time stamp, the time stamp information is generated based on the received standard time. And generation of forgery / unauthorized use prevention information, encryption of the license ID, copy acceptance number, time stamp information and forgery / unauthorized use prevention information, and two-dimensional encoding of each encrypted information,
The two-dimensional code is transmitted to the digital copying machine of the copy source, and the two-dimensional code and the time stamp are printed on the document to be copied or its cover. (Claim 6)

(7) The document to be copied is a disclosure document based on the Information Disclosure Law, and the client system provided at the information disclosure window of the administrative agency sends the license ID, copy acceptance number, etc. to the third organization or its cooperation system. When sending identification information and requesting issuance of a time stamp, individual information such as the name of the disclosed document, the name of the claimant, and the contact information is also input, while the above information is sent from the third organization or its cooperation system. When the two-dimensional code and the time stamp information are transmitted to the client system of the disclosure window, the above individual information is also sent together to the digital multifunctional device of the information disclosure window, and the above-mentioned information is displayed on the cover of the document to be copied. Configure to print each individual information, two-dimensional code and time stamp. (Claim 7)

(8) The forgery / unauthorized use prevention information and the license ID are obtained from the copied document brought into the copy source or the information disclosure window to the client system provided in the document copy source or the information disclosure window. The reading means for reading the two-dimensional code of the information obtained by encrypting the time stamp information and the copy acceptance number, and the communication means for transmitting the information of the read two-dimensional code to the third organization or its cooperation system to request verification are provided. On the other hand, to the third organization or its cooperation system, the collation means for checking the validity of the license ID transmitted and the forgery / unauthorized use prevention information are decrypted with the secret key, and the decrypted data is transmitted. Check the copy receipt number and time stamp information above,
The verification / verification means for checking the authenticity of the authenticity determination information, and the communication means for transmitting the verification result to the client system of the copy source or the information disclosure counter. (Claim 8)

(9) When the copied document is sent by fax communication from the information disclosure window of the copying source of the copied document or the administrative agency to the third organization or its cooperation system. A reading means for reading the two-dimensional code of the forgery / unauthorized use prevention information, the license ID, the time stamp information, and the information obtained by encrypting the copy acceptance number from the FAX document; and a collating means for checking the validity of the read license ID. , The read forgery / unauthorized use prevention information is decrypted with a private key, and the decrypted data is collated with the above-mentioned read time stamp information and copy acceptance number to check the authenticity of the authenticity determination information. Means and communication means for sending the verification result to the above-mentioned copy source or information disclosure window by FAX communication. (Claim 9)

(10) As a printing or copying sheet for printing the two-dimensionally encoded forgery / unauthorized use prevention information, when these printed or copied sheets are set in a copying machine and copied, A copy protection paper in which a warning mark or a copy protection character such as invalid or copy is displayed on the copy, a method in which the printing toner and the paper are firmly connected, or a special printing that prevents overprinting Use anti-counterfeit paper such as special recording paper for the print fixing process.
(Claim 10)

(11) When a document to be printed or issued for copying has a plurality of pages, the time stamp watermark may be added to a sheet of two or more pages for printing or copying. (Claim 11)

A method according to any one of claims 1 to 4 above.
According to the means of 4 to 4, two two-dimensional codes printed on the printed matter, that is, the two-dimensional code of the print data for printing and the two-dimensional code of information obtained by encrypting the forgery / unauthorized use prevention information, and the electronic data By collating both one-way function values (for example, a hash value) with and, it is possible to prove that the printed data is electronic data (print print data).

In order to prevent tampering, a license ID, a one-way function value (for example, a hash value), a time stamp, and information used by a third organization (certificate authority) for authenticity determination ( Since the information that is the two-dimensional code of the encrypted information (forgery / unauthorized use prevention information) is printed, the authenticity can be determined even if the time stamp is tampered with. This makes it possible to take measures to prevent tampering by duplicating the information used for judging false.

Further, since the two-dimensional coded information issued / printed by the third organization (certification organization) includes one-way function value (for example, hash value) information, the time stamp is not included in other information. If the document is copied and used, the illegal use is found, and the illegal use of the time stamp can be surely prevented. In addition, by reading the two-dimensional code of the print print data including the issue number information of the issued / collected printed matter with a two-dimensional code reader, it can be converted into electronic data, so that the issue number can be easily verified. , Third party (certification body), license ID
And, since it is possible to prevent forgery and unauthorized use by managing only the information used for authenticity determination (counterfeit / unauthorized use prevention information) and the encryption key for its encryption, the management burden of the third party is reduced. Allows for lightening.

