JP2021174421A - File management system, file management methods and programs - Google Patents

Abstract

[Problem] To provide a file management system, file management method, and program that can improve the versatility of files that can be handled by a system that determines whether an original file and a separate file different from the original file are the same. [Solution] In the file management system, a file management device 100 includes a receiving means 110 that receives the original file and the separate file, a content information generating means 120 that generates content information indicating the contents of the original file and the separate file, a file management means 130 that associates related information including the content information and history information that is a history of operations performed on the original file with the original file, a determining means 140 that determines whether the content information of the original file and the content information of the separate file are the same, and a providing means 150 that can provide only the original file among the original files to which the related information is associated. [Selected Figure] Figure 2

Description

The present invention relates to a file management system, a file management method, and a program for determining whether or not an original original file and another file different from the original file are the same.

For example, conventionally, as a system for determining whether or not the original original file and another file different from the original file are the same, the hash value of the original electronic file is added to the distribution information file in the portable storage medium. By storing and comparing the hash value of the original electronic file in the distribution information file with the hash value of the (transcript) electronic file stored in the portable storage medium, only in the portable storage medium. Therefore, a method for determining the authenticity of a (transcript) electronic file has been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2006-053836

However, in the above-mentioned conventional system, it is necessary to store the electronic file together with the hash value in the portable storage medium, and there is a problem that the authenticity cannot be determined when only the electronic file is distributed. In addition, a file that associates a hash value with an electronic file requires a dedicated application to read this hash value, and on terminals etc. that do not have this dedicated application installed, the electronic file can be viewed and edited. There is also the problem of not being able to do it.

For this reason, conventionally, a file that can be handled by a system that determines whether the original original file and another file different from the original file are the same must be distributed together with the hash value or a dedicated application is required. There were restrictions such as, and the versatility was low.

The present invention has been made to solve such a problem, and the versatility of a file that can be handled by a system that determines whether or not the original original file and another file different from the original file are the same. It is an object of the present invention to provide a file management system, a file management method and a program capable of improving the above.

The first aspect of the present invention is
A file management system that determines whether the original original file and another file other than the original file are the same.
A reception means for accepting the original file and the other file, and
Content information generation means for generating content information indicating the contents of the original file and the separate file, and
A file management means for associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A determination means for determining whether or not the content information of the original file and the content information of the separate file are the same.
A providing means capable of providing only the original file among the original files to which the related information is associated,
It is characterized by having.

According to this, the content information generation means can generate the content information indicating the contents of the original file and the other file, and can determine whether or not the content information of the determination means original file and the content information of the other file are the same. In addition, the content information is associated with the original file and related information including history information that is the history of operations performed on the original file, while only the original file is provided (for example, downloading by a terminal or (Save, etc.) is possible.

As a result, it is possible to determine whether or not another file is the same as the original file, so that it is possible to prevent the original file from being tampered with and distributed as if it were the same as the original file. Further, for example, it is possible to download and save only the original file to, for example, a terminal while managing the original file created by a general-purpose application in association with the content information and history information of the original file. .. Then, on the terminal, it is possible to view, edit, etc. this file with a general-purpose application.
Therefore, it is possible to improve the versatility of the file that can be handled by the system that determines whether or not the original original file and another file different from the original file are the same.

As a preferred embodiment of the first aspect of the present invention,
The file management means is characterized in that related information including the cumulative history information is associated with the original file at a predetermined timing.

According to this, it is possible to associate related information including cumulative history information with the original file, and manage from the history information for the original file to what kind of operation (for example, who's operation) was performed. It becomes possible. Therefore, for example, when another file and the original file are the same, but the other file is obtained from a place where it should not exist (for example, even though the original file is prohibited from being taken out of the company, it is different. When the file is obtained from outside the company), it is possible to identify the outflow route from the history information.
Therefore, it is possible to prevent the leakage of the original file while improving the versatility of the file that can be handled by the system that determines whether the original original file and another file different from the original file are the same. ..

As another preferred embodiment of the first aspect of the present invention,
The file management means is
It is possible to associate the related information including a predetermined number of the history information with the original file.
With the new history information, another related information that rewrites the oldest history information is generated.
The original file is associated with the other related information together with the related information before being rewritten.

According to this, in addition to the related information including a predetermined number of history information, it is possible to associate the original file with another related information obtained by rewriting the oldest history information with the newly generated history information.

