WO2023002748A1

WO2023002748A1 - Document management server, document management method, and computer program

Info

Publication number: WO2023002748A1
Application number: PCT/JP2022/021282
Authority: WO
Inventors: 康幸日下
Original assignee: アストロラボ株式会社
Priority date: 2021-07-21
Filing date: 2022-05-24
Publication date: 2023-01-26
Also published as: JP2023016373A

Abstract

This document management server comprises: a first reception unit that receives text data from a document; a first division unit that divides the received text data and acquires a plurality of words; a first encryption unit that encrypts each of the plurality of acquired words; a registration unit that registers each of the plurality of encrypted words in a document index; a processing unit that associates the document and the document index in which each of the plurality of encrypted words is registered and stores the result as document data in a storage unit; a second reception unit that receives a character string for a search; a second division unit that divides the received character string for a search and acquires one or a plurality of words; a second encryption unit that encrypts each of the one or more acquired words; and a search unit that searches a plurality of pieces of document data on the basis of each of the one or more encrypted words.

Description

Document management server, document management method and computer program

The present invention relates to a document management server, document management method, and computer program.
This application claims priority based on Japanese Patent Application No. 2021-120640 filed in Japan on July 21, 2021, the contents of which are incorporated herein.

For example, the contract is exchanged as follows. After agreeing on the contents of the contract between the contractors, one contractor prepares two copies of the contract, signs them, and sends them to the other contractor. When the other contracting party receives the contract, he/she signs both copies, keeps one copy as evidence, and returns the other copy to the other contracting party. In this case, the contract that is kept on hand as evidence is stored and managed in a document shelf.

Regarding techniques for managing documents such as contracts, techniques for efficiently and reliably managing documents are known (see Patent Document 1, for example). According to this technique, the document management apparatus includes a document information acquisition unit, a container information acquisition unit, a document input/output information recording unit, a processing status determination unit, a processing status information output unit, and a document input/output information management DB. Prepare. The document information acquisition unit acquires information on a predetermined document. The container information acquisition unit acquires information about a predetermined container. The document entry/exit information recording section records information relating to entry/exit of documents in a predetermined recording medium. The processing status determination unit determines the processing status of a given document. The processing status information output unit outputs information about the processing status of the document.

Japanese Patent Application Laid-Open No. 2007-265280

When contracts are stored in a document shelf, it is difficult to find the desired contract from the bundle of contracts in the document shelf. In addition, when it becomes necessary to confirm the contract, the employee must come to the office to confirm the contract. In addition, it is not possible to review contracts that are managed at remote locations such as overseas branch offices. If a defect is discovered in a certain contract and the user wants to refer to the same contract, it is difficult to find the contract from the bundle of contracts stored in the document shelf.

Also, even if there is an unfavorable contract, there is no opportunity to review the contract, so there is a risk that the contract will automatically be renewed. If there is a contract that needs to be reviewed, it is necessary to keep the contract at hand, so the storage location cannot be moved to the warehouse.
When the contract is converted into electronic data and stored, it is difficult to scan the bound contract. The use of paper documents and multiple electronic contract services may lead to disjointed management. The above applies to documents such as contracts.
SUMMARY OF THE INVENTION An object of the present invention is to provide a document management server, a document management method, and a computer program that can improve the convenience of document management.

(1) One aspect of the present invention includes: a first receiving unit that receives text data of a document; a first dividing unit that divides the text data received by the first receiving unit to obtain a plurality of words; a first encryption unit for encrypting each of the plurality of words obtained by the first division unit; and a registration for registering each of the plurality of words encrypted by the first encryption unit in an index of the document. a processing unit that associates the index of the document in which each of the plurality of words encrypted by the registration unit is registered with the document and stores the document as document data in a storage unit; a second receiving unit that receives, a second dividing unit that divides the search character string received by the second receiving unit to obtain one or more words, and one or more words that the second dividing unit obtains a second encryption unit that encrypts each of the words; and a search unit that searches for a plurality of the document data based on each of the one or more words encrypted by the second encryption unit. , is a document management server.
(2) In one aspect of the present invention, in the document management server according to (1) above, the first dividing unit converts a character string included in each of the plurality of words into a predetermined format, 1 encryption unit encrypts the character string converted into the predetermined format by the first division unit.
(3) In one aspect of the present invention, in the document management server according to (1) or (2) above, the first reception unit receives one or more predetermined items included in the text data of the document. the first encryption unit encrypts each of the one or more predetermined items extracted by the first reception unit; and the registration unit encrypts the one or more predetermined items. The result is registered in the index of the document, and the processing unit associates the document with the index of the document in which the result of encrypting one or more predetermined items by the registration unit is further registered to the document. It is stored in the storage unit as data.
(4) In one aspect of the present invention, in the document management server according to any one of (1) to (3) above, the registration unit arranges the words in the order of the plurality of words included in the text data. Based on this, each of the plurality of words encrypted by the first encryption unit is registered in the index of the document.
(5) In one aspect of the present invention, in the document management server according to any one of (1) to (4) above, the first encryption unit stores a plurality of Among the words, words corresponding to a predetermined part of speech are encrypted.
(6) In one aspect of the present invention, in the document management server according to any one of (1) to (5) above, the search unit is encrypted by the second encryption unit. Each of the plurality of words is searched for a match of the plurality of encrypted words contained in each of the indices of the plurality of documents.
(7) In one aspect of the present invention, in the document management server according to any one of (1) to (6) above, the search unit is encrypted by the second encryption unit or Deriving a match rate between each of the plurality of words and the encrypted plurality of words contained in each of the indices of the plurality of documents.

(8) An aspect of the present invention is a document management method executed by a document management server, comprising: receiving text data of a document; dividing the text data to obtain a plurality of words; encrypting each of said words; registering each of said plurality of words encrypted in said step of encrypting in said document index; and registering each of said plurality of encrypted words. a step of associating the index of the document obtained with the document and storing it in a storage unit as document data; a step of receiving a character string for search; dividing the character string for search and acquiring one or more words; encrypting each of the one or more words obtained by dividing the search string; and based on each of the one or more words obtained by dividing the encrypted search string, a plurality of and retrieving the document data of the document management method.

(9) One aspect of the present invention provides a computer with the steps of receiving text data of a document, dividing the text data to obtain a plurality of words, and encrypting each of the plurality of words. registering each of the plurality of words encrypted in the step of encrypting in an index of the document; and the index of the document and the document in which each of the plurality of encrypted words is registered. a step of associating and storing in a storage unit as document data; a step of receiving a search character string; a step of dividing the search character string to obtain one or more words; encrypting each of the divided one or more words; and searching the plurality of document data based on each of the one or more divided words of the encrypted search character string. A computer program that is executed.

According to the present invention, it is possible to provide a document management server, a document management method, and a computer program that can improve the convenience of document management.

