JP2005202474A - File management device, method and program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reasonably and commonly use a file in a plurality of computers. <P>SOLUTION: A user α goes to work at an enterprise, and prepares a file 6 by a personal computer 2a. The file 6 is transmitted through the Internet 4 to a file management server 1 in a background. The user α goes home after finishing his or her labor. When the user tries to operate the file 6 by a personal computer 2b, the personal computer 2b requests the transmission of the file 6 to the file management server 1. The file 6 is transmitted from the file management server 1 to the personal computer 2b. Thus, the personal computer 2b is able to acquire the file 6, and the user α is able to operate the file 6 by the personal computer 2b. Also, when the user α updates the file 6, the updated section is transmitted to the file management server 1 so as to be recorded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to file sharing for personal computers and the like.

  Conventionally, business in a company is often performed by browsing and creating a file with a personal computer. The employee of the company who is the creator of the file creates the file with a personal computer placed in the company. Here, a company employee may go home or go on a business trip outside the company. In addition, company employees often view and create files at home and on business trips to carry out their work.

  If a file is recorded on the file server and the file server can be accessed via a network (see, for example, Patent Document 1), the file server is accessed from a personal computer at home or on a business trip, and the file can be viewed and browsed. Can be created.

JP-A-5-346896 (Summary)

  However, if the file server is accessed for browsing and creating the file, the load on the file server is heavy, and there are problems such as a reduction in processing speed.

  Accordingly, an object of the present invention is to use a file without difficulty in a plurality of computers or the like.

  The invention according to claim 1 is based on the file recording means for recording the file, the transmission request receiving means for receiving the transmission request for the file and the authentication information regarding the transmission requesting terminal that is the transmission source of the transmission request, and the authentication information. An authentication unit that determines whether or not the transmission request is valid, and a file transmission unit that reads and transmits a file from the file recording unit based on the transmission request that is determined to be valid by the authentication unit. .

  According to the invention configured as described above, the file recording unit records a file. The transmission request receiving means receives the authentication information related to the transmission requesting terminal that is the transmission source of the transmission request together with the file transmission request. The authentication unit determines whether the transmission request is valid based on the authentication information. The file transmission means reads and transmits the file from the file recording means based on the transmission request determined to be valid by the authentication means.

  The invention described in claim 2 is the invention described in claim 1, wherein the authentication information is configured to be an address on the network of the transmission requesting terminal.

  The invention described in claim 3 is the invention described in claim 1, wherein the authentication information is configured to be file identification information for identifying a file recorded in the transmission requesting terminal.

  The invention described in claim 4 is the invention described in claim 3, wherein the file identification information is formed by irreversibly converting at least a part of the file.

  The invention described in claim 5 is the invention described in claim 4, wherein the irreversible conversion is configured to be a hash conversion.

  The invention described in claim 6 is the invention described in claim 1, wherein the authentication unit is configured to request another authentication for the transmission request determined to be invalid by the authentication unit.

  The invention described in claim 7 is the invention described in claim 6, wherein the other authentication is authentication based on input of a password.

  The invention according to claim 8 is the invention according to claim 6, wherein another authentication is authentication based on an operation performed by a user based on transmission of an e-mail addressed to the user of the transmission request terminal. Configured to be.

  The invention described in claim 9 is the invention described in claim 1, wherein the file transmission means is configured to place the read file in a state that can be viewed by an unspecified number of persons.

  The invention described in claim 10 is the invention described in claim 1, wherein the file transmission means is configured to place the read file in a state that can be viewed by a specific person other than the creator of the file.

  The invention according to claim 11 is the invention according to claim 10, wherein the read-out file is one in which the creator of the file is operating with the transmission requesting terminal. .

  Invention of Claim 12 is invention of Claim 1, Comprising: The operation file identification information acquisition means which acquires the information for identifying the file in operation from a transmission request terminal, Operation file name acquisition means For the file having the file name acquired by the transmission means, a transmission state determination unit for determining a transmission state by the file transmission unit is provided.

  The invention according to claim 13 is the invention according to claim 12, wherein when the transmission state determining means determines that the transmission by the file transmitting means is not completed, the file transmitting means Transmission of the file having the file name acquired by the name acquisition means is configured to be given priority over transmission of other files.

  The invention according to claim 14 is the invention according to claim 12, wherein when the transmission state determination means determines that the transmission by the file transmission means is not completed, the file transmission means The name acquisition unit is configured not to transmit the file having the file name acquired.

