JPH11143969A - Authentication device for electronic seal impression - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate the genuineness of a stamped electronic seal impression by embedding additionally a serial number in the information which is prepared for an electronic document to recognize the electronic seal impression that is stuck to the document itself. SOLUTION: The data are read out of a book mark which is connected to an electronic seal impression and an electronic document when the seal impression stamped on the document to be authenticated is clicked double (201). Then a serial number which should be written into the read data are taken out (202). If the serial number cannot be taken out of the data, it's decided that the book mark is not a master but the copied one of another document and that the seal impression is forgery (203). When the serial number can be taken out, the data stored in a server are read out (204). The data on the document are compared with those on the server (205). Then the seal impression is decided as the genuine one when both serial numbers of the document and the server are coincident with each other (206).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an apparatus for authenticating a master of an electronic seal stamp used for an electronic document.

[0002]

2. Description of the Related Art In recent years, with the spread of electronic documents, electronic seals have come to be used in electronic documents as well as to seal seals on actual paper documents. Specific examples thereof include Shachihata Shoji Co., Ltd.'s trade name “PC decision”, “Electronic seal and electronic seal system” described in Japanese Patent No. 2500581, and “Seal synthesis function described in JP-A-8-241355. Workflow System and Control Method Thereof ", and" Electronic Sealing System "described in JP-A-8-305848. The "personal computer approval" can identify the stamped seal by giving a serial number as unique information to the electronic seal itself consisting of an object of an image file.

[0003] An "electronic seal and an electronic seal system" can identify a seal to be imprinted as a unique one, and has a seal for imprinting by issuing an electronic imprint corresponding to the seal. This is a system to prevent new users from making new seals. Further, the "workflow system having a seal composition function and its control method" operates only in a closed world in the workflow system. When a document in the system is stamped, the information is stored in a server, and the entire document is saved. Is a dedicated system that can guarantee The “electronic seal system” is a system that compares image information of a registered electronic seal stamp with image information of a stamped electronic seal stamp to determine whether the stamped electronic seal stamp is genuine or fake.

[0004]

However, in the world of Windows (a product name of Microsoft Corporation), which is the OS of a personal computer, an image file such as a bitmap file of a seal image is freely attached to an electronic document. However, it can be easily cut or copied at the same time by ordinary operations. For this reason, a fake document is easily created by copying and pasting the officially stamped electronic seal stamp on the forged electronic document. In addition, when the electronic seal stamp on the electronic document is not protected by using the function of the electronic document, falsification such as moving the stamp position of the electronic seal stamp can be easily performed.

[0005] That is, the above-mentioned "PC decision" is to individually identify the stamped seal by assigning unique information (serial number) to the electronic seal itself (object of the image file) in order to ensure reliability. It is possible to do. However, in this method, Window
If you copy via the clipboard by performing operations such as drag and drop that are usually performed on the s, this information is also copied along with the electronic seal stamp, and it becomes impossible to distinguish between the real and fake, It is easy to copy and create a forged document. Similarly, even when the seal is moved within the same document, it is impossible to determine whether the seal has been improperly moved from the position where the seal was properly stamped to another position.

[0006] Further, since the "electronic seal and electronic seal system" is a system for ensuring security at the time of sealing, it is impossible to prevent unauthorized copying of the seal after sealing. In addition, the “workflow system having a seal composition function and its control method” is a dedicated system that operates only in a closed world in the workflow system, and is not effective in a normally used environment outside the dedicated system.
Unauthorized copies cannot be identified. Similarly, the “electronic seal system” is effective in identifying forged electronic seal stamps because it makes decisions based on image information, but in the case of copied electronic seal stamps, the image information is exactly the same. And cannot be identified. As described above, the conventional digital seal cannot always be said to have sufficient security, and there has been a problem that reliability is lacking when the electronic seal is used as an approval system.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to a first aspect of the present invention is to provide an image of a seal for authentication, which is registered in advance as a digital seal in a seal column of an electronic document in which a seal is designated. Means for pasting and stamping an image file consisting of: and, at the same time as stamping the electronic document, creating a serial number and adding it to the image file pasted on the electronic document, and adding the serial number to the result of the stamping. A means for adding to the server and recording it as a seal history, and when an authentication command is input by specifying a seal on an electronic document, it is determined whether a serial number has been added to the image file of the seal and added. If not, the seal is judged to be fake, and if added, the serial number is further obtained from the history information of the seal recorded on the server. Call, the seal in the case of disagreement compared with the serial number that has been added to the image file determined to is fake, and further comprising a means for determining that the real in the case of coincidence.

