Receiving-side management device, receiving-side management method, and receiving-side management program

Abstract

To make it possible to reduce the number of files flowing through a network such as the Internet when the same file is transmitted to a plurality of destinations.SOLUTION: A receiving-side management device 20 receives a file for which a transmission method indicating either individual transmission or batch transmission is specified from an external network 90. When individual transmission is specified as the transmission method, the receiving-side management device 20 uses an internal network 92 to make the file accessible only to a destination receiving terminal 40 among a plurality of receiving terminals 40. When batch transmission is specified as the transmission method, the receiving-side management device 20 uses the internal network 92 to make the file accessible to each of the plurality of receiving terminals 40.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to file transmission technology. [Background technology]

[0002] It is common to send files to other devices via the Internet. For example, an update file for updating a system is sent to a computer that constitutes the system. Here, a file means a collection of data. Therefore, a file can be read as data.

[0003] Patent Document 1 describes the transmission of an attachment. Specifically, Patent Document 1 describes that when an attachment is included in a message to be sent, the attachment is sent after having an approver approve it. Patent Document 1 also describes that whether or not to have an approver approve the attachment is determined according to the confidentiality level of the destination. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2020-030545 Summary of the Invention [Problem to be solved by the invention]

[0005] In existing file transmission systems, when sending the same file to multiple destinations, the same file will be sent over the Internet for each destination. Therefore, as the number of destinations increases, the risk of eavesdropping increases accordingly. An object of the present disclosure is to make it possible to reduce the number of files flowing through a network such as the Internet when sending the same file to multiple destinations. [Means for solving the problem]

[0006] A receiving-side management device according to the present disclosure includes: a receiving-side management device connected to a plurality of receiving terminals via an internal network, a receiving unit that receives a file designated with a transmission method indicating either individual transmission or batch transmission from an external network; a distribution unit that distributes the file by making the file received by the receiving unit via the internal network accessible only to a destination receiving terminal among the plurality of receiving terminals when the individual transmission is specified as the transmission method, and by making the file received by the receiving unit via the internal network accessible to each of the plurality of receiving terminals when the batch transmission is specified as the transmission method; Equipped with. Effect of the Invention

[0007] In the present disclosure, the receiving management device delivers a file received from an external network such as the Internet to a destination via an internal network. In this case, in the case of individual transmission, the receiving management device allows access only to the destination receiving terminal. On the other hand, in the case of bulk transmission, the receiving management device allows access by multiple receiving terminals. This makes it possible to deliver a file to multiple receiving terminals connected to the receiving management device by transmitting only one file to the receiving management device via the external network. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a configuration diagram of a file transmission system 100 according to a first embodiment. [Diagram 2] FIG. 2 is a configuration diagram of a receiving-side management device 20 according to the first embodiment. [Diagram 3] 5 is a flowchart showing the operation of the reception-side management device 20 according to the first embodiment. [Figure 4] FIG. 2 is an explanatory diagram of file management information 231 according to the first embodiment. [Diagram 5]FIG. 11 is a configuration diagram of a receiving-side management device 20 according to a second embodiment. [Figure 6] 10 is a flowchart showing the operation of the reception side management apparatus 20 according to the second embodiment. [Figure 7] FIG. 11 is an explanatory diagram of file management information 231 according to the second embodiment. [Figure 8] 11 is a flowchart showing the operation of the reception side management apparatus 20 according to the third embodiment. [Figure 9] FIG. 11 is an explanatory diagram of the processing of the transmission side management device 10 according to the third embodiment. [Figure 10] FIG. 13 is a configuration diagram of a receiving-side management device 20 according to a first modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Embodiment 1 ***Configuration Description*** The configuration of a file transmission system 100 according to the first embodiment will be described with reference to FIG. The file transmission system 100 includes a transmission-side management device 10 and a reception-side management device 20. The transmission-side management device 10 and the reception-side management device 20 are connected via an external network 90. ​​A specific example of the external network 90 is the Internet. A plurality of sending terminals 30 are connected to the sending side management device 10 via an internal network 91. A plurality of receiving terminals 40 are connected to the receiving side management device 20 via an internal network 92. As a specific example, the internal network 91 and the internal network 92 are LANs. LAN is an abbreviation for Local Area Network.