  The invention described in claim 15 is the invention described in claim 1, and is configured to instruct the transmission requesting terminal to delete the file transmitted.

  According to the sixteenth aspect of the present invention, the file recording means records the file and the transmission request receiving means receives the authentication information related to the transmission request terminal that is the transmission request transmission source together with the file transmission request. A transmission request receiving step, an authentication unit for determining whether the transmission request is valid based on the authentication information, and a file transmission unit based on the transmission request that is determined to be valid by the authentication unit. A file transmission step of reading and transmitting the file from the recording means.

  The invention according to claim 17 is based on a file recording process for recording a file, a transmission request reception process for receiving authentication information about a transmission requesting terminal that is a transmission source of the transmission request together with a file transmission request, and the authentication information. Executes authentication processing to determine whether or not the transmission request is valid, and file transmission processing to read and transmit the file from the recorded contents of the file recording processing based on the transmission request determined to be valid by the authentication processing to the computer It is a program to make it.

  The invention described in claim 18 is based on a file recording process for recording a file, a transmission request reception process for receiving authentication information about a transmission requesting terminal that is a transmission source of the transmission request together with a file transmission request, and the authentication information. Executes authentication processing to determine whether or not the transmission request is valid, and file transmission processing to read and transmit the file from the recorded contents of the file recording processing based on the transmission request determined to be valid by the authentication processing to the computer It is a recording medium readable by a computer on which a program for causing the program to be recorded is recorded.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of an information system in which a file management server 1 according to an embodiment of the present invention is used.

  The file management server 1 is connected to personal computers 2a, 2b and 2c via the Internet 4. The personal computer 2a is located at the company to which the user α belongs, the personal computer 2b is located at the home of the user α, and the personal computer 2c is located at the business trip destination of the user α.

  A personal computer 2d is also connected to the Internet 4 and is used by the user β. As will be described later, the file created by the user α is recorded in the file management server 1, and the user β is a person who intends to view the file illegally.

  2 and 3 are diagrams showing basic usage modes of the file management server 1. FIG. First, as shown in FIG. 2A, the user α goes to a company and creates a file 6 by the personal computer 2a. The file 6 is transmitted to the file management server 1 via the Internet 4. The file 6 is preferably transmitted in parallel with the use of the personal computer 2a by the user α. That is, it is preferably performed in the so-called background.

  The user α finishes working at the company and returns home. Then, as shown in FIG. 2B, the personal computer 2b tries to operate (view, create, update, etc.) the file 6. The personal computer (transmission request terminal) 2b requests the file management server 1 to transmit the file 6. The file 6 is transmitted from the file management server 1 to the personal computer 2b. If the old file 6 remains in the personal computer 2b, the difference between the file 6 and the old file 6 may be transmitted. Thus, since the personal computer 2b can acquire the file 6, the user α can operate the file 6 by the personal computer 2b. When the user α updates the file 6, the updated part is transmitted to the file management server 1 and recorded.

  Also, the user α goes from the company to the business trip destination. Then, as shown in FIG. 3A, the personal computer 2c tries to operate (view, create, update, etc.) the file 6. The personal computer (transmission request terminal) 2 c requests the file management server 1 to transmit the file 6. At this time, the file 6 is transmitted from the file management server 1 to the personal computer 2c. Thus, since the personal computer 2c can acquire the file 6, the user α can operate the file 6 by the personal computer 2c. When the user α updates the file 6, the updated part is transmitted to the file management server 1 and recorded.

  Furthermore, the user α returns to the company from the business trip destination. Then, as shown in FIG. 3B, the personal computer 2 c receives a command to delete the file 6 from the file management server 1 and deletes the file 6. It is advantageous to leave the file 6 on a business trip destination because it is not preferable.

  Note that when the user tries to operate (view, create, update, etc.) the file 6 with the personal computer 2a after returning to the office, the personal computer (transmission request terminal) 2a requests the file management server 1 to transmit the file 6. The file 6 is transmitted from the file management server 1 to the personal computer 2a.

  The file 6 includes e-mail and computer setting information (for example, network setting information and background) in addition to the document file.

  As shown in FIG. 4, when an unauthorized user β tries to operate (view, create, update, etc.) the file 6 with the personal computer 2d, the personal computer (transmission request terminal) 2d Request the file management server 1 for transmission. However, the file management server 1 determines that the transmission request is invalid and rejects the request.

