JP2015046024A - Data file management method, data file management system, device thereof, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote operation technique hardly influenced by a communication situation.SOLUTION: A first device accepts an instruction by a user on file operation of a data file stored in a second device other than the first device among a plurality of devices, and outputs a command data file, which is a file including an instruction on file operation and information capable of identifying for which data file the instruction is made. The second device accepts the command data file, and performs the instruction on the data file, which is an object of the instruction, stored in a storage unit of the second device according to the instruction on file operation and the information capable of identifying for which data file the instruction is made included in the command data file.

Description

  The present invention relates to a technique for performing data file management by remotely operating a device from a remote location.

There are the following methods for using information such as document files stored in a PC at home / office on the go.
(1) Store necessary information in an external storage medium such as a portable USB memory before going out and take it out when going out.
(2) Before going out, necessary information is transmitted as an attached file of an e-mail to a destination that can be received at the place of going out, and is received at the place of going out.
(3) Before going out, store the necessary information in online storage provided on the Internet (for example, see Non-Patent Document 1), and obtain the information from the storage location of the online storage when going out To do.
(4) A remote desktop for transferring the screen of the company / home PC to a terminal device outside the office and displaying it, and remotely operating the PC of the company / home based on the display information (for example, see Non-Patent Document 2) Is used to remotely operate a company / home PC from outside and browse / edit information in the PC.

Biz Storage File share, [online], NTT Communications, location, page, [Search August 9, 2013], Internet <http://www.ntt.com/bst-sh/data/cp06.html? banner_id = k_g_shst006 & wapr = 52044af4> Remote office "Biz Communicator", [online], July 29, 2013, NTT Communications, [Search August 9, 2013], Internet <http://www.ntt.com/bzc/?banner_id= k_g_pspr053 & wapr = 52044b60>

  However, in the conventional methods (1) to (3), before going out, information necessary for going out must be transmitted and stored in advance on the office / home PC so that the information can be used at the going place. I must. In addition, there is a risk of leaking necessary information to the outside. Necessary information can be kept secret by encryption processing. However, in this case, it is necessary to input a password every time information is stored / viewed, and the number of procedures for use increases. On the other hand, the conventional method (4) does not cause such a problem.

  However, the conventional method (4) has a problem that it is easily affected by the communication status. For example, the conventional method (4) is based on the premise that the PC and the terminal device are always connected. If the PC application is not started or the power is not turned on, remote control processing is performed. If the communication cannot be performed at all and frequent communication disconnection occurs during movement, the remote operation cannot be continued. Such a problem is not only when information necessary for a fixed information processing apparatus such as a company / home PC is stored, and when the information is used by a portable information processing apparatus such as a terminal device in the place of going out, Information necessary for a certain fixed information processing apparatus or portable information processing apparatus is stored, and the information is used by another fixed information processing apparatus or portable information processing apparatus connected to the information processing apparatus via a network. It is a problem that arises in some cases.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a remote operation technique that is not easily affected by the communication status.

  Data files are managed by a plurality of devices connected via a network. A first device, which is one of a plurality of devices, accepts an instruction from a user regarding a file operation on a data file stored in a second device other than the first device among the plurality of devices. A command data file, which is a file including information that can identify an instruction for file operation and which data file the instruction is for, is output. The second device accepts the command data file, and is subject to the instruction according to information included in the command data file that can identify an instruction for file operation and which data file the instruction is for. The instruction is executed on the data file stored in the storage unit of the second device.

  The command data file of the present invention is a file and can be stored and transferred by the same mechanism as a normal data file. Therefore, the first device and the second device do not always need to be in a connected state during the remote operation, and are less susceptible to the communication status than in the past.