As a result, when the history information is falsified for the purpose of fraud, it is necessary to falsify another related information in addition to the related information, which makes falsification difficult.
Therefore, it is possible to improve the versatility of the file that can be handled by the system that determines whether the original original file and another file different from the original file are the same, and to prevent the leakage of the original file more reliably. It will be possible.

The second aspect of the present invention is
This is a method executed by a file management system that determines whether or not the original original file and another file other than the original file are the same.
The step of accepting the original file and the other file, and
A step of generating content information indicating the contents of the original file and the other file, and
A step of associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A step of determining whether or not the content information of the original file and the content information of the separate file are the same,
A step in which the related information is associated and only the original file can be provided among the original files,
It is a file management method characterized by including.

The third aspect of the present invention is
A file management system that determines whether the original original file and another file other than the original file are the same.
Reception means for accepting the original file and the other file,
Content information generation means for generating content information indicating the contents of the original file and the separate file,
A file management means for associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A determination means for determining whether or not the content information of the original file and the content information of the separate file are the same.
Providing means capable of providing only the original file among the original files to which the related information is associated.
It is a program characterized by functioning as.

According to the second aspect and the third aspect, the same operation and effect as the file management system related to the first aspect can be obtained.

According to the present invention, it is possible to improve the versatility of a file that can be handled by a system that determines whether or not the original original file and another file different from the original file are the same.

It is a block diagram which shows the hardware configuration of the computer which comprises the file management system which concerns on embodiment of this invention. It is a block diagram which shows the functional structure of the file management system which concerns on embodiment of this invention. It is a figure explaining the outline of the function which accepts the original file, and can provide this original file among the functions of the file management system which concerns on embodiment of this invention. It is a figure explaining the outline of the function of determining whether or not the original file and another file are the same among the functions of the file management system which concerns on embodiment of this invention. It is a figure which shows typically the related information applied to the file management system which concerns on embodiment of this invention. It is a figure explaining the function of the content information generation means and the file management means in the file management system which concerns on embodiment of this invention. It is a flowchart which shows the file reception provision processing executed by the CPU of the file management system which concerns on embodiment of this invention. It is a flowchart which shows the identity determination process executed by the CPU of the file management system which concerns on embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings.

[Hardware configuration of file management system]
First, the hardware configuration of the computer constituting the file management system (hereinafter, simply referred to as “system” or “this system”) according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a hardware configuration of computers constituting the system. The system according to the present embodiment determines whether or not the original original file and another file different from the original file are the same, and is realized by a general computer. The computer includes a CPU (Central Processing Unit) 1, a ROM (Read Only Memory) 2, a RAM (Random Access Memory) 3, a storage device 4, an input / output interface (hereinafter abbreviated as "IF") 5, a mouse 6, and a keyboard. 7. It basically includes a display device 8, a printing device 9, and a communication device 10. The CPU 1, ROM 2, RAM 3, storage device 4, and IF 5 are connected to each other via an internal bus. The mouse 6, keyboard 7, display device 8, printing device 9, and communication device 10 are connected to the internal bus via IF5.

The CPU 1 executes and controls the operation of the entire computer. For example, the CPU 1 executes a file management process described later based on a program. The ROM 2 stores a control program for executing and controlling the operation of the entire computer. The RAM 3 provides a work area required for execution control of the CPU 1, a storage area for various data, and the like. The storage device 4 is a large-capacity storage device such as a hard disk drive or a solid state drive, and stores, for example, a program or data for executing a file management process according to installation or download. The IF 5 exchanges various signals between the mouse 6, the keyboard 7, the display device 8, the printing device 9, and the communication device 10 and the CPU 1.

The mouse 6 is a so-called pointing device, and is used for performing a selection operation or the like on the screen of the display device 8. The keyboard 7 is used to directly input characters, numbers, and the like on the screen of the display device 8. The display device 8 is, for example, a liquid crystal display, and displays character information or the like on an input operation display screen, an output result display screen, or the like. The printing device 9 is, for example, an inkjet printer or a laser printer, and prints, for example, a figure displayed on an output result display screen on paper and outputs it according to a printing operation. The communication device 10 is connected to, for example, a terminal or device on the Internet via a network line (not shown), and downloads or uploads various data or programs to or from the terminal or the like in response to a web request. ..