First Embodiment FIG. 5 is a block diagram showing a configuration of a file management server 1 according to the first embodiment.

  The file management server 1 includes a file receiving unit 12, a file recording unit 14, a file name recording unit 15, a transmission request receiving unit 16, an authentication information recording unit 18, a password recording unit 19, an authentication unit 20, and a file transmission unit 22.

  The file receiving unit 12 receives the file 6 transmitted from the personal computers 2a, 2b, and 2c via the Internet 4.

  The file recording unit 14 records the file 6 received by the file receiving unit 12 in association with a file name (eg, letter .doc). FIG. 6 shows an example of the recorded content 14 a of the file recording unit 14. Referring to FIG. 6, the contents of the file (Konchi ...) are recorded in association with the file name (letter .doc).

  The file name recording unit 15 records the file name in association with the user ID for identifying the user who created the file. For example, it is recorded that the creator of the file with the file name “letter.doc” is the user α. FIG. 7 shows an example of the recorded content 15 a of the file name recording unit 15. Referring to FIG. 7, a file name (letter .doc) is recorded in association with user ID: A001 (user ID of user α).

  The transmission request receiving unit 16 receives a transmission request for the file 6 from the personal computers (transmission request terminals) 2a, 2b, and 2c. Further, the transmission request receiving unit 16 receives authentication information regarding the personal computers 2a, 2b, and 2c and the user ID of the user from the personal computers (transmission request terminals) 2a, 2b, and 2c.

  The authentication information related to the personal computers 2a, 2b, and 2c is, for example, an address (for example, an IP address) on the network of the personal computers 2a, 2b, and 2c. The authentication information regarding the personal computer 2b is, for example, information obtained by irreversibly converting at least a part of the old file 6 recorded in the personal computer 2b (for example, a hash value of the old file 6). In addition, it is preferable that the hash value of the part (for example, file name etc.) common in the old file 6 and the file 6 is used as authentication information.

  The authentication information recording unit 18 records addresses (for example, IP addresses) on the network of the personal computers 2a, 2b, and 2c that are frequently used by the user in association with the user ID. This is in view of the fact that a user often uses a specific computer (personal computers 2a, 2b, 2c) rather than using an unspecified number of computers.

  FIG. 8A shows an example of the recorded content 18 a of the authentication information recording unit 18. In the authentication information recording unit 18, the personal computer 2 a has an IP address of 135..., And a personal computer 2 b has an IP address of 202... ..., the IP address of the personal computer 2c: 95 ..... is recorded.

  Further, the authentication information recording unit 18 records an irreversible conversion of at least a part of a file created by the user identified by the user ID in association with the user ID.

  FIG. 8B shows another example of the recorded content 18 a of the authentication information recording unit 18. In the authentication information recording unit 18, a hash value (0x6f ... 2) of the file name of the file “letter.doc” created by the user α is recorded in association with the user ID: A001 of the user α. ing.

  The password recording unit 19 records a password that the authentication unit 20 may request from the user in association with the user ID.

  The authentication unit 20 determines whether the transmission request for the file 6 is valid based on the authentication information received by the transmission request reception unit 16. Specifically, (1) the source IP address in the authentication information received by the transmission request receiving unit 16 matches the IP address recorded in the authentication information recording unit 18, and (2) the old file 6 If at least a part of hash values satisfies at least part of the hash value of the file 6 recorded in the authentication information recording unit 18, it is determined that the transmission request of the file 6 is valid. .

  If the authentication unit 20 determines that the transmission request for the file 6 is valid, the authentication unit 20 permits the file transmission unit 22 to transmit the file 6.

  If the authentication unit 20 determines that the transmission request for the file 6 is invalid, the authentication unit 20 requests the user of the computer who has requested the transmission of the file 6 to input a password. The password input is received and compared with the password recorded in the password recording unit 19. If they match, it is determined that the file 6 transmission request is valid, and the file transmission unit 22 is permitted to transmit the file 6. If they do not match, it is determined that the transmission request for the file 6 is invalid.

  Note that the authentication unit 20 is not required to enter a password, but to a user's mobile phone (a terminal capable of receiving mail that can be accessed only by a legitimate user other than the computer that transmitted the transmission request). If there is an action (for example, a reply or the like) that can be taken only by the person who has received such an e-mail, it is determined that the request for sending the file 6 is valid, and the file sending unit 22 Transmission may be permitted. If there is no such operation, it is determined that the transmission request for the file 6 is invalid.

