KR20230124206A - Document management service server for managing document files based on location information, and the operating method thereof - Google Patents

Abstract

A document management service server and an operating method thereof are disclosed. The present invention provides the document management service server and the operating method thereof that allow access to a corresponding document file only at a location close to a location where a document file is generated, thereby solving an exposure problem of the document file by a third party located in a different spot of the outside which is not a spot where the document film is generated.

Description

Document management service server for managing document files based on location information and its operating method

The present invention relates to a document management service server for managing document files based on location information and an operation method thereof.

BACKGROUND ART [0002] Recently, as the number of businesses using electronic documents increases in corporations and public institutions, various services for enhancing user convenience using electronic documents have emerged.

Meanwhile, among these various electronic document related services, in a document management service for storing and managing a plurality of document files in a database, a user can search for a desired document file among a plurality of document files stored in a database. In many cases, it supports a document file search function that supports

In this regard, existing document management services generally provide a document file search function that allows a user to search for a document file based on a search word entered. In such a document management service, a document on a database By matching and storing files and the location information of the point where each document file was created, the user can search for a document file having location information of a point close to the location information based on the location information of the point where the user is currently located. If it is possible to provide a document file search function to search for documents, it will be possible to further increase user convenience.

In addition, electronic documents produced by corporations or public institutions are often security documents that are prohibited from being accessed from the outside. Access to these electronic documents is limited to points close to the location where each electronic document was created. In view of the need to make it possible, it is necessary to introduce a document management service that allows users to search for document files accessible to them based on location information and to receive the document files.

In this regard, when storing document files in a database, location information on the point where each document file was created is stored together in correspondence with the document file, thereby introducing a technology capable of managing document files based on location information can be considered.

That is, when new document files are created as users create electronic documents, location information of the point where each document file is created and each document file are stored in a document file database in correspondence with each other, so that they can be easily identified by other users later. When a search request for document files accessible from the current location is received, only document files having location information close to the user's location are searched from the document file database, and search results are provided to the user. , When a request for provision of a specific document file among the document files included in the search result is received from the user, introduction of a document management service capable of providing the user with the corresponding document file may be considered.

If such a location-based document management service is introduced, since access to the document file is not possible at a point other than the point where each document file was created, hooking of the document file by an external third party Security problems can be solved.

The present invention provides a document management service server and its operation method that allow access to a document file only from a location close to the location where the document file is created, and is located at a point other than the point where the document file is created. It helps to solve the problem of exposure of document files by third parties.

A document management service server for managing document files based on location information according to an embodiment of the present invention stores a plurality of document files and location information of a point where each of the plurality of document files was created in correspondence with each other. A first location information request requesting transmission of the current location information of the first user terminal to the first user terminal when a location information-based document file search request is received from the document file database and the first user terminal. Optionally, when first location information is received from the first user terminal, a document file having location information within a preset reference radius from the first location information among the plurality of document files stored in the document file database. A document file search unit for searching whether a document file exists and a document file having location information within the reference radius from the first location information among the plurality of document files stored in the document file database, at least one If it is found that a document file exists, a search result list composed of the file names of each of the at least one document file is created, and then the search result list is designated as a search result for the document file search request by the first user. and a search result transmission unit for transmitting to a terminal.

In addition, a method of operating a document management service server for managing document files based on location information according to an embodiment of the present invention includes location information of a plurality of document files and a point where each of the plurality of document files is created. Maintaining a document file database in which are stored in correspondence with each other, when a location information-based document file search request is received from a first user terminal, the current location information of the first user terminal is sent to the first user terminal. Requesting transmission, when the first location information is received from the first user terminal, location information within a predetermined reference radius from the first location information among the plurality of document files stored in the document file database Searching whether a document file having a document file exists, and among the plurality of document files stored in the document file database, a document file having location information within the reference radius from the first location information, at least one If it is found that the document files exist, a search result list consisting of the file names of each of the at least one document file is created, and then the search result list is designated as a search result for the document file search request, so that the first document file is searched for. and transmitting to a user terminal.

The present invention provides a document management service server and its operation method that allow access to a document file only from a location close to the location where the document file is created, and is located at a point other than the point where the document file is created. It is possible to solve the problem of exposure of document files by third parties.

1 is a diagram showing the structure of a document management service server for managing document files based on location information according to an embodiment of the present invention.
2 is a flowchart illustrating an operating method of a document management service server for managing document files based on location information according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. While describing each drawing, similar reference numerals have been used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are common knowledge in the art to which the present invention belongs. has the same meaning as commonly understood by the person who has it.

In this document, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. In addition, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, ASICs (Application Specific Integrated Circuits), and may be implemented separately or two or more may be integrated into one.

On the other hand, the blocks of the accompanying block diagram or the steps of the flowchart are computer program instructions that perform designated functions by being loaded into a processor or memory of a device capable of data processing, such as a general-purpose computer, a special purpose computer, a portable notebook computer, and a network computer. can be interpreted as meaning Since these computer program instructions may be stored in a memory included in a computer device or in a computer readable memory, the functions described in blocks of a block diagram or steps of a flowchart are produced as a product containing instruction means for performing them. It could be. Further, 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). Also, it should be noted that in some alternative embodiments, functions mentioned in blocks or steps may be executed out of a predetermined 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 a document management service server for managing document files based on location information according to an embodiment of the present invention.

Referring to FIG. 1, a document management service server 110 according to an embodiment of the present invention includes a document file database 111, a first location information request unit 112, a document file search unit 113, and transmission of search results. includes section 114.