1 is a diagram showing a configuration example of a document management system according to an embodiment of the present invention; FIG. 3 is a diagram showing details of a document management server and terminal devices included in the document management system according to the embodiment; FIG. FIG. 4 is a diagram showing an example 1 of operation of the document management system according to the present embodiment; FIG. 4 is a diagram showing an example 1 of a document management request screen displayed by the terminal device according to the embodiment; FIG. 10 is a diagram showing an example 2 of a document management request screen displayed by the terminal device according to the embodiment; FIG. 10 is a diagram showing an example 3 of a document management request screen displayed by the terminal device according to the embodiment; This is for explaining document scanning processing by the terminal device according to the present embodiment. FIG. 4 is a diagram showing an example 1 of information displayed on the terminal device according to the embodiment; It is a figure which shows the example 2 of the information displayed on the terminal device which concerns on this embodiment. FIG. 10 is a diagram showing an example 2 of the operation of the document management system according to this embodiment; FIG. 4 is a diagram showing an example 1 of information displayed on the terminal device according to the embodiment; It is a figure which shows the example 2 of the information displayed on the terminal device which concerns on this embodiment.

Next, the document management server, document management method, and computer program of this embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and embodiments to which the present invention is applied are not limited to the following embodiments.
In addition, in all the drawings for explaining the embodiments, the same reference numerals are used for the parts having the same functions, and repeated explanations are omitted.
In addition, "based on XX" in the present application means "based on at least XX", and includes cases based on other elements in addition to XX. Moreover, "based on XX" is not limited to the case of using XX directly, but also includes the case of being based on what has been calculated or processed with respect to XX. "XX" is an arbitrary element (for example, arbitrary information).

(First embodiment)
(Document management system)
FIG. 1 is a diagram showing a configuration example of a document management system according to an embodiment of the present invention. In FIG. 1, the document management system 1 has a document management server 100 . In addition to the document management server 100, FIG. 1 shows a terminal device 200 used by a customer such as a user U who requests document management.
The document management server 100 and the terminal device 200 communicate via the network NW. The network NW includes, for example, the Internet, a WAN (Wide Area Network), a LAN (Local Area Network), a provider device, a radio base station, and the like.

A user U who requests document management is registered in the document management system 1 , and user identification information (hereinafter referred to as “user ID”) and password are set in the document management system 1 . A user U accesses the document management server 100 by operating the terminal device 200 . The user U logs into the document management system 1 by entering a user ID and a password into the terminal device 200 and performing a login operation. The user U refers to the initial screen of the document management system 1 and presses the document management request button to display the document management request screen on the terminal device 200 . An example of a document is a contract. As an example, the description will be continued below for the case where the document is a contract.
The user U operates the terminal device 200 to enter document-related items such as the title and contract type on the document management request screen. A user U scans a document by operating the terminal device 200 . The terminal device 200 creates a document management request addressed to the document management server 100, which includes a user ID, document-related items, and document scan data. The terminal device 200 transmits the created document management request to the document management server 100 .

The document management server 100 receives the document management request transmitted by the terminal device 200 . The document management server 100 acquires the user ID, document-related items, and document scan data included in the received document management request. The document management server 100 creates information (hereinafter referred to as “document identification information”) that uniquely identifies the acquired document-related matters and the scan data of the document.
The document management server 100 converts the scanned data of the acquired document into text data by processing it. The document management server 100 extracts one or more predetermined items such as a title included in the document based on the text data of the document. The document management server 100 encrypts the obtained one or more predetermined items.
The document management server 100 obtains one or more words by dividing the character string included in the document based on the text data of the document. The document management server 100 performs a process of aligning the display formats of alphanumeric characters contained in each of the acquired one or more words. Specifically, the document management server 100 may align the display format of alphanumeric characters included in each of one or more words to full-width or half-width.

The document management server 100 performs a process of aligning the expressions of alphabetic characters included in each of the acquired one or more words. Specifically, the document management server 100 may align the representation format of the alphabetic characters included in each of one or more words to lowercase letters or uppercase letters. As an example, a case where the document management server 100 converts the representation format of alphanumeric characters contained in each of one or more words into half-width characters and converts the representation format of alphabetic characters into lowercase letters will be continued.
The document management server 100 converts the display format of alphanumeric characters into half-width characters and converts the representation format of alphabetic characters into lowercase letters, and encrypts each of one or more words. The document management server 100 registers one or more encrypted predetermined items in a document index (index, headline) in order of appearance. The document management server 100 registers each of the one or more encrypted words in the document index (index, headline) in order of appearance.

The document management server 100 has a user ID, document identification information, a document index in which each of one or more encrypted predetermined items and each of one or more encrypted words are registered, The data is stored in the storage unit in association with the scan data of the document. The document management server 100 creates a document management response addressed to the terminal device 200 and including information indicating that document management has started. The document management server 100 transmits the created document management response to the terminal device 200 .

The terminal device 200 receives the document management response sent by the document management server 100 . The terminal device 200 acquires information indicating that management of the document contained in the received document management response has started. The terminal device 200 displays information indicating that management of the acquired document has started.
A user U requesting a document search accesses the document management server 100 by operating the terminal device 200 . The user U logs into the document management system 1 by entering a user ID and a password into the terminal device 200 and performing a login operation.
The user U refers to the initial screen of the document management system 1 and pushes the document search request button to display the document search request screen on the terminal device 200 . The user U operates the terminal device 200 to input a search character string such as a search keyword on the document search request screen and press the OK button. The terminal device 200 creates a document search request addressed to the document management server 100, which includes the user ID and information specifying the search character string. The terminal device 200 transmits the created document search request to the document management server 100 .

The document management server 100 receives the document search request sent by the terminal device 200 . The document management server 100 acquires the user ID and the information specifying the search character string included in the received document search request. Based on the text data of the search character string, the document management server 100 obtains one or more words by dividing the character string included in the search character string. The document management server 100 performs a process of aligning the display formats of alphanumeric characters contained in each of the acquired one or more words. Specifically, the document management server 100 may align the display format of alphanumeric characters included in each of one or more words to full-width or half-width.
The document management server 100 performs a process of aligning the expressions of alphabetic characters included in each of the acquired one or more words. Specifically, the document management server 100 may align the representation format of the alphabetic characters included in each of one or more words to lowercase letters or uppercase letters. As an example, a case where the document management server 100 converts the representation format of alphanumeric characters contained in each of one or more words into half-width characters and converts the representation format of alphabetic characters into lowercase letters will be continued.
The document management server 100 converts the display format of alphanumeric characters into half-width characters and converts the representation format of alphabetic characters into lowercase letters, and encrypts each of one or more words.

The document management server 100 searches for a document index containing one or more encrypted words from among one or more document indexes stored in the storage unit in association with the acquired user ID. . The document management server 100 retrieves one or more indexes of documents containing either one or more of the encrypted words by searching. The document management server 100 rearranges the indexes of the obtained one or more documents in descending order of matching rate of one or more encrypted words. The document management server 100 acquires document identification information associated with each of the rearranged one or more document indexes. The document management server 100 creates a document search response addressed to the terminal device 200 including one or more pieces of acquired document identification information. The document management server 100 transmits the created document search response to the terminal device 200 .