  If there is a transmission permission from the authentication unit 20, the file transmission unit 22 reads the file name associated with the user ID received by the transmission request reception unit 16 from the file name recording unit 15. Then, the file associated with the file name is read from the file recording unit 14 and transmitted to the personal computers (transmission request terminals) 2a, 2b, and 2c.

  Next, the operation of the first embodiment will be described with reference to the flowchart of FIG.

  First, the transmission request receiving unit 16 of the file management server 1 receives the transmission request for the file 6 together with the authentication information and the user ID of the user (S10). The received authentication information and user ID are sent from the transmission request receiving unit 16 to the authenticating unit 20.

  The authentication unit 20 reads authentication information (IP address, hash value of a part of the file) associated with the user ID received from the transmission request receiving unit 16 from the authentication information recording unit 18, and the authentication unit 20 transmits The authentication information received from the request receiving unit 16 is compared with the authentication information read from the authentication information recording unit 18 (S12).

  If the comparison results do not match (S12, No), the authentication unit 20 requests the user of the computer that has requested transmission of the file 6 to input a password (S14). Alternatively, an e-mail may be transmitted to the user's mobile phone.

  And the authentication part 20 receives the input of a password (S16). The authentication unit 20 compares the input password with the password recorded in the password recording unit 19 (S18). If they do not match (S18, No), it is determined that the transmission request for the file 6 is invalid. If there is no reply to the e-mail sent to the user's mobile phone, it may be determined that the transmission request for the file 6 is invalid.

  If the comparison result of the authentication information matches (S12, Yes) or the comparison result of the password matches (S18, Yes), the authentication unit 20 permits file transmission. Thereby, the file transmission part 22 reads the file 6 from the file recording part 14, and transmits to personal computer (transmission request | requirement terminal) 2a, 2b, 2c (S20).

  According to the first embodiment, even if a legitimate user α returns home and uses the personal computer 2b or travels and uses the personal computer 2c, the file 6 is transmitted from the file management server 1. be able to. Therefore, the legitimate user α can operate the file 6 without being at the company.

  In addition, according to the first embodiment, even if an unauthorized user β requests the file management server 1 to transmit the file 6 from the personal computer 2d, the transmission is not performed. That is, the IP address of the personal computer 2d is different from the IP addresses (personal computers 2a, 2b, 2c) recorded in the authentication information recording unit 18. Since the file recorded in the personal computer 2d is different from the file 6 recorded in the personal computers 2a, 2b, and 2c, the hash value of the file recorded in the personal computer 2d is also recorded in the authentication information recording unit 18. It is different from the hash value of the file. Therefore, the authentication unit 20 determines that the request is an unauthorized request. Moreover, it is impossible to respond to a password input request without knowing the valid user α password. Therefore, the file 6 is not transmitted to the unauthorized user β, and the security is high.

Second Embodiment In the second embodiment, the contents recorded in the file name recording unit 15 in the first embodiment are changed, and the file is released, released to a specific person other than the creator, and updated in real time. It makes it possible to show the contents.

  The configuration of the file management server 1 according to the second embodiment is substantially the same as that of the first embodiment and is not shown (see FIG. 5).

  FIG. 10 shows an example of the recorded content 15a of the file name recording unit 15 according to the second embodiment. The user ID and file name are the same as in the first embodiment (see FIG. 7).

  In the vertical column “public”, “◯” means “public”, and “x” means “not public” (this is the same as in the first embodiment). “Publishing” means placing a file in a state that can be viewed by an unspecified number of people. For example, a file can be browsed by a web browser.

“A010 (user β)” in the vertical column “user ID of user who can access” means that access (viewing, etc.) is permitted only for user β in addition to user α. In addition,
“X” means “access only to user α” (this is the same as in the first embodiment).

  In the vertical column “synchronization”, “◯” means “synchronize” and “x” means “not synchronize”. “Synchronize” means that the file creator (user α) transmits the file being operated by the computer 2a or the like. In the example of FIG. 10, it means that the editing content of the file (letter C.doc) by the user α can be seen by the user β in real time.

  If there is a transmission permission from the authentication unit 20, the file transmission unit 22 reads the file name associated with the user ID received by the transmission request reception unit 16 from the file name recording unit 15. At this time, the fields of “public”, “user ID of accessible user”, and “synchronization” are checked, and the corresponding operation is performed. For example, the letter A.doc makes it possible to view a file with a web browser. The letter C.doc is the file being edited (letter C.doc) so that the user β can see the edited contents of the file (letter C.doc) in real time. Send to β personal computer.

