JP6900567B1 - Imprint image system, imprint image method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imprint image system, an imprint image method and a program capable of preventing unauthorized use of an imprint image by another person and modification of a document file after imprint imprinting. SOLUTION: A means for generating an imprint container in which additional information about a user who uses the imprint image in the imprint image and additional information about the imprint image are associated with the imprint image system 1 and a predetermined authentication for the imprint container. The means for attaching the collation data for authentication, the means for acquiring the collation data for authentication with respect to the imprint container that has received the selection to use the imprint image, and the acquired collation data are for the predetermined authentication. When it matches the collation data, a means for imprinting the imprint image of the container that has accepted the selection on the predetermined document data and associating the imprint container with the predetermined document data, and the imprint image of the predetermined document data. It is provided with means for confirming the additional information about the user who uses the imprint image and the additional information about the imprint image. [Selection diagram] Fig. 1

Description

The present invention relates to an imprint image system, an imprint image method and a program for using an imprint image.

Conventionally, there has been known a device that recognizes an image of an imprint of a seal stamp and collates the imprint of the seal stamp in a financial transaction or the like (Patent Document 1).

Japanese Patent Application Laid-Open No. 2020-052860

However, with the technique of Patent Document 1, although it is possible to collate the imprint, this image is copied as image data by taking a picture of the imprint of the seal stamp, and another person illegally imprints the imprint on another document file. Diversion cannot be prevented. In addition, it is not possible to detect whether or not the document file has been modified after the imprint is imprinted.

In response to this problem, the present inventors generate an imprint container in which additional information about a user who uses the imprint image for the imprint image and additional information about the imprint image are associated with each other, and further, collation data for authentication is generated in the imprint container. We focused on the fact that unauthorized use can be prevented by adding. In addition, by using the password, the hash value of the imprint image, the hash value of the document data, the self-written information, the face image, etc. as the verification data for authentication, the person who imprinted (inserted) the imprint can be confirmed and the imprint can be confirmed. We focused on being able to detect whether the document file was modified after it was stamped.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to prevent unauthorized use of the imprint image by another person and modification of the document file after imprint imprint by a mechanism that can add and confirm additional information (seal person, imprint location, time, etc.) regarding the imprint image. It is an object of the present invention to provide an imprint image system, an imprint image method and a program.

The present invention provides the following solutions.

The invention according to the first feature is
It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching a hash value of an imprint image to the imprint container as verification data for authentication, and
A collation data acquisition means for generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Document correspondence means to associate with document data,
A confirmation means for confirming the imprint image of the predetermined document data with additional information about a user who uses the imprint image and additional information about the imprint image including a hash value of the imprint image.
Provide an imprint image system.

According to the invention according to the first feature, in the imprint image system for using the imprint image, the imprint image is associated with the additional information about the user who uses the imprint image and the additional information about the imprint image. The imprint container generating means for generating the imprint container, the collation data giving means for attaching the hash value of the imprint image to the imprint container as the collation data for authentication, and the imprint container that has received the selection to use the imprint image. On the other hand, the collation data acquisition means for generating and acquiring the hash value of the imprint image of the imprint container that received the selection and the hash value of the generated imprint image matched the hash value at the time of generating the imprint container. In this case, the imprint image of the container that has received the selection is imprinted on the predetermined document data, the imprint container is associated with the predetermined document data, and the imprint image of the predetermined document data is imprinted on the imprint image of the predetermined document data. It is provided with a confirmation means for confirming with additional information about a user who uses the image and additional information about the imprint image including a hash value of the imprint image.

The invention according to the first feature is in the category of imprint image system, but the imprint image method and the program also have the same action and effect.

The invention according to the second feature is
It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching self-written information to the imprint container as collation data for authentication,
A collation data acquisition means for acquiring the self-written information from the imprint container that has been selected to use the imprint image, and
When the self-written information of the imprint container and the self-written information acquired at the time of document correspondence are compared and matched, the imprint image of the container accepting the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document. Document correspondence means to associate with the document data of
A confirmation means for confirming the imprint image of the predetermined document data with additional information about the user who uses the imprint image and additional information about the imprint image including the self-written information.
Provide an imprint image system.

According to the invention according to the second feature, in the imprint image system for using the imprint image, the imprint image is associated with the additional information about the user who uses the imprint image and the additional information about the imprint image. The imprint container generating means for generating the imprint container, the collation data assigning means for attaching the self-written information to the imprint container as the collation data for authentication, and the self from the imprint container that has received the selection to use the imprint image. When the collation data acquisition means for acquiring the document information and the self-written information of the imprint container and the self-written information acquired at the time of document correspondence are compared and matched, the imprint image of the container that accepts the selection is used as a predetermined document. A document-corresponding means for imprinting the data and associating the imprint container with the predetermined document data, and the imprint image of the predetermined document data, including additional information about a user who uses the imprint image and the self-written information. It is provided with a confirmation means for confirming with additional information regarding the imprint image.

The invention according to the third feature is
It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching a face image to the imprint container as collation data for authentication, and
A collation data acquisition means for acquiring the face image from the imprint container that has been selected to use the imprint image, and
When the face image of the imprint container and the face image acquired at the time of document correspondence are compared and matched, the imprint image of the container that accepts the selection is stamped on the predetermined document data, and the imprint container is used for the predetermined document. Document correspondence means to associate with data,
A confirmation means for confirming the imprint image of the predetermined document data with additional information regarding the user who uses the imprint image and additional information regarding the imprint image including the face image.
Provide an imprint image system.

According to the invention according to the third feature, in the imprint image system for using the imprint image, the imprint image is associated with the additional information about the user who uses the imprint image and the additional information about the imprint image. The imprint container generating means for generating the imprint container, the collation data giving means for attaching the face image to the imprint container as the collation data for authentication, and the face image from the imprint container that has received the selection to use the imprint image. When the collation data acquisition means for acquiring the above is compared with the face image of the imprint container and the face image acquired at the time of document correspondence, the imprint image of the container that accepts the selection is stamped on the predetermined document data. , A document-corresponding means for associating the imprint container with the predetermined document data, and additional information regarding the user who uses the imprint image and the imprint image including the face image of the imprint image of the predetermined document data. It is provided with a confirmation means for confirming with.