[0010] The transmitting side management device 10 and the receiving side management device 20 are computers such as servers. Each transmitting terminal 30 and each receiving terminal 40 are computers or the like that constitute a system.

[0011] The configuration of the reception-side management device 20 according to the first embodiment will be described with reference to FIG. The receiving side management device 20 is a computer. The reception-side management device 20 includes the following hardware components: a processor 21, a memory 22, a storage 23, and a communication interface 24. The processor 21 is connected to other hardware components via signal lines and controls these other hardware components.

[0012] The processor 21 is an IC that performs processing. IC is an abbreviation for Integrated Circuit. Specific examples of the processor 21 include a CPU, a DSP, and a GPU. CPU is an abbreviation for Central Processing Unit. DSP is an abbreviation for Digital Signal Processor. GPU is an abbreviation for Graphics Processing Unit.

[0013] The memory 22 is a storage device that temporarily stores data. Specific examples of the memory 22 include SRAM and DRAM. SRAM is an abbreviation for Static Random Access Memory. DRAM is an abbreviation for Dynamic Random Access Memory.

[0014] The storage 23 is a storage device that stores data. A specific example of the storage 23 is an HDD. HDD is an abbreviation for Hard Disk Drive. The storage 23 may also be a portable recording medium such as an SD (registered trademark) memory card, CompactFlash (registered trademark), NAND flash, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD. SD is an abbreviation for Secure Digital. DVD is an abbreviation for Digital Versatile Disk.

[0015] The communication interface 24 is an interface for communicating with an external device. Specific examples of the communication interface 24 include Ethernet (registered trademark), USB, and HDMI (registered trademark) ports. USB is an abbreviation for Universal Serial Bus. HDMI is an abbreviation for High-Definition Multimedia Interface.

[0016] The reception-side management device 20 includes, as functional components, a reception unit 211, a delivery unit 212, and a status update unit 213. The functions of the functional components of the reception-side management device 20 are realized by software. The storage 13 stores a program that realizes the function of each functional component of the reception-side management device 20. This program is loaded into the memory 12 by the processor 11 and executed by the processor 11. In this way, the function of each functional component of the reception-side management device 20 is realized.

[0017] Furthermore, the storage 23 stores file management information 231. The file management information 231 may be stored in an external storage device of the receiving-side management device 20, instead of in the storage 23. Here, the file management information 231 is set to be accessible from the transmitting-side management device 10 and each transmitting terminal 30.

[0018] 2 shows only one processor 21. However, there may be a plurality of processors 21, and the plurality of processors 21 may cooperate to execute programs that realize the respective functions.

[0019] ***Explanation of Operation*** The operation of the reception-side management device 20 according to the first embodiment will be described with reference to FIGS. The operation procedure of the reception-side management device 20 according to the first embodiment corresponds to the reception-side management method according to the first embodiment. Moreover, the program that realizes the operation of the reception-side management device 20 according to the first embodiment corresponds to the reception-side management program according to the first embodiment.

[0020] (Step S11 in FIG. 3: Reception process) The receiving unit 211 receives a file from the external network 90 .

[0021] Here, as a premise for the processing in FIG. 3, any of the sending terminals 30 sends a file via the sending-side management device 10. At this time, the sending terminal 30 sends the file after specifying a sending method indicating either individual sending or batch sending. In the case of individual sending, the sending terminal 30 also specifies the destination receiving terminal 40. Multiple receiving terminals 40 may be specified as the destination receiving terminal 40. Individual sending is a sending method for sending a file only to the destination receiving terminal 40. Batch sending is a sending method for sending a file to all receiving terminals 40 connected to the receiving-side management device 20. The receiving unit 211 receives a file transmitted via the transmission side management device 10 from the external network 90. ​​In other words, the receiving unit 211 receives a file from the external network 90 for which a transmission method indicating either individual transmission or batch transmission is specified.