  The operation of the second embodiment is the same as the operation of the first embodiment.

  According to the second embodiment, the file can be used not only by the creator but also by others in various formats (publication, etc.).

Third Embodiment In the third embodiment, an operation file name acquisition unit (operation file identification information acquisition unit) 24 and an update state determination unit 26 are provided in the first embodiment.

  FIG. 11 is a block diagram showing the configuration of the file management server 1 according to the third embodiment. The file management server 1 includes a file receiving unit 12, a file recording unit 14, a file name recording unit 15, a transmission request receiving unit 16, an authentication information recording unit 18, a password recording unit 19, an authentication unit 20, a file transmission unit 22, and an operation file. A name acquisition unit (operation file identification information acquisition unit) 24 and an update state determination unit 26 are provided.

  The file receiving unit 12, the file recording unit 14, the file name recording unit 15, the transmission request receiving unit 16, the authentication information recording unit 18, the password recording unit 19, and the authentication unit 20 are the same as those in the first embodiment.

  The operation file name acquisition unit 24 (operation file identification information acquisition means) is the file name of the file being operated by the user from the personal computers (transmission request terminals) 2a, 2b, and 2c (others can be used as long as they can identify the file). You may).

  The update state determination unit 26 receives the file name of the file being operated from the operation file name acquisition unit 24, and inquires of the file transmission unit 22 whether transmission of the file has been completed. Based on the response of the inquiry, it is determined whether or not the file transmission is completed. If the judgment result is “file transmission has not been completed”, the personal computer (transmission request terminal) 2a, 2b, 2c will be asked, “The file being operated is an old file. Do you want to update it?” Send a message to that effect. This is because the transmission has not been completed means that the file management server 1 has not updated the file to the latest one.

  In response to the message, the users of the personal computers (transmission request terminals) 2a, 2b, and 2c instruct “update / do not update” and send them to the update state determination unit 26.

  The file transmission unit 22 responds to the inquiry from the update state determination unit 26. If the update state determination unit 26 is instructed to “update”, the file instructed is transmitted with priority over other files. When an instruction “do not update” is given, the file instructed is not transmitted.

  Next, the operation of the third embodiment will be described.

  The file transmission request is authenticated and the file transmission unit 22 starts the file transmission. Up to this point, the process is the same as in the first embodiment.

  Here, the user (for example, the user α) starts the file operation by the computer (for example, the personal computer 2a). The file name of the file for which the operation has been started is transmitted to the file management server 1.

  The operation file name acquisition unit 24 acquires the file name of the file being operated by the user. Then, the update state determination unit 26 receives the file name and inquires of the file transmission unit 22 whether or not the transmission of the file corresponding to the file name has been completed. Based on the response of the inquiry, it is determined whether or not the file transmission is completed.

  If the result of the determination is that “file transmission has not been completed”, the user α is trying to operate an old file recorded in the personal computer 2a. This is because the update of the old file by the file management server 1 has not yet been completed.

  Therefore, the update state determination unit 26 sends a message to the personal computer 2a indicating that the file being operated is an old file. Do you want to update it?

  In response to this message, the user α of the personal computer 2 a instructs “update / do not update” and sends it to the update state determination unit 26.

  When the update state determination unit 26 is instructed to “update”, the file transmission unit 22 transmits the instructed file with priority over other files. When an instruction “do not update” is given, the file instructed is not transmitted.

  According to the third embodiment, when a user performs an operation on a file that has not yet been updated by the file management server 1, the file management server gives priority to the update (does not update). One operation can be selected.

  Moreover, said embodiment is realizable as follows. A computer media reader having a CPU, hard disk, and media (floppy (registered trademark) disk, CD-ROM, etc.) reader reads the media on which the program for realizing the above parts is recorded, and is installed on the hard disk. To do. The above embodiment can also be realized by such a method.

It is a figure which shows the structure of the information system in which the file management server 1 concerning embodiment of this invention is used.

It is a figure which shows the basic usage condition (use by the user (alpha)) of the file management server 1. FIG.

It is a figure which shows the basic usage condition (use by the user (alpha)) of the file management server 1. FIG.

It is a figure which shows the basic usage condition (use by the unjust user β) of the file management server 1.

It is a block diagram which shows the structure of the file management server 1 concerning 1st embodiment.