The invention according to the fourth feature is an imprint image system according to the first feature.
The additional information about the imprint image includes the hash value of the imprint image.
When the hash value of the imprint image matches the hash value generated from the imprint image to be imprinted , the document-corresponding means imprints the imprint image of the container that has accepted the selection on the predetermined document data, and imprints the imprint. Provided is an imprint image system that associates a container with predetermined document data.

According to the invention of the fourth aspect, the imprint image system is the invention according to the first aspect, the additional information on the imprint image includes a hash value of the imprint image, the document associating means, said When the hash value of the imprint image matches the hash value generated from the imprint image to be stamped, the imprint image of the container that accepts the selection is stamped on the predetermined document data, and the imprint container is associated with the predetermined document data. ..

The invention according to the fifth feature is an imprint image system which is an invention according to any one of the first to fourth features.
The confirmation means provides an imprint image system including additional information display means for displaying additional information about the user and additional information about the imprint image.

According to the invention relating to the fifth feature, in the imprint image system according to the invention according to any one of the first to fourth features, the confirmation means includes additional information regarding the user and additional information regarding the imprint image. An additional information display means for displaying is provided.

The invention according to the sixth feature is an imprint image system which is an invention according to any one of the first to fifth features.
The additional information about the imprint image includes the hash value of the imprint image.
The confirmation means confirms the imprint image of the predetermined document data with additional information about the imprint image.
An imprint image system that confirms the authenticity of the imprint image of the predetermined document data by comparing the hash value of the imprint image stored in the imprint container with the hash value generated from the imprint image of the predetermined document data. I will provide a.

According to the invention according to the sixth feature, in the imprint image system which is the invention according to any one of the first to fifth features, the additional information regarding the imprint image includes the hash value of the imprint image and the confirmation. When the means confirms the imprint image of the predetermined document data with additional information about the imprint image, the authenticity of the imprint image of the predetermined document data is determined by the hash value of the imprint image stored in the imprint container. , Check by comparing with the hash value generated from the imprint image of the predetermined document data.

The invention according to the seventh feature is an imprint image system which is an invention according to any one of the first to sixth features.
When the imprint container is associated with the predetermined document data, the document-corresponding means stores the information stored in the imprint container in the predetermined document data, and then stores the hash value of the predetermined document data in the predetermined document data. Stored in the document data of
The confirmation means further confirms the authenticity of the predetermined document data by comparing the hash value of the document data stored in the predetermined document data with the hash value generated from the predetermined document data. Provides an image system.

According to the invention according to the seventh feature, in the imprint image system which is the invention according to any one of the first to sixth features, the document-corresponding means is used when associating the imprint container with predetermined document data. After storing the information stored in the imprint container in the predetermined document data, the hash value of the predetermined document data is also stored in the predetermined document data, and the confirmation means further obtains the predetermined document data. The authenticity is confirmed by comparing the hash value of the document data stored in the predetermined document data with the hash value generated from the predetermined document data.

The invention according to the eighth feature is an imprint image system which is an invention according to any one of the first to seventh features.
The imprint container provides an electronic data in which seal stamp information is stored or an imprint image system which is a dedicated device.

According to the invention according to the eighth feature, in the imprint image system which is the invention according to any one of the first to seventh features, the imprint container is electronic data or a dedicated device in which seal stamp information is stored.

The invention according to the ninth feature is an imprint image system which is an invention according to any one of the first to eighth features.
The imprint container generation means sets a flag of input request information for each additional information in the imprint container, and sets a flag.
The document-corresponding means provides an imprint image system that requests a user to input the additional information when the input request information flag is on.

According to the invention according to the ninth feature, in the imprint image system which is the invention according to any one of the first to eighth features, the imprint container generating means is used for each additional information in the imprint container. The input request information flag is set, and the document-corresponding means requests the user to input the additional information when the input request information flag is on.

The invention according to the tenth feature is
In the imprint image method for using the imprint image,
A step of generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A step of attaching the hash value of the imprint image to the imprint container as verification data for authentication, and
A step of generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Steps to associate with document data and
A step of confirming the imprint image of the predetermined document data with additional information about the user who uses the imprint image and additional information about the imprint image including the hash value of the imprint image, and
Provided is an imprint image method comprising.

The invention according to the eleventh feature is
For the imprint image system for using the imprint image,
A step of generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A step of attaching a hash value of an imprint image to the imprint container as verification data for authentication.
A step of generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Steps to associate with document data ,
A step of confirming an imprint image of the predetermined document data with additional information about a user who uses the imprint image and additional information about the imprint image including a hash value of the imprint image.
Provide a program to execute.

According to the present invention, an imprint image system and an imprint image capable of preventing unauthorized use of the imprint image by another person and modification of a document file after imprint imprint by a mechanism that can add and confirm additional information about the imprint image. It becomes possible to provide methods and programs.

FIG. 1 is a diagram showing an outline of the imprint image system 1. FIG. 2 is a configuration diagram of the imprint image system 1. FIG. 3 is a diagram showing a flowchart of the imprint image utilization process executed by the imprint image system 1. FIG. 4 is a diagram showing an example of data included in the imprint container. FIG. 5 is a table showing the timing of attaching data to the imprint container. FIG. 6 is an example of the imprint information screen displayed when confirming the imprint. FIG. 7 is a diagram schematically showing an example in the case where the imprint image system 1 detects unauthorized use of the imprint image. FIG. 8 is a diagram showing a flowchart of the imprint image hash value check process. FIG. 9 is a diagram showing a flowchart of the document data hash value check process. FIG. 10 is an example of displaying a screen for making an input request when the flag of the input request information is on.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. It should be noted that this is just an example, and the technical scope of the present invention is not limited to this.

[Overview of Imprint Image System 1]
An outline of a preferred embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram for explaining an outline of an imprint image system 1 which is a preferred embodiment of the present invention. The imprint image system 1 is a computer system composed of a server 2, a user terminal 3, and a communication network 6 for using the imprint image. The imprint image system 1 may include a seal imprint scanner 5 as a device for incorporating the imprint of the seal stamp 4 into the imprint image system 1. The seal stamp scanner 5 is not always necessary as a configuration, and may be a configuration in which the seal imprint of the seal stamp 4 can be photographed by a camera device, or a configuration in which image data of the seal imprint can be received via an external medium or a communication unit.