In the document file database 111, a plurality of document files and location information of a point where each of the plurality of document files was created are stored in correspondence with each other.

For example, the document file database 111 may store a plurality of document files as shown in Table 1 below, and location information of points where each of the plurality of document files was created in correspondence with each other.

multiple document files location information document file 1 location information 1 document file 2 location information 2 document file 3 location information 3 document file 4 location information 4 document file 5 location information 5 ... ...

When receiving a location information-based document file search request from the first user terminal 131, the first location information requesting unit 112 sends the current location of the first user terminal 131 to the first user terminal 131. request the transmission of information;

When the first location information is received from the first user terminal 131, the document file search unit 113 sets a preset value from the first location information among the plurality of document files stored in the document file database 111. It is searched whether a document file having location information within a reference radius exists.

The search result transmission unit 114 is a document file having location information within the reference radius from the first location information among the plurality of document files stored in the document file database 111, and includes at least one document file. If it is found that exists, a search result list consisting of the file names of each of the at least one document file is created, and then the search result list is designated as a search result for the document file search request so that the first user terminal 131 ) is sent to

Hereinafter, operations of the first location information requesting unit 112, the document file search unit 113, and the search result transmission unit 114 will be described in detail, for example.

First, it is assumed that the preset reference radius is '100m' and the document management service server 110 receives a document file search request based on location information from the first user terminal 131 .

Then, the first location information requesting unit 112 may request transmission of current location information of the first user terminal 131 to the first user terminal 131 .

Correspondingly, when it is assumed that the document management service server 110 receives 'location information 6' from the first user terminal 131, the document file search unit 113 searches the document file database 111 as shown in Table 1 above. ) Among the plurality of document files stored in 'document file 1, document file 2, document file 3, document file 4, document file 5, ...', within a radius of '100m' from 'location information 6' It is possible to search whether a document file having location information exists.

As a result, among 'document file 1, document file 2, document file 3, document file 4, document file 5, ...', a document file having location information within a radius of '100m' from 'location information 6', Assume that 'document file 2, document file 3, and document file 5' are found to exist.

At this time, when the file names of 'document file 2, document file 3, and document file 5' are 'file name 2, file name 3, and file name 5', the search result transmission unit 114 lists the search results as shown in Table 2 below. After generating, a search result list as shown in Table 2 below may be designated as a search result for the document file search request and transmitted to the first user terminal 131 .

List of search results file name 2 file name 3 file name 5

According to one embodiment of the present invention, the document management service server 110 may further include a first IP address verification unit 115, a first location information verification unit 116, and a document file transmission unit 117. .

After the search result list is transmitted to the first user terminal 131 by the search result transmitter 114, the first IP address verification unit 115 receives the at least one document from the first user terminal 131. When a transmission request for a first document file, which is one of the files, is received, a first IP (Internet Protocol) address assigned to the first user terminal 131 is checked.

When the first IP address is confirmed by the first IP address verification unit 115, the first location information checking unit 116 sends a preset IP address location tracking service server 140 to the first IP address according to the first IP address. When provision of location information is requested and second location information is received as location information according to the first IP address from the IP address location tracking service server 140, there is a gap between the first location information and the second location information. It is checked whether the separation distance is within a preset reference distance.

Hereinafter, operations of the first IP address verification unit 115 and the first location information verification unit 116 will be described in detail, for example.

First, the preset reference distance is set to '50m', and, as in the above example, the search result list shown in Table 2 is transmitted to the first user terminal 131 by the search result transmission unit 114, After that, it is assumed that the document management service server 110 receives a transmission request for 'document file 3' from the first user terminal 131 .

Then, the first IP address checking unit 115 can check the first IP address assigned to the first user terminal 131 .

As a result, when it is determined that the first IP address assigned to the first user terminal 131 is identified as 'IP address 1', the first location information checking unit 116 sets the preset IP address location tracking service server. In step 140, provision of location information according to 'IP address 1' may be requested.

Correspondingly, when it is assumed that the document management service server 110 receives 'location information 7' as location information according to 'IP address 1' from the IP address location tracking service server 140, the first location information is checked. The unit 116 may check whether the separation distance between 'location information 6' and 'location information 7' is within '50m'.

In this way, as a result of the first location information checking unit 116 checking whether or not the separation distance between the first location information and the second location information is within the reference distance, the first location information and the second location information If it is determined that the distance between the two is within the reference distance, the document file transmission unit 117 extracts the first document file from the document file database 111 and transmits the first document file to the first user terminal 131 .

At this time, according to one embodiment of the present invention, when the document file transmission unit 117 transmits the first document file to the first user terminal 131, in order to prevent the first document file from being exposed to others. , The first document file may be encrypted and transmitted to the first user terminal 131 .

In this regard, according to an embodiment of the present invention, the document file transmission unit 117 has a specific configuration for encrypting the first document file and transmitting it to the first user terminal 131, and the table maintenance unit 118 , an encryption event generator 119, a serial number extraction unit 120, an operation code generator 121, a polynomial generator 122, an encryption key generator 123, and an encryption transmission unit 124. there is.

The table maintenance unit 118 stores and maintains a reference position information table previously shared with the first user terminal 131 .

Here, the reference position information table includes a table in which a plurality of preset reference position information and a pre-allocated serial number of k (k is a natural number equal to or greater than 2) digits for each of the plurality of reference position information are recorded. it means.

For example, when k is set to '3', the table maintenance unit 118 may store and maintain a reference position information table such as Table 3 below.