FIG. 1 is a diagram illustrating a functional configuration of the system. FIG. 2 is a diagram illustrating management information. 3A to 3D are diagrams illustrating command data. 4A and 4B are diagrams illustrating command data. 5A and 5B are diagrams illustrating command data. 6A and 6B are diagrams illustrating command data. FIG. 7 is a diagram illustrating a management file list screen. FIG. 8A is a diagram illustrating a file acquisition condition setting screen, and FIG. 8B is a diagram illustrating a mail acquisition condition setting screen. FIG. 9 is a diagram illustrating a file search result list screen. FIG. 10 is a diagram illustrating a mail search result list screen. FIG. 11 is a diagram illustrating a transmitted mail input screen. FIG. 12 is a diagram illustrating a file attribute setting screen.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<Realization configuration>
As illustrated in FIG. 1, the system according to the present embodiment is an information processing apparatus 100 that is an information processing apparatus having a communication function used in a place where the user is away from home, and an information processing apparatus that has a communication function used in an office or the like. A certain device 200 and a relay device 250 arranged on the cloud or the like are included. This is merely an example, and the device 100 may be a device used in an office or the like, or the device 200 may be a device used in a place where the user is out. The relay device 250 may be arranged on the LAN. In FIG. 1, one each of the devices 100 and 200 and the relay device 250 are illustrated, but this does not limit the present invention. That is, the device 100, the device 200, and the relay device 250 may be singular or plural. In addition, there may be other devices that are not the devices 100 and 200 and the relay device 250 and have a communication function.

  The devices 100 and 200 and the relay device 250 are configured by, for example, a predetermined program (software) being read into a known computer having a CPU (central processing unit), a RAM (random-access memory), a communication device, and the like. The “Computer” means a general term for automatic computers that operate according to instructions of a program, and its specific configuration is not limited. Examples of “computers” include personal computer devices (desktop type, laptop type, notebook type, etc.), server devices, smartphone terminal devices, tablet type computer devices, PDA (Personal Data Assistance), mobile phone devices, hard disk recorders and televisions. An audio device such as John Set, a game machine, etc. In addition, at least some of the functional configurations of the devices 100 and 200 and the relay device 250 may be configured only by hardware such as an integrated circuit. The device 200 and the relay device 250 are connected to a network, and communication is possible between the device 200 and the relay device 250. The device 100 and the relay device 250 are also network-connected by a network such as a mobile phone line or WiFi (registered trademark), and communication between the device 100 and the relay device 250 is possible.

  As illustrated in FIG. 1, the apparatus 100 includes, for example, a UI (User Interface) processing unit 101, a command generation unit 102, an encryption unit 103, a data management storage unit 104, a data division processing unit 105, a data transmission unit 106, The data receiving unit 107, the data combination processing unit 108, the decoding unit 109, the search unit 110, and the command processing unit 111 are included. The apparatus 200 includes, for example, a UI processing unit 201, a command generation unit 202, an encryption unit 203, a data management storage unit 204, a data division processing unit 205, a data transmission unit 206, a data reception unit 207, a data combination processing unit 208, a decryption unit A unit 209, a search unit 210, a command processing unit 211, and a mail processing unit 212. The relay device 250 includes, for example, a data reception unit 251, a data management storage unit 252, a data transmission unit 253, and a data deletion processing unit 254.