The imprint image system 1 may include other terminals, devices, and the like. For example, a different user terminal 3 may be used for each user. In this case, the imprint image system 1 performs each process described later with the server 2, the user terminal 3, and other included terminals and devices. It will be executed by any one or a combination of two or more.

Further, the server 2 of the imprint image system 1 may be realized by, for example, one terminal device, a plurality of terminal devices, or a virtual device such as a cloud computer. You may.

The server 2 and the user terminal 3 are, for example, computers such as desktop personal computers, laptop computers and servers, mobile terminals such as smartphones and tablet terminals, wearable terminals such as head mount displays such as smart glasses and smart watches, and other terminals. It is connected to a computer, a device, and the like via a communication network 6 so as to be capable of data communication, and transmits and receives necessary data and information. The communication network 6 is a network such as the Internet that enables communication between the server 2 and the user terminal 3.

Next, the imprint container will be described. FIG. 4 is a diagram showing an example of data included in the imprint container. In the imprint image system 1, the imprint container is composed of "imprint image", "additional information", and "collation data". Specifically, the imprint container may be data in the format of a PDF file or the like. Here, the "imprint image" is imprint image data to be used for imprint (imprint insertion) processing in the imprint image system 1 based on an image obtained by scanning the imprint or an image taken by a camera. "Additional information" is imprint of "inserter name", "inserter ID", "device ID", "insertion date and time", "location information (GPS)", "self-written information", "face image", etc. Information about the user who uses the image, or information about the imprint image. The "verification data" is information used for verification at the time of authentication such as "encryption password", "hash value of imprint image", "hash value of document data", "self-written information", and "face image". "Self-written information" and "face image" are data corresponding to both "additional information" and "collation data". The "inserter name" and "inserter ID" are the names and IDs of users who can identify the user who uses the imprint image. The "device ID" is an ID for identifying a device such as a stamp scanner 5 or a camera used. The "insertion date and time" is the date and time when the imprint container was inserted (stamped) in the document file. "Position information (GPS)" is position information when a stamp scanner 5, a camera device, or a stamp imprint container such as a user terminal 3 is inserted into a document file. "Self-writing information" is information including stroke data such as stroke, writing order, writing pressure, movement speed, etc. of self-writing, which is a handwriting input by handwriting with a digital pen or fingertip on a tablet or touch panel, and is a password for self-writing. It is individually encrypted. The "face image" is the face image data of the user who uses the imprint image, and is individually encrypted with the password for the face image. The "encryption password" is a password for encrypting the imprint container. The "hash value of the imprint image" is a value obtained by encrypting the hash value of the imprint image with an encryption password. The "document data hash value" is a value obtained by encrypting the hash value of the document file with an encryption password.

FIG. 5 is a table showing the timing of attaching data to the imprint container. Unchanging data such as "inserter name", "inserter ID", "device ID", "encrypted password", and "hash value of imprint image" are attached at the time of imprint registration. Fluctuating information such as "insertion date and time", "location information (GPS)", and "hash value of document data" is attached when the seal is inserted. Data such as "self-written information" and "face image" may be attached at the time of stamp registration or at the time of stamp insertion.

Returning to FIG. 1, an outline of the processing executed by the imprint image system 1 will be described. The imprint image system 1 first registers the imprint (step S01). Specifically, as the content of the imprint registration, first, the imprint of the seal 4 is acquired by the seal scanner 5, created, and transmitted to the server 2 as the imprint image. The imprint image may be acquired by a camera device or the like, or the imprint image data may be received via an external medium or a communication unit. At this time, the imprint image may be sent to the server 2 via the user terminal 3. Further, the "inserter name" and "inserter ID" are used as information on the user who uses this imprint, the "device ID" which is a unique ID capable of identifying the seal scanner 5 as the information on the imprint image, and the imprint container are used. Data such as the "encryption password", which is the password at the time, is also transmitted to the server 2. Further, information about the user such as "self-written information" and "face image" may also be transmitted here. The server 2 registers the "inserter name", "inserter ID", and "encryption password" as user information in the imprint image system 1 based on the received data. In addition, an imprint container is generated based on the received imprint image and data. As described above, the imprint container includes a "imprint image", "additional information" about the user or the imprint image using the imprint image, and "verification data" for authentication. Here, "inserter name", "inserter ID", and "device ID" are added as additional information. Further, an "encryption password" and a "hash value of the imprint image" are added to the generated imprint container as predetermined verification data for authentication. As described above, the "hash value of the imprint image" is a value obtained by encrypting the hash value of the imprint image with an encryption password. Appropriate prior art can be used for the hash value calculation method and the encryption method. Further, as the encryption key, not only the encryption password but also other appropriate data in the additional information may be used.

The imprint registration in step S01 is a necessary preparation for the user to use the imprint image system 1, and it is assumed that only the imprints to be used are registered in the imprint image system 1.

Next, when the user wants to imprint the document file, that is, when he / she wants to associate the imprint container with the document file, the imprint is inserted on the user terminal 3 (step S02). As the document file here, a file format such as a PDF file can be used. When the user wants to imprint a document file, first select the document and the imprint container. Then, the verification data for authentication is acquired for the selected imprint container. The verification data for authentication here is an "encryption password", a "hash value of an imprint image", or the like. The verification data for authentication is acquired via the input unit of the user terminal 3 or the like, and the verification data in the imprint container is compared with the verification data. If the collation data matches as a result of the comparison, the imprint container is associated with the document file. To associate an imprint container with a document file is specifically to attach "seal information" extracted from the imprint container to the document data and save it as stamped document data. Here, the "seal stamp information" is the imprint image stored in the imprint container and the additional information or the collation data information. As a result of the comparison, if the collation data does not match, it is determined that the stamp cannot be stamped, and an error or the like indicating that fact is output to the output unit of the user terminal 3. In addition, data such as "insertion date and time", "location information (GPS)", and "hash value of document data" are added to the "seal stamp information" extracted from the imprint container here, and "seal stamp information" is added to the document data. Save as. As described above, the "document data hash value" is a value obtained by encrypting the hash value of the document file with an encryption password.