[0022] When the file is received by the receiving unit 211 in step S11, like the file with the file ID 001 in Fig. 4, the status update unit 213 writes the reception status of the file as "received" in the file management information 231. This enables the transmitting side management device 10 and the transmitting terminal 30, which are the transmission sources, to confirm that the file has been received by the receiving side management device 20.

[0023] (Step S12 in FIG. 3: Method determination process) The delivery unit 212 determines whether the transmission method specified for the file received in step S11 is individual transmission or batch transmission. If individual transmission is selected, the distribution unit 212 advances the process to step S13. On the other hand, if batch transmission is selected, the distribution unit 212 advances the process to step S14.

[0024] (Step S13 in FIG. 3: Individual transmission process) The delivery unit 212 makes the file received in step S11 accessible only to the destination receiving terminal 40 among the multiple receiving terminals 40, using the internal network 92. In the first embodiment, the delivery unit 212 transmits the file to the destination receiving terminal 40 via the internal network 92. Note that, when multiple receiving terminals 40 are specified as destinations, the delivery unit 212 transmits the file to each receiving terminal 40 specified as a destination. As a result, the delivery unit 212 delivers the file to the destination receiving terminal 40.

[0025] (Step S14 in FIG. 3: Bulk transmission process) The distribution unit 212 makes the file received in step S11 accessible to each of the multiple receiving terminals 40 using the internal network 92. In the first embodiment, the distribution unit 212 stores the file in a file storage area set to be accessible by the multiple receiving terminals 40 via the internal network. The file storage area may be provided in the storage 23, or may be provided in a storage device connected by the internal network 92 separately from the reception-side management device 20. The distribution unit 212 notifies each receiving terminal 40 that the file has been stored in the file storage area, together with the file ID. As a result, the distribution unit 212 distributes the file to all of the receiving terminals 40.

[0026] The distribution unit 212 may set a storage limit for storing the file in the file storage area and store the file. The distribution unit 212 may delete the file when the storage limit has passed.

[0027] When the file is delivered by the delivery unit 212 in step S13 or step S14, the status update unit 213 updates the reception status of the file in the file management information 231 to "delivered", as in the case of the files with file IDs 002 and 003 in Fig. 4. This enables the sending side management device 10 and the sending terminal 30 to confirm that the file delivery has been completed. As a specific method, the processor 21 of the receiving side management device 20 transmits information of the record identified by the corresponding file ID in the file management information 231 to the transmitting side management device 10 and the transmitting terminal 30 via the communication interface 24, thereby enabling the transmitting side management device 10 and the transmitting terminal 30 to confirm that distribution has been completed.

[0028] The transmission method may be determined according to the contents of the file. When the transmission method is determined according to the contents of the file, the delivery unit 212 can determine whether the transmission method is individual transmission or batch transmission according to the contents of the file and perform the delivery. Specifically, when the file name includes a character string that does not specify the target person, such as "Everyone," such as "Invitation (for everyone)."pdf," the files can be sent in bulk to the receiving terminal 40. When the file name includes a character string that specifies the receiving terminal 40, such as "Message (for A)."pdf," the files can be sent individually to the receiving terminal 40 that is specified by the target person, A.

[0029] ***Advantages of the First Embodiment*** As described above, the receiving-side management device 20 according to the first embodiment delivers a file received from the external network 90 to the destination via the internal network 92. At this time, in the case of individual transmission, the receiving-side management device 20 allows access only to the destination receiving terminal 40. On the other hand, in the case of batch transmission, the receiving-side management device 20 allows access by multiple receiving terminals 40. As a result, if only one file is transmitted to the receiving-side management device 20 via the external network 90, it becomes possible for the file to be delivered to multiple receiving terminals 40 connected to the receiving-side management device 20. As a result, even if the number of destinations increases, the possibility of eavesdropping or the like does not increase.