<File system>
The device 100, the device 200, and the relay device 250 each have a file system, and each device 100, 200, 250 manages a file separately. In this embodiment, information transfer between the devices is performed. Furthermore, one large file system is configured. As a result, the user can view and edit the file without being aware of which storage device the file is stored in. A “file system” is a collection of abstract data types, and means a mechanism for storage, hierarchical structure, data manipulation, access, and retrieval (for example, “Hisao Yazawa,” "Basics of Information Processing Technology", Nihon Jitsugyo Publishing, p111 file system "). A file system is a method for recording and managing files in a storage device. In other words, the file system is a mechanism for providing an interface when a device accesses a file. The file system is one of functions that an OS (Operating System) has, for example. Examples of file systems are FAT, NTFS, HFS, ext2, ext3, ext4, WAFL, ISO9660, ODS-5, UDF, HPFS, JFS, UFS, VTOC, XFS, and the like. “File” means a logical unit of arbitrary data stored and managed in the file system. Each file is given unique identification information (file name, file ID, etc.) for identifying and specifying them. Examples of general files are document files, database files, spreadsheet files, image files, music files, moving image files, program files, e-mail files, encrypted files, and the like. The file is stored in a state associated with the file name, and accessed based on identification information such as the file name. The file is transferred in a state associated with the identification information, and stored in a state associated with the identification information at the transfer destination. As a result, even when a plurality of devices are not in communication at the same time, a part of the devices transfers a file associated with the identification information to the storage device, and the other devices store the identification information. Can be used to obtain the file from the storage device. “Transfer” in the present embodiment means transmission of information through a network. In this way, files can be transferred between devices regardless of the communication state between the devices.

<Transfer of Usage Data Between Device 100 / Device 200>
First, a process in which the apparatus 200 according to this embodiment transfers usage data to the apparatus 100 will be described.
≪File specification process≫
The user inputs information for designating a file to be stored in the data management storage unit 204 to the UI processing unit 201 of the apparatus 200. This file may be a file stored in a storage device (not shown), may be a file downloaded from a website on the network, or may be a file input from the UI processing unit 201. There may be. The UI processing unit 201 stores the designated file in the data management storage unit 204 and sends it to the encryption unit 203.

<< Management information generation process >>
The data management storage unit 204 generates management information 300 for managing files stored in the data management storage unit 204. The management information 300 is information representing the characteristics and attributes of the management target file. As illustrated in FIG. 2, the management information 300 according to the present embodiment includes a storage device that is a file ID of a management target file, a file name, a file size, a file update date, and an ID of a device that originally stored the file. ID, original storage location of the file, file expiration date, file status, file upload date, file download date, attribute information (1) indicating whether the file is editable or read-only, and file update history It is assumed that attribute information (2) indicating whether to store or not is stored. If the management information 300 of the management target file has already been generated, << management information generation processing >> may be omitted.

≪File encryption process≫
The encryption unit 203 encrypts the transmitted file (for example, there is an encryption algorithm such as AES (Advanced Encryption Standard)), and associates the encrypted file (data file) with its management information 300. And stored in the data management storage unit 204.

≪Use data transfer process≫
Usage data stored in the data management storage unit 204 (a set of the encrypted file and its management information 300 is referred to as “usage data”) is sent to the data division processing unit 205. The data division processing unit 205 divides the usage data into a certain size (for example, 1 megabyte) that can be transmitted at a time by communication. The divided use data is sent to the data transmission unit 206, and from there, is transmitted to the relay device 250 arranged in the cloud. When communication between the device 200 and the relay device 250 is disconnected (in a non-communication state), the data transmission unit 206 waits for data transmission, and the communication connection between the device 200 and the relay device 250 Data transmission is performed after If communication between the device 200 and the relay device 250 is interrupted during data transmission, the data transmission unit 206 interrupts data transmission and resumes data transmission after communication connection is established again. The transmitted usage data is received by the data receiving unit 251 in the relay device 250 and stored in the data management storage unit 252.