Finally, when the user wants to confirm the imprinted document, the imprint image system 1 confirms the imprint (step S03). When the stamped person or another user wants to check the stamped document, the user terminal 3 sends a stamp imprint confirmation request to the server 2. In this imprint confirmation request, the imprinted document data is transmitted to the server 2. The server 2 is displayed on the output unit of the user terminal 3 in order for the user to confirm the additional information of the stamped document data. For example, in the lower part of FIG. 1, the "inserter name" of the additional information of the imprint container is "name", the "inserter ID" is "ID", the "insertion date and time" is "seal date and time", and the "position information (GPS)". ) ”Is shown as“ GPS ”and“ self-written information ”as“ self-written stroke ”. Based on this display, the user can confirm not only the imprint image but also the information. At the same time, the authenticity of the received stamped document may be checked using the "hash value of the imprint image". In that case, the server 2 decrypts "the hash value of the imprint image in the received imprint container" and "the hash value of the imprint image in the additional information of the received imprint container" with the encrypted password. If the data match, it is considered that the user who registered the imprint has stamped the stamp with the regular route. If the data do not match, it is considered that there is a possibility that someone other than the user has stamped the data by an illegal route. The result of the comparison shall be transmitted to the user terminal 3 and output via the output unit of the user terminal 3. As the authenticity check, a check using "a hash value of document data" may be further performed. By comparing the hash values of the document data, it is possible to confirm whether the document has been modified. In this case, the data is obtained by comparing "the calculated hash value of the document file" with "the hash value of the document data decrypted with the encrypted password" in the "seal information" of the document data. If they match, it can be determined that the document file has not been modified after the imprint was imprinted. If the data do not match, it is considered that some data in the document has been modified after the stamping process. The details of the imprint image hash value check process and the document data hash value check process will be described later.

As described above, according to the present invention, it is possible to prevent unauthorized use of the imprint image by another person and modification of the document file after the imprint is imprinted by the mechanism for adding and confirming additional information regarding the imprint image.

The above is the outline of the processing executed by the imprint image system 1.

[System configuration of imprint image system 1]
The system configuration of the imprint image system 1 which is a preferred embodiment of the present invention will be described with reference to FIG. FIG. 2 is a diagram showing a system configuration of an imprint image system 1 which is a preferred embodiment of the present invention. In FIG. 2, the imprint image system 1 is a computer system composed of a server 2, a user terminal 3, and a communication network 6 for using the imprint image. The stamp image system may include a stamp scanner 5 as a device for incorporating the stamp imprint of the stamp 4. The seal stamp scanner 5 is not always necessary as a configuration, and may be a configuration in which the seal imprint of the seal stamp 4 can be photographed by a camera device, or a configuration in which image data of the seal imprint can be received via an external medium or a communication unit.

The imprint image system 1 may include other terminals, devices, and the like. For example, a different user terminal 3 may be used for each user. In this case, the imprint image system 1 performs each process described later with the server 2, the user terminal 3, and other included terminals and devices. It will be executed by any one or a combination of two or more.

Further, the server 2 of the imprint image system 1 may be realized by, for example, one terminal device, a plurality of terminal devices, or a virtual device such as a cloud computer. You may.

The server 2 and the user terminal 3 are, for example, computers such as desktop personal computers, laptop computers and servers, mobile terminals such as smartphones and tablet terminals, wearable terminals such as head mount displays such as smart glasses and smart watches, and other terminals. It is connected to a computer, a device, and the like via a communication network 6 so as to be capable of data communication, and transmits and receives necessary data and information. The communication network 6 is a network such as the Internet that enables communication between the server 2 and the user terminal 3.

The server 2 has a function as the imprint acquisition unit 210 for incorporating the imprint of the seal stamp 4 into the imprint image system 1. For example, it is a function of acquiring a stamp impression from a stamp scanner 5, a camera device, a device that reads image data of the stamp impression from an external medium, and the like. The image data of the imprint may be received via the communication unit 240. The imprint may be acquired via the user terminal 3. The imprint acquisition unit 210 realizes the imprint container generation module 211 in cooperation with the control unit 220 and the storage unit 230.

The server 2 includes a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like as the control unit 220. The control unit 220 cooperates with the storage unit 230 and the communication unit 240 to realize the collation data addition module 221 and the confirmation module 222.

The server 2 includes data storage such as a hard disk, a semiconductor memory, a recording medium, and a memory card as the storage unit 230. The data storage destination may be a cloud service, a database, or the like.

The server 2 includes a device as a communication unit 240 for enabling communication with other terminals, devices, and the like. The communication method may be wireless or wired.

As the input unit 250, the server 2 is provided with a function necessary for the administrator of the imprint image system 1 to operate the server 2. As an example for realizing input, it is possible to provide a liquid crystal display that realizes a touch panel function, a keyboard, a mouse, a pen tablet, a hardware button on the device, a microphone for voice recognition, and the like. The function of the present invention is not particularly limited depending on the input method.

As the output unit 260, the server 2 is provided with functions necessary for the administrator of the imprint image system 1 to operate the server 2. As an example for realizing the output, a liquid crystal display, a PC display, a display such as a projection on a projector, and a form such as an audio output can be considered. The function of the present invention is not particularly limited depending on the output method.

The user terminal 3 includes a CPU, GPU, RAM, ROM, and the like as a control unit 320. The control unit 320 cooperates with the storage unit 330 and the communication unit 340 to realize the collation data acquisition module 321 and the document correspondence module 322.

The user terminal 3 includes data storage such as a hard disk, a semiconductor memory, a recording medium, and a memory card as a storage unit 330.

The user terminal 3 includes a device as a communication unit 340 for enabling communication with other terminals, devices, and the like. The communication method may be wireless or wired.

As the input unit 350, the user terminal 3 is provided with a function necessary for the user of the imprint image system 1 to operate the user terminal 3. As an example for realizing input, it is possible to provide a liquid crystal display that realizes a touch panel function, a keyboard, a mouse, a pen tablet, a hardware button on the device, a microphone for voice recognition, and the like. The function of the present invention is not particularly limited depending on the input method.