[0010] According to a second aspect of the present invention, when an arbitrary position in the seal box of the electronic document is designated, an image file composed of a seal image for authentication registered in advance as an electronic seal stamp is pasted at the designated position. Means to read the coordinates of the image file pasting position at the same time as stamping the electronic document and add it to the image file pasted to the electronic document. When a command is input, a means to read the coordinates of the pasting position of the image file of the seal to be authenticated, and after the position coordinates of the seal to be authenticated are read, the coordinate data is already added to the image file of the seal to be authenticated It is determined whether or not the seal has been added. If the seal has not been added, the seal is determined to be fake. If a mismatch is compared with the target data and determines that the seal is fake, and further comprising a means for determining that the real in the case of coincidence.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an outline of an embodiment of the present invention will be described. According to an embodiment of the present invention, an image file for authentication, which is an electronic seal stamp, is pasted into a seal box of an electronic document, and a unique and encrypted serial number is created, and the electronic document is pasted on itself. The created serial number is additionally embedded in information prepared for recognizing the attached electronic seal stamp. Thereby,
Not only can the electronic seal stamp have unique information, but also the electronic seal can have unique information in a state associated with the electronic document.

As a result, when the digital seal is illegally copied to a different electronic document, only the image file is copied, and the unique information embedded in association with the original electronic document is not copied. It can be distinguished from electronic seal stamps. Since the seal on the electronic document can be distinguished from the original electronic seal in this way, by comparing the information possessed by the electronic seal stamp with the information stored in the database at the time of the seal, it is possible to check whether the sealed electronic seal is genuine. Enables identification of fake.

Further, according to an embodiment of the present invention, when the electronic seal stamp is stamped on the stamp column of the electronic document, the position where the image file for authentication is pasted, that is, the reference of the image data for authentication. For example, the vertical axis (X-axis) coordinate and the horizontal axis (Y-axis) coordinate of the upper left corner point are read, and the image file of the electronic seal stamp pasted on the electronic document as information at the time of sealing is stored in the image file itself. Hold. As a result, if the electronic seal is improperly moved and used after the electronic seal is stamped in the electronic document, the information on the position coordinates held in the electronic seal image file and the stamp of the electronic document are actually stored. By reading and comparing the position coordinates of the reference point of the authentication image data stamped on the electronic seal stamp, the electronic seal stamp stamped is recognized as a falsified copy, not a real copy.

Hereinafter, the embodiment will be specifically described with reference to the drawings. FIG. 1 is a flowchart showing the processing operation at the time of sealing according to the first embodiment. First, Microsoft Word software on Windows that can use electronic documents and electronic seals
(Microsoft product name), an electronic document having a seal box is stamped by attaching an image file, which is electronic seal data, to a designated position in the seal box. The pasted image file is recognized as an object in the electronic document, and a bookmark issued for each object is created on the electronic document side.

Simultaneously with the sealing, the user ID, the sealing time (year, month, day, hour, minute, second) and the sealing order are encrypted together to create a serial number that is absolutely not duplicated (step 101). Embedding (step 102). Further, this serial number is stored in the server together with the seal history information (step 103). The history information is data that can be visually identified by a human, such as a user name, a document name, and a sealing time. Further, the coordinates of the position where the image file is pasted are read, and the position coordinates are embedded in the object (step 104).

FIG. 2 is a flowchart showing an authentication processing operation performed after the processing of FIG. First, by double-clicking an electronic seal on an electronic document to be authenticated, data is read from a bookmark stored in association with the seal and the document (step 20).
1). Next, a serial number that should have been written is taken out of the read data (step 202).
If the serial number cannot be extracted, it is determined that the bookmark is not the master but a bookmark of another copied document, and that the seal is fake (step 203).

If the serial number can be taken out, the data (history information) stored in the server is read (step 204). Next, the document data is compared with the server data (step 20).
5) If both serial numbers are the same, it is determined to be the master, that is, the real one (step 206). If the two serial numbers are not the same, it is determined that the document is not a master and is a bookmark of another copied document, that is, a fake (step 207).

Next, FIG. 3 is a flowchart showing the operation of the second embodiment. This embodiment is for a case where it is determined that tampering such as moving a stamped electronic seal has been performed. is there. This embodiment is executed after the coordinates of the pasting position of the image file are embedded in the object in step 104 of FIG. First, by double-clicking the stamped electronic seal stamp, the coordinate data stored in the object is read (step 301). Next, coordinate position data is extracted from the read data (step 30).
2).