It is a figure which shows an example of the recording content 14a of the file recording part 14. FIG.

It is a figure which shows an example of the recording content 15a of the file name recording part 15. FIG.

It is a figure which shows an example of the recording content 18a of the authentication information recording part 18. FIG.

It is a flowchart which shows operation | movement of 1st embodiment.

It is a figure which shows an example of the recording content 15a of the file name recording part 15 concerning 2nd embodiment.

It is a block diagram which shows the structure of the file management server 1 concerning 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 File management server 12 File receiving part 14 File recording part 15 File name recording part 16 Transmission request receiving part 18 Authentication information recording part 19 Password recording part 20 Authentication part 22 File transmission part 24 Operation file name acquisition part (Operation file identification information acquisition) means)
26 Update state determination unit 2a, 2b, 2c, 2d Personal computer 6 File

Claims (18)

A file recording means for recording a file;
A transmission request receiving means for receiving authentication information related to a transmission request terminal that is a transmission source of the transmission request together with the transmission request of the file;
Authentication means for determining whether the transmission request is valid based on the authentication information;
Based on the transmission request determined to be valid by the authentication unit, a file transmission unit that reads and transmits the file from the file recording unit;
A file management device. The file management apparatus according to claim 1,
The authentication information is an address on the network of the transmission request terminal.
File management device. The file management apparatus according to claim 1,
The authentication information is file identification information for identifying the file recorded in the transmission request terminal.
File management device. The file management device according to claim 3,
The file identification information is obtained by irreversibly converting at least a part of the file.
File management device. The file management device according to claim 4,
The irreversible transformation is a hash transformation.
File management device. The file management apparatus according to claim 1,
The authentication means requests another authentication for the transmission request determined to be unfair by the authentication means.
File management device. The file management device according to claim 6,
The another authentication is authentication based on the input of a password.
File management device. The file management device according to claim 6,
The another authentication is authentication based on an operation performed by the user based on transmission of an e-mail addressed to the user of the transmission request terminal.
File management device. The file management apparatus according to claim 1,
The file transmission means places the read file in a state where an unspecified number of people can see it.
File management device. The file management apparatus according to claim 1,
The file transmission means places the read file in a state that can be seen by a specific person other than the creator of the file.
File management device. The file management device according to claim 10,
The file that has been read is being operated by the creator of the file by the transmission request terminal.
File management device. The file management apparatus according to claim 1,
Operation file identification information acquisition means for acquiring information for identifying the file being operated from the transmission request terminal;
For the file with the file name acquired by the operation file name acquisition unit, a transmission state determination unit that determines a transmission state by the file transmission unit;
A file management device. The file management apparatus according to claim 12, wherein
When it is determined by the transmission state determination means that the transmission by the file transmission means has not been completed,
The file transmission means performs transmission of the file having the file name acquired by the operation file name acquisition means in preference to transmission of other files.
File management device. The file management apparatus according to claim 12, wherein
When it is determined by the transmission state determination means that the transmission by the file transmission means has not been completed,
The file transmission means does not transmit the file having the file name acquired by the operation file name acquisition means;
File management device. The file management apparatus according to claim 1,
Instructing the transmission requesting terminal to delete the transmitted file;
Information reading device. A file recording step in which the file recording means records the file;
A transmission request receiving means for receiving, together with the transmission request for the file, authentication information regarding a transmission request terminal that is a transmission source of the transmission request;
An authentication step for determining whether or not the transmission request is valid based on the authentication information; and
A file transmission step for reading and transmitting the file from the file recording unit based on the transmission request determined to be valid by the authentication unit;
File management method. A file recording process for recording files;
A transmission request reception process for receiving authentication information regarding a transmission request terminal that is a transmission source of the transmission request together with the transmission request of the file;
An authentication process for determining whether or not the transmission request is valid based on the authentication information;
Based on the transmission request determined to be valid by the authentication process, a file transmission process for reading and transmitting the file from the recorded content by the file recording process;
A program that causes a computer to execute. A file recording process for recording files;
A transmission request reception process for receiving authentication information regarding a transmission request terminal that is a transmission source of the transmission request together with the transmission request of the file;
An authentication process for determining whether or not the transmission request is valid based on the authentication information;
Based on the transmission request determined to be valid by the authentication process, a file transmission process for reading and transmitting the file from the recorded content by the file recording process;
A computer-readable recording medium on which a program for causing a computer to execute is recorded.

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