The terminal device 200 receives the document search response sent by the document management server 100 . The terminal device 200 acquires one or more pieces of document identification information included in the received document search response. The terminal device 200 displays the acquired one or more pieces of document specifying information.
The user U refers to one or a plurality of pieces of document specifying information displayed on the terminal device 200, and selects a document to be browsed by pressing a portion corresponding to the document specifying information to be browsed. The terminal device 200 creates a document request addressed to the document management server 100, including the document identification information corresponding to the part pressed by the user U. FIG. The document management server 100 transmits the created document request to the document management server 100 .

The document management server 100 receives the document request sent by the terminal device 200 . The document management server 100 acquires document specifying information included in the received document request. The document management server 100 acquires document scan data and document text data stored in association with the acquired document specifying information. The document management server 100 obtains one or more words by dividing the character string included in the document based on the text data of the obtained document. The document management server 100 extracts document-related matters based on predetermined rules such as the format of each of the acquired one or more words and the arrangement of parts of speech. The document management server 100 creates a document response destined for the terminal device 200, which includes the acquired scan data of the document, text data of the document, and document-related items. The document management server 100 transmits the created document response to the terminal device 200 .
The terminal device 200 receives the document response sent by the document management server 100 . The terminal device 200 acquires the document scan data, the document text data, and the document-related items included in the received document response. The terminal device 200 displays the selected one of the acquired scan data of the document, text data of the document, and document-related items.

The document management server 100 and the terminal device 200 included in the document management system 1 will be sequentially described below.
FIG. 2 is a diagram showing the details of the document management server and the terminal device included in the document management system according to this embodiment.
(Document management server 100)
The document management server 100 is implemented by a device such as a personal computer, server, smart phone, tablet computer, or industrial computer. The document management server 100 may be a cloud server.
The document management server 100 includes, for example, a conversion unit 101, a communication unit 102, a first reception unit 103-1, a second reception unit 103-2, a first division unit 104-1, a second division unit 104 -2, a first encryption unit 105-1, a second encryption unit 105-2, a registration unit 106, a processing unit 107, a search unit 108, and a creation unit 110.

The communication unit 102 is implemented by a communication module. The communication unit 102 communicates with an external communication device via the network NW. The communication unit 102 may communicate using a communication method such as a wired LAN, for example. Further, the communication unit 102 may communicate by a wireless communication method such as a wireless LAN, Bluetooth (registered trademark), or LTE (registered trademark). The communication unit 102 holds communication information necessary for communicating with the terminal device 200 via the network NW.
The communication unit 102 receives the login request, the document management request, the document search request, and the document request transmitted by the terminal device 200 . The communication unit 102 acquires the login response, the document management response, the document search response, and the document response output by the creation unit 110, and transmits the acquired document management response, document search response, and document response to the terminal. Send to device 200 .

The storage unit 109 is implemented by a HDD (Hard Disk Drive), flash memory, RAM (Random Access Memory), ROM (Read Only Memory), or the like. The storage unit 109 stores one or more user IDs and passwords for each of the one or more user IDs in association with each other.
The processing unit 107 acquires the user ID and password included in the login request received by the communication unit 102 . The processing unit 107 determines that the login is successful when the acquired combination of the user ID and password is registered in advance in the storage unit 109, and determines that the login is unsuccessful when the combination is not registered.
The creating unit 110 creates a login response addressed to the terminal device 200 including an initial screen when the processing unit 107 determines that the login is successful. The processing unit 107 outputs the created login response to the communication unit 102 .
The conversion unit 101 acquires the document management request received by the communication unit 102 . The conversion unit 101 acquires the user ID and the document scan data included in the acquired document management request. The conversion unit 101 converts the acquired scan data of the document into text data of the document. For example, the conversion unit 101 uses optical character recognition (OCR) technology to convert images of printed characters and handwritten characters included in document scan data into character code strings.

The first reception unit 103-1 acquires the document management request received by the communication unit 102. The first reception unit 103-1 receives the user ID, document-related items, and document scan data included in the acquired document management request. The first reception unit 103-1 creates document identification information that uniquely identifies the acquired document-related matters and the scan data of the document. The first reception unit 103-1 acquires from the conversion unit 101 the text data of the document corresponding to the user ID included in the acquired document management request. First accepting unit 103-1 accepts the acquired user ID and the text data of the document. The first receiving unit 103-1 extracts one or a plurality of predetermined items such as a title included in the document based on the text data of the received document.

First dividing unit 104-1 acquires the user ID and text data of the document accepted by first accepting unit 103-1. The first dividing unit 104-1 obtains one or more words by dividing the character string included in the document based on the text data of the obtained document. For example, the first dividing unit 104-1 divides a character string included in a document into morphemes by morphologically analyzing the text data of the document.
In morphological analysis, natural language text data (sentences) without grammatical information notes are divided into strings of morphemes based on information such as the grammar of the target language and the parts of speech of words called a dictionary. It is to discriminate the part of speech of the morpheme. A morpheme is the smallest unit of a meaningful expression element. A morpheme refers to each group of phonemes that are separated and extracted to the point where they become meaningless when further broken down in a certain language.
The first dividing unit 104-1 converts the display format of alphanumeric characters contained in each of the acquired one or more words into single-byte characters, and converts the representation format of alphabetic characters into lowercase letters.

First encryption unit 105-1 acquires from first division unit 104-1 the user ID and one or more words obtained by converting the display format of alphanumeric characters into half-size characters and converting the representation format of alphabetic characters into lowercase letters. . First encryption unit 105-1 acquires one or more predetermined items such as a title included in the document corresponding to the acquired user ID from first reception unit 103-1. The first encryption unit 105-1 converts the display format of the acquired alphanumeric characters to half-size characters, converts the expression format of the alphabetic characters to lower case letters, and converts each of one or more words to one or more predetermined items. Encrypt. For example, the first encryption unit 105-1 uses the Advanced Encryption Standard algorithm to convert one or more predetermined items and alphanumeric display format into half-width characters, are converted to lowercase and perform encryption of each of the one or more words.
The registration unit 106 converts the result of encrypting the user ID and one or more predetermined items from the first encryption unit 105-1, the display format of alphanumeric characters into single-byte characters, and the representation format of alphabetic characters into lowercase letters. and obtaining a result of encrypting each of the one or more words obtained. The registration unit 106 encrypts each of the results obtained by encrypting one or more predetermined items and one or more words obtained by converting the display format of alphanumeric characters into half-width characters and converting the representation format of alphabetic characters into lowercase letters. index the document in order of appearance.