As the output unit 360, the user terminal 3 is provided with a function necessary for the user of the imprint image system 1 to operate the user terminal 3. The output unit 360 realizes the additional information display module 361 in cooperation with the control unit 320 and the communication unit 340. It is assumed that the additional information display module 361 operates based on the instruction of the confirmation module 222 of the server 2. As an example for realizing output by the output unit 360, a display such as a liquid crystal display, a PC display, a projection on a projector, and an audio output can be considered. The function of the present invention is not particularly limited depending on the output method.

The communication network 6 is a network such as the Internet that enables communication between the server 2 and the user terminal 3. If there are other terminals, devices, etc., communication with them may be possible.

[Imprint image utilization processing]
The imprint image utilization process executed by the imprint image system 1 will be described with reference to FIG. FIG. 3 is a diagram showing a flowchart of the imprint image utilization process executed by the imprint image system 1. The process executed by each of the above-mentioned modules will be described together with this process.

The user terminal 3 of the imprint image system 1 first creates an imprint image and transmits it to the server 2 (step S301). Specifically, the stamp imprint of the stamp 4 is acquired by the stamp scanner 5, created, and transmitted to the server 2 as a stamp image. The imprint image is not limited to being acquired by the seal scanner 5, but may be acquired by a camera device or the like, or the image data of the imprint may be acquired via an external medium or a communication unit 240. Further, the "inserter name" and "inserter ID" are used as information on the user who uses this imprint, the "device ID" which is a unique ID capable of identifying the seal scanner 5 as the information on the imprint image, and the imprint container are used. Data such as the "encryption password", which is the password at the time, is also transmitted to the server 2. Further, information about the user such as "self-written information" and "face image" may also be transmitted here. Although FIG. 3 shows an example in which the imprint image is transmitted from the user terminal 3 to the server 2, the imprint acquisition unit 210 of the server 2 may directly acquire the imprint image without going through the user terminal 3.

Next, the imprint container generation module 211 of the server 2 registers the "inserter name", "inserter ID", and "encryption password" as user information in the imprint image system 1 based on the received data (step S302). ).

Then, the imprint container generation module 211 generates an imprint container based on the received imprint image and data (step S303). As described above, the imprint container includes a "imprint image", "additional information" about the user or the imprint image using the imprint image, and "verification data" for authentication. Here, "inserter name", "inserter ID", and "device ID" are added as additional information.

The collation data addition module 221 attaches an "encryption password" and a "hash value of the imprint image" to the generated imprint container as predetermined authentication collation data (step S304). As described above, the "hash value of the imprint image" is a value obtained by encrypting the hash value of the imprint image with an encryption password. Appropriate prior art can be used for the hash value calculation method and the encryption method. Further, as the encryption key, not only the encryption password but also other appropriate data in the additional information may be used.

When the user terminal 3 transmits information about the user such as "self-written information" and "face image" to the server 2 in step S301, the imprint container generation module 211 transmits these information in step S303. Attached to the imprint container as additional information. "Self-written information" and "face information" are attached to the imprint container as additional information, but are also used as collation data.

Steps S301 to S304 correspond to step S01 imprint registration in FIG. 1, which is a necessary preparation for the user to use the imprint image system 1, and only the imprints to be used are registered in the imprint image system 1. It shall be. The imprint container with the created collation data may be distributed to the user terminal 3.

When the user wants to imprint the document file, that is, when he / she wants to associate the imprint container with the document file, the document correspondence module 322 of the user terminal 3 selects the document file and the imprint container (step). S305). The imprint container to be used shall be acquired from the server 2. As the document file here, a file format such as a PDF file can be used.

Next, the collation data acquisition module 321 of the user terminal 3 acquires the verification data for authentication with respect to the selected imprint container (step S306). The verification data for authentication here is an "encryption password", a "hash value of an imprint image", or the like. The verification data for authentication is acquired via the input unit 350 or the like of the user terminal 3.

The collation data acquisition module 321 compares whether or not the acquired collation data for authentication and the collation data in the imprint container match (step S307). As a result of the comparison, if the collation data matches, the process proceeds to step S308, and if the collation data do not match, the seal cannot be stamped and an error or the like indicating that fact is output via the output unit of the user terminal 3. And end. As the verification data for authentication, only the "encryption password" may be used, only the "hash value of the imprint image" may be used, or the "encryption password" and the "hash value of the imprint image". Both may be used, and which one is used can be set.

When the collation data match, the document correspondence module 322 associates the imprint container with the document file (step S308). To associate an imprint container with a document file is specifically to attach "seal information" extracted from the imprint container to the document data and save it as stamped document data. As described above, the "seal stamp information" is the imprint image stored in the imprint container and the additional information or collation data information. In addition, data such as "insertion date and time", "location information (GPS)", and "hash value of document data" are added to the "seal stamp information" extracted from the imprint container here, and "seal stamp information" is added to the document data. Save as. As described above, the "document data hash value" is a value obtained by encrypting the hash value of the document file with an encryption password.

When the user terminal 3 inputs information about the user such as "self-written information" and "face image" when the imprint container is selected in step S305, the document correspondence module 322 imprints these information in step S308. It is added to the "seal information" extracted from the container and saved as "seal information" in the document data.

Steps S305 to S308 correspond to step S02 imprint insertion in FIG. 1, and are processes for the user to imprint a document file.

When the user wants to confirm the stamped document, the user terminal 3 transmits a stamp imprint confirmation request to the server 2 (step S309). In this imprint confirmation request, the imprinted document data is transmitted to the server 2.

The confirmation module 222 of the server 2 causes the output unit 360 to display the additional information of the stamped document data by the additional information display module 361 of the user terminal 3 (step S310).