A plurality of reference position information Serial Number Reference position information 1 175 Reference position information 2 429 Reference position information 3 386 Reference position information 4 640 Reference position information 5 936 ... ...

When it is confirmed that the separation distance between the first location information and the second location information is within the reference distance, the encryption event generating unit 119 extracts the first document file from the document file database 111, and then the second location information. 1 Generates an encryption event to encrypt and transmit a document file.

When the encryption event is generated by the encryption event generating unit 119, the serial number extraction unit 120 determines the closest distance to the first location information among the plurality of pieces of standard location information from the standard location information table. 1 reference position information is checked, a first serial number for the first reference position information is extracted, and second reference position information of the furthest distance from the first position information is identified among the plurality of reference position information , A second serial number for the second reference position information is extracted.

When the first serial number and the second serial number are extracted by the serial number extraction unit 120, the operation code generation unit 121 modulo for each of the k numbers constituting the first serial number ( A k-bit first operation code is generated by configuring the resultant value when the modulo)-2 operation is performed as a bit string, and a modulo-2 operation is performed for each of the k numbers constituting the second serial number. A k-bit second operation code is generated by constructing a resultant value when the operation is performed as a bit string.

Here, the modulo-2 operation means an operation of dividing a dividend by 2 and calculating a remainder thereto.

When the first operation code and the second operation code are generated by the operation code generation unit 121, the polynomial generation unit 122 converts each coefficient of a binary polynomial having the highest degree k-1 into the first operation code. A first polynomial is generated by specifying k bit values constituting a code, and each coefficient of a binary polynomial having a highest degree k-1 is designated by k bit values constituting the second operation code. Generates the second polynomial.

When the first polynomial and the second polynomial are generated by the polynomial generator 122, the encryption key generator 123 multiplies the first polynomial and the second polynomial to obtain 2, the highest order being 2k-2. After generating an operation polynomial that is a binary polynomial, a 2k-1 bit seed code is generated by configuring each coefficient of the operation polynomial as a bit string, and then the seed code is input to a preset encryption key generation function. and generates a first encryption key.

When the first encryption key is generated by the encryption key generator 123, the encryption transmission unit 124 generates a first encryption file by encrypting the first document file with the first encryption key, and then generates the first encryption file. The encryption file and the encryption key generating function are transmitted to the first user terminal 131 .

Hereinafter, operations of the encryption event generation unit 119, the serial number extraction unit 120, the operation code generation unit 121, the polynomial generation unit 122, the encryption key generation unit 123, and the encryption transmission unit 124 will be described. For example, it will be described in detail.

First, it is assumed that the coefficient of each binary polynomial used in the present invention is a concept including the coefficient of the 0th order term.

In this situation, as in the above example, as a result of checking whether the distance between the 'location information 6' and the 'location information 7' is within the reference distance '50 m', the first location information checking unit 116 checks, Assume that it is confirmed that the separation distance between 'Location Information 6' and 'Location Information 7' is within '50m'.

Then, the encryption event generation unit 119 may extract 'document file 3' from the document file database 111 as shown in Table 1, and then generate an encryption event to encrypt and transmit the 'document file 3'.

Then, the serial number extraction unit 120 selects the plurality of pieces of reference location information from the reference location information table as shown in Table 3, 'reference location information 1, reference location information 2, reference location information 3, reference location information 4, Among reference position information 5, ...', it is possible to check first reference position information closest to 'position information 6'.

As a result, the first reference position information closest to 'position information 6' among 'reference position information 1, reference position information 2, reference position information 3, reference position information 4, reference position information 5, ...' If it is confirmed that the 'reference position information 5' is confirmed, the serial number extraction unit 120 may extract '936', which is a serial number for the 'reference position information 5', as the first serial number.

In addition, the serial number extractor 120 extracts the plurality of pieces of reference location information from the reference location information table as shown in Table 3, 'reference location information 1, reference location information 2, reference location information 3, reference location information 4, Among the reference position information 5, ...', 'position information 6' and the first reference position information of the farthest distance may be checked.

As a result, among 'reference position information 1, reference position information 2, reference position information 3, reference position information 4, reference position information 5, ...', 'position information 6' and the second reference position information furthest from each other are If it is confirmed that the 'reference position information 1' is confirmed, the serial number extraction unit 120 may extract '175', which is a serial number for the 'standard position information 1', as the second serial number.

Then, the operation code generation unit 121 configures the result value when performing the modulo-2 operation on each of the '3' numbers constituting the first serial number '936' as a bit string to ' A 3'-bit first operation code may be generated as '110'.

In addition, the operation code generation unit 121 configures the result value when performing the modulo-2 operation on each of the '3' numbers constituting the second serial number '175' as a bit string to ' A 3'-bit second operation code may be generated as '111'.

Then, the polynomial generator 122 generates the first polynomial by designating each coefficient of the binary polynomial whose highest degree is '2' as '3' bit values constituting '110', which is the first operation code. ' ', and each coefficient of the binary polynomial having the highest degree '2' is designated as '3' bit values constituting '111', which is the second operation code, so that the second polynomial is ' ' can be created.

Then, the encryption key generation unit 123 is the first polynomial ' ' and the second polynomial ' ' can be multiplied with each other to generate an operational polynomial, which is a binary polynomial whose highest degree is '4'.

Here, when the encryption key generator 123 generates the operation polynomial, since each coefficient of the operation polynomial must be subtracted as a binary value, the polynomial generated by multiplying the first polynomial and the second polynomial with each other For each coefficient, a result value obtained when a modulo-2 operation is performed may be calculated as each coefficient of the operation polynomial.

