JPH08297743A - Verification information generating device for printed matter and verification device for printed matter - Google Patents

Abstract

PURPOSE: To prevent alteration of printed sentences by providing a dependent information conversion means and a dependent information print means which prints converted dependent information on a printed matter. CONSTITUTION: Information of the printed matter is read by an information input means 12 and is converted to electronic information 14 by an information conversion means 13. Dependent information dependent upon this electronic information is generated by a generation means 15 and is converted to a form of a bar code or the like by a conversion means 17 and is printed as verification information on the printed matter. A verification device generates electronic information and dependent information from the printed matter and restores dependent information printed on the printed matter and collates them. In the case of noncoincidence, alteration is decided. Consequently, the whole of the printed matter is protected, and alteration is easily detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a verification information generating device and a verification device for printed matter, and more particularly to a device for preventing falsification of printed matter such as receipts, prescriptions and various certificates.

[0002]

2. Description of the Related Art FIG. 18 shows, for example, JP-A-4-21886.
It is a block diagram of the conventional anti-theft device of the electronic seal disclosed by the gazette No. 8. In the figure, reference numeral 1 denotes a marking means for managing an operation when a stamp image is stamped on an electronic document, and 2 has functions of displaying document entity data and a stamp image, printing, and importing the stamp image into the document. Document data handling means 3, print request means 3 for specializing only a stamp image stamped through formal stamping processing, 4 password file, 5 terminal device, 6 document management database, 7 document data file, Reference numeral 8 is a seal image file.

Next, the operation of the conventional anti-theft device will be described with reference to FIG. The marking means 1 checks the consistency of the password input by the user, and if the passwords match, gives a marking instruction to the document data handling means 2. The document data handling means 2 takes in the image information of the stamp image file 8 into the document being displayed.
After the document is displayed on the screen (T1), if a print request for this document is made, the print request means 3 is activated (T1).
2) The document management database 6 is read, and the corresponding actual document data file 7 and stamp image file 8 are read. Then, the stamp image file 8 is specially processed using the special processing data file 11 to create a specially processed stamp image (T3). The specially processed stamp image file 8 is placed in the work area for printing while being attached to the actual document data file 7, and is written out as a copy file (T4). Thereafter, printing is performed based on the data of the copied actual document data file 7 and the specially processed seal image file 8 (T
5). As a method of specially processing the stamp image, see Fig. 2.
The pattern shown in 0 is used to clearly distinguish it from the original seal image.

[0004]

Since the conventional electronic stamp theft prevention device is configured as described above, when printing the electronically stamped document, the stamp portion is specially processed. The entire output document is not protected at all, and even if it is tampered with, such as adding some characters to other parts of the paper after output than the stamp part, the stamp part will not be tampered, so it will be detected at all There was a problem that it could not be done.

There is also a possibility that a false stamped document can be easily created even if the stamp portion that has been specially processed is subjected to special processing using some other similar device.

Further, since it is necessary to specially process and print the seal stamp, it is necessary to prepare a special printing device for that purpose, and there is a problem that a conventional printing device which has been conventionally used cannot be used.

The present invention has been made in order to solve the above-mentioned problems, protects an entire document from being an approved document, and can detect even falsification. It is an object of the present invention to provide a verification information creation device and a verification device for a printed matter that can be printed.

It is another object of the present invention to provide a printed matter verification information creation apparatus and a printed matter verification apparatus that can be realized without using a special apparatus.

[0009]

In order to achieve the above object, the present invention depends on an information input means for reading information of a printed matter, an information converting means for converting the read information into electronic information, and an electronic information relying on the electronic information. Dependent information creating means for creating dependent information, dependent information converting means for converting the dependent information into a print format, and dependent information printing means for printing the converted dependent information on the printed matter. .

Here, for example, a bar code format is used as the print format.