FIG. 6 is an example of the imprint information screen displayed when confirming the imprint. FIG. 6 illustrates the imprint information screen 601 when the imprint information of the document file is to be displayed. The "inserter name" of the additional information of the imprint container is "name", the "inserter ID" is "ID", the "insertion date and time" is "seal date and time", the "location information (GPS)" is "GPS", and "self". An example of displaying "written information" as "self-written stroke" is shown. Here, since the additional information "self-written information" is individually encrypted with the self-written password, the "self-written stroke" may be displayed only when the self-written password is input. .. Based on this display, the user can confirm not only the imprint image but also the additional information. Further, by providing a button such as "illegal confirmation" on the imprint information confirmation screen, it may be possible to further perform an authenticity check and confirm whether or not the imprint of the document file has been fraudulent. In that case, the imprint image hash value check and the document data hash value check are performed by pressing the fraud confirmation button 602. When checking the imprint image hash value, the confirmation module 222 of the server 2 states that "the hash value of the imprint image in the received imprint container is calculated" and "the imprint image in the additional information of the received imprint container". If the data matches, it is considered that the user who registered the imprint has stamped the stamp with the regular route by comparing it with the "hash value" decrypted with the encrypted password. If the data do not match, it is considered that there is a possibility that someone other than the user has stamped the data by an illegal route. When checking the document data hash value, the confirmation module 222 of the server 2 decrypts the "calculated document file hash value" and the "document data hash value" in the additional information of the imprint container with an encrypted password. If the data match, it can be determined that the document file has not been modified after the imprint was imprinted. If the data do not match, it is considered that some data in the document has been modified after the stamping process. The result of these comparisons shall be transmitted to the user terminal 3 and output via the output unit of the user terminal 3. The details of the imprint image hash value check process and the document data hash value check process will be described later.

Next, an example of detecting unauthorized use of the imprint image will be described with reference to FIG. 7. FIG. 7 is a diagram schematically showing an example in the case where the imprint image system 1 detects unauthorized use of the imprint image.

It is assumed that the imprint container in which the additional information of Mr. A is associated with the imprint image of Mr. A is already registered in the imprint image system 1.

The upper part of FIG. 7 shows a case where Mr. A himself tries to imprint the imprint image of Mr. A on the document file. The lower part of FIG. 7 shows a case where Mr. B illegally imprints the imprint image of Mr. A on the document file. It is assumed that Mr. B adds appropriate additional information to Mr. A's imprint image and creates an illegal imprint container by himself. In this case, the "hash value of the imprint image" of the additional information is considered to be nonexistent or an inappropriate value. The "document data hash value" is set in the additional information by encrypting the document file hash value with Mr. B's encryption password when Mr. B stamps the document file.

Here, when the fraudulent use is checked using the "hash value of the imprint image", the "hash value of the imprint image" of the additional information does not exist or is an inappropriate value, so that the imprint image Unauthorized use can be detected by hash value check processing. However, if the unauthorized use is checked using the "document data hash value", the hash value of the document data encrypted with Mr. B's encrypted password will be decrypted with Mr. B's encrypted password. Therefore, unauthorized use cannot be detected by the document data hash value check process. In this way, by using both the "hash value of the imprint image" and the "hash value of the document data" as the collation data, it is possible to improve the detection accuracy of unauthorized use. The details of the imprint image hash value check process and the document data hash value check process will be described later.

If Mr. B creates an illegal imprint container by himself, Mr. B is familiar with the imprint container and the creation of the document file after imprinting, and Mr. B's own "value obtained by encrypting the hash value of the image" If the value encrypted with the encryption password is set as additional information, the procedure is correct except that the "stolen Mr. A's imprint image" is used, so the imprint image hash value check process. However, even the document data hash value check process cannot detect unauthorized use. In this way, when it is difficult to detect unauthorized use only with the data stored in the document file, the imprint image system 1 stores the information for each user or the user's legitimate imprint container itself, and inserts the imprint. Sometimes, by comparing the data in the imprint image system 1 with the data in the document file, it is possible to detect unauthorized use.

Steps S309 to S310 correspond to step S03 imprint confirmation in FIG. 1, and are processes for confirming the information of the person who imprinted the document file by the user and confirming the authenticity of the document data.

In the above, the explanation is based on the assumption that an individual imprint image is used, but when using a company or corporate imprint image, a shared encrypted password is used so that multiple people with the authority to imprint can imprint. It may be set.

As described above, according to the present invention, it is possible to prevent unauthorized use of the imprint image by another person and modification of the document file after the imprint is imprinted by the mechanism for adding and confirming additional information regarding the imprint image.

The above is the imprint image utilization process.

[Imprint image hash value check process]
The imprint image hash value check process will be described with reference to FIG. FIG. 8 is a diagram showing a flowchart of the imprint image hash value check process.

The imprint image hash value check process is performed when the confirmation module 222 of the server 2 compares whether or not the acquired collation data matches the collation data for predetermined authentication.

First, the confirmation module 222 calculates the hash value of the imprint image in the "seal information" of the acquired stamped document data (step S801).

Next, the confirmation module 222 calculates a value obtained by decrypting the "value obtained by encrypting the hash value of the imprint image" in the additional information in the "seal stamp information" with the encryption password (step S802).

Then, the confirmation module 222 compares the data between the value calculated in step S801 and the value calculated in step S802 (step S803).

If the data compared in step S803 match, the process proceeds to step S805 and the check is OK, and if the compared data do not match, the process proceeds to step S806 and the check is NG (step S804).

Finally, the confirmation module 222 notifies the user terminal 3 of the result of the check OK or the check NG (step S807).

The above is the imprint image hash value check process.

[Document data hash value check process]
The document data hash value check process will be described with reference to FIG. FIG. 9 is a diagram showing a flowchart of the document data hash value check process.

The document data hash value check process is performed when the confirmation module 222 of the server 2 compares whether or not the acquired collation data matches the collation data for predetermined authentication.

For example, when it is desired to confirm whether or not the document file has been modified when the imprinted document in the imprint image system 1 is sent as an attachment by e-mail, first, the confirmation module 222 sets the acquired imprinted document data. The hash value of the document file of is calculated (step S901).

Next, the confirmation module 222 calculates the value obtained by decrypting the "value obtained by encrypting the hash value of the document data" in the additional information of the imprint container with the encrypted password (step S902).

Then, the confirmation module 222 compares the data between the value calculated in step S901 and the value calculated in step S902 (step S903).

If the data compared in step S903 match, the process proceeds to step S905 and the check is OK, and if the compared data do not match, the process proceeds to step S906 and the check is NG (step S904). If the check is OK, it can be considered that the document file has not been modified after being stamped (step S905). If the check is NG, the document file can be considered to have been modified in some way after being stamped (step S906).