Eventually, the encryption key generator 123 converts the operation polynomial to ' ' can be created.

Then, the encryption key generation unit 123 generates a '5'-bit seed code such as '10010' by constructing '1, 0, 0, 1, 0', each coefficient of the operation polynomial, into a bit string. can do.

Thereafter, the encryption key generation unit 123 may generate 'encryption key 1' by applying the seed code '10010' as an input to a preset encryption key generation function.

In this case, according to an embodiment of the present invention, the encryption key generating function may be a predetermined hash function.

Then, the encryption transmission unit 124 generates 'encryption file 1' by encrypting 'document file 3' with 'encryption key 1', and then converts 'encryption file 1' and the encryption key generation function to the first user terminal. (131).

At this time, according to an embodiment of the present invention, the first user terminal 131 stores the reference position information table in a memory, and the first encryption file and the encryption key are stored from the document management service server 110. When the generating function is received, the first serial number and the second serial number are extracted from the reference position information table stored in the memory based on the first position information, and the first serial number and the second serial number are extracted. After generating the seed code based on a second serial number, generating the first encryption key by applying the seed code as an input to the encryption key generation function, and then decrypting the first encryption file with the first encryption key By doing so, the first document file can be restored.

Specifically, according to one embodiment of the present invention, when the first user terminal 131 receives the first encryption file and the encryption key generation function from the document management service server 110, they are stored in the memory The first reference position information having the closest distance to the first position information among the plurality of pieces of reference position information is checked from the reference position information table, and the first serial number for the first reference position information is obtained. extracting, checking the second reference location information of the furthest distance from the first location information among the plurality of pieces of reference location information, extracting the second serial number for the second reference location information, and then extracting the second reference location information; 1 The first operation code of k bits is generated by configuring the resultant value when the modulo-2 operation is performed on each of the k numbers constituting the serial number as a bit string, and the second serial number is formed. After generating the second operation code of k bits by configuring the result value when performing the modulo-2 operation on each of the k numbers of The first polynomial is generated by designating each coefficient as k bit values constituting the first operation code, and each coefficient of the binary polynomial having the highest degree k-1 constitutes the second operation code. After generating the second polynomial by specifying k bit values, the first polynomial and the second polynomial are multiplied with each other to generate the operation polynomial that is a binary polynomial whose highest degree is 2k-2, After generating the seed code of 2k-1 bits by constructing each coefficient of the operation polynomial into a bit string, the first encryption key is generated by applying the seed code as an input to the encryption key generation function, and the first encryption key is generated. When an encryption key is generated, the first document file may be restored by decrypting the first encryption file with the first encryption key.

Hereinafter, the operation of the first user terminal 131 will be described in detail, for example.

First, as in the above example, k is set to '3', and a reference location information table such as Table 3 previously shared with the document management service server 110 is stored in the memory of the first user terminal 131. Suppose there is In addition, as in the above example, as the encryption transmission unit 124 transmits the 'encryption file 1' and the encryption key generation function to the first user terminal 131, 'encryption Assume that file 1' and the encryption key generation function are received.

Then, the first user terminal 131 selects 'reference position information 1, reference position information 2, and reference position information 3' of the plurality of reference position information from the reference position information table such as Table 3 stored in the memory. , reference position information 4, reference position information 5, ...', '936', the serial number for 'standard position information 5', by checking 'reference position information 5' closest to 'location information 6' Can be extracted as the first serial number.

In addition, the first user terminal 131 selects the plurality of pieces of reference location information from the reference location information table as shown in Table 3, such as 'reference location information 1, reference location information 2, reference location information 3, reference location information 4, reference 'Location information 6' among 'location information 5, ...' and 'standard location information 1' of the farthest distance are checked, and '175', which is the serial number for 'standard location information 1', is set as the second serial number. can be extracted.

Then, the first user terminal 131 configures the result value when performing the modulo-2 operation on each of the '3' numbers constituting the first serial number '936' as a bit string, The first operation code of '3' bits may be generated as '110', and a modulo-2 operation is performed on each of the '3' numbers constituting the second serial number '175'. The second operation code of '3' bits, such as '111', can be generated by configuring the resultant value of the time as a bit string.

After that, the first user terminal 131 designates each coefficient of a binary polynomial having a highest degree of '2' as '3' bit values constituting '110', which is the first operation code. 1 polynomial ' ', and the second polynomial is obtained by designating each coefficient of the binary polynomial having the highest degree '2' as '3' bit values constituting '111', which is the second operation code. ' ' can be created.

Then, the first user terminal 131 is the first polynomial ' ' and the second polynomial ' The operation polynomial, which is a binary polynomial whose highest degree is '4' by multiplying ' with each other, is ' ' can be created.

After that, the first user terminal 131 constructs '1, 0, 0, 1, 0', each coefficient of the operation polynomial, into a bit string, so that the seed code of '5' bits is '10010'. can create

Then, the first user terminal 131 may generate 'encryption key 1' by applying the seed code '10010' as an input to the encryption key generation function.

At this time, according to the above example, 'encryption file 1' is an encryption file generated by encrypting 'document file 3' with 'encryption key 1', so the first user terminal 131 converts 'encryption file 1' to 'encryption file 1'. By decrypting with encryption key 1', 'document file 3' can be restored normally.

According to one embodiment of the present invention, the document management service server 110 includes a second location information requesting unit 125, a second IP address checking unit 126, a second location information checking unit 127 and document file storage. A processing unit 128 may be further included.