In order to achieve the above object, the present invention provides information input means for reading information of printed matter, information converting means for converting the read information into electronic information, and dependency information depending on the electronic information. Dependency information creating means for creating, dependency information inputting means for reading the dependency information of the print format printed on the printed matter, and dependency information reverse converting means for inversely converting the read dependency information into the dependency information before the print format conversion. And a verification unit for verifying the printed matter by collating the dependence information created by the dependence information creation unit with the dependence information obtained by the inverse conversion by the dependence information inverse conversion unit.

In order to achieve the above object, the present invention provides information input means for reading information of a printed matter, information conversion means for converting the read information into electronic information, and dependency information depending on the electronic information. It is characterized by having dependency information generating means for generating and dependency information storing means for storing the dependency information.

Further, in order to achieve the above object, the present invention provides an information input means for reading information of a printed matter, an information converting means for converting the read information into electronic information, and dependency information depending on the electronic information. It is characterized in that it has a dependency information creating means for creating and a verifying means for verifying the printed matter by collating the created dependency information with corresponding dependency information stored in advance in the dependency information storing means.

Further, in order to achieve the above object, the present invention provides public information creating means for creating public information from secret information of a signer, registration means for registering the public information in a database, and information of printed matter. Information inputting means for reading, information converting means for converting the read information into information to be signed, signature information creating means for creating signature information for the information to be signed using the secret information, and the signature information And signature information storage means for storing

Further, in order to achieve the above object, the present invention comprises an information input means for reading information on a printed matter, and an information converting means for converting the read information into information to be signed.
By signature information input means for extracting the corresponding signature information from the signature information storage means, search means for extracting public information registered in advance in the database, and by collating the signature target information with the signature information and the public information. It has a verification means which verifies the printed matter.

[0016]

In the printed matter verification information creating apparatus of the present invention, dependency information is created for the printed matter information converted into electronic information, and the dependence information is printed on the printed matter. Therefore, in the printed matter verification apparatus of the present invention, by checking the dependency information created from the printed matter and the dependency information created and printed by the verification information creating apparatus, it is possible to easily detect whether the printed matter has been tampered with. You can Since the dependency information can be created electronically, no special printing device is required.

If the bar code format is used as the printing format, the verification information can be printed on the printed matter inexpensively and reliably.

Further, the printed matter verification information creating apparatus of the present invention creates dependency information for the printed matter information converted into electronic information and stores the dependent information. Therefore, the printed matter verification apparatus of the present invention can easily detect whether or not the printed matter has been tampered with by checking the dependency information created from the printed matter and the previously stored dependency information. Since the dependency information is not printed on the printed matter but is stored separately in a storage device or the like, no special printing device is required.

Further, in the printed matter verification information creating apparatus of the present invention, a signature is applied to the printed matter by skillfully utilizing a conventionally known digital signature using public key encryption.
That is, public information is created from the secret information of the signer,
Signature information is created and stored using confidential information for the printed matter. Therefore, in the printed matter verification apparatus of the present invention, the signer can be verified using the public information, and can easily be detected if someone tampered with either the printed matter or the signature.

[0020]

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

Example 1. FIG. 1 shows the configuration of a printed matter verification information creating apparatus in this embodiment, and FIG. 2 shows the configuration of a printed matter verifying apparatus in this embodiment. In FIG. 1, reference numeral 12 is an information input means, which is a device for reading printed materials such as handwritten or printed receipts, prescriptions, and various certificates. Reference numeral 13 denotes an information conversion means, which converts the information of the printed matter input by the information input means 12 into electronic information 1
Convert to 4. The information input unit 12 and the information conversion unit 13 can be configured by a commercially available scanner or OCR device. Reference numeral 15 is a dependency information creating means for creating the dependency information 16 from the electronic information 14. The dependency information 16 is specifically information compressed using a hash function or the like. 17
Is a dependency information conversion means, which converts the dependency information 16 into a printable format. Reference numeral 18 is a dependence information printing means, which prints the dependence information as verification information on a printed matter. The dependency information creating unit 15 and the dependency information converting unit 17 are configured by a computer, and the dependency information printing unit 18 can use an ordinary printer or the like.