  The data management storage unit 104 of the device 100 inquires the relay device 250 whether there is usage data stored in the data management storage unit 252 in the relay device 250 at a predetermined opportunity. Specifically, the data transmission unit 106 transmits information for inquiry to the relay device 250. On the other hand, the data transmission unit 253 of the relay device 250 returns information indicating the presence / absence of usage data stored in the data management storage unit 252 and identification information of the stored usage data to the device 100. The data management storage unit 104 of the device 100 uses the information returned from the relay device 250 and, among the usage data stored in the data management storage unit 252 in the relay device 250, is not yet stored in the data management storage unit 104. Determine if there is any usage data. When there is usage data that is not yet stored in the data management storage unit 104, the data management storage unit 104 transmits information for requesting transmission of the usage data from the data transmission unit 106 to the relay device 250, and the relay device 250 returns the usage data. Usage data returned from the relay device 250 is received by the data receiving unit 107 and sent to the data combination processing unit 108. The data combination processing unit 108 combines the usage data divided at the time of data transmission, and stores the combined usage data in the data management storage unit 104. Here, communication between the device 100 and the relay device 250 in the cloud may be interrupted or disconnected, and the device 100 may not be able to receive all the divided usage data at once. In such a case, the data combination processing unit 108 instructs the data receiving unit 107 to receive usage data that has not yet been received after the communication is restored. As a result, the data management storage unit 104 stores the same usage data as the usage data stored in the data management storage unit 204 in the apparatus 200. When the usage data is stored in the data management storage unit 104, the UI processing unit 101 displays the management file list screen 400 illustrated in FIG. The management file list screen 400 in this example includes a data list 401 of usage data stored in the data management storage unit 104, a message display field 403 for displaying a message for notifying data reception, an update button 402, a display button 404, a save button. 405, delete button 406, remaining time change button 407, file acquisition button 408, mail acquisition button 409, mail transmission button 410, and attribute change button 411.

  In addition, although the example which transfers utilization data from the apparatus 200 to the apparatus 100 was demonstrated, since the structure of both is the same, you may transfer utilization data from the apparatus 100 to the apparatus 200. That is, the apparatus 100 may execute the process executed by the apparatus 200 as described above, and the apparatus 200 may execute the process executed by the apparatus 100 as described above. In << file specification process >> when transferring usage data from the apparatus 100 to the apparatus 200, the user inputs information for specifying a file to be stored in the data management storage section 104 to the UI processing section 101 of the apparatus 100. To do. The UI processing unit 101 stores the designated file in the data management storage unit 104 and sends it to the encryption unit 103. In this case, << management information generation process >> (can be omitted if the management information 300 for managing this file already exists), the data management storage unit 104 uses the management information 300 for managing this file. Generate. In << file encryption processing >> in this case, the encryption unit 103 encrypts the transmitted file, and stores the encrypted file and its management information 300 in the data management storage unit 104 in association with each other. In << use data transfer processing >> in this case, the use data stored in the data management storage unit 104 (the encrypted file and its management information are sent to the data division processing unit 105, and the data division processing unit 105 The usage data is divided into a certain size that can be sent at a time by communication, and the divided usage data is sent to the data transmission unit 106 and then sent to the relay device 250 arranged in the cloud. The data is stored in the data management storage unit 252. The data management storage unit 204 inquires of the relay device 250 whether there is usage data stored in the data management storage unit 252 in the relay device 250 at a predetermined opportunity. The data transmission unit 253 of the relay device 250 includes information indicating the presence / absence of usage data stored in the data management storage unit 252 and information stored therein. Data identification information and the like are returned to the device 200. If there is usage data that has not yet been stored in the data management storage unit 204, the relay device 250 returns the usage data, and the usage data returned from the relay device 250 is returned. The received data is received by the data receiving unit 207, combined by the data combining processing unit 208, and the combined usage data is stored in the data management storage unit 204.

  Similarly, usage data may be transferred from the device 200 to the plurality of devices 100, or usage data may be transferred from the device 100 to the plurality of devices 200. Usage data may be transferred from the device 100 or 200 to other devices.

<Data storage, display and editing>
Next, data storage, display, and editing processes will be described.
The user can input information for selecting specific usage data from the data list 401 and an instruction to press the display button 404 or the save button 405 to the UI processing unit 101 (for example, click input). By this operation, the UI processing unit 101 in the apparatus 100 instructs the decryption unit 109 to decrypt the encrypted file of the selected usage data. Upon receiving this instruction, the decryption unit 109 decrypts the encrypted file to obtain a file. The obtained file is stored in the data management storage unit 104. If the display button 404 is pressed, the obtained file is further displayed from the UI processing unit 101.