The computer of the present embodiment has programs, data, and the like for executing file management processing installed in the storage device 4 in advance, but since it is basically connected to the Internet, it can be accessed from another external server. It may be possible to operate by downloading a program or data for executing a file management process each time.

[System function configuration]
Next, the functional configuration of the system will be described with reference to FIGS. 2 to 4. FIG. 2 is a block diagram showing a functional configuration of this system. 3 and 4 are diagrams illustrating an outline of the functions of the system of the present embodiment.

First, an outline of the functions of the system of the present embodiment will be described with reference to FIGS. 3 and 4. This system determines whether or not the original original file and another file different from the original file are the same, and as an example of the computer shown in FIG. 1, the file management device 100 and the file management device 100 are networked. It includes a terminal 300 connected via (for example, the Internet, an in-house LAN, etc.).

FIG. 3 is a diagram illustrating an outline of a function that accepts an original file and makes it possible to provide the original file among the functions of the system of the present embodiment. FIG. 4 is a diagram illustrating an outline of a function of determining whether or not the original file and another file are the same among the functions of the system of the present embodiment.

In the present embodiment, the original file and another file are general files that can be created, edited, viewed, saved, etc. by an application installed on a general computer (personal computer, smartphone, tablet, etc.). .. The original file is a file received from the creator (former file creator) who created this file. Further, in the present embodiment, as shown in FIG. 3, the original file provided to the user who desires to use the original file is also referred to as a user original file in particular. In addition, another file (see FIG. 4) is a file (for example, FIG. 3) received from a former file creator or another person (in the example shown in FIG. 4, an auditor, etc.) at a timing different from that of the original file. It is the user's original file shown in. That is, after the original file is once provided to the user by the file management device 100 (user original file), the content may have been tampered with, and in determining the identity with the original file, the original file may have been tampered with. It will be a separate file.

Further, in the present embodiment, the acceptance means that the file is stored in the file management device 100 by a file operation such as uploading from the terminal 300 via the Internet or saving via the in-house LAN. Further, in the present embodiment, the provision means that the file is stored in the terminal 300 from the file management device 100 by a file operation such as uploading via the Internet or saving via the in-house LAN.

As shown in FIG. 3, in the system of the present embodiment, the file management device 100 receives the original file from the terminal 300 operated by the original file creator, and the content information (for example, hash) indicating the content of the original file is received. Value) is generated. Then, the file management device 100 includes the file information for identifying the original file, the generated content information, and the history information which is the history of the operations performed on the original file in the original file. Associate relevant information.

Further, the file management device 100 provides only the original file among the original files to which the related information is associated, based on the operation of the terminal 300 by the user who desires to use the original file. In the description of the present embodiment, the original file provided by the file management device 100 and stored in the terminal 300 is a user original file, which is a separate file from the original file. Further, the file management device 100 includes the provision of such an original file in the related information as history information.

As shown in FIG. 4, in the system of the present embodiment, in the file management device 100, whether or not the content information of the original file and the content information of another file (for example, the user original file shown in FIG. 3) are the same. To judge. For example, an auditor who wants to confirm whether another file (user original file) is the same as the original file transmits another file (user original file) from the terminal 300 to the file management device 100. The file management device 100 receives the other file and generates the content information of the other file (for example, the hash value generated by the hash function that generated the hash value of the original file).

Then, the file management device 100 determines whether or not the content information of the original file and the content information of another file are the same. The file management device 100 provides the determination result as an audit result to the terminal 300 operated by the auditor.

According to the system of this embodiment, it can be determined whether or not another file is the same as the original file, so that the original file is tampered with and distributed as if it is the same as the original file. Can be prevented. Further, it is possible to download and save only the original file to the terminal 300 while managing the original file created by the general-purpose application in association with the content information and the history information of the original file. Then, on the terminal, it is possible to view, edit, etc. this file with a general-purpose application.
Therefore, it is possible to improve the versatility of the file that can be handled by the system that determines whether or not the original original file and another file different from the original file are the same.

Next, the details of the functional configuration of the system of the present embodiment will be described with reference to FIG.
This system includes a file management device 100 and a plurality of storage means 200 and terminals 300 connected to the file management device 100 via a network (for example, the Internet, an in-house LAN, etc.) as functions realized by a computer. Be prepared. The plurality of storage means 200 may be a plurality of storage areas in the storage device 4 included in the file management device 100.