[0030] For example, suppose that each receiving terminal 40 is a computer that constitutes a system. In this case, when performing an update that is commonly applied to all receiving terminals 40, the transmitting terminal 30 transmits the update file using the transmission method of batch transmission. On the other hand, when performing an update that is only applied to some receiving terminals 40, the transmitting terminal 30 transmits the update file using the transmission method of individual transmission. In either case, only one update file flows through the external network 90.

[0031] Embodiment 2 The second embodiment differs from the first embodiment in that the file must be approved before delivery and that confidential transmission can be selected as the transmission method. In the second embodiment, these differences will be explained, and explanations of the same points will be omitted.

[0032] ***Configuration Description*** The configuration of the reception-side management device 20 according to the second embodiment will be described with reference to FIG. 2 in that the reception-side management device 20 includes an approval request unit 214 as a functional component. The function of the approval request unit 214 is realized by software, like the other functional components.

[0033] ***Explanation of Operation*** The operation of the reception-side management device 20 according to the second embodiment will be described with reference to FIG.

[0034] The process of step S21 in Fig. 6 is the same as the process of step S11 in Fig. 3. Moreover, the processes of steps S24 to S26 in Fig. 6 are the same as the processes of steps S12 to S14 in Fig. 3.

[0035] In the second embodiment, the sending terminal 30 sends a file after specifying a sending method indicating any one of individual sending, batch sending, and confidential sending. That is, in step S21, the receiving unit 211 receives a file from the external network 90, for which a sending method indicating any one of individual sending, batch sending, and confidential sending is specified. In the case of confidential transmission, the sending terminal 30 also specifies the destination receiving terminal 40. Multiple receiving terminals 40 may be specified as the destination receiving terminal 40. Confidential transmission is a transmission method for sending a file to the destination receiving terminal 40 without going through approval.

[0036] (Step S22 in FIG. 6: Confidentiality Determination Process) The approval request unit 214 determines whether the transmission method designated for the file received in step S21 is individual transmission, batch transmission, or confidential transmission. If the transmission is individual or batch transmission, the approval request unit 214 advances the process to step S23. On the other hand, if the transmission is confidential, the approval request unit 214 determines that the file can be delivered without requesting approval, and advances the process to step S25.

[0037] In the case of individual transmission or batch transmission, the status updater 213 updates the reception status of the file in the file management information 231 to waiting for approval, like the file with the file ID 011 in FIG.

[0038] (Step S23 in FIG. 6: Approval request processing) The approval request unit 214 requests approval of the file received in step S21 and determines whether or not the file can be delivered. For example, the approval request unit 214 requests approval of the file from a manager or the like of the multiple receiving terminals 40 to which the receiving-side management device 20 is connected. Specifically, the approval request unit 214 sends an approval request message to the manager or the like. The manager or the like to whom approval has been requested checks the contents of the file and determines whether or not the file can be delivered to the delivery destination. If the approval request unit 214 determines that the content can be distributed, the process proceeds to step S24. On the other hand, if the approval request unit 214 determines that the content cannot be distributed, the process ends.

[0039] If it is determined that the file can be delivered, the status update unit 213 updates the receiving status of the file in the file management information 231 to approved, like the file with the file ID of 012 in Fig. 7. On the other hand, if it is determined that the file cannot be delivered, the status update unit 213 updates the receiving status of the file in the file management information 231 to undeliverable, like the file with the file ID of 013 in Fig. 7.

[0040] ***Effects of the second embodiment*** As described above, the receiving-side management device 20 according to the second embodiment distributes files after approval when the transmission method is individual transmission or batch transmission. On the other hand, the receiving-side management device 20 according to the second embodiment distributes files without approval when the transmission method is confidential transmission. If approval is given, the contents of the file will become known to the administrator, etc. By setting the transmission method to confidential transmission, it is possible to transmit files that should not be leaked even to the administrator, etc.