On the other hand, in FIG. 2, the information input means 12,
Information conversion means 13, electronic information 14, dependency information creation means 1
5 and the dependency information 16 are the same as the configuration of FIG. Also, 1
Reference numeral 9 is a dependency information input means for reading the dependency information printed on the printed matter by the verification information creating apparatus of FIG. 1, which is composed of a scanner or the like. Reference numeral 20 is a dependency information inverse conversion means for restoring the dependency information read by the dependency information input means 19 to the original dependency information 21 before the print format conversion. Reference numeral 22 is a verification means for verifying the dependence information 16 created by the dependence information creation means 15 and the restoration dependence information 21 restored from printing by collation. The dependency information creating unit 15, the dependency information reverse converting unit 20, and the verifying unit 22 are configured by computers.

The configuration of this embodiment is as described above.
The operation will be described with reference to the flowchart of FIG. FIG. 3 is a flowchart in which the printed matter verification information creation apparatus shown in FIG. 1 creates dependency information from printed matter information,
FIG. 4 is a flow chart for the printed matter verification device shown in FIG. 2 to verify whether or not the printed matter has been tampered with.

In FIG. 3, work is started in step 23. In step 24, read the information from the printed matter,
In step 25, the electronic information 14 is converted. Next, in step 26, the dependency information 16 is created using the dependency information creating means 15. Then, in step 27, the dependency information conversion means 1
7 is used to convert the dependency information 16 into a print format. As the print format, for example, a barcode format as shown in FIG. 5 can be used. At step 28, the dependency information printing means 18 prints the dependency information such as the barcode format on the printed matter, and at step 29, the work is ended. When the dependency information is in the barcode format, it can be printed at any position on the printed matter, but when the printed matter is a drawing, it is preferable to print it in the description field of the drawing as shown in FIG. Let's do it.

On the other hand, in FIG. 4, the work is started in step 30. Steps 30 to 33 are the same as steps 23 to 26 in FIG. That is, information is read from the printed matter in step 31, converted into electronic information in step 32, and step 33
The dependency information is created using the dependency information creating means 15.
Then, in step 34, the printed dependency information 16 is read by using the dependency information input means 19, and in step 35, it is converted into restoration dependency information in the form of an electronic file by using the dependency information reverse conversion means 20. Next, in step 36, the dependency information 16 created by using the dependency information creating means 15 and the restoration dependency information 21 are collated and verified. As a result, if they are the same, it is determined in step 37 that they have not been tampered with, and normally ends in step 38, and if they are not the same, it is determined that they have been tampered with in step 37 and abnormally ends in step 39.

FIG. 7 is a diagram showing an example of the information input means 12 for reading information from the printed matter and the information conversion means 13 for converting the information into electronic information 14 in this embodiment. Information input as dot data from scanner devices, etc.
If the grid is divided into (X, Y) finely, the upper left square is the origin (1, 1), the horizontal axis is the X coordinate, and the vertical axis is the Y coordinate, then the corresponding segment is the print area or not. When 0/1 digitization is performed, (4, 1) = 0, (4, 2) = 0,
The data (4, 3) = 0, (4, 4) = 0, (4, 5) = 1 is read. File this data,
By using the electronic information 14, the electronic information 14 of this embodiment is generated. It should be noted that the electronic information 14 can be generated by converting the color of the corresponding area into digital data.

As described above, in the present embodiment, the electronic information depending on the information on the printed matter is printed on the printed matter as the verification information in the form of the bar code or the like. Therefore, the electronic information created from the printed matter and the printed electronic information are printed. It is possible to easily detect the presence or absence of tampering only by collating, and it is possible to eliminate the need for a special printing device as in the past.

Embodiment 2 FIG. FIG. 8 shows the configuration of the printed matter verification information creation apparatus of this embodiment, and FIG. 9 shows the configuration of the printed matter verification apparatus of this embodiment. In FIG. 8, the information input unit 12, the information conversion unit 13, the electronic information 14, the dependency information creation unit 15, and the dependency information 16 are the same as those in the configuration of FIG. Further, reference numeral 40 is a dependency information storage means composed of a computer, which stores the dependency information 16 as verification information in a floppy disk or the like.