Next, according to the means according to claims 5 to 9 described in the above (5) to (9), the time stamp and the matters relating to the bill are printed on the document to be copied or its cover. , Matters related to these requests, license ID, administrative document disclosure reception number, time stamp, and
The information that is encrypted by the third party (certificate authority) to determine the authenticity (information for preventing forgery / unauthorized use) is printed as a two-dimensional code. Since the authenticity of the copied document can be discriminated even if the time stamp is falsified unless the information used for discriminating the authenticity is decoded, it is possible to prevent the forgery of the time stamp.

[0027] In addition, the two-dimensional coded information issued / printed by the third organization (certification body) includes items related to a request,
Also, the license ID, the administrative document disclosure reception number, the time stamp, and the information used by the third party (certificate authority) to determine the authenticity (counterfeit / unauthorized use prevention information) are encrypted. Since it is meaningless when used for copying other disclosed documents, as a result, it is possible to prevent unauthorized use of the time stamp.

Further, the third institution (certifying body) only has to manage the license ID, the information used for authenticity determination (forgery / unauthorized use prevention information) and the encryption key for encryption thereof. Therefore, the management burden of the third organization can be reduced.

According to the means of the tenth aspect described in (10) above, as the printing paper and the copying paper, when the copying is performed, the warning mark "invalid" or the hidden character "copy" appears in the copy. Copy protection and tampering prevention functions are performed by using tamper-proof paper such as special copy-prevention paper, a method in which the print toner and paper are firmly bound, and special recording paper with a special print fixing process that prevents overprinting. It is possible to improve.

According to the means of the eleventh aspect described in (11) above, the printed matter or the copied document after the second page is
Since printing or copying is performed with a time stamp watermark, it is possible to confirm that there are multiple pages and maintain commonality.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a printing system with a time stamp and a copying system having a tampering prevention function according to the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual block diagram of a printing system with a time stamp having the tampering prevention function described, in which 10 is a printed matter issuing organization that prints and issues various documents (such as securities and contracts). Issuing company), 30 is a third institution including a certification institution that authenticates the printed documents issued by the printed matter issuing institution 10. The space is structured to communicate via the communication network 20.

The printed matter issuing organization 10 includes, for example, a computer 14 as various document preparation devices used by the customer companies 10A and 10B, a modem 15, and a fire wall 1.
6, a digital multi-function peripheral 13 having at least a copying function, a printer function, and a FAX function, a printer 12, and a time stamp 11. In addition, in the third organization 30,
A time server 32 for supplying standard time, a time stamp issuing system 31, a modem 33 and a fire wall 34 are installed, and the communication line network 20 is composed of a public telephone line network 21 and an internet line network 22.

In the printing system shown in FIG. 1 described above, the computer 14 of the customer company 10A of the printed matter issuing organization 10 and the time stamp issuing system 31 of the third organization 30 are the modem 15, the modem 33, and the fire wall. 34 to communicate via the public telephone line network 21, and the computer 14 of the other customer company 10B and the time stamp issuing system 31 of the third organization 30 use the firewalls 16 and 34 to connect to the Internet. It is designed to communicate via the network 22.

Customer companies 10A and 10B are computers 1
Documents created using 4 are, for example, securities, commuter passes, travel tickets, various certificates, contracts, etc., deduction certificates, notices of contract contents (life insurance), reminder, billing guide , Balance certificate (financial), unregistered letter notice (financial),
Various notices (guides, thank-you notes, etc.), telephone line opening reports,
There are construction / installation completion reports, various local government guides, etc.

Further, according to the present invention, in order to enhance the function of preventing copying and tampering, a copy-preventing paper or a printing paper on which a hidden character such as a warning mark "invalid" or "copy" appears on the printing paper when the copy is made. Tamper-proof paper is used, such as a method in which the toner and paper are firmly connected, and special recording paper in a special print fixing process that prevents overlapping characters. In addition, in order to enhance the tamper-proof function, it is laminated with a transparent tamper-proof seal base material that cannot be restored if the seal is peeled off, or the printed part of the information printed with the two-dimensional code of the forgery / unauthorized use prevention information. It may be reinforced.