[0041] For example, suppose that a certain receiving terminal 40 is a computer that manages personnel information. In this case, when transmitting an update file for the managed information, the transmitting terminal 30 transmits the update file using confidential transmission as the transmission method, with the receiving terminal 40 that manages the personnel information as the destination. This makes it possible to reflect the update contents in the personnel information without leaking the update contents to the manager, etc.

[0042] Embodiment 3 The third embodiment differs from the second embodiment in that a file is divided and transmitted. In the third embodiment, this difference will be explained, and explanations of the same points will be omitted.

[0043] ***Explanation of Operation*** The operation of the reception-side management device 20 according to the third embodiment will be described with reference to FIGS.

[0044] The processing from step S31 to step S32 in Fig. 8 is the same as the processing from step S21 to step S22 in Fig. 6. The processing from step S34 to step S37 in Fig. 6 is the same as the processing from step S23 to step S26 in Fig. 6.

[0045] In the third embodiment, as shown in Fig. 9, the transmission side management device 10 divides a file transmitted by the transmission terminal 30 into a plurality of partial files and transmits each partial file separately. For example, the transmission side management device 10 may transmit each partial file via a different server. The file may be divided using an existing technique such as secret sharing. Here, the transmission side management device 10 may divide all files before transmitting them. Alternatively, the transmission side management device 10 may decide whether to divide a file or not depending on the confidentiality of the file. In the third embodiment, the transmission side management device 10 decides to divide a file when the transmission method is confidential transmission, and decides not to divide a file when the transmission method is individual transmission or batch transmission. Therefore, in step S31 of FIG. 8, the receiving unit 211 may receive a plurality of partial files or may receive an undivided file.

[0046] (Step S33 in FIG. 8: File integration process) The receiving unit 211 integrates the multiple partial files to restore the original file. The file integration method corresponds to the file division method, and existing technology may be used for the file integration method. Another possible modification is to store multiple file division rules in the transmission-side management device 10, randomly select a division rule when transmitting a file from the transmission-side management device 10, and transmit the selected division rule to the reception-side management device 20. According to this modification, it is possible to improve the obfuscation performance on the external network 90. One example of a file splitting rule is to fix the number of splits to n (n is any integer). In this case, the file size of the partial files will vary depending on the original file. Another possible rule is to fix the file size of each partial file after splitting. In this case, the file size will be constant, which has the advantage that it is difficult to determine the total number of partial files that have been split.

[0047] In this example, the receiving unit 211 integrates the multiple partial files. However, the receiving unit 211 may not integrate the multiple partial files, and the delivery unit 212 may deliver the multiple partial files to the destination receiving terminal 40. Then, the destination receiving terminal 40 may integrate the multiple partial files. In this way, when the transmission method is confidential transmission, the original file is restored for the first time at the destination receiving terminal 40, which reduces the possibility that the contents of the file will be discovered midway. Also, information required for integrating the files may be sent to the destination receiving terminal 40 via a route separate from that for the partial files. This makes it impossible for the receiving side management device 20, etc. to restore the original file, reducing the possibility that the contents of the files will be discovered midway.

[0048] ***Effects of the Third Embodiment*** As described above, the transmission side management device 10 according to the third embodiment determines whether or not to divide a file depending on the transmission method. This allows highly confidential files to be transmitted more safely through the external network 90. ​​On the other hand, the reception side management device 20 according to the third embodiment can determine whether or not to combine files depending on the transmission method.

[0049] ***Other configurations*** <Variation 1> In the first to third embodiments, each functional component is realized by software. However, as a first modification, each functional component may be realized by hardware. Regarding the first modification, differences from the first embodiment will be described. In the first modification, an example in which the receiving-side management device 20 according to the first embodiment is modified will be described.