The processing unit 107 converts the user ID and one or more predetermined items from the registration unit 106 into encrypted data, converts the display format of alphanumeric characters to half size, and converts the representation format of alphabetic characters to lower case. Get the index of the document that registered the result of encrypting each of the words. The processing unit 107 acquires document identification information corresponding to the acquired user ID and scan data of the document. The processing unit 107 converts the obtained user ID, the document identification information, the result of encrypting one or a plurality of predetermined items, and the alphanumeric display format to half-size, and converts the alphabetic representation format to lowercase. The index of the document in which the result of encrypting each of one or more words and the scanned data of the document are associated with each other and stored in the storage unit 109 .
The creation unit 110 converts the user ID, the document identification information, the result of the encryption of one or more predetermined items by the processing unit 107, and the alphanumeric display format into single-byte characters, and converts the alphabetic representation format into lowercase letters. Information indicating that management of the document is started after the index of the document in which the result of encrypting each of the converted one or more words is registered and the scanned data of the document are associated with each other and stored in the storage unit 109. A document management response addressed to the terminal device 200 is created. Creation unit 110 outputs the created document management response to communication unit 102 .

The second reception unit 103-2 acquires the document search request received by the communication unit 102. FIG. The second reception unit 103-2 receives information specifying the user ID and search character string included in the acquired document search request.
Second dividing unit 104-2 acquires the user ID and the text data of the search character string accepted by second accepting unit 103-2. The second dividing unit 104-2 obtains one or more words by dividing the character string included in the search character string based on the obtained text data of the search character string. For example, the second dividing unit 104-2 divides the character string included in the search character string into morphemes by morphologically analyzing the text data of the search character string.
The second dividing unit 104-2 converts the representation format of alphanumeric characters contained in each of the acquired one or more words into half-width characters, and converts the representation format of alphabetic characters into lowercase letters.

Second encryption unit 105-2 converts the display format of alphanumeric characters from second division unit 104-2 to the user ID and search character string, converts the display format of alphanumeric characters to half size, and converts the representation format of alphabetic characters to lower case. Or get multiple words. The second encryption unit 105-2 encrypts each of one or a plurality of words included in the obtained search character string, converted from alphanumeric display format to half-size, and from alphabetic representation format to lowercase. do. For example, the second encryption unit 105-2 is included in the search character string using the Advanced Encryption Standard algorithm, converts the display format of alphanumeric characters to half size, and converts the representation format of alphabets to lower case. Perform encryption of each of the multiple words.

Search unit 108 acquires the user ID and the result of encrypting each of the one or more words from second encryption unit 105-2. The search unit 108 retrieves an index of a document that includes one or more of the results of encrypting one or more words obtained from among one or more document indexes stored in the storage unit 109 in association with the obtained user ID. Search for The search unit 108 obtains one or more indexes of documents including any of the results of encrypting one or more words by searching.
The search unit 108 rearranges the obtained indexes of the one or more documents in descending order of the matching rate of the encrypted one or more words. The search unit 108 acquires document identification information associated with each of the rearranged indexes of one or more documents.
The creation unit 110 creates a document search response addressed to the terminal device 200 and including one or more pieces of document identification information acquired by the search unit 108 . The document management server 100 outputs the created document search response to the communication unit 102 .

The processing unit 107 acquires the document request received by the communication unit 102 . The processing unit 107 acquires document specifying information included in the acquired document request. The processing unit 107 acquires from the storage unit 109 the scan data of the document and the text data of the document stored in association with the acquired document specifying information. The processing unit 107 obtains one or more words by dividing the character string included in the document based on the text data of the obtained document. The processing unit 107 extracts document-related matters based on predetermined rules such as the format of each of the acquired one or more words and the arrangement of parts of speech.
The creation unit 110 acquires the document scan data and the document text data acquired by the processing unit 107, and the extracted document-related items. The preparation unit 110 prepares a document response destined for the terminal device 200 including the acquired scan data of the document, the text data of the document, and the extracted document-related items. The document management server 100 outputs the created document response to the communication unit 102 .

Conversion unit 101, first reception unit 103-1, second reception unit 103-2, first division unit 104-1, second division unit 104-2, first encryption unit 105-1, second encryption unit 105-2, the registration unit 106, the processing unit 107, the search unit 108, and the creation unit 110 execute a computer program (software) stored in the storage unit 109 by a hardware processor such as a CPU (Central Processing Unit). It is realized by
Some or all of these functional units are hardware (circuits) such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), GPU (Graphics Processing Unit) (including circuitry), or by cooperation between software and hardware. The computer program may be stored in advance in a storage device such as a HDD (Hard Disk Drive) or flash memory, or may be stored in a removable storage medium such as a DVD or CD-ROM, and the storage medium may be a drive device. may be installed by being attached to the

(Terminal device 200)
The terminal device 200 is realized as a smart phone, a mobile terminal, a personal computer, a tablet terminal device, a wristwatch type terminal device, or other information processing equipment.
The terminal device 200 includes, for example, a display unit 201, a communication unit 202, an imaging unit 203, a creation unit 206, an operation detection unit 207, a display processing unit 208, and a storage unit 209.
The display unit 201 displays the screen output by the display processing unit 208 . Specifically, the display unit 201 displays an initial screen output by the display processing unit 208, a document management request screen, information indicating the start of document management, one or more pieces of document identification information, document scan data, and the like. indicate.
The imaging unit 203 scans a document and converts the document into digital still image information to create scan data of the document.

The communication unit 202 is implemented by a communication module. The communication unit 202 communicates with other devices such as the document management server 100 via the network NW. The communication unit 202 may communicate using a wireless communication method, for example. Also, the communication unit 202 may communicate using a communication method such as a wired LAN. Specifically, the communication unit 202 transmits the document management request, the document search request, and the document request output by the creation unit 206 to the document management server 100 . The communication unit 202 receives the document management response, the document search response, and the document response transmitted by the document management server 100 .

The operation detection unit 207 is configured by, for example, a touch panel or the like, detects a touch operation on the screen displayed on the display unit 201 , and outputs the detection result of the touch operation to the creation unit 206 . Touch operations include an operation of inputting a user ID and password, an operation of inputting items related to documents, an operation of pressing a document management request button, an operation of pressing a document search request button, an operation of inputting a search character string, and an OK button. This includes an operation of pressing , an operation of pressing a portion corresponding to the document specifying information to be browsed, and the like.
The storage unit 209 is implemented by, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, or a hybrid storage device in which a plurality of these are combined.

A creation unit 206 creates a login request for logging into the document management system 1 . Specifically, when the creation unit 206 acquires a detection result of an operation of inputting a user ID and a password from the operation detection unit 207, the creation unit 206 generates a log-in information including the user ID and the password whose destination is the document management server 100. create a request; Creation unit 206 outputs the created login request to communication unit 202 .
The display processing unit 208 causes the display unit 201 to display an initial screen when the terminal device 200 logs in to the document management system 1 . The initial screen includes a document management request button that is pressed when requesting document management, and a document search request button that is pressed when requesting document retrieval.