Finally, the confirmation module 222 notifies the user terminal 3 of the result of the check OK or the check NG (step S809).

The timing to add the encrypted hash value of the document data to the additional information in the imprint container can be set as needed, such as when the document file is updated after the imprint is inserted, not only during the imprint insertion process. May be good.

The above is the document data hash value check process.

[Collaboration processing using location information]
The collation process using the position information will be described. Position information such as GPS acquired from the device may be included as additional information when the imprint container is generated. The position information such as GPS may be acquired by using the function of the device used at the time of capturing the imprint image such as the user terminal 3 or the seal stamp scanner 5. When performing the imprint processing for imprinting the imprint image of the selected imprint container on the predetermined document data, is the position information at the time of the imprint processing and the position information of the additional information in the imprint container the same in the collation data acquisition module 321? It can be made possible to be stamped by the document-corresponding module 322 only when they are the same. The determination of whether they are the same may be adjustable depending on the system. By using the location information in this way, there is an advantage that it is possible to manage the location of the stamp, such as not being able to perform the stamp processing outside the company.

The above is the collation process using the position information.

[Collaboration processing using self-written information]
The collation process using the self-written information will be described. Information including stroke data such as stroke, writing order, pen pressure, movement speed, etc. of the self-written handwriting that is handwritten with a digital pen or fingertip on the tablet or touch panel when registering the imprint or inserting the imprint, and is for self-writing. Self-written information encrypted with a password may be included as additional information. Since this self-written information is information peculiar to the input person himself / herself, it is possible to further strengthen the association between the imprint image and the user himself / herself by storing the self-written information in the imprint container. Like the imprint image hash value, it can be used to ensure that the imprint container itself was created in a legitimate procedure. When encrypting the self-written information, a separate password different from the encrypted password shall be used as the self-written password. Further, the imprint image system 1 manages the self-written information as additional information for each user, so that the self-written information can be used as collation data for identity verification. Furthermore, by displaying the stroke of the "self-written information" decrypted with the password on a separate screen, it can also be used to visually confirm whether the user himself wrote the self-written information.

An example of collation processing using self-written information will be described. First, at the time of imprint registration, self-written information is added in the imprint container as additional information and collation data of the imprint container. The self-written information shall be individually encrypted with the self-written password. This is a measure to prevent unauthorized use by extracting data. Next, when the imprint is inserted, the user himself / herself inputs the handwriting and compares it with the self-written information in the imprint container to authenticate the person himself / herself. At the time of authentication, the above-mentioned self-written password is required. Here, only when the authentication is successful, it is considered that the collation data matches, and the imprint container is associated with the document file. At the time of imprint confirmation, the authenticity can be confirmed by comparing the self-written information at the time of creating the imprint container and the self-signed information at the time of inserting the imprint stored in the "seal information" of the stamped document data. .. Even when confirming the imprint, the above-mentioned self-written password is required for authentication.

The above is the collation process using the self-written information.

[Collation processing using face image]
The collation process using the face image will be described. When registering the imprint or inserting the imprint, the user's face image may be included as additional information. Since this face image is information peculiar to the input person himself / herself, it is possible to further strengthen the association between the imprint image and the user himself / herself by storing the face image in the imprint container. Like the imprint image hash value, it can be used to ensure that the imprint container itself was created in a legitimate procedure. Further, the imprint image system 1 manages the face image as additional information for each user, so that the face image can be used as collation data for identity verification.

An example of collation processing using a face image will be described. First, at the time of imprint registration, a face image is added in the imprint container as additional information and collation data of the imprint container. The face image shall be individually encrypted with the face image password. This is a measure to prevent unauthorized use by extracting data. Next, when the imprint is inserted, the user himself / herself takes a face image and compares it with the face image in the imprint container to perform face recognition as to whether or not he / she is the person himself / herself. At the time of authentication, the above-mentioned face image password is required. Here, only when the authentication is successful, it is considered that the collation data matches, and the imprint container is associated with the document file. At the time of imprint confirmation, the authenticity can be confirmed by comparing the face image at the time of generating the imprint container and the face image at the time of inserting the imprint stored in the "seal information" of the stamped document data. Even when confirming the imprint, the above-mentioned face image password is required for authentication.

The above is the collation process using the face image.

[Processing for using imprint image when using a dedicated device as the imprint container]
The imprint image utilization process when a dedicated device is used as the imprint container will be described. The imprint container is a container for "seal information". In the above, the case where electronic data is used as the imprint container has been described, but a dedicated device may be used as the imprint container. The dedicated device is a stamp-type device having an electronic content, such as a digitizer pen of a tablet terminal. The imprint image and additional information are stored in the dedicated device, and the imprint image and the additional information are associated with the document data by communicating between the dedicated device and the user terminal 3 at the time of imprint processing. At the time of imprint insertion processing, instead of the verification data acquisition module 321 authenticating with the encrypted password, the dedicated device is provided with biometric authentication functions such as fingerprint recognition and voice pattern recognition, face image recognition by the camera, etc., and the verification data is generated. It is possible to perform verification by acquiring it as authentication information for performing.

The above is the imprint image utilization process when a dedicated device is used as the imprint container.

[Input request information setting process]
The setting process of input request information will be described. The input request information is a process that enables the items that are required to be input when the seal is inserted to be set at the time of seal registration. Specifically, when the imprint container generation module 211 generates the imprint container in step S303 of FIG. 3, input request information is set as a flag for each additional information in the imprint container. When the flag is on, the input of the additional information is required when inserting the seal, and when the flag is off, the input is not required. When the flag is on, in step S306, the document correspondence module 322 requests the user to input the additional information. The document correspondence module 322 and the collation data acquisition module 321 may cooperate to perform a process of requesting the user to input the additional information.