FIG. 2 is a block diagram for explaining the configuration of the document printing apparatus (client system) in the above-mentioned printed matter issuing organization 10. The document printing apparatus includes a CPU 14A as an arithmetic control unit, a communication means 14B, and data. The input unit 14C, the one-way function value calculation unit 14D, the two-dimensional coding unit 14E, the print information output unit 14G, the two-dimensional code reading unit 14F, the encryption unit 14H, and the information storage unit 14K are included.

The standard time stamp issuing system 31 (issuing device) of the third organization 30 is a CPU which is an arithmetic control unit.
31A, communication means 31B, data input means 31C, collation / verification means 31D, two-dimensional coding means 31E, two-dimensional code reading means 31X, standard time synchronizing means 31F for synchronizing in standard time, forgery prevention information generating means 31G, encryption means. 31H, an information storage section 31K, and a one-way function value calculation means 31Y.

In the printed matter issuing organization 10 of FIG.
U14A is a communication unit 14B, a data input unit 14C,
One-way function value calculation means 14D, two-dimensional coding means 1
4E, the print information output unit 14G, the two-dimensional code reading unit 14F, the encryption unit 14H, and the information storage unit 14K are controlled. That is, the communication unit 14B controls the time stamp issuing device 3 via the communication network 20 under the control of the CPU 14A.
The communication with the first communication means 31B is executed. The data input means 14C inputs various data to the issued document YA (see FIG. 5). The one-way function value calculation means 14D is the CPU 1.
A one-way function value (for example, hash value) is calculated based on the command of 4A. The two-dimensional coding means 14E converts the calculated one-way function value into a two-dimensional code. Encryption means 1
4H encrypts various kinds of information based on a command from the CPU 14A. The information storage unit 14K stores the encrypted data. The print information output unit 14G outputs the encrypted data.

The above-mentioned hash value is a value calculated by a hash function which is a one-way function. The one-way function is easy to convert and output a certain input, but outputs from the reverse direction. It is a function that is difficult or impossible to find. In a broad sense, a hash function is a function that maps a value from a large domain to a small domain, but a hash function used in cryptography or the like has unidirectionality and non-collision matching (the original The probability that the result will be the same although the value is different is low).

In the time stamp issuing device 31, C
The PU 31A includes a standard time synchronization unit 31F, a forgery prevention information generation unit 31G, an encryption unit 31H, an information storage unit 31K,
Communication means 31B, data input means 31C, collation / verification means 31D, two-dimensional coding means 31E, two-dimensional code reading means 31X, and one-way function value calculation means 31Y.
In addition to executing the control of, the required calculation is performed. The standard time synchronizing means 31F receives the standard time from the standard time transmitting organization, sets the standard time of the third organization 30, and sets the CPU.
The current standard time is added to the electronic mail from the computer 14 with reference to the standard time of the standard time synchronizing means 31F under the control of 31A.

FIG. 5 shows an example of a printed matter YA printed according to the present invention. In the printed matter YA, in addition to the print print data YA ', a two-dimensional code Y1 of the print print data YA' and , A two-dimensional code Y, which is a two-dimensional code of the encrypted forgery / unauthorized use information
2 and time stamp Y3, which is the print time,
When the issue number Y4 is printed and printed, and when the printed matter has a plurality of pages, the same printed time stamp YX as the above-mentioned time stamp Y3 is printed and printed on the printed matter YB ...

Next, the processing operation of the time stamped printing system having the tampering prevention function will be described with reference to the flow charts shown in FIGS.

FIG. 7 shows a procedure for producing a printed matter YA (FIG. 5) using the printing system of the present invention. First, as shown in step S1, the one-way function value calculation of the printed matter issuing organization 10 is performed. The means 14D calculates a one-way function value (for example, hash value) of print print data such as securities, commuter tickets, travel tickets, various certificates, contracts,
Then, the one-way function value and the license ID calculated as shown in step S2 are used for the communication means 14B and the communication network 2.
0 to the third party 30 to request a time stamp.