The creating unit 206 creates a document management request for requesting the document management system 1 to manage documents. Specifically, the creation unit 206 receives the detection result of the operation of pressing the document management request button from the operation detection unit 207 and the detection result of the operation of inputting the document-related items. The creation unit 206 acquires document scan data from the imaging unit 203 when the user U performs an operation to scan the document. The creation unit 206 creates a document management request addressed to the document management server 100, which includes a user ID, document-related items, and document scan data. The creation unit 206 outputs the created document management request to the communication unit 202 .

The display processing unit 208 acquires information indicating that management of the document contained in the document management response received by the communication unit 202 has started. The display processing unit 208 causes the display unit 201 to display information indicating that management of the acquired document has started.
The creation unit 206 creates a document search request for requesting the document management system 1 to search for documents. Specifically, the creation unit 206 receives the detection result of the operation of pressing the document search request button from the operation detection unit 207, receives the detection result of the operation of inputting a search character string, and receives the detection result of the operation of pressing the OK button. When the detection result is input, a document search request addressed to the document management server 100 and including the user ID and information specifying the search character string is created. The creation unit 206 outputs the created document search request to the communication unit 202 .

The display processing unit 208 acquires one or more pieces of document identification information included in the document search response received by the communication unit 202 . The display processing unit 208 causes the display unit 201 to display one or more pieces of acquired document specifying information.
A creation unit 206 creates a document request for requesting a document from the document management system 1 . Specifically, when the operation detecting unit 207 inputs a detection result of an operation of pressing a portion corresponding to the document specifying information to be browsed, the creation unit 206 detects the document specifying information corresponding to the portion pressed by the user U. A document request addressed to the document management server 100 is created. The creation unit 206 outputs the created document request to the communication unit 202 .

The display processing unit 208 acquires the document scan data, the document text data, and the document-related items included in the document response received by the communication unit 202 . The display processing unit 208 causes the display unit 201 to display the selected one of the acquired scan data of the document, text data of the document, and document-related items.

All or part of the creation unit 206, the operation detection unit 207, and the display processing unit 208 are functional units realized by a processor such as a CPU executing a program stored in the storage unit 209 (hereinafter , software functions). All or part of these functional units may be implemented by hardware such as LSI, ASIC, or FPGA, or may be implemented by a combination of software functional units and hardware. The computer program may be stored in advance in a storage device such as an HDD or flash memory, or may be stored in a removable storage medium such as a DVD or CD-ROM, and the storage medium may be loaded into a drive device. may be installed with

(Operation of document management system 1)
FIG. 3 is a diagram showing Example 1 of the operation of the document management system according to this embodiment. Processing for registering a document in the document management server 100 will be described with reference to FIG.
(Step S1-1)
Between the terminal device 200 and the document management server 100, processing is performed for the terminal device 200 to log in to the document management system 1. FIG. Here, the explanation will be continued for the case where the terminal device 200 has successfully logged into the document management system 1 . When the terminal device 200 fails to log in to the document management system 1, predetermined error processing is performed.

(Step S2-1)
In the terminal device 200 , the display processing section 208 causes the display section 201 to display an initial screen when the terminal device 200 logs in to the document management system 1 . The display processing unit 208 causes the display unit 201 to display the document management request screen when the detection result of the operation of pressing the document management request button is input from the operation detection unit 207 .
FIG. 4 is a diagram showing an example 1 of the document management request screen displayed by the terminal device according to the present embodiment. As shown in FIG. 4, the document request screen includes a field for entering the title of the document, a pull-down menu for selecting the type of contract, and radio buttons for selecting whether to enter in the Western calendar or the Japanese calendar. , and fields for entering the execution date, issue date, and expiration date. For example, the contract type can be selected from a pull-down menu. The conclusion date, issue date, and expiration date can be entered directly or selected from the calendar.

FIG. 5 is a diagram showing an example 2 of the document management request screen displayed by the terminal device according to the present embodiment. FIG. 5 shows a continuation of the document management request screen displayed by sliding the document management request screen shown in FIG. 4 in the vertical direction (downward). As shown in FIG. 5, the document request screen includes a pull-down menu for entering or selecting the contractor (company name, trade name, individual name) and a field for entering the name of the person in charge. . For example, the contractor can enter directly or select from a pull-down menu.
FIG. 6 is a diagram showing an example 3 of the document management request screen displayed by the terminal device according to the present embodiment. FIG. 6 shows a continuation of the document management request screen displayed by further sliding the document management request screen shown in FIG. 5 in the vertical direction (downward). As shown in FIG. 6, the document request screen includes buttons for selecting whether to photograph the latest contract and non-disclosure agreement with a camera or to select from photographs. Returning to FIG. 3, the description is continued.
The creation unit 206 acquires the detection result of the operation of inputting the document-related item from the operation detection unit 207 .

(Step S3-1)
In the terminal device 200, the imaging unit 203 scans a document.
FIG. 7 is for explaining document scanning processing by the terminal device according to the present embodiment. As shown in FIG. 7, the screen SC of the terminal device 200 displays the scan area SCA. The scan area SCA can be adjusted by moving the positions of the upper left corner CUL, the upper right corner CUR, the lower left corner CLL, and the lower right corner CLR indicated by circles at the four corners of the scan area SCA.
The user U adjusts the distance between the terminal device 200 and the document DOC and the angle with respect to the document DOC so that the document DOC is within the scan area SCA. Scan data of the document is created when the user U presses the scan button SCB. Returning to FIG. 3, the description continues.
The creation unit 206 receives the detection result of the operation of inputting document-related items from the operation detection unit 207, and acquires the document scan data from the imaging unit 203 when the user U performs an operation to scan the document.

(Step S4-1)
In the terminal device 200, the creation unit 206 creates a document management request addressed to the document management server 100, including the user ID, document-related items, and document scan data.
(Step S5-1)
In terminal device 200 , creation unit 206 outputs the created document management request to communication unit 102 . The communication unit 102 acquires the document management request output by the creation unit 206 and transmits the acquired document management request to the document management server 100 .

(Step S6-1)
In the document management server 100 , the communication section 102 receives the document management request transmitted by the terminal device 200 . The conversion unit 101 acquires the user ID and the document scan data included in the document management request received by the communication unit 102 . The conversion unit 101 converts the acquired scan data of the document into text data of the document.
(Step S7-1)
In the document management server 100, the first reception section 103-1 acquires the document management request received by the communication section . The first reception unit 103-1 receives the user ID, the document-related items, the scan data of the document, and the text data of the document included in the acquired document management request. The first reception unit 103-1 creates document identification information that uniquely identifies the acquired document-related matters and the scan data of the document. The first reception unit 103-1 acquires from the conversion unit 101 the text data of the document corresponding to the user ID included in the acquired document management request. First accepting unit 103-1 accepts the acquired user ID and the text data of the document. The first receiving unit 103-1 extracts one or a plurality of predetermined items such as a title included in the document based on the text data of the received document.