The file management device 100 includes a reception means 110, a content information generation means 120, a file management means 130, a determination means 140, and a provision means 150.

The receiving means 110 receives the original file and another file from the terminal 300 and stores them in the storage device 4 or the RAM 3 which is an example of the storage means. Further, the receiving means 110 stores the received file information of the original file and another file and the history information in the storage device 4 or the RAM 3 which is an example of the storage means.

FIG. 5 is a diagram schematically showing related information applied to the file management system according to the present embodiment. In the example shown in FIG. 5, only the data names included in the related information are shown, and specific numerical values and the like are omitted. The related information is associated with the original file by the file management means 130 described later.

Related information includes file information and history information. The file information is information about the original file, and is used in the file identification information (file name, file ID, etc.), the creator identification information (user name, user ID, etc.) that identifies the creator of the original file, and the content information generation means 120. Includes generated content information and the like. The history information is a history of operations performed on the original file, and includes the reception date and time (upload date and time, save date and time, etc.), provision date and time (download date and time, access date and time of the original file, etc.) of the original file, and the original file. Includes user identification information that identifies the user who downloaded the file. In the history information, the operations performed on the original file are cumulatively stored by the receiving means 110 and the providing means 150 described later.

The content information generation means 120 generates content information indicating the contents of the original file and another file, and stores the content information in the storage device 4 or the RAM 3. Further, the content information generating means 120 generates history content information indicating a plurality of history information cumulatively stored by the receiving means 110 and the providing means 150, and stores the history content information in the storage device 4 or the RAM 3. The content information generation means 120 generates, for example, the contents of the original file (for example, text data) received by the reception means 110 or the hash value of another file (for example, text data) by a known hash function. It is stored in the storage device 4 or the RAM 3. Further, the content information generating means 120 generates history content information which is a hash value of a plurality of history information cumulatively stored by the receiving means 110 and the providing means 150, and stores the history content information in the storage device 4 or the RAM 3. The content information generation means 120 may generate content information with any kind of data limited to a hash value as long as it is information indicating the contents of the original file and another file. Further, the content information generation means 120 may generate the history content information with any kind of data limited to the hash value as long as the information indicates a plurality of cumulatively stored history information.

The file management means 130 adds the content information of the original file generated by the content information generation means 120 and the history information which is the history of the operations performed on the original file to the original file received by the reception means 110. The related information to be included is associated and stored in the storage means 200. Specifically, the file management means 130 includes, in the original file, the content information of the original file generated by the content information generation unit 120 and the history content information which is a hash value of the cumulatively stored history information. The information is associated and stored in the storage means 200.

Further, the file management means 130 can associate a predetermined number of related information including the history information with the original file, and can associate the related information with the original file at a predetermined timing (for example, every minute, every 24 hours, etc.). Or, at the timing when a predetermined number (for example, three) of new history information is stored, another related information is generated by rewriting the oldest history information with the new history information, and before rewriting to the original file. Along with related information, other related information is also associated.

FIG. 6 is a diagram illustrating the functions of the content information generation means and the file management means in the system of the present embodiment. The content information generation means 120 generates history content information which is a hash value of three history information stored in time series. Specifically, in the example shown in FIG. 6, the content information generating means 120 has the history content information X which is the hash value of the history information A, B, and C at the timing of the “related information X-1” in the upper row. -1 is generated, and if it is the timing of "related information X" in the middle row, history content information X which is a hash value of history information D, E, F is generated, and it is the timing of "related information X + 1" in the lower row. For example, history content information X + 1, which is a hash value of history information G, H, and I, is generated.

The file management means 130 generates related information including history content information at a predetermined timing. Further, the file management means 130 generates another related information in which the oldest history information is rewritten with new history information at a predetermined timing. Specifically, in the example shown in FIG. 6, the file management means 130 includes related information X-1 including history content information X-1 indicating history information A, B, and C in the upper "related information X-1". Generate 1. Further, the file management means 130 includes related information X including history content information X indicating history information D, E, and F in the middle "related information X" which is the timing next to the upper "related information X-1". To generate. Further, the file management means 130 generates related information X including history content information X + 1 indicating history information G, H, I in the lower "related information X + 1" which is the timing next to the middle "related information X". do.