In the third organization 30, the collation / verification means 31D
Is sent as shown in step S3
The validity of D is checked, and if OK, the process proceeds to step S4 to generate a time stamp of the received time, then in step S5, the forgery prevention information generating means 31G generates the forgery / unauthorized use prevention information, and thereafter. , In step S6, the encryption unit 31H determines that the license ID or the one-way function value,
The time stamp and the forgery / unauthorized use prevention information are encrypted, and the encrypted information is two-dimensionally coded by the two-dimensional coding means 31E in step S7, and this two-dimensional code is communicated with the communication means 31B and the communication network. It transmits to the printed matter issuing organization 10 through 20.

In the printed matter issuing organization 10, after receiving the information such as the time stamp as in step S8, the process proceeds to step S9 to send the received information and print print data to the printer 12, and then to step S10. As shown in FIG. 5, the printer 12 prints the print data YA on the print data YA 'and the two-dimensional codes Y1, Y2, and
The data such as the time stamp Y3 and the issue number Y4 is printed, and the watermark print YX of the time stamp Y3 is inserted after the second page to finish the process.

FIG. 8 is a flow chart for explaining the processing procedure in the case of verifying the authenticity of the printed matter YA printed by printing each data as described above by the printing system of the present invention. There are a network communication means at the side window and a FAX communication means.

The verification by the network communication means uses the reading function of the digital multi-function peripheral 13 from the issued printed matter YA brought into the printed matter issuing organization 10 from the customer, and as shown in step S23, it is two-dimensional. The code reading means 14F reads the two-dimensional code Y1 of the print data to be printed from the printing, and then step S24.
Then, the one-way function value calculation means 14D calculates the one-way function value (eg, hash value) of the read data. In the next step S25, the two-dimensional code reading means 1
The two-dimensional code Y2 of the information obtained by encrypting the forgery / unauthorized use prevention information by 4F is read, and the process proceeds to the next step S26. In step S26, the communication unit 14B sends the license ID, the one-way function value, and the forgery / unauthorized use prevention data to the third organization 30 to request verification.

The third organization 30 first checks the validity of the license ID transmitted in step S15,
In the case of OK, the process proceeds to step S16, and the transmitted forgery / unauthorized use prevention information is decrypted with the secret key. Then, the process proceeds to step S17, where the decrypted data and the one-way function value transmitted. If the result of collation is OK, the process proceeds to step S18, and the authenticity of the above information used by the third organization 30 for determining authenticity is checked. If the check result is OK, the process advances to step S19 to send the verification result (non-tampering determination) to the printed matter issuing organization 10.

In the printed matter issuing organization 10, step S27 is performed.
As can be seen from Figure 3, the verification results sent from the third party are compared to determine the non-tampering property. That is, the time stamp sent and the calculated one-way function value are compared with the one-way function value calculated from the print print data read from the two-dimensional code Y1, and if OK (coincidence),
In step S29, the printed matter is reprinted and printed from the print print data read from the two-dimensional code Y1. Then, in step S30, the reprinted print and the issued printed matter YA are compared and collated, and if OK, verification is performed. To finish. Incidentally, the above steps S15, S16, S1
When it is determined to be NG (non-conforming) in each of 7, S18, S27, and S30, the verification of the printed matter is determined to be unacceptable (alteration / incorrectness).

On the other hand, in the case of verification by FAX communication, as shown in step S11 of FIG. 8, the issued printed matter YA brought into the printed matter issuing organization 10 is a digital multi-functional peripheral installed in the printed matter issuing organization 10. 13 is transmitted to the third organization 30 by FAX communication.

In the third organization 30 which has received, step S1
As shown in 2, the two-dimensional code Y1 of the print print data of the printed matter received by the FAX is read by the two-dimensional code reading means 31X, and then the process proceeds to step S13 to calculate the one-way function value from the read print print data. The means 31Y calculates a one-way function value (for example, a hash value), and in step S14, the two-dimensional code reading means 31X reads the two-dimensional code Y2 of the encrypted forgery / unauthorized use prevention information, Step S1 described above
Go to 5. The processing operations of steps S15 to S18 are the same as those described in the processing operation of the verification by the network communication described above, and thus the description thereof is omitted here.