  When the attribute information (1) in the management information 300 corresponding to the obtained file indicates “editable”, this file can be edited. On the other hand, when the attribute information (1) is “read only”, this file cannot be edited. When the attribute information (1) indicates “editable”, the user can input the editing content of the file to the UI processing unit 101. The UI processing unit 101 edits the file according to the editing content. The edited file is stored in the data management storage unit 104. When the user finishes editing and completes the output of the file from the UI processing unit 101, the data management storage unit 104 edits the items (size, update date, etc.) of the management information 300 corresponding to the edited file. Update with later files. The edited file and the updated management information 300 are associated with each other and stored in the data management storage unit 104.

  Thereafter, for the edited file and the updated management information 300, the “file encryption process” << the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the updated usage data (a set of the encrypted edited file and the updated management information 300 is referred to as “updated usage data”) passes from the device 100 via the relay device 250. To the device 200. When the data management storage unit 204 of the device 200 receives the updated usage data, the data management storage unit 204 edits the edited file based on the storage location and file name included in the updated usage data management information 300 And the updated management information 300 overwrite the file before the update and the management information 300 to complete the file update. Through the above flow, the editing result by the device 100 at the remote location is reflected in the device 200. Similarly, the updated usage data may be transferred from the device 100 to the plurality of devices 200 via the relay device 250 and reflected on each device 200. In addition, when there are a plurality of apparatuses 100, the updated usage data may be transferred from the apparatus 100 to the other apparatuses 100 via the relay apparatus 250 and reflected on each apparatus 100. Alternatively, the updated usage data may be transferred from the device 100 or 200 to other devices and reflected in the respective devices.

  When the updated usage data is received by the apparatus 200, if the attribute information (1) of the usage data management information 300 is set to store the update history, the data management storage unit 204 stores the original usage data. Before overwriting the file (file managed by the file system used by the user of the apparatus 200), other preset areas of the apparatus 200 (other than the area where the updated data file is overwritten) Save the file before overwriting to Thereby, the user can confirm the update history of the file later, or can restore the file before the update. Similarly, when the updated usage data is received by the apparatus 100, if the attribute information (1) of the usage data management information 300 is set to store the update history, the data management storage unit 104 stores the original usage data. Before overwriting the file, the file before overwriting may be stored in another preset area of the apparatus 100.

<Delete data>
Next, data deletion processing will be described.
When the management file list screen 400 is displayed on the UI processing unit 101 of the apparatus 100, the user inputs information for designating one or more selected usage data to the UI processing unit 101, and a delete button 406. It is possible to input a push-down instruction (instruction by the user). This instruction is “an instruction for file operation on a data file stored in the data management storage unit 104”, and “an instruction to delete a data file or a part of the data file stored in the data management storage unit 104”. is there. For example, this instruction is an instruction to delete encrypted data managed by the data management storage unit of the devices 100, 200, and 250. As a result, the selected usage data or the encrypted file included in the usage data is deleted from the data management storage unit 104. The deletion of the usage data from the data management storage unit 104 or the encrypted file included in the usage data is performed on the management file that manages the usage data stored in the data management storage unit 104. It may be performed by adding a change indicating that the data has been deleted (for example, deleting the information indicating the storage location of the usage data to be deleted) or the deletion target stored in the data management storage unit 104 A change indicating that the encrypted file has been deleted is added to the management information 300 of the usage data (for example, the “status” of the management information 300 is set to a code indicating “delete”, or the deletion target The information indicating the storage location of the encrypted file may be deleted). Further, the usage data stored in the data management storage unit 104 or the encrypted file itself included in the usage data may be deleted. In addition, the data management storage unit 104 instructs the data deletion processing unit 254 in the relay apparatus 250 via the data transmission unit 106 to store the same data as the data deleted from the data management storage unit 104. It is deleted from the part 252.