When a second document file for a new electronic document created in the second user terminal 132 is received from the second user terminal 132, the second location information requesting unit 125 requests storage of the second document file. When the command is received, transmission of the current location information of the second user terminal 132 is requested to the second user terminal 132 .

When third location information is received from the second user terminal 132 , the second IP address checking unit 126 checks the second IP address assigned to the second user terminal 132 .

When the second IP address is confirmed by the second IP address verification unit 126, the second location information checking unit 127 sends location information according to the second IP address to the IP address location tracking service server 140. When fourth location information is received as location information according to the second IP address from the IP address location tracking service server 140 by requesting provision of, the separation distance between the third location information and the fourth location information A, it is checked whether it is within the above reference distance.

When it is determined that the separation distance between the third location information and the fourth location information is within the reference distance, the document file storage processing unit 128 associates the second document file with the third location information to a document file database. Save to (111).

Hereinafter, operations of the second location information requesting unit 125, the second IP address checking unit 126, the second location information checking unit 127, and the document file storage processing unit 128 will be described in detail by way of example. do it with

First, as in the foregoing example, the reference distance is set to '50 m', and the document management service server 110 from the second user terminal 132 to the new electronic document created in the second user terminal 132 ' Assume that a storage request command for 'document file 6' is received while document file 6' is received.

Then, the second location information requesting unit 125 may request transmission of the current location information of the second user terminal 132 to the second user terminal 132 .

Correspondingly, when it is determined that the document management service server 110 has received 'location information 8' from the second user terminal 132, the second IP address verification unit 126 informs the second user terminal 132 It is possible to check the assigned second IP address.

As a result, when it is determined that the second IP address allocated to the second user terminal 132 is confirmed as 'IP address 2', the second location information checker 127 determines the IP address location tracking service server 140 ), it is possible to request provision of location information according to 'IP address 2'.

Correspondingly, when it is said that the document management service server 110 receives 'location information 9' as location information according to 'IP address 2' from the IP address location tracking service server 140, second location information is checked. The unit 127 may check whether the separation distance between 'location information 8' and 'location information 9' is within '50m'.

As a result, when it is confirmed that the separation distance between 'location information 8' and 'location information 9' is within '50m', the document file storage processing unit 128 displays 'document file 6' as shown in Table 4 below. and 'location information 8' can be stored in the document file database 111 as shown in Table 1 above.

multiple document files location information document file 1 location information 1 document file 2 location information 2 document file 3 location information 3 document file 4 location information 4 document file 5 location information 5 ... ... document file 6 location information 8

2 is a flowchart illustrating an operating method of a document management service server for managing document files based on location information according to an embodiment of the present invention.

In step S210, a document file database is maintained in which a plurality of document files and location information of points where each of the plurality of document files is generated are stored in correspondence with each other.

In step S220, when a location information-based document file search request is received from the first user terminal, transmission of current location information of the first user terminal is requested to the first user terminal.

In step S230, when the first location information is received from the first user terminal, location information within a predetermined reference radius from the first location information among the plurality of document files stored in the document file database. Searches whether a document file with

In step S240, it is searched for a document file having location information within the reference radius from the first location information among the plurality of document files stored in the document file database, and that at least one document file exists. After generating a search result list composed of the file names of each of the at least one document file, the search result list is designated as a search result for the document file search request and transmitted to the first user terminal.

At this time, according to an embodiment of the present invention, the operating method of the document management service server may include, after the search result list is transmitted to the first user terminal, any one of the at least one document file from the first user terminal. When a transmission request for one first document file is received, checking a first IP address allocated to the first user terminal, and when the first IP address is confirmed, to a preset IP address location tracking service server. , When requesting provision of location information according to the first IP address and receiving second location information as location information according to the first IP address from the IP address location tracking service server, the first location information and Checking whether the separation distance between the second location information is within a preset reference distance, and if it is confirmed that the separation distance between the first location information and the second location information is within the reference distance, the document file The method may further include extracting the first document file from the database and transmitting it to the first user terminal.

At this time, according to an embodiment of the present invention, the step of extracting the first document file and transmitting the first document file to the first user terminal includes a reference position information table previously shared with the first user terminal (the reference position information table is , Storing and maintaining a table in which a plurality of preset reference position information and a serial number of pre-allocated k (k is a natural number equal to or greater than 2) digits for each of the plurality of reference position information are recorded; Encryption for encrypting and transmitting the first document file after extracting the first document file from the document file database when it is confirmed that the separation distance between the first location information and the second location information is within the reference distance. Generating an event, when the encryption event occurs, checking first reference location information having a closest distance to the first location information among the plurality of pieces of reference location information from the reference location information table; A first serial number of reference position information is extracted, and second reference position information of the furthest distance from the first position information is identified among the plurality of pieces of reference position information, and second reference position information of the second reference position information is obtained. Extracting the serial number, when the first serial number and the second serial number are extracted, a resultant value obtained by performing a modulo-2 operation on each of the k numbers constituting the first serial number A first operation code of k bits is generated by constructing a bit string, and a result value obtained when a modulo-2 operation is performed on each of the k numbers constituting the second serial number is formed into a bit string to k Generating a second operation code of bits, when the first operation code and the second operation code are generated, each coefficient of a binary polynomial having a highest degree k-1 is k constituting the first operation code A first polynomial is generated by specifying bit values, and a second polynomial is generated by specifying each coefficient of a binary polynomial whose highest degree is k-1 with k bit values constituting the second operation code. When the first polynomial and the second polynomial are generated, the first polynomial and the second polynomial are multiplied to generate an operating polynomial that is a binary polynomial having a highest degree of 2k-2, and then the operating polynomial Generating a 2k-1 bit seed code by configuring each coefficient of as a bit string, and then generating a first encryption key by applying the seed code as an input to a preset encryption key generation function, and the first encryption key is generated, generating a first encryption file by encrypting the first document file with the first encryption key, and then transmitting the first encryption file and the encryption key generation function to the first user terminal. The first user terminal stores the reference location information table in a memory, and when the first encryption file and the encryption key generating function are received from the document management service server, the first location information Based on this, the first serial number and the second serial number are extracted from the reference position information table stored in the memory, and the seed code is generated based on the first serial number and the second serial number. The first document file may be restored by applying the seed code as an input to the encryption key generation function to generate the first encryption key, and then decrypting the first encryption file with the first encryption key. .