FIG. 10 is an example of displaying a screen for making an input request when the flag of the input request information is on. Here, the case where the input request flag is turned on is shown for the self-written information of the additional information. If the input request flag is on, the input of the corresponding item is requested before inserting the seal. In order to request the input of the self-written information, the document support module 322 displays the self-written information input screen 1001 on the user terminal 3. The self-written information input screen 1001 includes a self-written information input area 1002 in which a user can input a self-written information. The self-written information input area 1002 is input via the input unit 350 of the user terminal 3. Further, the self-written information input screen 1001 may be provided with a clear button 1003, a next button 1004, a cancel button 1005, and the like. The clear button 1003 is a button for erasing the input self-written document. The next button 1004 is a button for confirming the input self-written document and proceeding to the next process. Next, when the button 1004 is selected, the process proceeds to a process (corresponding to step S307) for comparing the input self-written information as collation data. When the comparison results match, the seal can be inserted, so the imprint container and the document are associated (step S308). The cancel button 1005 is a button for canceling the input itself of the self-written document. When the cancel button 1005 is selected, the screen may shift to a screen for confirming whether or not to continue the stamp insertion process itself.

Here, the case where the input request flag of the self-written information is on is described, but when the self-written information is in the imprint container, the seal is stamped regardless of whether the input request flag is turned on or off or the input request flag is present. It may be mandatory to enter self-written information at the time of insertion.

The above is the setting process of the input request information.

Although it is described that each module of the server 2 or the user terminal 3 executes each process in each of the above-mentioned processes, the application installed on the user terminal 3 may execute each process. In this case, it is sufficient that this application has the same function as each module described above.

The above-mentioned means and functions are realized by a computer (including a CPU, an information processing device, and various terminals) reading and executing a predetermined program. The program is provided, for example, in the form of being provided via a network from one or more computers (Cloud Service, SaaS: Software as a Service). The program is also provided, for example, in the form of being recorded on a computer-readable recording medium. In this case, the computer reads the program from the recording medium, transfers the program to the internal recording device or the external recording device, records the program, and executes the program. Further, the program may be recorded in advance on a recording device (recording medium) such as a magnetic disk, an optical disk, or a magneto-optical disk, and provided from the recording device to a computer via a communication line.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments described above. In addition, the effects described in the embodiments of the present invention merely list the most preferable effects arising from the present invention, and the effects according to the present invention are limited to those described in the embodiments of the present invention. is not it.

1 Imprint image system, 2 servers, 3 user terminals, 4 seals, 5 seal scanners, 6 communication networks

Claims (11)

It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching a hash value of an imprint image to the imprint container as verification data for authentication, and
A collation data acquisition means for generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Document correspondence means to associate with document data,
A confirmation means for confirming the imprint image of the predetermined document data with additional information about a user who uses the imprint image and additional information about the imprint image including a hash value of the imprint image.
Imprint image system equipped with. It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching self-written information to the imprint container as collation data for authentication,
A collation data acquisition means for acquiring the self-written information from the imprint container that has been selected to use the imprint image, and
When the self-written information of the imprint container and the self-written information acquired at the time of document correspondence are compared and matched, the imprint image of the container accepting the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document. Document correspondence means to associate with the document data of
A confirmation means for confirming the imprint image of the predetermined document data with additional information about the user who uses the imprint image and additional information about the imprint image including the self-written information.
Imprint image system equipped with. It is an imprint image system for using imprint images.
An imprint container generation means for generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A collation data assigning means for attaching a face image to the imprint container as collation data for authentication, and
A collation data acquisition means for acquiring the face image from the imprint container that has been selected to use the imprint image, and
When the face image of the imprint container and the face image acquired at the time of document correspondence are compared and matched, the imprint image of the container that accepts the selection is stamped on the predetermined document data, and the imprint container is used for the predetermined document. Document correspondence means to associate with data,
A confirmation means for confirming the imprint image of the predetermined document data with additional information regarding the user who uses the imprint image and additional information regarding the imprint image including the face image.
Imprint image system equipped with. The additional information about the imprint image includes the hash value of the imprint image.
When the hash value of the imprint image matches the hash value generated from the imprint image to be imprinted , the document-corresponding means imprints the imprint image of the container that has accepted the selection on the predetermined document data, and imprints the imprint. The imprint image system according to claim 1 , wherein the container is associated with predetermined document data. The imprint image system according to any one of claims 1 to 4, wherein the confirmation means includes additional information display means for displaying additional information regarding the user and additional information regarding the imprint image. The additional information about the imprint image includes the hash value of the imprint image.
The confirmation means confirms the imprint image of the predetermined document data with additional information about the imprint image.
Claim 1 for confirming the authenticity of the imprint image of the predetermined document data by comparing the hash value of the imprint image stored in the imprint container with the hash value generated from the imprint image of the predetermined document data. The imprint image system according to any one of claims 5. When the imprint container is associated with the predetermined document data, the document-corresponding means stores the information stored in the imprint container in the predetermined document data, and then stores the hash value of the predetermined document data in the predetermined document data. Stored in the document data of
The confirmation means further requests to confirm the authenticity of the predetermined document data by comparing the hash value of the document data stored in the predetermined document data with the hash value generated from the predetermined document data. The imprint image system according to any one of items 1 to 6. The imprint image system according to any one of claims 1 to 7, wherein the imprint container is electronic data in which seal stamp information is stored or a dedicated device. The imprint container generation means sets a flag of input request information for each additional information in the imprint container, and sets a flag.
The imprint image system according to any one of claims 1 to 8, wherein the document-corresponding means requests the user to input the additional information when the input request information flag is on. It is an imprint image method for using the imprint image.
A step of generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A step of attaching the hash value of the imprint image to the imprint container as verification data for authentication, and
A step of generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Steps to associate with document data and
A step of confirming the imprint image of the predetermined document data with additional information about the user who uses the imprint image and additional information about the imprint image including the hash value of the imprint image, and
Imprint image method comprising. For the imprint image system for using the imprint image,
A step of generating an imprint container in which additional information about a user who uses the imprint image and additional information about the imprint image are associated with the imprint image.
A step of attaching a hash value of an imprint image to the imprint container as verification data for authentication.
A step of generating and acquiring a hash value of the imprint image of the imprint container that has accepted the selection for the imprint container that has accepted the selection to use the imprint image.
When the hash value of the generated imprint image matches the hash value at the time of generation of the imprint container, the imprint image of the container that has accepted the selection is stamped on the predetermined document data, and the imprint container is placed on the predetermined document data. Steps to associate with document data ,
A step of confirming an imprint image of the predetermined document data with additional information about a user who uses the imprint image and additional information about the imprint image including a hash value of the imprint image.
A program to execute.

Images