Specifically, the file management means 130 includes, for example, in the "related information X" in the middle stage, the file information, the history content information X-1 generated at the previous timing, and the history content generated at this timing. Generate related information X including information X. Then, for example, in the lower "related information X + 1" which is the timing next to the middle "related information X", the file management means 130 is the history content information X + 1 which is the new history information, and the "related information X" "Related information X + 1", which is another related information obtained by rewriting the history content information X-1, which is the oldest history information, is generated. In this way, the file management means 130 increases the related information at predetermined timing intervals, and associates the increased related information with the original file.

In this way, according to this system, the history is inherited by the subsequent related information. Therefore, for example, when attempting to falsify the fraudulent history in which the original file was illegally acquired, the fraudulent history becomes a plurality of related information thereafter. Since it is included in, in order to falsify this fraud history, it is necessary to continue falsifying a plurality of related information thereafter, so it is necessary to invest a large amount of calculation resources. Therefore, falsification of fraudulent history becomes extremely difficult.

Further, the file management means 130 may share a plurality of related information generated at a predetermined timing with the plurality of storage means 200.

Returning to FIG. 2, the determination means 140 determines whether or not the content information of the original file and the content information of another file are the same. Specifically, the determination means 140 searches the storage means 200 for data having related information such as a file name of another file received by the reception means 110 from the terminal 300 operated by the auditor. , It is determined whether or not the content information of the original data of the data whose file identification information matches and the content information of the other file generated by the content information generation means 120 are the same.

Further, when the file management means 130 shares a plurality of related information with the plurality of storage means 200, the determination means 140 stores the related information of the data in which the file identification information of another file matches with the plurality of storage means 200. Each of the 200 may be extracted and the extracted related information may be compared with each other. If normal, the related information extracted from each of the plurality of storage means 200 is the same. However, for example, when the related information (particularly, the history content information) stored in any of the storage means 200 has been tampered with, they are not all the same. In this case, the determination means 140 determines that, of the plurality of related information extracted from the plurality of storage means 200, more than half of the same related information is the regular related information. Further, in this case, the determination means 140 may compare related information different from each other and specify the history information related to falsification from the difference.

As described above, according to this system, by sharing a plurality of related information among a plurality of storage means 200, in order to make the falsified related information normal, the data stored in more than half of the storage means 200 is stored. It is necessary to invest a large amount of computing resources because it is necessary to tamper with. Therefore, falsification of fraudulent history becomes extremely difficult.

The providing means 150 can provide only the original file among the original files to which the related information is associated. Specifically, the providing means 150 is the original file to which the related information is associated by the file management means 130 based on the operation of the terminal 300 by the user who desires to use the predetermined original file. Is provided to the user's terminal 300.

Further, when the determining means 140 determines whether the content information of another file received by the receiving means 110 from the terminal 300 operated by the auditor matches the content information of the original data, the providing means 150 determines. , Data indicating the determination result may be provided to the auditor's terminal 300. Further, the providing means 150 may provide the history information related to the falsification specified by the determining means 140 to the terminal 300 of the auditor.

Next, the file management process executed by the CPU 1 of this system will be described. The file management process includes at least the file reception provision process shown in FIG. 7 and the identity determination process shown in FIG.

First, the file reception provision process executed by the CPU 1 of this system will be described with reference to FIG. 7. FIG. 7 is a flowchart showing the file reception provision process.

In step S1, the CPU 1 receives the original file from, for example, the terminal 300 operated by the original file creator, and stores the original file in the storage device 4 or the RAM 3.

In step S2, the CPU 1 generates the content information of the original file received in step S1 and stores it in the storage device 4 or the RAM 3.

In step S3, the CPU 1 includes related information including the content information of the original file generated in step S2 and the history information which is the history of the operations performed on the original file in the original file received in step S1. Are associated with each other and stored in the storage means 200.

In step S4, the CPU 1 selects only the original file among the original files to which the related information is associated in step S3 based on the operation of the terminal 300 by the user who wants to use the original file received in step S1. , Provided to the user's terminal 300. Further, in this step, the CPU 1 rewrites the oldest history information with the history information which is the history of the operations performed on the original file in the plurality of history information of the related information already generated in this step. Another related information is generated, and this other related information is also stored in the storage means 200 in association with the original file.