(Step S8-1)
In the document management server 100, the first dividing unit 104-1 acquires the user ID and text data of the document accepted by the first accepting unit 103-1. The first dividing unit 104-1 obtains one or more words by dividing the character string included in the document based on the text data of the obtained document.
(Step S9-1)
In the document management server 100, the first division unit 104-1 converts the display format of the alphanumeric characters contained in each of the acquired one or more words into half-size characters, and converts the representation format of the alphabetic characters into lowercase letters. Process to align the format.

(Step S10-1)
In the document management server 100, the first encryption unit 105-1 converts the display format of the user ID and alphanumeric characters from the first division unit 104-1 to half-width characters, and converts the representation format of alphabetic characters to lower case. word and get. First encryption unit 105-1 acquires one or more predetermined items such as a title included in a document corresponding to the user ID acquired from first reception unit 103-1. The first encryption unit 105-1 converts the display format of the acquired alphanumeric characters to half-size characters, converts the expression format of the alphabetic characters to lower case letters, and converts each of one or more words to one or more predetermined items. Encrypt.
(Step S11-1)
In the document management server 100, the registration unit 106 converts the user ID from the first encryption unit 105-1, the result of encrypting one or more predetermined items, and the alphanumeric display format into single-byte characters, and the result of encrypting each of the one or more words obtained by converting the expression form of to lower case. The registration unit 106 encrypts each of the results obtained by encrypting one or more predetermined items and one or more words obtained by converting the display format of alphanumeric characters into half-width characters and converting the representation format of alphabetic characters into lowercase letters. index the document in order of appearance.
The processing unit 107 receives the user ID from the registration unit 106, the result of encrypting one or more predetermined items, and one or more items obtained by converting the display format of alphanumeric characters into single-byte characters and converting the representation format of alphabetic characters into lowercase characters. Get the index of the document that registered the results of encrypting each of the words in . The processing unit 107 acquires document identification information corresponding to the acquired user ID and scan data of the document. The processing unit 107 converts the obtained user ID, the document identification information, the result of encrypting one or a plurality of predetermined items, and the alphanumeric display format to half-size, and converts the alphabetic representation format to lowercase. The index of the document in which the result of encrypting each of one or more words and the scanned data of the document are associated with each other and stored in the storage unit 109 .

(Step S12-1)
In the document management server 100, the creation unit 110 creates a document management response addressed to the terminal device 200, including information indicating that document management has started.
(Step S13-1)
In the document management server 100 , the creation unit 110 outputs the created document management response to the communication unit 102 . The communication unit 102 acquires the document management response output by the creation unit 110 and transmits the acquired document management response to the terminal device 200 .

(Step S14-1)
In the terminal device 200 , the communication section 202 receives the document management response transmitted by the document management server 100 . The display processing unit 208 acquires information indicating that management of the document contained in the document management response received by the communication unit 202 has started. The display processing unit 208 causes the display unit 201 to display information indicating that management of the acquired document has started.
FIG. 8 is a diagram showing example 1 of information displayed on the terminal device according to the present embodiment. As shown in FIG. 8, the terminal device 200 displays, as an example of information indicating that document management has started, that the contract has been successfully uploaded and the text has been analyzed, and that the content of the contract has been confirmed. A button labeled . Here, when the button labeled "confirm contract details" is pressed, the contract details described with reference to FIGS. 4 to 6 are displayed.
FIG. 9 is a diagram showing Example 2 of information displayed on the terminal device according to the present embodiment. As shown in FIG. 9, the terminal device 200 displays "encrypted and stored in the cloud" as an example of information indicating that document management has started.

FIG. 10 is a diagram showing Example 2 of the operation of the document management system according to this embodiment. Referring to FIG. 10, the operation of referring to an arbitrary document from the documents stored in document management server 100 will be described.
(Step S1-2)
Between the terminal device 200 and the document management server 100, processing is performed for the terminal device 200 to log in to the document management system 1. FIG. Here, the explanation will be continued for the case where the terminal device 200 has successfully logged into the document management system 1 . When the terminal device 200 fails to log in to the document management system 1, predetermined error processing is performed.

(Step S2-2)
In the terminal device 200 , the display processing section 208 causes the display section 201 to display an initial screen when the terminal device 200 logs in to the document management system 1 . The display processing unit 208 causes the display unit 201 to display a document search request screen when the detection result of the operation of pressing the document search request button is input from the operation detection unit 207 .
FIG. 11 is a diagram showing Example 1 of information displayed on the terminal device according to the present embodiment. FIG. 11 shows an example of a document search request screen. As shown in FIG. 11, the document search request screen includes a field for entering a search character string. Specifically, the document search request screen includes a field for entering a search character string when searching for documents containing the search character string. The document search request screen includes a field for entering a search character string when searching for documents that do not contain the search character string. FIG. 11 shows, as an example of the document search request screen, fields for entering search character strings when searching for documents containing search character strings, and fields for entering search character strings when searching for documents that do not contain search character strings. A case where a field for entering a character string for search is included is shown. Returning to FIG. 10, the description is continued.

The creation unit 206 receives from the operation detection unit 207 the detection result of the operation of pressing the document search request button, the detection result of the operation of entering a search character string, and the detection result of the operation of pressing the OK button. In this case, a document search request addressed to the document management server 100 is created, which includes the user ID and information specifying the search character string. As an example, the case where a search character string is entered in a field for entering a search character string when searching for a document containing the search character string will be described below.

(Step S3-2)
In terminal device 200 , creation unit 206 outputs the created document search request to communication unit 102 . The communication unit 102 acquires the document search request created by the creation unit 206 and transmits the acquired document search request to the document management server 100 .
(Step S4-2)
In the document management server 100 , the communication section 102 receives the document search request transmitted by the terminal device 200 . The second reception unit 103-2 acquires the document search request received by the communication unit 102. FIG. The second reception unit 103-2 receives information specifying the user ID and search character string included in the acquired document search request.
Second dividing unit 104-2 acquires the user ID and the text data of the search character string accepted by second accepting unit 103-2. The second dividing unit 104-2 obtains one or more words by dividing the character string included in the search character string based on the obtained text data of the search character string.

(Step S5-2)
In the document management server 100, the second dividing unit 104-2 converts the display format of alphanumeric characters contained in each of the acquired one or more words into half-width characters, and converts the representation format of alphabetic characters into lowercase letters.
(Step S6-2)
In the document management server 100, the second encryption unit 105-2 converts the display format of the alphanumeric characters included in the user ID and search character string from the second dividing unit 104-2 into half-width characters, Gets one or more words converted to lowercase. The second encryption unit 105-2 encrypts each of one or a plurality of words included in the obtained search character string, converted from alphanumeric display format to half-size, and from alphabetic representation format to lowercase. do.
(Step S7-2)
In the document management server 100, the search unit 108 acquires the user ID and the result of encrypting each of one or more words from the second encryption unit 105-2. The search unit 108 retrieves an index of a document that includes one or more of the results of encrypting one or more words obtained from among one or more document indexes stored in the storage unit 109 in association with the obtained user ID. Search for The search unit 108 obtains one or more indexes of documents including any of the results of encrypting one or more words by searching. The search unit 108 rearranges the obtained indexes of the one or more documents in descending order of the matching rate of the encrypted one or more words. The search unit 108 acquires document identification information associated with each of the rearranged indexes of one or more documents.

(Step S8-2)
In the document management server 100 , the creating unit 110 creates a document search response addressed to the terminal device 200 , which includes one or more pieces of document specifying information acquired by the searching unit 108 . The document management server 100 outputs the created document search response to the communication unit 102 .
(Step S9-2)
In the document management server 100 , the communication unit 102 acquires the document search response output by the creation unit 110 and transmits the acquired document search response to the terminal device 200 .
(Step S10-2)
In the terminal device 200 , the communication section 202 receives the document search response transmitted by the document management server 100 . The display processing unit 208 acquires one or more pieces of document identification information included in the document search response received by the communication unit 202 . The display processing unit 208 causes the display unit 201 to display one or more pieces of acquired document specifying information.

(Step S11-2)
In the terminal device 200, the creation unit 206 receives from the operation detection unit 207 a detection result of an operation of pressing a portion corresponding to the document specifying information to be browsed. A document request addressed to the management server 100 is created.
(Step S12-2)
In terminal device 200 , creation unit 206 outputs the created document request to communication unit 102 . The communication unit 102 acquires the document request output by the creation unit 206 and transmits the acquired document request to the document management server 100 .

(Step S13-2)
In the document management server 100 , the communication section 102 receives the document request transmitted by the terminal device 200 . The processing unit 107 acquires the document request received by the communication unit 102 . The processing unit 107 acquires document specifying information included in the acquired document request. The processing unit 107 acquires from the storage unit 109 the scan data of the document and the text data of the document stored in association with the acquired document specifying information.
(Step S14-2)
In the document management server 100, the processing unit 107 obtains one or more words by dividing the character string included in the document based on the text data of the obtained document.

(Step S15-2)
In the document management server 100, the processing unit 107 extracts document-related matters based on predetermined rules such as the format of each of the acquired one or more words and the arrangement of parts of speech.
(Step S16-2)
In the document management server 100, the creation unit 110 acquires the scan data of the document acquired by the processing unit 107, the text data of the document, and the extracted document-related items. The preparation unit 110 prepares a document response destined for the terminal device 200 including the acquired scan data of the document, the text data of the document, and the extracted document-related items.
(Step S17-2)
In the document management server 100 , the creation unit 110 outputs the created document response to the communication unit 102 . The communication unit 102 acquires the document response output by the creation unit 110 and transmits the acquired document response to the terminal device 200 .

(Step S18-2)
In the terminal device 200 , the communication section 202 receives the document response transmitted by the document management server 100 . The display processing unit 208 acquires the document scan data, the document text data, and the document-related items included in the document response received by the communication unit 202 . The display processing unit 208 causes the display unit 201 to display the selected one of the acquired scan data of the document, text data of the document, and document-related items.
FIG. 12 is a diagram showing example 2 of information displayed on the terminal device according to the present embodiment. FIG. 12 shows a confidentiality agreement as an example of display. As shown in FIG. 12, as an example of the display, it is possible to selectively display contract information (document-related items), read text (document text data), and original (document scan data). . For example, when contract information is selected, document-related items such as the document title, contract type, conclusion date, issue date, and expiration date are displayed as shown in FIGS.

In the above-described embodiment, the case where the user U inputs document-related items on the terminal device 200 has been described, but the present invention is not limited to this example. For example, the terminal device 200 may convert document scan data into document text data, and extract document-related items from the document text data. The terminal device 200 may display the extracted document-related items on the document management request screen. Specifically, the terminal device 200 includes a conversion unit and a processing unit. The conversion unit converts the document scan data into document text data. The processing unit extracts document-related items from the document text data. The display processing unit 208 displays items corresponding to the document-related items extracted by the processing unit on the document management request screen. By configuring in this way, it is possible to reduce the trouble of the user U inputting document-related matters.

In the above-described embodiment, the document index contains the result of encrypting one or more predetermined items and one or more words in which the alphanumeric representation format is converted to half-width and the alphabetic representation format is converted to lowercase. Although the case where the result of encrypting each of is registered has been described, the present invention is not limited to this example. For example, in a document index, the result of encrypting one or more predetermined items and one or more words converted from alphanumeric display formats to half-width characters and from alphabetic representation formats to lowercase are encrypted. Either one of the converted result and the converted result may be registered.

In the above-described embodiment, the case where the document management server 100 encrypts each of one or more words obtained by dividing the character string included in the document has been described, but the present invention is not limited to this example. For example, the first encryption unit 105-1 may encrypt one or more words that correspond to a predetermined part of speech such as a noun or a verb. By configuring in this way, the processing load on the document management server 100 can be reduced compared to the case where all one or more words are encrypted.

In the above-described embodiment, the case where the document management server 100 encrypts each of one or more words obtained by dividing the character string included in the search character string has been described, but the present invention is limited to this example. Absent. For example, the second encryption unit 105-2 may encrypt words corresponding to a predetermined part of speech such as nouns and verbs among one or more words. By configuring in this way, the processing load on the document management server 100 can be reduced compared to the case where all one or more words are encrypted.

According to the document management system 1 according to the above-described embodiment, the document management server 100 includes a first reception section 103-1, a first division section 104-1, a first encryption section 105-1, a registration section 106, a processing unit 107, a second reception unit 103-2, a second division unit 104-2, a second encryption unit 105-2, and a search unit .
First reception unit 103-1 receives text data of a document. First dividing unit 104-1 divides the text data received by first receiving unit 103-1 to obtain a plurality of words. First encryption unit 105-1 encrypts each of the plurality of words acquired by first division unit 104-1. Registration unit 106 registers each of the plurality of words encrypted by first encryption unit 105-1 in the document index. The processing unit 107 associates the index of the document in which each of the plurality of words encrypted by the registration unit 106 is registered with the document, and stores them in the storage unit 109 as document data.

Second accepting unit 103-2 accepts a search character string. Second division unit 104-2 divides the character string for search received by second reception unit 103-2 to acquire one or more words. Second encryption unit 105-2 encrypts each of the one or more words acquired by second division unit 104-2. Search unit 108 searches for a plurality of document data based on each of the one or more words encrypted by second encryption unit 105-2.
By configuring in this way, each of the plurality of words obtained by dividing the text data of the document can be encrypted, and each of the plurality of encrypted words can be registered in the index of the document. By encrypting each of one or more words obtained by dividing the search string and searching the index of documents containing any of the encrypted words, I can get the document. Therefore, the convenience of document management can be improved.