Here, if the coordinate position data cannot be taken out, it is determined that the fake has been falsified by being moved or forged after stamping (step 303). If the coordinate position data can be extracted, the extracted data is further read (step 304). Next, the position coordinates are read from the actual object and compared with the stored coordinate position data (step 305). If they are the same, it is determined that the object is a master, that is, a real one (step 3).
06). If they are not the same, it is considered that the document has been moved or forged after the seal, and it is determined that the document has been falsified (step 307).

As described above, according to the present invention, security can be ensured by being able to determine whether an authentication image file pasted on an electronic document is genuine or a duplicate, and important electronic documents can be stored in a library of a server. The electronic seal stamp can be used safely for processes that require authentication, such as storage and introduction of a business system using a workflow.

When the present invention is applied to the "personal computer decision" described in the section of the prior art, it is possible to provide information by linking the seal to a document, instead of having the seal itself. As a result, even if the seal is copied, the information linked to the document is not copied, so that illegal copying can be prevented, and the conventional problems can be solved. Similarly, when the present invention is applied to the “electronic seal stamp and electronic seal stamp system” described in the section of the related art, the security of the copy after sealing can be ensured, so that the conventional problems can be solved.

Similarly, when the present invention is applied to the “workflow system having a seal imprinting function and its control method” described in the section of the prior art,
This is also effective in preventing copying of an electronic seal stamp stamped on a normal electronic document on Windows, and can solve the conventional problems. Similarly, when the present invention is applied to the “electronic seal system” described in the section of the related art, it becomes possible to identify the image using information that cannot be copied, instead of a visual image. Solvable.

[0021]

As described above, according to the first aspect of the present invention, a serial number unique to the seal is created at the time of regular sealing and added to the image file pasted on the electronic document. By recording it in the server's seal history, any improper image file pasted to an electronic document by copying, etc., will have an inconsistency between the serial number and the seal history. Is recognized. As a result, improper stamping on the electronic document is prevented, and the reliability is improved.

According to the second aspect of the present invention, the coordinate data of the pasting position of the image file is added to the image file pasted on the electronic document at the time of the regular stamping, whereby the illegal copy or the same document Improperly moved, etc., will cause a discrepancy between the coordinate data added to the image file of the imprint and the actual position coordinates of the imprint, so the imprint will be recognized as an improper imprint .
This prevents fraudulent stamping on electronic documents,
Reliability is improved.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a processing operation at the time of sealing according to a first embodiment.

FIG. 2 is a flowchart illustrating a processing operation at the time of authentication according to the first embodiment;

FIG. 3 is a flowchart illustrating a processing operation at the time of authentication according to a second embodiment;

Claims (2)

[Claims] Claims: 1. An electronic document having a designated seal is provided in a seal column.
A means for pasting and stamping an image file consisting of a seal image for authentication registered in advance as an electronic seal stamp, and a method for creating a serial number and attaching the image file pasted to the electronic document at the same time as stamping the electronic document. In addition to the means for adding the serial number created to the seal result and recording it as a seal history on the server, and specifying the seal on the electronic document and inputting the authentication command,
It is determined whether or not a serial number has been added to the image file of the seal. If the serial number has not been added, the seal is determined to be fake, and if the serial number has been added, the seal is further recorded on the server. Means for retrieving the serial number from the history information of, comparing the serial number with the serial number added to the image file, determining that the seal is fake if the two do not match, and determining that the seal is genuine if the two match. An authentication device for an electronic seal stamp, comprising: 2. A means for pasting an image file consisting of a seal image for authentication registered in advance as an electronic seal stamp to a designated position and stamping when an arbitrary position in a seal field of the electronic document is designated. A means for reading the coordinates of the pasting position of the image file at the same time as stamping on the electronic document and adding it to the image file pasted on the electronic document, and inputting an authentication command by designating the stamp on the electronic document When,
A means for reading the coordinates of the pasting position of the image file of the seal to be authenticated, and determining whether or not coordinate data has already been added to the image file of the seal to be authenticated after the position coordinates of the seal to be authenticated have been read. If not added, the seal is judged to be fake, and if added, the coordinate data is compared with the newly read coordinate data.If they do not match, the seal is considered to be fake. Means for judging and, in the case of a match, judging the authenticity, an authentication device for an electronic seal stamp, comprising: