KR102658134B1 - Electronic document management server that performs database processing for electronic document based on identification tag and operating method thereof - Google Patents

Abstract

An electronic document management server and method of operating the same are disclosed. The present invention proposes an electronic document management server that performs database processing for electronic documents based on identification tags and an operating method thereof, thereby enabling efficient recording and provision of content data included in electronic documents using identification tags. We can support you to do so.

Description

An electronic document management server that performs database processing for electronic documents based on identification tags and an operating method thereof

The present invention relates to an electronic document management server that performs database processing on electronic documents based on identification tags and a method of operating the same.

Recently, as the COVID-19 situation prolongs, the spread of non-face-to-face work methods such as remote and telecommuting and video conferencing is accelerating.

Accordingly, the proportion of work centered on existing paper documents is decreasing, and the proportion of work centered on electronic documents is increasing.

As the rate of work centered on electronic documents increases, public institutions, financial institutions, and companies need to turn electronic documents into databases so that they can efficiently record and provide content data contained in electronic documents.

In this regard, it would be possible to introduce a method to efficiently manage the content data included in the electronic document by assigning an identification tag to each of the content data included in the electronic document.

Meanwhile, since electronic documents held by public institutions, financial institutions, and companies often require external security, more strengthened security may need to be applied to the content data included in the electronic documents.

Therefore, research is needed on system technology to database electronic documents using identification tags and security technology to apply stronger security to content data included in the electronic documents.

The present invention proposes an electronic document management server that performs database processing for electronic documents based on identification tags and an operating method thereof, thereby enabling efficient recording and provision of content data included in electronic documents using identification tags. We would like to support you in doing so.

An electronic document management server that performs database processing for an electronic document based on an identification tag according to an embodiment of the present invention provides a document file for the electronic document from a user terminal - the document file for the electronic document is stored in the electronic document. metadata in which a plurality of different preset identification tags are recorded to identify each of the document data and the plurality of paragraphs, plurality of objects, and plurality of tables included in the electronic document. Configured - When a database request command for the electronic document is received from the user terminal, the metadata included in the document file for the electronic document is read to check the plurality of identification tags. An identification tag confirmation unit, a management table creation unit for generating a management table for recording content data included in the electronic document when the plurality of identification tags are confirmed, and a document file for the electronic document when the management table is generated. A first information recording processing unit that extracts text data for the plurality of paragraphs from the document data included in and records text data for each paragraph and identification tags corresponding to each paragraph in correspondence with each other in the management table; A second information recording processor extracting entity data for the plurality of entities from the document data and then recording entity data for each entity and identification tags corresponding to each entity in correspondence with each other in the management table, the document data A third information recording processing unit that extracts table data for the plurality of tables from the table and then records the table data for each table and the identification tag corresponding to each table in correspondence with each other in the management table, and the electronic document in the management table. When the recording of the content data included in the electronic document is completed, the document file for the electronic document is applied as an input to a preset hash function to generate a first hash value, and then the first hash value and the management table are stored in the document database. It includes an information storage processing unit that stores the information in correspondence with each other.

In addition, a method of operating an electronic document management server that performs database processing on an electronic document based on an identification tag according to an embodiment of the present invention includes a document file for the electronic document from a user terminal - a document file for the electronic document. consists of document data for the electronic document and metadata in which a plurality of different preset identification tags are recorded to identify each of a plurality of paragraphs, a plurality of objects, and a plurality of tables included in the electronic document - When receiving a database request command for the electronic document from the user terminal, reading the metadata included in a document file for the electronic document to check the plurality of identification tags, the plurality of identification tags When identification tags are confirmed, creating a management table for recording content data included in the electronic document, once the management table is created, selecting the plurality of paragraphs from the document data included in the document file for the electronic document. After extracting text data for each paragraph, recording text data for each paragraph and identification tags corresponding to each paragraph in correspondence with each other in the management table, extracting entity data for the plurality of entities from the document data. After, recording entity data for each entity and identification tags corresponding to each entity in correspondence with each other in the management table, extracting table data for the plurality of tables from the document data, and then extracting table data for each table. and recording identification tags corresponding to each table in correspondence with each other in the management table, and when recording of content data included in the electronic document in the management table is completed, storing the document file for the electronic document in a preset hash It includes generating a first hash value by applying it as an input to the function, and then storing the first hash value and the management table in correspondence with each other in a document database.

The present invention proposes an electronic document management server that performs database processing for electronic documents based on identification tags and an operating method thereof, thereby enabling efficient recording and provision of content data included in electronic documents using identification tags. We can support you to do so.

1 is a diagram showing the structure of an electronic document management server according to an embodiment of the present invention.
Figure 2 is a flowchart showing a method of operating an electronic document management server according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing each drawing, similar reference numerals are used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are within the scope of common knowledge in the technical field to which the present invention pertains. It has the same meaning as generally understood by those who have it.

In this document, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary. Additionally, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more subcomponents, and the electrical, electronic, and mechanical functions performed by each component may be electronic. It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, and ASICs (Application Specific Integrated Circuits), and may be implemented separately or by integrating two or more into one.

Meanwhile, the blocks in the attached block diagram or the steps in the flow chart are computer program instructions that are mounted on the processor or memory of equipment capable of data processing, such as general-purpose computers, special-purpose computers, portable laptop computers, and network computers, and perform designated functions. It can be interpreted to mean. Because these computer program instructions can be stored in a memory provided in a computer device or in a computer-readable memory, the functions described in the blocks of a block diagram or the steps of a flow diagram can be produced as a manufactured product containing instruction means to perform them. It could be. In addition, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). Additionally, it should be noted that in some alternative embodiments, it is possible for functions mentioned in blocks or steps to be executed in a different order. For example, two blocks or steps shown in succession may be performed substantially simultaneously or in reverse order, and in some cases, some blocks or steps may be omitted.

1 is a diagram showing the structure of an electronic document management server according to an embodiment of the present invention.

The electronic document management server 110 according to the present invention is a server that performs database processing on electronic documents based on identification tags, and includes an identification tag confirmation unit 111, a management table creation unit 112, and a first information record. It includes a processing unit 113, a second information recording processing unit 114, a third information recording processing unit 115, and an information storage processing unit 116.

When a document file for an electronic document is received from the user terminal 140 and a request command to create a database for the electronic document is received from the user terminal 140, the identification tag confirmation unit 111 stores the document file for the electronic document. Read the metadata included in and check a plurality of identification tags.

Here, the document file for the electronic document includes document data for the electronic document, a plurality of paragraphs included in the electronic document, and a plurality of objects (here, the object refers to a shape, image, etc. that can be inserted into the electronic document). It is composed of metadata in which a plurality of different preset identification tags (meaning the same item) are recorded to identify each of the plurality of tables.

When the plurality of identification tags are confirmed, the management table generator 112 creates a management table for recording content data included in the electronic document.

When the management table is created, the first information recording processing unit 113 extracts text data for the plurality of paragraphs from the document data included in the document file for the electronic document, and then extracts text data for each paragraph and Identification tags corresponding to each paragraph are recorded in correspondence with each other in the management table.

The second information recording processing unit 114 extracts entity data for the plurality of entities from the document data and then records the entity data for each entity and the identification tag corresponding to each entity in correspondence with each other in the management table. .

The third information recording processing unit 115 extracts table data for the plurality of tables from the document data and then records the table data for each table and the identification tag corresponding to each table in correspondence with each other in the management table.

When the information storage processing unit 116 completes recording the content data included in the electronic document in the management table, the information storage processing unit 116 generates a first hash value by applying the document file for the electronic document as input to a preset hash function. Afterwards, the first hash value and the management table are stored in correspondence with each other in a document database (not shown).

In relation to this, the identification tag confirmation unit 111, the management table creation unit 112, the first information recording processing unit 113, the second information recording processing unit 114, the third information recording processing unit 115, and the information storage processing unit ( The operation of 116) will be explained in detail using an example.

First, when a document file for an electronic document is received from the user terminal 140 to the electronic document management server 110, a command to request database creation of the electronic document is sent from the user terminal 140 to the electronic document management server 110. Once received, the identification tag confirmation unit 111 can check a plurality of identification tags by reading metadata included in a document file for the electronic document.

In relation to this, the electronic document includes a plurality of paragraphs referred to as 'Paragraph 1, Paragraph 2, and Paragraph 3', a plurality of entities referred to as 'Entity 1, Entity 2', and a plurality of entities referred to as 'Table 1, Table 2'. In the case where tables are included, the document file for the electronic document includes document data for displaying the electronic document on a predetermined electronic terminal device, the plurality of paragraphs included in the electronic document, and the plurality of Metadata in which identification tags corresponding to each of the entities and the plurality of tables are recorded may be included.

At this time, the identification tags corresponding to each of the plurality of paragraphs, the plurality of entities, and the plurality of tables included in the electronic document are designated as 'identification tag 1, identification tag 2, identification tag 3, identification tag 4, and identification tag. In the case of '5, identification tag 6, identification tag 7', 'identification tag 1, identification tag 2, identification tag 3, identification tag 4, identification tag 5, identification tag 6, identification tag 7' are recorded in the metadata. There may be.

In this case, the identification tag confirmation unit 111 reads the metadata included in the document file for the electronic document and selects the plurality of identification tags 'identification tag 1, identification tag 2, identification tag 3, identification tag 4, You can check identification tag 5, identification tag 6, and identification tag 7.

In this way, when the plurality of identification tags are confirmed by the identification tag confirmation unit 111, the management table creation unit 112 can create a management table for recording content data included in the electronic document.

In this way, when the management table is created by the management table creation unit 112, the first information recording processing unit 113 generates the plurality of paragraphs, 'paragraph 1,' from the document data included in the document file for the electronic document. Text data for ‘paragraph 2’ and ‘paragraph 3’ can be extracted.

If the text data for the plurality of paragraphs 'paragraph 1, paragraph 2, and paragraph 3' from the document data included in the document file for the electronic document by the first information recording processing unit 113 is 'text data 1' , Text Data 2, Text Data 3', the first information recording processing unit 113 corresponds to each paragraph with 'Text Data 1, Text Data 2, and Text Data 3', which are text data for each paragraph. The identification tags 'identification tag 1, identification tag 2, and identification tag 3' can be recorded in correspondence with each other in the management table as shown in Table 1 below.

Text data for each paragraph Identification tag corresponding to each paragraph Paragraph 1 text data 1 identification tag 1 Paragraph 2 text data 2 identification tag 2 Paragraph 3 text data 3 identification tag 3

Then, the second information recording processing unit 114 may extract entity data for the plurality of entities, 'Individual 1, Object 2', from the document data.

If it is said that entity data for the plurality of entities, 'object 1, entity 2', is extracted from the document data by the second information recording processing unit 114 as 'object data 1, entity data 2', the first 2 The information recording processing unit 114 stores the entity data for each object, ‘Individual Data 1, Object Data 2’, and the identification tags corresponding to each entity, ‘Identification Tag 4, Identification Tag 5’, in a management table as shown in Table 1 above. It can be recorded as in Table 2 below by corresponding to each other.

Text data for each paragraph Identification tag corresponding to each paragraph Paragraph 1 text data 1 identification tag 1 Paragraph 2 text data 2 identification tag 2 Paragraph 3 text data 3 identification tag 3 Text data for each object Identification tag corresponding to each object object 1 object data 1 identification tag 4 object 2 object data 2 identification tag 5

Then, the third information recording processing unit 115 may extract table data for the plurality of tables 'Table 1, Table 2' from the document data.

If table data for the plurality of tables 'Table 1, Table 2' is extracted from the document data by the third information recording processing unit 115 as 'Table Data 1, Table Data 2', 3 The information recording processing unit 115 stores 'table data 1, table data 2', which are table data for each table, and 'identification tag 6, identification tag 7', which are identification tags corresponding to each table, in a management table as shown in Table 2 above. It can be recorded as in Table 3 below by corresponding to each other.

Text data for each paragraph Identification tag corresponding to each paragraph Paragraph 1 text data 1 identification tag 1 Paragraph 2 text data 2 identification tag 2 Paragraph 3 text data 3 identification tag 3 Object data for each object Identification tag corresponding to each object object 1 object data 1 identification tag 4 object 2 object data 2 identification tag 5 Table data for each table Identification tag corresponding to each table Table 1 Table data 1 identification tag 6 Table 2 Table data 2 identification tag 7

In this way, when the recording of the content data included in the electronic document is completed in the management table as shown in Table 3, the information storage processing unit 116 applies the document file for the electronic document as input to the hash function, ' A first hash value such as '16d103c620a31345ag57qat327891700' can be generated.

Afterwards, the information storage processing unit 116 may store the first hash value '16d103c620a31345ag57qat327891700' in the document database as shown in Table 4 below by matching the management table shown in Table 3 above.

hash value Text data for each paragraph Identification tag corresponding to each paragraph 16d103c620a31345ag57qat327891700 Paragraph 1 text data 1 identification tag 1 Paragraph 2 text data 2 identification tag 2 Paragraph 3 text data 3 identification tag 3 Object data for each object Identification tag corresponding to each object object 1 object data 1 identification tag 4 object 2 object data 2 identification tag 5 Table data for each table Identification tag corresponding to each table Table 1 Table data 1 identification tag 6 Table 2 Table data 2 identification tag 7

At this time, according to an embodiment of the present invention, the information storage processing unit 116 includes a table maintenance unit 117, a random number generator 118, an encryption key generation function extractor 119, and a hash value generator 120. , may include a management table encryption unit 121, a storage processing unit 122, and an information transmission unit 123.

The table maintenance unit 117 is an encryption key in which preset t (t is a natural number of 2 or more) encryption key generation functions and different integers from 0 to t-1 corresponding to each encryption key generation function are recorded. Save and maintain the creation function table.

Here, the encryption key generation function is a function that can generate an encryption key based on a predetermined value when a predetermined value is input, and is a function that can be preset by the developer.

In relation to this, when t is assumed to be '5', the table maintenance unit 117 may store and maintain an encryption key generation function table as shown in Table 5 below.

5 encryption key generation functions integer value Encryption key generation function 1 0 Encryption key generation function 2 One Encryption key generation function 3 2 Encryption key generation function 4 3 Encryption key generation function 5 4

When the recording of content data included in the electronic document in the management table is completed, the random number generator 118 generates a random number composed of a natural number with k (k is a natural number) digits.

When the random number is generated, the encryption key generation function extractor 119 performs a modulo operation using the random number as a dividend and t as a divisor to calculate an operation value and generate the encryption key. The first encryption key generation function corresponding to the operation value is extracted from the function table.

Here, the modulo operation refers to an operation that performs division by dividing the dividend by the divisor and calculates the remainder.

The hash value generator 120 generates the first hash value by applying the document file for the electronic document as input to the hash function.

The management table encryption unit 121 generates a first encryption key by applying the first hash value as an input to the first encryption key generation function and then encrypts the management table with the first encryption key.

When the management table is encrypted, the storage processing unit 122 stores the first hash value and the encrypted management table in correspondence with each other in the document database.

When the first hash value and the encrypted management table are stored in correspondence with each other in the document database, the information transmission unit 123 transmits the random number to the user terminal 140 and generates the random number to the user terminal 140. A guidance message indicating that the number is a security code for decrypting the encrypted management table is transmitted.

In relation to this, the random number generator 118, the encryption key generation function extractor 119, the hash value generator 120, the management table encryption unit 121, the storage processor 122, and the information transmission unit 123. The operation will be explained in detail using an example.

First, let us assume that k is '4' and t is '5'. At this time, when the recording of the content data included in the electronic document is completed in the management table as shown in Table 3, the random number generator 118 randomly generates '1600', a random number composed of 4-digit natural numbers. You can.

In this way, when the random number is generated by the random number generator 118, the encryption key generation function extractor 119 performs a modulo operation using the random number '1600' as the dividend and 5 as the divisor. By doing so, the operation value '0' can be calculated, and 'encryption key generation function 1' can be extracted as the first encryption key generation function corresponding to the operation value '0' from the encryption key generation function table shown in Table 5 above. You can.

Then, the hash value generator 120 may generate the first hash value such as '16d103c620a31345ag57qat327891700' by applying the document file for the electronic document as input to the hash function.

Afterwards, the management table encryption unit 121 generates a first encryption key by applying the first hash value, '16d103c620a31345ag57qat327891700', to the first encryption key generation function, 'encryption key generation function 1', and then generates the first encryption key in the table. A management table such as 3 can be encrypted with the first encryption key.

In this way, when the management table as shown in Table 3 is encrypted by the management table encryption unit 121, the storage processing unit 122 stores the first hash value '16d103c620a31345ag57qat327891700' and the encrypted management table as shown in Table 3 in the document database. can be stored in correspondence with each other.

In this way, when the first hash value '16d103c620a31345ag57qat327891700' and the encrypted management table shown in Table 3 are stored in correspondence with each other in the document database by the storage processing unit 122, the information transmission unit 123 stores the user terminal 140 While transmitting the random number '1600', an information message indicating that the random number '1600' is a security code for decrypting the encrypted management table as shown in Table 3 can be transmitted to the user terminal 140. .

According to one embodiment of the present invention, the electronic document management server 110 includes a security code request unit 124, a management table extractor 125, a function extractor 126, a management table decryption unit 127, and content data. It may further include a transmission unit 128.

The security code request unit 124 stores the first hash value and the encrypted management table together in the document database, and then receives the document file and the first identification tag for the electronic document from the user terminal 140. When a search request for content data corresponding to the first identification tag is received from the user terminal 140, transmission of a security code is requested to the user terminal 140.

When the random number is received as a security code from the user terminal 140, the management table extractor 125 applies the document file for the electronic document received from the user terminal 140 as input to the hash function and 1 After generating the hash value, the encrypted management table stored corresponding to the first hash value is extracted from the document database.

When the encrypted management table is extracted, the function extractor 126 calculates the operation value by performing a modulo operation using the random number received from the user terminal 140 as a dividend and t as a divisor. , the first encryption key generation function corresponding to the operation value is extracted from the encryption key generation function table.

The management table decryption unit 127 generates the first encryption key by applying the first hash value as an input to the first encryption key generation function and then decrypts the encrypted management table with the first encryption key.

When the encrypted management table is decrypted, the content data transmission unit 128 extracts the first content data recorded corresponding to the first identification tag from the decrypted management table and then transmits the first content data to the user terminal 140. 1 Transmit content data.

For example, as in the above-mentioned example, it is assumed that the first hash value '16d103c620a31345ag57qat327891700' and the encrypted management table shown in Table 3 are stored in the document database by the storage processing unit 122, and the first identification tag is stored in the document database. Let's assume it is 'identification tag 1'.

At this time, as the document file for the electronic document and the first identification tag, 'identification tag 1', are received from the user terminal 140 to the electronic document management server 110, the electronic document management server 110 is received from the user terminal 140. ), when a search request for content data corresponding to 'identification tag 1', which is the first identification tag, is received, the security code request unit 124 may request transmission of a security code to the user terminal 140.

At this time, when transmission of a security code is requested from the electronic document management server 110 to the user terminal 140, the user can input the security code into the user terminal 140. If the random number '1600' is entered as the security code, the user terminal 140 may transmit the random number '1600' to the electronic document management server 110.

At this time, when the random number '1600' is received as a security code from the user terminal 140 to the electronic document management server 110, the management table extractor 125 stores the electronic document received from the user terminal 140. By applying the document file as input to the hash function, the first hash value such as '16d103c620a31345ag57qat327891700' can be generated.

Afterwards, the management table extractor 125 may extract the encrypted management table shown in Table 3 stored in correspondence with the first hash value '16d103c620a31345ag57qat327891700' from the document database.

In this way, when the management table as shown in Table 3 encrypted by the management table extractor 125 is extracted, the function extractor 126 uses '1600', the random number received from the user terminal 140, as the dividend, By performing a modulo operation with 5 as the divisor, the operation value '0' can be calculated, and the first encryption key corresponding to the operation value '0' from the encryption key generation function table shown in Table 5 ‘Encryption key generation function 1’ can be extracted as a generation function.

Then, the management table decryption unit 127 generates the first encryption key by applying the first hash value, '16d103c620a31345ag57qat327891700', as an input to the first encryption key generation function, 'encryption key generation function 1', and then encrypts the first encryption key. The management table shown in Table 3 above can be decrypted using the first encryption key.

In this way, when the management table shown in Table 3 encrypted by the management table decryption unit 127 is decrypted, the content data transmission unit 128 identifies the first identification tag 'identification' from the decrypted management table shown in Table 3. After extracting 'text data 1' for 'paragraph 1' as the first content data recorded corresponding to 'tag 1', 'text data 1' for 'paragraph 1', which is the first content data, is extracted from the user terminal 140. 1' can be transmitted.

At this time, when 'text data 1' for 'paragraph 1' is received as the first content data from the electronic document management server 110, the user terminal 140 reads 'text data 1' for 'paragraph 1'. Thus, content for ‘Paragraph 1’ can be displayed on the screen of the user terminal 140.

If it is assumed that 'object data' for the 'object' is received from the electronic document management server 110 to the user terminal 140 as content data, the user terminal 140 receives the 'object data' for the 'object'. By reading, content about the 'object' can be displayed on the screen of the user terminal 140.

In addition, assuming that 'table data' for 'table' is received from the electronic document management server 110 to the user terminal 140 as content data, the user terminal 140 receives 'table data' for 'table'. By reading, content about 'table' can be displayed on the screen of the user terminal 140.

According to one embodiment of the present invention, the electronic document management server 110 may further include a main keyword extraction unit 129 and a main keyword storage unit 130.

The main keyword extraction unit 129 extracts a preset first number of main keywords from the electronic document when the first hash value and the management table are stored in correspondence with each other in the document database.

At this time, the main keyword extraction unit 129 includes a word extraction unit 131, a frequency confirmation unit 132, a candidate keyword selection unit 133, an average font size calculation unit 134, a count count unit 135, and a word It may include a vector generation unit 136 and a keyword extraction unit 137.

The word extractor 131 extracts a plurality of words inserted in the electronic document.

The frequency check unit 132 checks the frequency of appearance of each of the plurality of words in the electronic document.

For example, if words such as 'patent', trademark', 'design', 'intellectual property rights', 'application', 'registration', etc. are extracted from the electronic document, the frequency check unit 132 may select 'patent', trademark, etc. You can check the frequency of appearance of ', 'design', 'intellectual property rights', 'application', and 'registration' in the above electronic document.

The candidate keyword selection unit 133 selects a preset second number of words as candidate keywords in the order of their frequency of appearance among the plurality of words.

For example, when the second number is '10', the candidate keyword selection unit 133 selects '10' words as candidate keywords in order of increasing frequency of appearance in the electronic document among the plurality of words. You can.

The average font size calculation unit 134 calculates the average font size within the electronic document for each of the second number of words selected as the candidate keywords.

For example, if the candidate keywords include the word 'patent', the average font size calculation unit 134 may calculate the average font size of the word 'patent' in the electronic document. Relatedly, the word 'patent' appears a total of 100 times in the above electronic document, of which 50 times have a font size of '11pt', 30 times have a font size of '14pt', and 20 times have a font size of '20pt'. In the case where the font size is , the average font size calculation unit 134 can calculate '13.7pt' as the average font size value in the electronic document for the word 'patent'.

The number count unit 135 checks the median among the average font size values of each of the second number of words, and then each of the second number of words appears with a font size value greater than the median in the electronic document. Count the number of times you do it.

For example, if the second number of words are a total of '10' words and the median value among the average font size values of each of the '10' words is '12pt', the number count unit 135 The number of times each of the '10' words appears in the electronic document with a font size of '12pt' or more is counted. In relation to this, for the word 'patent' among the '10' words, if the word 'patent' appears in the electronic document a total of '50 times' with a font size value of '12pt' or more, the number count unit 135 counts 'patent'. You can count '50 times' for the word '.

The word vector generator 136 is a two-dimensional vector whose components, for each of the second number of words, are the average font size value of each word and the number of occurrences with a font size value greater than the median value counted for each word. By configuring the vector, a word vector corresponding to each of the second number of words is generated.

For example, if there is a word 'patent' among the second number of words, the average font size value for 'patent' is '13.7pt', and the number of times it appears with a font size value greater than the median is '50 times'. , the word vector generator 136 may generate a word vector called ‘[13.7 50]’ for the word ‘patent’. In this way, the word vector generator 136 can generate a word vector for each of the second number of words.

The keyword extractor 137 selects the first number of words from among the second number of words in the order of increasing Manhattan Norm of the word vector corresponding to each of the second number of words as the main keyword. Extracted from fields.

Here, the Manhattan norm is the L1 norm representing the size of a vector or matrix, and can be calculated according to Equation 1 below.

In Equation 1 above, means the Manhattan norm, and x _i means the ith component included in the vector or matrix.

In the present invention, a large Manhattan norm of a specific word means that the average font size value of the word and the number of times it appears with a font size greater than the median value in the electronic document are high, so the word is a word that is similar to other words in the electronic document. It can be seen as a word that contains more important meaning than others.

Accordingly, the keyword extractor 137 may extract as many words as the first number as the main keywords in the order of the Manhattan norm from the second number of words.

In this way, when the main keywords are extracted by the main keyword extraction unit 129, the main keyword storage unit 130 can additionally store the main keywords in correspondence with the first hash value in the document database.

According to one embodiment of the present invention, the electronic document management server 110 may further include a main keyword transmission unit 138.

After the main keywords are additionally stored in correspondence with the first hash value in the document database, the main keyword transmission unit 138 receives a document file for the electronic document from the user terminal 140, and the user terminal ( When a request for provision of main keyword information is received from 140), the document file for the electronic document received from the user terminal 140 is applied as input to the hash function to generate the first hash value, and then the document The main keywords stored corresponding to the first hash value are extracted from the database and then transmitted to the user terminal 140.

That is, after the main keywords are additionally stored in correspondence with the first hash value in the document database, the user transmits a document file for the electronic document through the user terminal 140, and the user terminal 140 When a request for provision of main keyword information is transmitted through , the main keyword transmission unit 138 applies the document file for the electronic document received from the user terminal 140 as input to the hash function and After generating the value, the main keywords stored corresponding to the first hash value can be extracted from the document database and then transmitted to the user terminal 140.

In this way, when information about the main keywords is received by the user terminal 140, the user checks the main keywords through the user terminal 140 to see at a glance what the contents of the document file for the electronic document are. can be figured out.

Figure 2 is a flow chart illustrating a method of operating an electronic document management server that performs database processing on electronic documents based on identification tags according to an embodiment of the present invention.

In step S210, a document file for an electronic document is sent from a user terminal (the document file for the electronic document includes document data for the electronic document, a plurality of paragraphs, a plurality of objects, and a plurality of objects included in the electronic document. (consisting of metadata in which a plurality of preset different identification tags for identifying each of the tables are recorded) is received, and when a database request command for the electronic document is received from the user terminal, the document file for the electronic document The metadata included in is read to check the plurality of identification tags.

In step S220, when the plurality of identification tags are confirmed, a management table for recording content data included in the electronic document is created.

In step S230, when the management table is created, text data for the plurality of paragraphs is extracted from the document data included in the document file for the electronic document, and text data for each paragraph is corresponding to each paragraph. The identification tags are recorded in correspondence with each other in the management table.

In step S240, after extracting entity data for the plurality of entities from the document data, entity data for each entity and identification tags corresponding to each entity are recorded in correspondence with each other in the management table.

In step S250, table data for the plurality of tables is extracted from the document data, and then table data for each table and identification tags corresponding to each table are recorded in correspondence with each other in the management table.

In step S260, when the recording of the content data included in the electronic document is completed in the management table, the document file for the electronic document is applied as input to a preset hash function to generate a first hash value, The first hash value and the management table are stored in correspondence with each other in the document database.

At this time, according to an embodiment of the present invention, in step S260, a preset number of encryption key generation functions (t is a natural number of 2 or more) and different numbers of 0 to t-1 corresponding to each encryption key generation function are used. A step of storing and maintaining an encryption key generation function table in which integers are recorded in correspondence, and when the recording of the content data included in the electronic document in the management table is completed, a random number consisting of a natural number of k (k is a natural number) digits is generated. Generating a number: When the random number is generated, a modulo operation is performed using the random number as a dividend and t as a divisor to calculate an operation value, and enter the operation value from the encryption key generation function table. Extracting a corresponding first encryption key generation function, applying a document file for the electronic document as input to the hash function to generate the first hash value, and converting the first hash value to the first encryption key Generating a first encryption key by applying it as an input to a creation function and then encrypting the management table with the first encryption key. When the management table is encrypted, the management table encrypted with the first hash value is stored in the document database. storing in correspondence with each other, and when the first hash value and the encrypted management table are stored in correspondence with each other in the document database, the random number is encrypted to the user terminal while transmitting the random number to the user terminal. It may include transmitting a guidance message indicating that it is a security code for decoding the management table.

At this time, according to one embodiment of the present invention, the method of operating the electronic document management server is to store the first hash value and the encrypted management table together in the document database, and then send the electronic document from the user terminal to the electronic document. When a document file and a first identification tag are received and a search request for content data corresponding to the first identification tag is received from the user terminal, requesting transmission of a security code to the user terminal, the user terminal When the random number is received as a security code from the user terminal, the document file for the electronic document received from the user terminal is applied as an input to the hash function to generate the first hash value, and then the first hash value is generated from the document database. Extracting the encrypted management table stored in correspondence with the hash value, once the encrypted management table is extracted, performing a modulo operation using the random number received from the user terminal as a dividend and the t as a divisor. By performing, calculating the operation value and extracting the first encryption key generation function corresponding to the operation value from the encryption key generation function table, inputting the first hash value into the first encryption key generation function generating the first encryption key and then decrypting the encrypted management table with the first encryption key; and when the encrypted management table is decrypted, the first identification tag is obtained from the decrypted management table. After extracting the recorded first content data, the step of transmitting the first content data to the user terminal may be further included.

In addition, according to an embodiment of the present invention, the method of operating the electronic document management server is that when the first hash value and the management table are stored in correspondence with each other in the document database, the first number of preset numbers from the electronic document The method may further include extracting main keywords and, once the main keywords are extracted, additionally storing the main keywords in correspondence with the first hash value in the document database.

At this time, the step of extracting the main keywords includes extracting a plurality of words inserted in the electronic document, confirming the frequency of appearance of each of the plurality of words in the electronic document, and selecting the plurality of words. selecting a preset second number of words as candidate keywords in the order of their frequency of appearance; calculating an average font size value within the electronic document for each of the second number of words selected as candidate keywords; A step of determining the median value among the average font size values of each of the second number of words and then counting the number of times each of the second number of words appears with a font size value greater than or equal to the median value in the electronic document, For each of the second number of words, by constructing a two-dimensional vector whose components include the average font size value of each word and the number of occurrences with a font size value greater than the median counted for each word, the second number generating a word vector corresponding to each of the words, and selecting as many words as the first number in order of increasing Manhattan norm of the word vector corresponding to each of the second number of words among the second number of words. It may include a step of extracting the main keywords.

At this time, according to one embodiment of the present invention, the method of operating the electronic document management server is to store the main keywords in additional correspondence with the first hash value on the document database, and then send the electronic document from the user terminal. When a document file for the electronic document is received and a request for provision of key keyword information is received from the user terminal, the document file for the electronic document received from the user terminal is applied as input to the hash function to obtain the first hash value. After creation, the step of extracting the main keywords stored in correspondence with the first hash value from the document database and transmitting the main keywords to the user terminal may be further included.

Above, the operation method of the electronic document management server according to an embodiment of the present invention has been described with reference to FIG. 2. Here, the operation method of the electronic document management server according to an embodiment of the present invention may correspond to the configuration of the operation of the electronic document management server 110 described using FIG. 1, so a detailed description thereof will be omitted. Do this.

The operating method of the electronic document management server according to an embodiment of the present invention may be implemented as a computer program stored in a storage medium to be executed through combination with a computer.

Additionally, the operating method of the electronic document management server according to an embodiment of the present invention may be implemented in the form of computer program instructions for execution through combination with a computer and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be specially designed and constructed for the present invention or may be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes optical media (magneto-optical media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described later as well as all things that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

110: Electronic document management server
111: Identification tag confirmation unit 112: Management table creation unit
113: first information record processing unit 114: second information record processing unit
115: Third information recording processing unit 116: Information storage processing unit
117: table maintenance unit 118: random number generation unit
119: Encryption key generation function extraction unit 120: Hash value generation unit
121: Management table encryption unit 122: Storage processing unit
123: Information transmission unit 124: Security code request unit
125: Management table extraction unit 126: Function extraction unit
127: Management table decoding unit 128: Content data transmission unit
129: main keyword extraction unit 130: main keyword storage unit
131: word extraction unit 132: frequency confirmation unit
133: Candidate keyword selection unit 134: Average font size value calculation unit
135: Counting unit 136: Word vector generating unit
137: Keyword extraction unit 138: Main keyword transmission unit
140: User terminal

Claims (12)

A document file for an electronic document from a user terminal - the document file for the electronic document identifies document data for the electronic document, and each of a plurality of paragraphs, a plurality of objects, and a plurality of tables included in the electronic document. It consists of metadata in which a plurality of different preset identification tags are recorded - When a database request command for the electronic document is received from the user terminal, the electronic document an identification tag confirmation unit that reads the metadata included in a document file and checks the plurality of identification tags;
a management table generator that generates a management table for recording content data included in the electronic document when the plurality of identification tags are confirmed;
When the management table is created, text data for the plurality of paragraphs is extracted from the document data included in the document file for the electronic document, and then text data for each paragraph and an identification tag corresponding to each paragraph are stored in the text data. a first information recording processing unit that records records in correspondence with each other in a management table;
a second information recording processor that extracts entity data for the plurality of entities from the document data and then records the entity data for each entity and identification tags corresponding to each entity in correspondence with each other in the management table;
a third information recording processing unit that extracts table data for the plurality of tables from the document data and records the table data for each table and identification tags corresponding to each table in correspondence with each other in the management table;
When the recording of the content data included in the electronic document is completed in the management table, the document file for the electronic document is applied as input to a preset hash function to generate a first hash value, and then the first hash value is stored in the document database. 1 an information storage processing unit that stores the hash value and the management table in correspondence with each other;
a main keyword extraction unit that extracts a preset first number of main keywords from the electronic document when the first hash value and the management table are stored in correspondence with each other in the document database; and
When the main keywords are extracted, a main keyword storage unit that additionally stores the main keywords in correspondence with the first hash value in the document database.
Including,
The main keyword extraction section
a word extraction unit that extracts a plurality of words inserted in the electronic document;
a frequency confirmation unit that checks the frequency of appearance of each of the plurality of words in the electronic document;
a candidate keyword selection unit that selects a preset second number of words from among the plurality of words in the order of their frequency of occurrence as candidate keywords;
an average font size value calculation unit that calculates an average font size value within the electronic document for each of the second number of words selected as the candidate keywords;
After checking the median of the average font size values of each of the second number of words, count the number of times each of the second number of words appears with a font size value greater than the median in the electronic document. wealth;
For each of the second number of words, by constructing a two-dimensional vector having as components the average font size value of each word and the number of occurrences with a font size value greater than the median value counted for each word, the second a word vector generator that generates a word vector corresponding to each of the number of words; and
A keyword extraction unit that extracts the first number of words as the main keywords in order of increasing Manhattan Norm of the word vector corresponding to each of the second number of words among the second number of words.
An electronic document management server that performs database processing on electronic documents based on identification tags containing. According to paragraph 1,
The information storage processing unit
Store and maintain an encryption key generation function table in which preset t (t is a natural number of 2 or more) encryption key generation functions and different integers between 0 and t-1 corresponding to each encryption key generation function are recorded. A table maintenance unit that does;
a random number generator that generates a random number composed of a natural number with k (k is a natural number) digits when the recording of the content data included in the electronic document is completed in the management table;
When the random number is generated, a modulo operation is performed using the random number as a dividend and t as a divisor to calculate an operation value, and a second number corresponding to the operation value from the encryption key generation function table. 1 An encryption key generation function extractor that extracts an encryption key generation function;
a hash value generator that generates the first hash value by applying a document file for the electronic document as input to the hash function;
a management table encryption unit that generates a first encryption key by applying the first hash value as an input to the first encryption key generation function and then encrypts the management table with the first encryption key;
When the management table is encrypted, a storage processing unit that stores the first hash value and the encrypted management table in correspondence with each other in the document database; and
When the first hash value and the encrypted management table are stored in correspondence with each other in the document database, the random number is transmitted to the user terminal and the user terminal is used to decrypt the management table in which the random number is encrypted. Information transmission unit that transmits a message indicating that it is a security code
An electronic document management server that performs database processing on electronic documents based on identification tags containing. According to paragraph 2,
After the first hash value and the encrypted management table are stored in correspondence with each other in the document database, a document file and a first identification tag for the electronic document are received from the user terminal, and the first identification tag is received from the user terminal. a security code request unit that requests transmission of a security code to the user terminal when a search request for content data corresponding to a tag is received;
When the random number is received as a security code from the user terminal, the document file for the electronic document received from the user terminal is applied as an input to the hash function to generate the first hash value, and then retrieved from the document database. a management table extraction unit that extracts the encrypted management table stored corresponding to the first hash value;
When the encrypted management table is extracted, the operation value is calculated by performing a modulo operation using the random number received from the user terminal as a dividend and t as a divisor, and the calculation value is calculated from the encryption key generation function table. a function extractor that extracts the first encryption key generation function corresponding to the operation value;
a management table decryption unit that generates the first encryption key by applying the first hash value as an input to the first encryption key generation function and then decrypts the encrypted management table with the first encryption key; and
When the encrypted management table is decrypted, a content data transmission unit extracts the first content data recorded corresponding to the first identification tag from the decrypted management table and then transmits the first content data to the user terminal.
An electronic document management server that performs database processing on electronic documents based on an identification tag further comprising: delete According to paragraph 1,
After the main keywords are additionally stored in correspondence with the first hash value in the document database, a document file for the electronic document is received from the user terminal, and a request for provision of main keyword information is received from the user terminal. Then, the document file for the electronic document received from the user terminal is applied as input to the hash function to generate the first hash value, and then the first hash value is stored in correspondence with the first hash value from the document database. A main keyword transmission unit that extracts main keywords and then transmits the main keywords to the user terminal.
An electronic document management server that performs database processing on electronic documents based on an identification tag further comprising: A document file for an electronic document from a user terminal - the document file for the electronic document identifies document data for the electronic document, and each of a plurality of paragraphs, a plurality of objects, and a plurality of tables included in the electronic document. Consisting of metadata in which a plurality of different preset identification tags are recorded - When a database request command for the electronic document is received from the user terminal, the electronic document Reading the metadata included in a document file to check the plurality of identification tags;
When the plurality of identification tags are confirmed, creating a management table for recording content data included in the electronic document;
When the management table is created, text data for the plurality of paragraphs is extracted from the document data included in the document file for the electronic document, and text data for each paragraph and an identification tag corresponding to each paragraph are stored in the text data. Steps of recording in correspondence with each other in a management table;
extracting entity data for the plurality of entities from the document data, and then recording entity data for each entity and identification tags corresponding to each entity in correspondence with each other in the management table;
extracting table data for the plurality of tables from the document data, and then recording table data for each table and identification tags corresponding to each table in correspondence with each other in the management table;
When the recording of the content data included in the electronic document is completed in the management table, the document file for the electronic document is applied as input to a preset hash function to generate a first hash value, and then the first hash value is stored in the document database. 1: storing the hash value and the management table in correspondence with each other;
When the first hash value and the management table are stored in correspondence with each other in the document database, extracting a first preset number of main keywords from the electronic document; and
When the main keywords are extracted, additionally storing the main keywords in correspondence with the first hash value in the document database.
Including,
The step of extracting the main keywords is
extracting a plurality of words inserted in the electronic document;
confirming the frequency of appearance of each of the plurality of words in the electronic document;
selecting a preset second number of words from among the plurality of words in the order of their frequency of appearance as candidate keywords;
calculating an average font size value within the electronic document for each of the second number of words selected as the candidate keywords;
Checking the median among the average font sizes of each of the second number of words and then counting the number of times each of the second number of words appears with a font size greater than the median in the electronic document;
For each of the second number of words, by constructing a two-dimensional vector having as components the average font size value of each word and the number of occurrences with a font size value greater than the median value counted for each word, the second generating a word vector corresponding to each of the number of words; and
Extracting as many words as the first number as the main keywords in order of increasing Manhattan Norm of the word vector corresponding to each of the second number of words among the second number of words.
A method of operating an electronic document management server that performs database processing on electronic documents based on an identification tag including. According to clause 6,
The saving step is
Store and maintain an encryption key generation function table in which preset t (t is a natural number of 2 or more) encryption key generation functions and different integers between 0 and t-1 corresponding to each encryption key generation function are recorded. steps;
When recording the content data included in the electronic document in the management table is completed, generating a random number consisting of a natural number with k (k is a natural number) digits;
When the random number is generated, a modulo operation is performed using the random number as a dividend and t as a divisor to calculate an operation value, and a second number corresponding to the operation value from the encryption key generation function table. 1 extracting an encryption key generation function;
Generating the first hash value by applying a document file for the electronic document as input to the hash function;
Generating a first encryption key by applying the first hash value as an input to the first encryption key generation function and then encrypting the management table with the first encryption key;
When the management table is encrypted, storing the first hash value and the encrypted management table in correspondence with each other in the document database; and
When the first hash value and the encrypted management table are stored in correspondence with each other in the document database, the random number is transmitted to the user terminal and the user terminal is used to decrypt the management table in which the random number is encrypted. Step of transmitting an information message indicating that it is a security code
A method of operating an electronic document management server that performs database processing on electronic documents based on an identification tag including. In clause 7,
After the first hash value and the encrypted management table are stored in correspondence with each other in the document database, a document file and a first identification tag for the electronic document are received from the user terminal, and the first identification tag is received from the user terminal. When a search request for content data corresponding to a tag is received, requesting transmission of a security code to the user terminal;
When the random number is received as a security code from the user terminal, the document file for the electronic document received from the user terminal is applied as input to the hash function to generate the first hash value, and then retrieved from the document database. extracting the encrypted management table stored corresponding to the first hash value;
When the encrypted management table is extracted, the operation value is calculated by performing a modulo operation using the random number received from the user terminal as a dividend and t as a divisor, and the calculation value is calculated from the encryption key generation function table. extracting the first encryption key generation function corresponding to the operation value;
applying the first hash value as an input to the first encryption key generation function to generate the first encryption key and then decrypting the encrypted management table with the first encryption key; and
When the encrypted management table is decrypted, extracting first content data recorded corresponding to the first identification tag from the decrypted management table, and then transmitting the first content data to the user terminal.
A method of operating an electronic document management server that performs database processing on electronic documents based on an identification tag further comprising: delete According to clause 6,
After the main keywords are additionally stored in correspondence with the first hash value in the document database, a document file for the electronic document is received from the user terminal, and a request for provision of main keyword information is received from the user terminal. Then, the document file for the electronic document received from the user terminal is applied as input to the hash function to generate the first hash value, and then the first hash value is stored in correspondence with the first hash value from the document database. Extracting main keywords and then transmitting the main keywords to the user terminal
A method of operating an electronic document management server that performs database processing on electronic documents based on an identification tag further comprising: A computer-readable recording medium recording a computer program for executing the method of any one of claims 6, 7, 8, or 10 through combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6, 7, 8, or 10 through combination with a computer.

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