  Further, the command generation unit 102 generates command data 310 that is a file including an instruction to delete the same data as the deleted data (usage data or an encrypted file included in the use data). For example, the command data 310 illustrated in FIG. 3A includes a command type (file deletion), a target file ID number that is the number of files with a file ID to be deleted, and a target file ID that is a file ID of the file to be deleted. . The command data 310 is stored in the data management storage unit 104. Thereafter, using the command data 310 as a “file”, the “management information generation process” << the file encryption process >> << the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 310 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 310” corresponds to “a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is directed”. That is, the apparatus 100 outputs a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is, and the apparatus 200 receives the command data file. .

  The decryption unit 209 of the device 200 receives the encrypted command data 310 and decrypts it to obtain the command data 310. The command data 310 is sent to the command processing unit 211. The command processing unit 211 deletes the usage data to be deleted indicated by the command data 310 or the encrypted file included in the usage data from the data management storage unit 204 (that is, the file operation included in the command data file) The instruction is executed for the data file stored in the data management storage unit 204 of the apparatus 200 that is the target of the instruction according to the information that can identify the instruction about the data and to which data file the instruction is directed. To do). For example, the command processing unit 211 deletes the usage data corresponding to the file ID indicated by the command data 310 or the encrypted file included in the usage data from the data management storage unit 204. Note that the deletion of the usage data from the data management storage unit 204 or the encrypted file included in the usage data is performed on the management file that manages the usage data stored in the data management storage unit 204. May be performed by adding a change indicating that the data has been deleted (adding a change indicating that the data file or a part of the data file has been deleted to the management file in the apparatus 200); This may be performed by setting the “state” of the management information 300 to a code indicating deletion (indicating that a data file or a part of the data file has been deleted from the management file in the apparatus 200). The management information (300) of the usage data to be deleted stored in the data management storage unit 204 is encrypted. May be performed by adding a change indicating that the deleted file has been deleted (adding a change indicating that the data file or a part of the data file has been deleted to the management file in the apparatus 200). . Further, it may be performed by deleting the usage data stored in the data management storage unit 204 or the encrypted file itself included in the usage data (deleting the data file or a part of the data file).

  When there are a plurality of devices 100, as with the device 200, the other devices 100 receive the encrypted command data 310 and its management information, decrypt the encrypted command data 310, and execute the command data. 310 may be obtained and the usage data indicated by the command data 310 may be deleted. Further, the apparatus 200 may execute the process of the apparatus 100, and the apparatus 100 may execute the process of the apparatus 200. In addition, a device other than the devices 100 and 200 receives the encrypted command data 310 and its management information, decrypts the encrypted command data 310, obtains the command data 310, and uses indicated by the command data 310 Data may be deleted.

<Automatic deletion by expiration date>
Next, automatic deletion processing based on the expiration date will be described.
In this embodiment, when the usage data is transferred as described above in <Transfer of Usage Data Between Device 100 / Device 200>, an expiration date (for example, 3 days) based on that point is automatically set, and the expiration date is set. Is recorded in the usage data management information 300 as “expiration date”. Further, the “remaining time” calculated from the “expiration date and time” and the current time is also displayed in the data list 401 of the management file list screen 400. When the remaining time becomes zero, that is, when the expiration date / time has passed, the devices 100 and 200 and the relay device 250 delete the usage data that has passed the expiration date / time from the data management storage units 104, 204, and 252. Are executed in the same procedure as the above-mentioned <Delete data>.

<Setting or changing the remaining time (setting or changing the expiration date)>
Next, the remaining time setting or changing process will be described.
The user selects one or more usage data from the data list 401 of the management file list screen 400 displayed on the UI processing unit 101 of the apparatus 100, and provides information for specifying the selected usage data to the UI processing unit 101. In addition, an instruction to push down the remaining time change button 407 can be input. As a result, the user can input the setting content or change content (instruction by the user) of the expiration date to the UI processing unit 101. Then, according to an instruction from the UI processing unit 101, the data management storage unit 104 sets or changes the “expiration date / time” of the management information 300 of the selected usage data according to the change contents of the input expiration date. 300 is updated.