On the other hand, in FIG. 9, the information input means 12,
Information conversion means 13, electronic information 14, dependency information creation means 1
5 and the dependency information 16 are the same as those in the configuration of FIG. Also, 4
Reference numeral 1 is a dependence information reading means constituted by a computer, which reads the dependence information stored in a floppy disk or the like and uses it as restoration dependence information 21. Reference numeral 22 is a verification means, which verifies the presence or absence of tampering by collating the dependency information 16 and the restoration dependency information 21.

10 and 11 show a processing flowchart of the present embodiment. FIG. 10 shows the processing of the printed matter verification information creating apparatus shown in FIG. 8, and FIG. 11 shows the printed matter verification shown in FIG. This is the processing of the device.

In FIG. 10, work is started in step 42. In step 43, read the information from the printed matter,
In step 44, electronic information 14 is read using a scanner or OCR.
Convert to. In step 45, the dependency information is created using the dependency information creating means 15. The dependency information is, for example, information obtained by compressing the electronic information 14 using a hash function or the like. In step 46, the dependency information 1 is used by using the dependency information storage means 40.
Save 6 to a floppy disk.

On the other hand, in FIG. 11, the work is started in step 48. In step 49, information is read from the printed matter, and in step 50, electronic information 1 is read using a scanner or the like.
Convert to 4. In step 51, the dependency information 16 is created using the dependency information creating means 15. Next, in step 52, the dependency information reading means 41 is used to read the dependency information stored in the floppy disk or the like, and the restoration dependency information 21 is obtained. Then, in step 53, the dependency information 16 created by using the dependency information creating means 15 is collated with the restoration dependency information 21, and if it is determined in step 54 that they are the same, the process normally ends in step 55, and step 54 If it is determined that they are not the same, it is determined that there is tampering and the process ends abnormally in step 56. As described above, in the present embodiment, the electronic information depending on the information of the printed matter is stored in the storage medium such as the floppy disk as the verification information, so only the electronic information created from the printed matter and the stored electronic information are collated. Therefore, it is possible to easily detect the presence or absence of tampering, and it is possible to eliminate the need for a special printing device as in the past.

Although the dependency information is stored in the floppy disk in this embodiment, any other storage medium such as a hard disk, a magneto-optical disk, or a semiconductor memory can be used.

Example 3. In each of the above-described embodiments, the presence or absence of falsification of the content of the printed matter is detected. However, in the present embodiment, not only the presence or absence of falsification of the printed matter is detected, but digital printing using a public key cryptosystem is performed on the printed matter. A case of making a signature and verifying the signature will be described.

FIG. 12 shows the configuration of the public information creation device of this embodiment. In the figure, reference numeral 57 denotes secret information (secret key) such as a password assigned to each user, and public information (public key) 59 is created from this secret information using public information creating means 58. The created public information 59 is registered in the database 61 by the registration means 60.

Here, the public key cryptosystem will be briefly described. In this method, a private key and a public key are provided for each user, and anyone can use the public key. Therefore, when many people communicate, the number of keys can be significantly reduced. In the case of the private key cryptosystem, the same private key is used for encryption and decryption, so it is possible for the recipient to falsify the signature text. Since the key and the decryption key are different, there is an advantage that such tampering can be prevented. In this embodiment, a digital signature is given to a printed matter by using this public key cryptosystem. For details on public key cryptography, refer to, for example, "Introduction to Cryptography" (Eiji Okamoto, Kyoritsu Shuppan Co., Ltd.) and "Computer Security" (Norihisa Doi, Kenji Koyama, Kyoritsu Shuppan Co., Ltd.). I want to.

FIG. 13 shows the configuration of the printed matter verification information creating apparatus of this embodiment. In the figure, an information input means 12 is a device for reading printed materials such as handwritten or printed receipts, prescriptions, and various certificates, and the information converting means 1
In 3, the information 62 is converted into the signature target information 62. Reference numeral 63 is a signature information creating means for creating the signature information 64 by inputting secret information 57 such as a password to the signature target information 62. The signature information 64 is digital signature information using the public key cryptosystem. Then, the created signature information 64
Is stored in a floppy disk or the like by the signature information storage means 65. The signature information creation means 63 and the signature information storage means 65 are composed of computers.