At this time, according to an embodiment of the present invention, the first user terminal receives the first encryption file and the encryption key generation function from the document management service server, the reference location information stored in the memory. From the table, the first reference position information having a closest distance to the first position information among the plurality of reference position information is identified, the first serial number for the first reference position information is extracted, and the plurality of reference position information is extracted. Among the pieces of reference position information, the second reference position information of the farthest distance from the first position information is identified, the second serial number for the second reference position information is extracted, and the first serial number is configured. The first operation code of k bits is generated by constructing a resultant value when a modulo-2 operation is performed on each of the k numbers in a bit string, and the k numbers constituting the second serial number After generating the k-bit second operation code by configuring the resultant value when the modulo-2 operation is performed on each of them into a bit string, each coefficient of the binary polynomial having the highest order k-1 is The first polynomial is generated by specifying k bit values constituting the first operation code, and each coefficient of the binary polynomial having the highest order k-1 is k bit values constituting the second operation code. After generating the second polynomial by specifying , the first polynomial and the second polynomial are multiplied with each other to generate the operation polynomial that is a binary polynomial whose highest degree is 2k-2, and each coefficient of the operation polynomial is generated. After generating the seed code of 2k-1 bits by configuring as a bit string, applying the seed code as an input to the encryption key generation function to generate the first encryption key, and when the first encryption key is generated , The first document file may be restored by decrypting the first encrypted file with the first encryption key.

In addition, according to an embodiment of the present invention, the method of operating the document management service server may include receiving a second document file for a new electronic document created in the second user terminal from a second user terminal, and receiving the second document file. requesting transmission of current location information of the second user terminal to the second user terminal when a command to store a file is received; when third location information is received from the second user terminal, the second user terminal Checking a second IP address allocated to the user terminal, if the second IP address is confirmed, requesting the IP address location tracking service server to provide location information according to the second IP address, When fourth location information is received as location information according to the second IP address from the address location tracking service server, it is determined whether the separation distance between the third location information and the fourth location information is within the reference distance. and if it is confirmed that the separation distance between the third location information and the fourth location information is within the reference distance, storing the second document file in the document file database in correspondence with the third location information. may further include.

In the above, a method of operating a document management service server for managing document files based on location information according to an embodiment of the present invention has been described with reference to FIG. 2 . Here, since the operation method of the document management service server according to an embodiment of the present invention may correspond to the configuration of the operation of the document management service server 110 described with reference to FIG. 1, a detailed description thereof is omitted. do it with

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

In addition, the operating method of the document management service server according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the medium may be those specially designed and configured for the present invention or those known and usable to those skilled in 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 magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

110: document management service server for managing document files based on location information
111: document file database 112: first location information request unit
113: document file search unit 114: search result transmission unit
115: first IP address verification unit 116: first location information verification unit
117: document file transmission unit 118: table holding unit
119: encryption event generation unit 120: serial number extraction unit
121: operation code generator 122: polynomial generator
123: encryption key generation unit 124: encryption transmission unit
125: second location information request unit 126: second IP address verification unit
127: second location information confirmation unit 128: document file storage processing unit
131: first user terminal 132: second user terminal
140: IP address location tracking service server

Claims (12)