  Further, the command generation unit 102 is a file that includes an instruction for setting or changing the “expiration date / time” of the management information 300 of the selected usage data according to the change contents of the input expiration date. Command data 320 is generated. For example, the command data 320 illustrated in FIG. 3B includes a command type (expiration date change), an expiration date / time (expiration date change content), a target file ID number that is the number of files of the file ID to be set or changed, and The target file ID that is the file ID of the setting or target file is included. The command data 320 is stored in the data management storage unit 104. Thereafter, using the command data 320 as a “file”, the “management information generation process” << the file encryption process >> << the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 320 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 320” corresponds to “command data file that is a file including information that can identify an instruction”. That is, the device 100 outputs a command data file that is a file including information that can identify an instruction, and the device 200 receives the command data file.

  The decryption unit 209 of the device 200 receives the encrypted command data 320 and decrypts it to obtain the command data 320. The command data 320 is sent to the command processing unit 211. The command processing unit 211 sets or changes the “expiration date / time” of the management information 300 of the usage data indicated by the command data 320 among the usage data stored in the data management storage unit 204 according to the command data 320. The command data 320 is updated (that is, the instruction is executed according to information included in the command data file that can identify the instruction). For example, the command processing unit 211 sets or changes the “expiration date / time” of the file management information 300 of the file ID indicated by the command data 320 to the expiration date / time indicated by the command data 320.

  When there are a plurality of devices 100, as with the device 200, the other devices 100 receive the encrypted command data 320 and its management information, and decrypt the encrypted command data 320 to obtain the command data. 320, the “expiration date / time” of the management information 300 of the usage data indicated by the command data 320 may be set or changed according to the command data 320. Further, the apparatus 200 may execute the process of the apparatus 100, and the apparatus 100 may execute the process of the apparatus 200. In addition, a device other than the devices 100 and 200 receives the encrypted command data 320 and its management information, decrypts the encrypted command data 320, obtains the command data 320, and uses indicated by the command data 320 The “expiration date / time” of the data management information 300 may be set or changed according to the command data 320.

<Request file>
Next, file acquisition processing will be described. The device 100 can obtain a file from the device 200. File acquisition consists of << remote file search processing >> and << file acquisition processing >>.
≪Remote file search process≫
The UI processing unit 101 of the apparatus 100 can display a file acquisition condition setting screen 500 for inputting search conditions for a file to be acquired. For example, the file acquisition condition setting screen 500 illustrated in FIG. 8A has a condition input field 501 in which search conditions (file name, storage location, extension, update date, size) of a file to be acquired from the apparatus 200 are input. A file search button 502 for instructing and a cancel button 503 are included. This search condition may be a search target for “files used by the user” managed by the file system of the apparatus 200, or may be a search target for only a part thereof. Good. The user can input the search condition on the file acquisition condition screen 500 displayed on the UI processing unit 101 of the apparatus 100 and can further input an instruction to push down the file search button 502 or the cancel button 503. . When the search condition is input and an instruction to push down the file search button 502 (instruction by the user) is input, the command generation unit 102 is a file including an instruction to search for a file that matches the search condition in the device 200. Some command data 330 is generated. For example, the command data 330 illustrated in FIG. 3C includes a command type (file search) and a file search condition described by, for example, an SQL (http://en.wikipedia.org/wiki/SQL) sentence. In addition, for example, the file search condition may be described by simply listing the conditions of the file name, storage location, extension, update date, and size. Here, the “instruction by the user” is “an instruction on a file operation for the data file stored in the apparatus 200”, and “a data file stored in the apparatus 200 or a part of the data file is transferred to the apparatus 200”. "Instruction to copy to 100". The command data 330 is stored in the data management storage unit 104. Thereafter, using the command data 330 as a “file”, the “management information generation process” << the file encryption process >><< the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 330 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 330” corresponds to “command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is directed”. That is, the apparatus 100 outputs a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is, and the apparatus 200 receives the command data file. .