If the authenticity check of the authenticity determination information is OK in step S18 after the processing of steps S15 to S18 has proceeded, the process proceeds to step S20 and the print print data read from the two-dimensional code Y1 is read. The printed matter is reprinted and printed, and then step S2
This reprinted print and verification result in 1 (non-tampering judgment)
Is transmitted to the printed matter issuing organization 10 by FAX communication, and finally, in step S22, the transmitted FAX is confirmed by the printed matter issuing organization 10 (client system), thereby ending the verification.

As described above, according to the printing system with the time stamp having the tampering prevention function according to the present invention described in FIGS. 1, 2 and 5 and FIGS. 7 and 8, the printed matter YA is obtained. Two two-dimensional code Y printed on
Since it is possible to prove that the electronic data is the electronic data of the printed matter by comparing the one-way function values of both 1, Y2 and the electronic data, the electronic data is the electronic data of the printed matter YA printed and issued. It can be easily proved.

Next, an embodiment of a copying system with a time stamp having a tampering prevention function according to the embodiment of the present invention will be described based on the description of FIGS. 3, 4, 9, and 10.

FIG. 3 is a conceptual explanatory block diagram of the present invention. In the figure, 40 is, for example, an administrative institution 40A, 4
A copying agency for documents, such as a 0B information disclosure window, 30 is a third organization including a certification body that certifies copying documents issued by the copying agency 40, and a public telephone line is provided between the copying agency 40 and the third organization 30. It is structured to communicate via the communication line network 20 using the network 21 or the Internet line network 22.

The copying agency 40 includes, for example, the administrative agency 40.
A computer 42 for creating and managing various documents used at the information disclosure windows of A and 40B, a modem 43 and a fire wall 44, at least a copy and a printer, and a F
A digital multi-function peripheral 41 having the functions of AX and scanner is installed. Further, a time server 32 for supplying standard time, a time system issuing system 31, a modem 33 and a fire wall 34 are installed in the third organization 30, and the connection between the copying organization 40 and the third organization 30 is as described above. The communication line network 20 including the public telephone line network 21 and the Internet line network 22 is tangentially connected to the illustrated state.

As a document to be copied by using the digital multi-function peripheral 41 at the counter of each administrative institution 40A, 40B, for example, there is an administrative document disclosed according to an administrative document disclosure request based on the Information Disclosure Law, and FIG. It is an example of a copy document ZA to be copied based on a request.

The copy sheet set in the digital multi-function peripheral 41 and used for copying is constructed so that when the copy sheet is copied again, a hidden mark such as a warning mark or "invalid" or "copy" appears in the copy sheet. Paper is used. Further, as shown in FIG. 6, the information Z2 including the administrative document disclosure document name, the requester name, the contact information, the copying date and time, and the information disclosure window is printed on the cover of the copy document ZA, Furthermore, a license ID, an administrative document disclosure reception number, or a two-dimensional code Z1 that is a two-dimensional code of information obtained by encrypting a time stamp or information that a third party determines authenticity (counterfeit / unauthorized use prevention information). Is printed. Furthermore, 2
The disclosure document ZB on and after the page is copied with the time stamp watermark ZX.

FIG. 4 is a block diagram of the above-mentioned copying system. The copying engine 40 includes a CPU 42A which is an arithmetic control unit, a communication unit 42B, and a data input unit 4.
2C, a two-dimensional code reading unit 42D, a print information output unit 42G, and an information storage unit 42K. The standard time stamp issuing system 31 (issuing device) of the third organization 30 has a configuration substantially similar to that used in the printing system shown in FIG.
The same means will be denoted by the same reference numerals, and the description thereof will be omitted.

Next, the processing operation of the time stamped copying system having the tampering prevention function will be described with reference to FIGS.
It will be described according to the flowchart shown in FIG.

FIG. 9 is a flow chart for explaining the processing procedure when the window of the administrative institution (copying institution 40) copies the disclosed document based on the disclosure request. In copying, this is seen in step S31. First, copy agency 40
At this point, the name of the disclosed document, the name of the claimant and their contact information, etc. are input using the data input means 42C of the computer 42, and the process proceeds to step S32. In step S32, the license ID and the disclosure document reception number are transmitted to the third institution 30 via the communication means 42B to issue a time stamp issuance request.