A document management service server for managing document files based on location information,
a document file database in which a plurality of document files and location information of points where each of the plurality of document files is created are stored in correspondence with each other;
a first location information requesting unit requesting transmission of current location information of the first user terminal to the first user terminal when a location information-based document file search request is received from the first user terminal;
When first location information is received from the first user terminal, among the plurality of document files stored in the document file database, a document file having location information within a preset reference radius from the first location information exists. a document file search unit for searching whether or not; and
Among the plurality of document files stored in the document file database, if it is found that at least one document file exists among the document files having location information within the reference radius from the first location information, the at least one document file is found to exist. After creating a search result list composed of file names of each of the document files, the search result transmission unit designates the search result list as a search result for the document file search request and transmits the search result list to the first user terminal.
A document management service server comprising a. According to claim 1,
After the search result list is transmitted to the first user terminal, when a transmission request for a first document file, which is any one of the at least one document file, is received from the first user terminal, the first user terminal a first IP address checking unit that checks an assigned first IP (Internet Protocol) address;
When the first IP address is identified, a request is made to a preset IP address location tracking service server to provide location information according to the first IP address, and from the IP address location tracking service server, location information according to the first IP address is requested. When second location information is received as location information, a first location information checking unit that checks whether a separation distance between the first location information and the second location information is within a predetermined reference distance; and
If it is confirmed that the separation distance between the first location information and the second location information is within the reference distance, the document file transmission unit extracts the first document file from the document file database and transmits it to the first user terminal.
A document management service server further comprising a. According to claim 2,
The document file transfer unit
Reference position information table previously shared with the first user terminal - The reference position information table includes a plurality of preset reference position information and a pre-allocated k for each of the plurality of reference position information (k is 2 a table holding unit that stores and maintains a table in which serial numbers of digits are recorded;
Encryption for encrypting and transmitting the first document file after extracting the first document file from the document file database when it is confirmed that the separation distance between the first location information and the second location information is within the reference distance. an encryption event generation unit generating an event;
When the encryption event occurs, first reference position information having a closest distance to the first position information among the plurality of reference position information is checked from the reference position information table, and the first reference position information for the first reference position information is determined. 1 A series of extracting a serial number, identifying second reference location information of the furthest distance from the first location information among the plurality of pieces of reference location information, and extracting a second serial number for the second reference location information. number extraction unit;
When the first serial number and the second serial number are extracted, the result value when a modulo-2 operation is performed on each of the k numbers constituting the first serial number is configured as a bit string. By doing so, a first operation code of k bits is generated, and a resultant value obtained when a modulo-2 operation is performed on each of the k numbers constituting the second serial number is configured as a bit string, thereby forming a second operation code of k bits. an operation code generation unit that generates an operation code;
When the first operation code and the second operation code are generated, the first polynomial is obtained by designating each coefficient of a binary polynomial having the highest order k-1 as k bit values constituting the first operation code. a polynomial generator for generating a second polynomial by designating each coefficient of a binary polynomial having a highest degree k-1 as k bit values constituting the second operation code;
When the first polynomial and the second polynomial are generated, the first polynomial and the second polynomial are multiplied to generate an operating polynomial that is a binary polynomial having a highest degree of 2k-2, and then each coefficient of the operating polynomial is generated. An encryption key generation unit generating a 2k-1 bit seed code by constructing a bit string and then applying the seed code as an input to a preset encryption key generation function to generate a first encryption key; and
When the first encryption key is generated, a first encryption file is generated by encrypting the first document file with the first encryption key, and then the first encryption file and the encryption key generation function are transmitted to the first user terminal. encryption transmission unit
including,
The first user terminal is
When the standard location information table is stored in a memory and the first encryption file and the encryption key generation function are received from the document management service server, they are stored in the memory based on the first location information The first serial number and the second serial number are extracted from the reference location information table, the seed code is generated based on the first serial number and the second serial number, and the seed code is converted into the encryption key. The document management service server of claim 1 , wherein the document management service server restores the first document file by applying an input to a generating function to generate the first encryption key and then decrypting the first encryption file with the first encryption key. According to claim 3,
The first user terminal is
When the first encryption file and the encryption key generating function are received from the document management service server, the first location information among the plurality of pieces of standard location information and the standard location information from the standard location information table stored in the memory. The first reference location information of the closest distance is identified, the first serial number for the first reference location information is extracted, and the first reference location information and the furthest distance from among the plurality of pieces of reference location information are identified. When the second reference location information is checked, the second serial number for the second reference location information is extracted, and then a modulo-2 operation is performed on each of the k numbers constituting the first serial number. The first operation code of k bits is generated by configuring the result value of as a bit string, and the result value when the modulo-2 operation is performed on each of the k numbers constituting the second serial number is bit. After generating the second operation code of k bits by configuring it as a column, each coefficient of a binary polynomial having the highest degree k-1 is designated as k bit values constituting the first operation code. After generating the 1 polynomial, generating the second polynomial by designating each coefficient of the binary polynomial having the highest degree k-1 as k bit values constituting the second operation code, the first polynomial and the second polynomial are multiplied together to generate the operation polynomial, which is a binary polynomial whose highest degree is 2k-2, and constructs each coefficient of the operation polynomial into a bit string to generate the seed code of 2k-1 bits. Then, the seed code is applied as an input to the encryption key generation function to generate the first encryption key, and when the first encryption key is generated, the first encryption file is decrypted with the first encryption key, 1 A document management service server characterized in restoring document files. According to claim 2,
When a second document file for a new electronic document created in the second user terminal is received from the second user terminal and a storage request command for the second document file is received, to the second user terminal, the second document file is received. a second location information requesting unit requesting transmission of current location information of a user terminal;
a second IP address checking unit configured to check a second IP address assigned to the second user terminal when third location information is received from the second user terminal;
When the second IP address is identified, a request is made to the IP address location tracking service server to provide location information according to the second IP address, and the location according to the second IP address is requested from the IP address location tracking service server. a second location information checking unit that checks whether a separation distance between the third location information and the fourth location information is within the reference distance when the fourth location information is received as information; and
If it is determined that the separation distance between the third location information and the fourth location information is within the reference distance, the document file storage processing unit for storing the second document file in the document file database in correspondence with the third location information.