Next, the identity determination process executed by the CPU 1 of the present system will be described with reference to FIG. FIG. 8 is a flowchart showing the identity determination process.

In step S11, the CPU 1 receives, for example, another file from the terminal 300 operated by the auditor who wants to confirm whether the other file is the same as the original file, and stores the other file in the storage device 4 or the RAM 3.

In step S12, the CPU 1 generates the content information of another file received in step S11 and stores it in the storage device 4 or the RAM 3.

In step S13, the CPU 1 searches the storage means 200 for data having related information that matches the file identification information such as the file name of another file received in step S11, and searches for the original data of the data that matches the file identification information. It is determined whether or not the content information and the content information of another file generated in step S12 are the same.

In step S14, the CPU 1 provides the auditor's terminal 300 with data indicating the determination result of step S13.

With this system, it is possible to determine whether another file is the same as the original file, so it is possible to prevent the original file from being tampered with and distributed as if it were the same as the original file. can. Further, for example, it is possible to download and save only the original file to, for example, the terminal 300 while managing the original file created by a general-purpose application in association with the content information and history information of the original file. Become. Then, on the terminal 300, this file can be viewed, edited, and the like with a general-purpose application.
Therefore, it is possible to improve the versatility of the file that can be handled by the system that determines whether or not the original original file and another file different from the original file are the same.

In addition, according to this system, it is possible to associate related information including cumulative history information with the original file, and what kind of operation (for example, who's operation) was performed from the history information for the original file. Can be managed up to. Therefore, for example, when another file and the original file are the same, but the other file is obtained from a place where it should not exist (for example, even though the original file is prohibited from being taken out of the company, it is different. When the file is obtained from outside the company), it is possible to identify the outflow route from the history information.
Therefore, it is possible to prevent the leakage of the original file while improving the versatility of the file that can be handled by the system that determines whether the original original file and another file different from the original file are the same. ..

Further, according to this system, when the history information is falsified for the purpose of fraud, it is necessary to falsify another related information in addition to the related information, which makes falsification difficult.
Therefore, it is possible to improve the versatility of the file that can be handled by the system that determines whether the original original file and another file different from the original file are the same, and to prevent the leakage of the original file more reliably. It will be possible.

Although the embodiments of the present invention have been described above, it goes without saying that the technical scope of the present invention is not limited to the contents of the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. Further, it is clear from the description of the scope of claims that the form to which such a modification or improvement is added is also included in the technical scope of the present invention.

1 CPU
2 ROM
3 RAM
4 Storage device 6 Mouse 7 Keyboard 8 Display device 9 Printing device 10 Communication device 100 File management device 110 Reception means 120 Content information generation means 130 File management means 140 Judgment means 150 Providing means 200 Storage means 300 Terminal

Claims (5)

A file management system that determines whether the original original file and another file other than the original file are the same.
A reception means for accepting the original file and the other file, and
Content information generation means for generating content information indicating the contents of the original file and the separate file, and
A file management means for associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A determination means for determining whether or not the content information of the original file and the content information of the separate file are the same.
A providing means capable of providing only the original file among the original files to which the related information is associated,
A file management system characterized by being equipped with. The file management system according to claim 1, wherein the file management means associates the related information including the cumulative history information with the original file. The file management means is
It is possible to associate the related information including a predetermined number of the history information with the original file.
With the new history information, another related information that rewrites the oldest history information is generated.
The file management system according to claim 1 or 2, wherein the original file is associated with the other related information together with the related information before being rewritten. This is a method executed by a file management system that determines whether or not the original original file and another file other than the original file are the same.
The step of accepting the original file and the other file, and
A step of generating content information indicating the contents of the original file and the other file, and
A step of associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A step of determining whether or not the content information of the original file and the content information of the separate file are the same,
A step in which the related information is associated and only the original file can be provided among the original files,
A file management method characterized by including. A file management system that determines whether the original original file and another file other than the original file are the same.
Reception means for accepting the original file and the other file,
Content information generation means for generating content information indicating the contents of the original file and the separate file,
A file management means for associating the original file with related information including the content information and history information which is a history of operations performed on the original file.
A determination means for determining whether or not the content information of the original file and the content information of the separate file are the same.
Providing means capable of providing only the original file among the original files to which the related information is associated.
A program characterized by functioning as.

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