The third institution 30 checks the validity of the received license ID as seen in step S33, and if OK, proceeds to the next step S34 to generate a time stamp of the received time, and then, Step S3
In step 5, forgery prevention information is generated, and the process proceeds to step S36.
In step S36, the license ID, the disclosed document reception number, the time stamp, and the forgery prevention information are encrypted using the encryption means 31H, and then step S37.
Then, the two-dimensional encoding means 31E two-dimensionally encodes the encrypted information and transmits it to the copying institution 40.

When the copying agency 40 receives the information from the third agency 30 as shown in step S38,
In step S39, the received various information, the disclosure document name, the requester's name and the contact information, etc. are transmitted to the digital multi-function peripheral 41 installed at the window. Digital multifunction machine 4
1 stores the received information in a memory (not shown) in step S41, prints a cover sheet including the two-dimensional code Z1 as shown in FIG. 6 in step S42, and displays the disclosed document in step S43. Copy and finish the process. In addition, to make a copy of the billing administration document attached to the cover,
Watermark the time stamp ZX.

FIG. 10 is a flow chart for explaining the processing procedure for verifying the authenticity of the copy document ZA issued by the copying agency 40 by the copying system according to the present invention. There are two types, one is by network communication in the above, and the other is by fax communication means.

In the usual case of verification by network communication, first, the issued copy document ZA brought in by the claimant or the like
Scanner with the digital multi-function peripheral 41, and step S5
As shown in 2, the two-dimensional code reading means 42D reads the two-dimensional code Z1 of the information obtained by encrypting the forgery / unauthorized use prevention information, and then, in step S53, transmits the respective read information to the third organization 30. Then, the verification request is made.

On the other hand, in the verification by the FAX communication means, as shown in step S44, the copying document ZA is FAX-transmitted to the third organization 30 using the digital multi-function peripheral 41 in the copying organization 40, and then in step S45. This is performed by reading the two-dimensional code Z1 of the information obtained by encrypting the forgery / unauthorized use prevention information from the FAX document in the third organization 30.

When the verification request in the above step S53 or the reading of the two-dimensional code Z1 in the step S45 is performed, the third institution 30 checks the validity of the license ID in step S46, and the forgery / unauthorized use prevention data is read. After each processing of step S47 of decryption with a secret key, step S48 of collating the decrypted data with the received administrative document disclosure reception number and time stamp, and step S49 of checking the authenticity of the authenticity determination information, O at S49
In the case of K, the verification result (non-tampering judgment) is transmitted to the copying institution 40 in step S50, and steps S51 and S5 are executed.
As shown in FIG. 4, the processing is completed by receiving this verification result at the copying agency 40. The above step S4
When it is determined to be NG in each of S6, S48, and S49, the verification result that there is tampering is sent to the copying institution 40.

[0068]

As described above, according to the printing system and the copying system with the time stamp having the tampering prevention function according to the present invention, the authenticity of various printed and issued documents and the authenticity of various copied and issued documents can be improved. Since it is possible to properly verify the property, it is possible to reliably prevent forgery and unauthorized use of printed documents and copied documents.
It is suitable for use in printing securities, various certificates, various important documents such as contracts, and copying various administrative documents based on a request for disclosure of administrative documents.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a printing system with a time stamp having a tampering prevention function according to an embodiment of the present invention.

FIG. 2 is a block diagram of the main configuration of the printing system shown in FIG.

FIG. 3 is a schematic configuration diagram of a time stamped copying system having a tampering prevention function according to an embodiment of the present invention.

FIG. 4 is a block diagram of a main configuration of the copying system shown in FIG.

5 is an explanatory diagram showing an example of a printed document issued by the printing system shown in FIGS. 1 and 2. FIG.

6 is an explanatory diagram showing an example of a copied document issued by the copying system shown in FIGS. 3 and 4. FIG.

FIG. 7 is a flowchart illustrating a processing procedure for creating a print document by the printing system illustrated in FIGS. 1 and 2.

FIG. 8 is a flowchart illustrating a verification processing procedure performed by the printing system illustrated in FIGS. 1 and 2.

FIG. 9 is a flowchart illustrating a processing procedure for creating a copied document by the copying system shown in FIGS. 3 and 4.