FIG. 14 shows the configuration of the printed matter verification apparatus of this embodiment. In the figure, information input means 12,
The information converting means 13 is the same as that shown in FIG. 13, and creates the signed information 62 from the printed matter. Reference numeral 66 is a signature information input means for reading out the signature information stored in the floppy disk or the like. Reference numeral 67 is a search means for extracting the public information 59 in the database 61, and 68 is a verification means for verifying the presence or absence of falsification from the signature target information 62, the signature information 64, and the public information 59. The signature information input means 6
6, the search means 67 and the verification means 68 are constituted by a computer.

The configuration of the present embodiment is as described above, and its processing will be described below with reference to the flow charts of FIGS.

FIG. 15 shows a database 61 of public information 59.
This is a registration process to the, and the work is started in step 69, and the signer inputs secret information 57 such as a password in step 70. At step 71, the public information 59 is generated from the secret information 57 by the public information creating means 58. Step 7
In step 2, the registration means 60 registers the data in the database 61, and in step 73, the work ends.

FIG. 16 shows a process of creating and storing signature information. The work is started in step 74, the information is read from the printed matter in step 75, and converted into the signature target information 62 in step 76. In step 77, the same secret information 57 as that input in step 70 is input. Next, in step 78, the signature information 64 is created from the signature target information 62 and the secret information 57 using the signature information creating means 63. Then, in step 79, the signature information storage means 65 is used to store the signature information 64 in a floppy disk or the like, and in step 80, the operation ends.

FIG. 17 shows a process for verifying the presence or absence of falsification. The work is started in step 81, the information is read from the printed matter in step 82, and converted into the signature target information 62 in step 83. Then, in step 84, the signature information 64 stored in the floppy disk or the like is read out using the signature information input means 66, and in step 85 the retrieval means 67.
The database 61 is searched by and the public information 59 is retrieved in step 86. Next, in step 87, the verification means 6
8, the signature target information 62, the stored signature information 64, and the public information 59 are used to verify the presence or absence of falsification. That is, the input signature information 64 is decrypted by using the public information 59 to restore the signed information, and the created signed information 62 is collated. As a result of the collation, when it is determined that they are the same in step 88, the process normally ends in step 89, and when it is determined that they are not the same in step 88,
In step 90, the process ends abnormally. If a person other than the user who should originally sign the signature, the public information cannot be correctly decrypted, and therefore the information to be signed does not match.
It is possible to easily detect falsification of the signature.

As described above, in each of the embodiments, handwriting and receipt are described as an example of the printed matter, but it goes without saying that the invention can be applied to not only character information but also image data.

Further, the printed matter verification information creating apparatus and the printed matter verifying apparatus described in each of the embodiments can be used alone or mounted on a FAX machine or a copying machine.

[0045]

As described above, according to the present invention, since the entire printed text is protected, it is possible to reliably prevent falsification after printing. That is, even if the third party tampers, it is possible to easily detect the presence or absence of the tampering, so that it is possible to give a sufficient incentive to prevent the tampering.

Further, according to the present invention, since the verification information for preventing falsification can be created without using a special printing device, the compatibility with the existing device is excellent and the system can be constructed at a low cost.

Further, according to the present invention, it is possible to sign the information that has already been printed, and it is possible to reliably detect the presence or absence of falsification of this signature.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a printed matter verification information creating apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a printed matter verification apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart of a printed matter verification information creation process according to the first embodiment of the present invention.

FIG. 4 is a flowchart of printed matter verification processing according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of verification information according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of a verification information print part according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram of electronic information conversion processing according to the first embodiment of this invention.

FIG. 8 is a configuration diagram of a printed matter verification information creating apparatus according to a second embodiment of the present invention.

FIG. 9 is a configuration diagram of a printed matter verification apparatus according to a second embodiment of the present invention.