A document management service server further comprising a. A method of operating a document management service server for managing document files based on location information,
maintaining a document file database in which a plurality of document files and location information of a point where each of the plurality of document files is created correspond to each other and are stored;
requesting transmission of current location information of the first user terminal to the first user terminal when a location information-based document file search request is received from the first user terminal;
When first location information is received from the first user terminal, among the plurality of document files stored in the document file database, a document file having location information within a preset reference radius from the first location information exists. Searching whether or not; and
Among the plurality of document files stored in the document file database, if it is found that at least one document file exists among the document files having location information within the reference radius from the first location information, the at least one document file is found to exist. After generating a search result list composed of file names of each document file, designating the search result list as a search result for the document file search request and transmitting the search result list to the first user terminal.
A method of operating a document management service server comprising a. According to claim 6,
After the search result list is transmitted to the first user terminal, when a transmission request for a first document file, which is any one of the at least one document file, is received from the first user terminal, the first user terminal Checking the assigned first IP (Internet Protocol) address;
When the first IP address is identified, a request is made to a preset IP address location tracking service server to provide location information according to the first IP address, and from the IP address location tracking service server, location information according to the first IP address is requested. When second location information is received as location information, checking whether a distance between the first location information and the second location information is within a predetermined reference distance; and
extracting the first document file from the document file database and transmitting the same to the first user terminal when it is confirmed that the separation distance between the first location information and the second location information is within the reference distance;
Method of operating a document management service server further comprising a. According to claim 7,
The step of extracting the first document file and transmitting it to the first user terminal
Reference position information table previously shared with the first user terminal - The reference position information table includes a plurality of preset reference position information and a pre-allocated k for each of the plurality of reference position information (k is 2 storing and maintaining a table in which serial numbers of digits are recorded;
Encryption for encrypting and transmitting the first document file after extracting the first document file from the document file database when it is confirmed that the separation distance between the first location information and the second location information is within the reference distance. generating an event;
When the encryption event occurs, first reference position information having a closest distance to the first position information among the plurality of reference position information is checked from the reference position information table, and the first reference position information for the first reference position information is determined. 1 Extracting a serial number, identifying second reference location information that is furthest from the first location information among the plurality of pieces of reference location information, and extracting a second serial number for the second reference location information. ;
When the first serial number and the second serial number are extracted, the result value when a modulo-2 operation is performed on each of the k numbers constituting the first serial number is configured as a bit string. By doing so, a first operation code of k bits is generated, and a resultant value obtained when a modulo-2 operation is performed on each of the k numbers constituting the second serial number is configured as a bit string, thereby forming a second operation code of k bits. generating an opcode;
When the first operation code and the second operation code are generated, the first polynomial is obtained by designating each coefficient of a binary polynomial having the highest order k-1 as k bit values constituting the first operation code. generating a second polynomial by specifying each coefficient of a binary polynomial having a highest degree k-1 as k bit values constituting the second operation code;
When the first polynomial and the second polynomial are generated, the first polynomial and the second polynomial are multiplied to generate an operating polynomial that is a binary polynomial having a highest degree of 2k-2, and then each coefficient of the operating polynomial is generated. generating a 2k-1 bit seed code by constructing a bit string, and then generating a first encryption key by applying the seed code as an input to a preset encryption key generation function; and
When the first encryption key is generated, a first encryption file is generated by encrypting the first document file with the first encryption key, and then the first encryption file and the encryption key generation function are transmitted to the first user terminal. step to do
including,
The first user terminal is
When the standard location information table is stored in a memory and the first encryption file and the encryption key generation function are received from the document management service server, they are stored in the memory based on the first location information The first serial number and the second serial number are extracted from the reference location information table, the seed code is generated based on the first serial number and the second serial number, and the seed code is converted into the encryption key. A method of operating a document management service server, characterized in that the document management service server restores the first document file by generating the first encryption key by applying an input to a generating function and then decrypting the first encryption file with the first encryption key. . According to claim 8,
The first user terminal is
When the first encryption file and the encryption key generating function are received from the document management service server, the first location information among the plurality of pieces of standard location information and the standard location information from the standard location information table stored in the memory. The first reference location information of the closest distance is identified, the first serial number for the first reference location information is extracted, and the first reference location information and the furthest distance from among the plurality of pieces of reference location information are identified. When the second reference location information is checked, the second serial number for the second reference location information is extracted, and then a modulo-2 operation is performed on each of the k numbers constituting the first serial number. The first operation code of k bits is generated by configuring the result value of as a bit string, and the result value when the modulo-2 operation is performed on each of the k numbers constituting the second serial number is bit. After generating the second operation code of k bits by configuring it as a column, each coefficient of a binary polynomial having the highest degree k-1 is designated as k bit values constituting the first operation code. After generating the 1 polynomial, generating the second polynomial by designating each coefficient of the binary polynomial having the highest degree k-1 as k bit values constituting the second operation code, the first polynomial and the second polynomial are multiplied together to generate the operation polynomial, which is a binary polynomial whose highest degree is 2k-2, and constructs each coefficient of the operation polynomial into a bit string to generate the seed code of 2k-1 bits. Then, the seed code is applied as an input to the encryption key generation function to generate the first encryption key, and when the first encryption key is generated, the first encryption file is decrypted with the first encryption key, 1 A method of operating a document management service server characterized by restoring a document file. According to claim 7,
When a second document file for a new electronic document created in the second user terminal is received from the second user terminal and a storage request command for the second document file is received, to the second user terminal, the second document file is received. requesting transmission of current location information of a user terminal;
checking a second IP address assigned to the second user terminal when third location information is received from the second user terminal;
When the second IP address is identified, a request is made to the IP address location tracking service server to provide location information according to the second IP address, and the location according to the second IP address is requested from the IP address location tracking service server. When fourth location information is received as information, checking whether a separation distance between the third location information and the fourth location information is within the reference distance; and
If it is determined that the separation distance between the third location information and the fourth location information is within the reference distance, storing the second document file in the document file database in correspondence with the third location information.
Method of operating a document management service server further comprising a. A computer-readable recording medium recording a computer program for executing the method of any one of claims 6 to 10 through a combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6 to 10 through a combination with a computer.

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