FIG. 10 is a flowchart illustrating a verification processing procedure by the copying system shown in FIGS. 3 and 4;

[Explanation of symbols]

10 Printed matter issuing organizations 20 communication network 30 Third Organization 31 Time stamp issuing system 32 time server 40 Copier 41 Digital multifunction device YA printed documents ZA copy document Y1, Y2, Z1 two-dimensional code Y3 time stamp

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B42D 15/10 501 B42D 15/10 531B 5C086 531 541A 5J104 541 G06F 3/12 A G06F 3/12 K G07B 1/00 B G07B 1/00 E G08B 21/00 A G08B 21/00 G09C 1/00 640Z G09C 1/00 640 H04L 9/00 675D H04L 9/32 B41J 29/00 Z F Term (Reference) 2C005 HA02 HB01 HB10 HB10 HB10 HB10 HB10 HB10 HB10 HB10 HB10 HB10 JB33 JB40 LA32 LB32 LB38 LB53 LB60 2C061 AP04 CL10 JJ02 2C187 AD04 AE07 BF34 GD02 GD06 3E026 BA10 5B021 AA01 BB02 5C086 AA60 BA30 CA28 CB37 DA08 DA14 DA33 EA41 EA45 FA11 5J104 A01 MA11

Claims (11)

[Claims] 1. A time-stamped printing system for time-stamping the issuance time when printing and printing various documents, wherein the printed document is printed out when printed. Calculated from the time stamp information generated from standard time, the two-dimensional code that is the two-dimensional code of the print print data, and the print print data provided by the third organization including the certification body or a system that cooperates with the third organization. The one-way function value and the two-dimensional code obtained by encrypting the information used by the third organization or its cooperation system for determining the authenticity, and the two-dimensional code of the encrypted information is printed. A printing system with a time stamp having a tampering prevention function characterized by being configured to 2. When printing out each print document, the client system, which is the issuer of the document, sends the one-way function value calculated from the print print data to the third organization or its cooperation system and the license. When information such as ID is transmitted and issuance of a time stamp generated from standard time is requested, the third party or its cooperation system checks the validity of the license ID, and if valid, it is based on the received standard time. The time stamp information is generated and the print print data is two-dimensionally encoded. Further, the license ID and the time stamp information, and the one-way function value calculated from the print print data, and the third organization or its The forgery / unauthorized use prevention information used by the cooperative system to determine the authenticity is encrypted, respectively, and
The two-dimensional coding of the encrypted information is performed, and these two two-dimensional codes and the time stamp information are transmitted to the client system that issued the document, and the two received at the client system. A two-dimensional code and time stamp information are printed on the document to be printed out.
A time stamped printing system with the tampering prevention function described in. 3. A reading means for reading the two two-dimensional codes printed on the issued document brought into the issuer to a client system of the issuer of the printed document, and one read two-dimensional code A one-way function value calculation means for calculating the one-way function value from the one-way function value, the calculated one-way function value, and the counterfeit / unauthorized use prevention information and license ID constituting the other read two-dimensional code. Is equipped with a communication means for transmitting verification to the third organization or its cooperation system and requesting verification, while the third organization or its cooperation system is provided with a verification means for checking the validity of the license ID sent. , Forgery / unauthorized use prevention information is decrypted with a secret key, and the decrypted data is compared with the sent one-way function value,
The tampering prevention function according to claim 1 or 2, further comprising: a collation / verification unit for checking the authenticity of the authenticity determination information, and a communication unit for transmitting the verification result to the client system of the issuing source. Printing system with time stamp. 4. When the issued document is sent by fax communication from the publisher of the print document to the third organization or its cooperation system, the two fax documents are sent from the sent fax document. Reading means for reading the dimension code, one-way function value calculating means for calculating the one-way function value from the read two-dimensional code, and collation for checking the validity of the license ID read from the two-dimensional code. The means and the forgery / unauthorized use prevention information also read from the two-dimensional code are decrypted with a secret key, and the decrypted data is compared with the one-way function value calculated above to verify the authenticity of the authenticity determination information. The verification / verification means for checking, the printing means for reprinting the document from the read print print data, and the result of the above verification and the reprinted printed document by FAX communication with the issuer's class. 3. A printing system with a time stamp having a tampering prevention function according to claim 1 or 2, further comprising: a transmitting unit for transmitting to the client system. 5. When copying and issuing various documents,