[0050] The configuration of the reception-side management apparatus 20 according to the first modification will be described with reference to FIG. When each functional component is realized by hardware, the receiving-side management device 20 includes an electronic circuit 25 instead of the processor 21, the memory 22, and the storage 23. The electronic circuit 25 is a dedicated circuit for realizing the functions of each functional component, the memory 22, and the storage 23.

[0051] The electronic circuit 25 may be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, a GA, an ASIC, or an FPGA. GA is an abbreviation for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuit. FPGA is an abbreviation for Field-Programmable Gate Array. Each functional component may be realized by one electronic circuit 25, or each functional component may be distributed across multiple electronic circuits 25.

[0052] <Variation 2> As a second modification, some of the functional components may be realized by hardware, and other functional components may be realized by software.

[0053] The processor 21, the memory 22, the storage 23, and the electronic circuit 25 are collectively referred to as a processing circuit. In other words, the functions of the respective functional components are realized by the processing circuit.

[0054] Furthermore, the term "part" in the above description may be read as a "circuit," "step," "procedure," "processing," or "processing circuit."

[0055] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) a receiving-side management device connected to a plurality of receiving terminals via an internal network, a receiving unit that receives a file designated with a transmission method indicating either individual transmission or batch transmission from an external network; a distribution unit that distributes the file by making the file received by the receiving unit via the internal network accessible only to a destination receiving terminal among the plurality of receiving terminals when the individual transmission is specified as the transmission method, and by making the file received by the receiving unit via the internal network accessible to each of the plurality of receiving terminals when the batch transmission is specified as the transmission method; A receiving-side management device comprising: (Appendix 2) The delivery unit transmits the file to the destination receiving terminal via the internal network when the individual transmission is specified as the transmission method, and stores the file in a file storage area set to be accessible by the multiple receiving terminals via the internal network when the batch transmission is specified as the transmission method. 2. A receiving-side management device as described in claim 1. (Appendix 3) The receiving side management device further An approval request section for requesting approval of the file and determining whether or not the file can be distributed. Equipped with The distribution unit distributes the file when the approval request unit determines that the file is available for distribution. 3. A receiving-side management device according to claim 1 or 2. (Appendix 4) the transmission method indicates one of the individual transmission, the batch transmission, and the confidential transmission, When the confidential transmission is designated as the transmission method, the approval request unit determines that the file is deliverable without requesting approval for the file. 4. A receiving-side management device as described in appendix 3. (Appendix 5) The receiving side management device further a status update section which updates a distribution status of the file when the file is received by the receiving section and when the file is distributed by the distribution section, thereby making it possible to confirm a source of the file; 5. The receiving-side management device according to claim 1, further comprising: (Appendix 6) the transmission method is determined according to the contents of the file, The delivery unit delivers the file in accordance with the transmission method specified from the contents of the file received by the receiving unit. 6. A receiving-side management device according to any one of appendixes 1 to 5. (Appendix 7) The file is transmitted in a state where it is divided into a plurality of partial files, The receiving unit receives the plurality of partial files and integrates them to restore the file. 7. A receiving-side management device according to any one of claims 1 to 6. (Appendix 8) The file may or may not be divided into the plurality of partial files depending on the transmission method. 8. The receiving-side management device according to claim 7. (Appendix 9) A receiving-side management method for a receiving-side management device connected to a plurality of receiving terminals via an internal network, The computer receives a file from an external network, the file having a transmission method designated to indicate either individual transmission or batch transmission; A receiving side management method in which a computer distributes a file by using the internal network to make the file accessible only to a destination receiving terminal among the multiple receiving terminals when individual transmission is specified as the transmission method, and by using the internal network to make the file accessible to each of the multiple receiving terminals when batch transmission is specified as the transmission method. (Appendix 10) a receiving-side management program for a receiving-side management device connected to a plurality of receiving terminals via an internal network, a receiving process for receiving a file from an external network, the file being specified as a sending method indicating either individual sending or batch sending; A distribution process for distributing the file by making the file received by the receiving process accessible only to a destination receiving terminal among the plurality of receiving terminals using the internal network when the individual transmission is specified as the transmission method, and making the file received by the receiving process accessible to each of the plurality of receiving terminals using the internal network when the batch transmission is specified as the transmission method. A receiving-side management program that causes a computer to function as a receiving-side management device that performs the above steps.