FIG. 10 is a flowchart of a printed matter verification information creation process according to the second embodiment of the present invention.

FIG. 11 is a flowchart of printed matter verification processing according to the second embodiment of the present invention.

FIG. 12 is a configuration diagram of a public information creation device according to a third embodiment of the present invention.

FIG. 13 is a configuration diagram of a printed matter verification information creating apparatus according to a third embodiment of the present invention.

FIG. 14 is a configuration diagram of a printed matter verification apparatus according to a third embodiment of the present invention.

FIG. 15 is a flowchart of public information creation processing according to the third embodiment of this invention.

FIG. 16 is a flowchart of signature information storage processing according to the third embodiment of this invention.

FIG. 17 is a flowchart of signature information verification processing according to the third embodiment of this invention.

FIG. 18 is a configuration diagram of a conventional anti-theft device for an electronic seal.

FIG. 19 is a print processing flowchart of a conventional apparatus.

FIG. 20 is an explanatory diagram of special processing using a mask pattern of a conventional apparatus.

[Explanation of symbols]

1 marking means, 2 text data handling means, 3
Print request means, 4 password file, 5 terminal device, 6 document management database, 7 actual document data file, 8 stamp image file, 9 printing work area, 10 printer, 11 special processing data file, 12 information input means, 13 Information conversion means, 14
Electronic information, 15 Dependent information creating means, 16 Dependent information, 17 Dependent information converting means, 18 Dependent information printing means, 19 Dependent information input means, 20 Dependent information reverse converting means, 21 Restoring dependent information, 22 Verifying means, 40 Dependent information Storing means, 41 Dependent information reading means, 57 Confidential information, 58 Public information creating means, 59 Public information, 60
Registration means, 61 database, 62 signature target information, 63 signature information creating means, 64 signature information, 65
Signature information storage means, 66 signature information input means, 67 search means, 68 verification means.

Claims (7)

[Claims] 1. An information input means for reading information of a printed matter, an information converting means for converting the read information into electronic information, a dependency information creating means for creating dependency information dependent on the electronic information, and the dependency information. A verification information creation device for printed matter, comprising: dependence information conversion means for converting into a print format; and dependence information printing means for printing the converted dependence information on the printed matter. 2. The printed matter verification information creating apparatus according to claim 1, wherein the dependency information converted into the printing format is a barcode format. 3. An information input unit for reading information on a printed matter, an information converting unit for converting the read information into electronic information, a dependency information creating unit for creating dependent information depending on the electronic information, and printing on the printed matter. Information input means for reading the dependency information of the print format being read, dependency information inverse conversion means for inversely converting the read dependency information into the dependency information before the print format conversion, and the dependency information created by the dependency information creating means. And a verification unit for verifying the printed matter by collating the dependency information obtained by the inverse conversion by the dependency information reverse conversion unit, and a printed matter verification apparatus. 4. An information input means for reading information of printed matter, an information converting means for converting the read information into electronic information, a dependency information creating means for creating dependency information depending on the electronic information, and the dependency information. A verification information creation device for printed matter, comprising: dependence information saving means for saving. 5. An information input means for reading information of printed matter, an information converting means for converting the read information into electronic information, a dependency information creating means for creating dependency information depending on the electronic information, and a created dependency. A verification unit for verifying the printed matter by collating information and corresponding dependency information stored in advance in the dependency information storage unit; 6. A public information creating means for creating public information from secret information of a signer, a registration means for registering the public information in a database, an information input means for reading information of a printed matter, and a signature of the read information. Information conversion means for converting into target information, signature information creation means for creating signature information using the secret information for the signature target information, and signature information storage means for saving the signature information. An apparatus for creating verification information of printed matter characterized by: 7. An information input means for reading information of a printed matter, an information converting means for converting the read information into information to be signed, a signature information input means for extracting corresponding signature information from the signature information storing means, and a database. Verification of printed matter, comprising: search means for taking out public information registered in advance, and verification means for verifying the printed matter by collating the signature target information with the signature information and the public information. apparatus.