A time-stamped copying system that issues time stamps of the copying time. When copying the above-mentioned document, the time stamp information generated from standard time, this time stamp information and anti-counterfeiting information are encrypted, and encrypted. A tampering prevention function characterized in that a two-dimensional code obtained by further converting the above-mentioned information into a two-dimensional code is generated, and the time stamp information and the two-dimensional code are printed on a document or a cover thereof to be issued. Copy system with time stamp equipped with. 6. When copying each document, the client system, which is the copy source of the document, sends a license ID, a copy acceptance number, etc. to a third institution including a certification institution or a system in cooperation with the third institution. When the identification information is transmitted and a time stamp issuance is requested, the third party or its cooperation system checks the validity of the license ID, and if it is valid, generates the time stamp information based on the received standard time. , Generation of forgery / unauthorized use prevention information, encryption of the license ID, copy acceptance number, time stamp information and forgery / unauthorized use prevention information, and two-dimensional encoding of each encrypted information. Send the two-dimensional code to the digital copying machine of the above copy source and print the above two-dimensional code and time stamp on the document to be copied or its cover. 6. The time stamped copying system having the tampering prevention function according to claim 5, wherein the copying system has a tampering prevention function. 7. A document to be copied is a disclosure document based on the Information Disclosure Law, and a client system provided at an information disclosure window of an administrative agency identifies a license ID, a copy acceptance number, etc. to a third organization or its cooperation system. When sending information and requesting the issuance of a time stamp, individual information such as the name of the disclosed document, the name of the requester, and the contact information is also entered, while the information disclosure is made available from the third party or its collaborative system. When the two-dimensional code and the time stamp information are transmitted to the client system of the counter, the above individual information is also transmitted to the digital multi-function peripheral of the information disclosure counter, and each of the above is displayed on the cover of the document to be copied. The time stamp with the tampering prevention function according to claim 5 or 6, wherein the individual information, the two-dimensional code, and the time stamp are printed. Copy system with tamping. 8. The counterfeiting / unauthorized use prevention information, the license ID, and the time from the copied document brought to the copy source or the information disclosure window to the client system provided at the copy source or the information disclosure window of the document. One is provided with a reading means for reading the two-dimensional code of the stamp information and the information obtained by encrypting the copy acceptance number, and a communication means for transmitting the read two-dimensional code information to the third organization or its cooperation system to request verification. , The above-mentioned third organization or its cooperation system decrypts the counterfeiting / unauthorized use prevention information with the private key and the collation means for checking the validity of the license ID sent to it, and sends it to this combined data. The collation / verification means for checking the authenticity of the authenticity determination information by collating with the above copy acceptance number and the time stamp information, and the verification result 8. A copying system with a time stamp having a tampering prevention function according to claim 5, 6 or 7, further comprising communication means for transmitting to a copy source or a client system of an information disclosure window. 9. When a copied document is sent by fax communication from the information disclosure window of the copying source of the copied document or the administrative agency to the third organization or its cooperation system. A reading means for reading the two-dimensional code of the forgery / unauthorized use prevention information, the license ID, the time stamp information, and the information obtained by encrypting the copy acceptance number from the FAX document; and a collating means for checking the validity of the read license ID, Collation / verification means for decoding the read forgery / unauthorized use prevention information with a private key, and checking the authenticity of the genuine / counterfeit judgment information by comparing the decoded data with the read time stamp information and copy acceptance number. 7. The tampering according to claim 5 or 6, further comprising: communication means for transmitting the verification result to the copy source or the information disclosure window by FAX communication. Timestamped copy system having a prevention function. 10. As a printing or copying sheet for printing the two-dimensionally encoded forgery / unauthorized use prevention information, when these printed or copied sheets are set in a copying machine and copied. Copy protection paper that displays warning marks and copy protection characters such as invalid or copy on the copy,
A method in which a printing toner and a paper are firmly connected to each other, or forgery prevention paper such as a special recording paper in a special print fixing process that prevents overprinting is used. A printing system or a copying system with a time stamp having the tampering prevention function according to 3, 4, 5, 6, 7, 8 or 9. 11. When the document to be print-issued or the document to be copy-issued has a plurality of pages, the watermark of the time stamp is put on a sheet of two or more pages for printing or copying. Claims 1, 2,
A printing system or a copying system with a time stamp having the tampering prevention function according to 3, 4, 5, 6, 7, 8, 9 or 10.