[0056] The above describes the embodiments and modifications of the present disclosure. Some of these embodiments and modifications may be combined and implemented. Also, one or some of them may be partially implemented. Note that the present disclosure is not limited to the above embodiments and modifications, and various modifications are possible as necessary. [Explanation of symbols]

[0057] 100 file transmission system, 10 transmitting side management device, 20 receiving side management device, 21 processor, 22 memory, 23 storage, 24 communication interface, 25 electronic circuit, 211 receiving unit, 212 distribution unit, 213 status update unit, 214 approval request unit, 231 file management information, 30 transmitting terminal, 40 receiving terminal, 90 external network, 91 internal network, 92 internal network.

Claims

1. a receiving-side management device connected to a plurality of receiving terminals via an internal network, a receiving unit that receives a file designated with a transmission method indicating either individual transmission or batch transmission from an external network; When the individual transmission is designated as the transmission method, the file received by the receiving unit using the internal network is made accessible only to a destination receiving terminal among the plurality of receiving terminals; a distribution unit that distributes the file by making the file received by the receiving unit accessible to each of the plurality of receiving terminals using the internal network when the batch transmission is designated as the transmission method; A receiving-side management device comprising:

2. The delivery unit transmits the file to the destination receiving terminal via the internal network when the individual transmission is specified as the transmission method, and stores the file in a file storage area set to be accessible by the multiple receiving terminals via the internal network when the batch transmission is specified as the transmission method.

2. The receiving side management device according to claim 1.

3. The receiving side management device further An approval request section for requesting approval of the file and determining whether or not the file can be distributed. Equipped with The distribution unit distributes the file when the approval request unit determines that the file is available for distribution.

2. The receiving side management device according to claim 1.

4. the transmission method indicates one of the individual transmission, the batch transmission, and the confidential transmission, When the confidential transmission is designated as the transmission method, the approval request unit determines that the file is deliverable without requesting approval for the file.

4. The receiving side management device according to claim 3.

5. The receiving side management device further a status update section which updates a distribution status of the file when the file is received by the receiving section and when the file is distributed by the distribution section, thereby making it possible to confirm a source of the file; The receiving side management device according to claim 1 .

6. the transmission method is determined according to the contents of the file, The delivery unit delivers the file in accordance with the transmission method identified from the contents of the file received by the receiving unit.

2. The receiving side management device according to claim 1.

7. The file is transmitted in a state where it is divided into a plurality of partial files, The receiving unit receives the plurality of partial files and integrates them to restore the file.

2. The receiving side management device according to claim 1.

8. The file may or may not be divided into the plurality of partial files depending on the transmission method.

8. The receiving side management device according to claim 7.

9. A receiving-side management method for a receiving-side management device connected to a plurality of receiving terminals via an internal network, The computer receives a file from an external network, the file having a transmission method designated to indicate either individual transmission or batch transmission; A receiving side management method in which a computer distributes a file by using the internal network to make the file accessible only to a destination receiving terminal among the multiple receiving terminals when individual transmission is specified as the transmission method, and by using the internal network to make the file accessible to each of the multiple receiving terminals when batch transmission is specified as the transmission method.

10. a receiving-side management program for a receiving-side management device connected to a plurality of receiving terminals via an internal network, a receiving process for receiving a file from an external network, the file being specified as a sending method indicating either individual sending or batch sending; A distribution process for distributing the file by making the file received by the receiving process accessible only to a destination receiving terminal among the plurality of receiving terminals using the internal network when the individual transmission is specified as the transmission method, and making the file received by the receiving process accessible to each of the plurality of receiving terminals using the internal network when the batch transmission is specified as the transmission method. A receiving-side management program that causes a computer to function as a receiving-side management device that performs the above steps.

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