First dividing unit 104-1 converts a character string included in each of a plurality of words into a predetermined format, and first encryption unit 105-1 converts first dividing unit 104-1 into a predetermined format. encrypted string. By configuring in this way, the character strings included in each of the plurality of words can be arranged in a predetermined format. Therefore, the retrieval can be facilitated by inputting the retrieval character string in the predetermined format.

First receiving unit 103-1 extracts one or more predetermined items included in the text data of the document, and first encryption unit 105-1 encrypts the one or more items extracted by first receiving unit 103-1. Each of the predetermined items is encrypted, the registration unit 106 registers the encryption result of the one or more predetermined items in the index of the document, and the processing unit 107 causes the registration unit 106 to encrypt the one or more predetermined items. is further stored in the storage unit 109 as document data in association with the index of the document in which the encrypted result is further registered.
By configuring in this way, each of the one or more predetermined items included in the text data of the document can be encrypted, and the result of encrypting the one or more predetermined items can be further registered in the index of the document. By encrypting each of one or more words obtained by dividing the search string and searching the index of documents containing any of the encrypted words, I can get the document. Therefore, the convenience of document management can be further improved.

The registration unit 106 registers each of the multiple words encrypted by the first encryption unit 105-1 in the document index based on the order of the multiple words included in the text data. In a document such as a contract, it is assumed that there are more words corresponding to the search character string in the first part than in the second part. With this configuration, each of the plurality of words encrypted by the first encryption unit 105-1 can be registered in the document index based on the order of the plurality of words included in the text data. You can reduce the time to find a hit when searching the index for documents that contain one of multiple encrypted words.

The first encryption unit 105-1 encrypts words corresponding to a predetermined part of speech among the plurality of words acquired by the first division unit 104-1. By configuring in this way, the processing load on the document management server 100 can be reduced compared to the case where all one or more words are encrypted. It is assumed that particles such as particles cannot be used for document retrieval even if they are encrypted.

The search unit 108 searches for a plurality of encrypted words included in each index of a plurality of documents that match each of the one or more words encrypted by the second encryption unit 105-2. do. By configuring in this way, it is possible to search for documents containing search character strings.

The search unit 108 derives the match rate between each of the one or more words encrypted by the second encryption unit 105-2 and the plurality of encrypted words included in each of the indexes of the plurality of documents. do. For example, the match rate derives how many words (percentage) the encrypted word or words in the search string match the encrypted words in the index. can be anything.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like are included within the scope of the present invention.
For example, a computer program for realizing the functions of the devices described above may be recorded on a computer-readable recording medium, and the computer program recorded on this recording medium may be read and executed by a computer system. . Note that the “computer system” referred to here may include hardware such as an OS and peripheral devices.

In addition, "computer-readable recording medium" includes writable nonvolatile memories such as flexible discs, magneto-optical discs, ROMs and flash memories, portable media such as DVDs (Digital Versatile Discs), and computer system built-in media. A storage device such as a hard disk that
Furthermore, "computer-readable recording medium" means a volatile memory (e.g., DRAM ( It also includes those that hold programs for a certain period of time, such as Dynamic Random Access Memory)).

Further, the above program may be transmitted from a computer system storing this program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in a transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
Further, the program may be for realizing part of the functions described above.
Further, it may be a so-called difference file (difference program) that can realize the above-described functions in combination with a program already recorded in the computer system.

REFERENCE SIGNS LIST 1 document management system 100 document management server 101 conversion unit 102 communication unit 103-1 first reception unit 103-2 second reception unit 104-1 first division unit 104 -2... Second dividing unit 105-1... First encryption unit 105-2... Second encryption unit 106... Registration unit 107... Processing unit 108... Searching unit 109... Storage unit 110... Creation unit 200 Terminal device 201 Display unit 202 Communication unit 203 Imaging unit 206 Creation unit 207 Operation detection unit 208 Display processing unit 209 Storage unit

Claims

a first reception unit that receives text data of a document;
a first dividing unit that divides the text data received by the first receiving unit and acquires a plurality of words;
a first encryption unit that encrypts each of the plurality of words acquired by the first division unit;
a registration unit for registering each of the plurality of words encrypted by the first encryption unit in an index of the document;
a processing unit that associates the index of the document in which each of the plurality of words encrypted by the registration unit is registered with the document and stores the document as document data in a storage unit;
a second reception unit that receives a character string for search;
a second dividing unit that divides the search character string received by the second receiving unit to obtain one or more words;
a second encryption unit that encrypts each of the one or more words acquired by the second division unit;
A document management server, comprising: a search unit that searches for the plurality of document data based on each of the one or more words encrypted by the second encryption unit.
The first dividing unit converts a character string included in each of the plurality of words into a predetermined format,
2. The document management server according to claim 1, wherein said first encryption unit encrypts said character string converted into said predetermined format by said first division unit.
The first reception unit extracts one or more predetermined items included in the text data of the document,
The first encryption unit encrypts each of the one or more predetermined items extracted by the first reception unit,
The registration unit registers a result of encrypting one or more predetermined items in the index of the document;
3. The processing unit associates the document with the index of the document in which a result of encrypting one or more of the predetermined items is further registered by the registration unit, and causes the storage unit to store the index and the document as document data. 3. The document management server according to claim 1 or 2.
3. The registration unit registers each of the plurality of words encrypted by the first encryption unit in the index of the document based on the order of the plurality of words included in the text data. The document management server according to any one of claims 1 to 3.
5. The first encryption unit according to any one of claims 1 to 4, wherein the first encryption unit encrypts words corresponding to a predetermined part of speech among the plurality of words acquired by the first division unit. Document management server.
The search unit searches for a plurality of encrypted words included in each index of a plurality of documents that match each of the one or more words encrypted by the second encryption unit. 6. The document management server according to any one of claims 1 to 5, wherein the document management server
The search unit derives a match rate between each of the one or more words encrypted by the second encryption unit and the plurality of encrypted words included in each of the indexes of the plurality of documents. The document management server according to any one of claims 1 to 6, wherein the document management server
A document management method executed by a document management server, comprising:
accepting text data of a document;
splitting the text data to obtain multiple words;
encrypting each of a plurality of said words;
indexing each of the plurality of words encrypted in the encrypting step into an index of the document;
a step of associating the index of the document in which each of the plurality of encrypted words is registered with the document and storing the document as document data in a storage unit;
accepting a search string;
dividing the search string to obtain one or more words;
encrypting each of the one or more words obtained by dividing the search string;
and searching for a plurality of the document data based on each of the one or more words obtained by dividing the encrypted character string for search.
to the computer,
accepting text data of a document;
splitting the text data to obtain multiple words;
encrypting each of a plurality of said words;
indexing each of the plurality of words encrypted in the encrypting step into an index of the document;
a step of associating the index of the document in which each of the plurality of encrypted words is registered with the document and storing the document as document data in a storage unit;
accepting a search string;
dividing the search string to obtain one or more words;
encrypting each of the one or more words obtained by dividing the search string;
and searching for a plurality of the document data based on each of the one or more words obtained by dividing the encrypted search character string.