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 330 and decrypts it to obtain the command data 330. The command data 330 is sent to the command processing unit 211. Then, the command processing unit 211 instructs the search unit 210 to search for a file under the search condition indicated by the command data 330. The search unit 210 searches for a file used by the user in the device 200 in accordance with a search condition indicated by the command data 330 (for example, a search condition described by an SQL sentence), and a search result including use data corresponding to the search condition Is output.

  The search result is sent to the command generation unit 202, and the command generation unit 202 generates command data 350 that is a file including the search result. For example, the command data 350 illustrated in FIG. 4A includes a command type (file search result), a search file number that is the number of use data that matches the search condition, and search file information (file name, file name, use data that matches the search condition). Size, update date, storage location). Command data 350 is stored in the data management storage unit 204. Thereafter, using the command data 350 as a “file”, the “management information generation process” << the file encryption process >> << the usage data transfer process >> of “when the usage data is transferred from the apparatus 200 to the apparatus 100” described above is executed. . As a result, the encrypted command data 350 and its management information are output from the device 200 and transferred to the device 100 via the relay device 250.

  The decryption unit 109 of the apparatus 100 receives the encrypted command data 350 and decrypts it to obtain the command data 350. The command data 350 is stored in the data management storage unit 104 and sent to the command processing unit 111. The command processing unit 111 uses the command data 350 to generate information for displaying the file search result list screen 520 and sends the information to the UI processing unit 101. The UI processing unit 101 displays the file search result list screen 520 based on this. For example, the file search result list screen 520 illustrated in FIG. 9 includes a search result list 521 representing search file information (file name, size, update date, storage location), a file acquisition button 522, and a cancel button 523.

≪File acquisition process≫
As described above, the UI processing unit 101 displays the file search result list screen 520. Even after the display of the file search result list screen 520 is finished, the UI processing unit 101 displays the management file list screen 400, designates “file search result” in the data list 401, and presses the display button 404 down. When an instruction (instruction by the user) is input to the UI processing unit 101, the file search result list screen 520 is displayed again. The user selects one or more pieces of use data from the search result list 521 on the file search result list screen 520, inputs information for specifying the selected use data to the UI processing unit 101, and further receives a file acquisition button 522. Can be entered. As a result, the command generation unit 102 generates command data 370 for instructing transfer of the selected usage data. For example, the command data 370 illustrated in FIG. 4B includes a command type (file acquisition), the number of target files that are the number of files to be acquired, and a target file (file name, storage location) that is information indicating the files to be acquired. . Command data 370 is stored in the data management storage unit 104. Thereafter, using the command data 370 as a “file”, the “management information generation process” << the file encryption process >><< the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 370 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 370” corresponds to “a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is directed”. That is, the apparatus 100 outputs a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is, and the apparatus 200 receives the command data file. .

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 370 and decrypts it to obtain the command data 370. The command data 370 is sent to the command processing unit 211. The command processing unit 211 designates a file used by the user of the apparatus 200 indicated by the command data 370, and stores the designated file in the data management storage unit 204 (see the above-mentioned << file designation process >>). For the file, the “management information generation process” << the file encryption process >> << the use data transfer process >> of the above-mentioned “in the case where the use data is transferred from the apparatus 200 to the apparatus 100” is executed. That is, the apparatus 200 transmits a data file or a part of the data file to the apparatus 100, and the apparatus 100 stores the data file or a part of the data file received from the apparatus 200 in the storage unit of the apparatus 100. . As a result, the user can use the apparatus 100 to obtain necessary files stored in the apparatus 200 from a remote location.

<E-mail order>
Next, an e-mail obtaining process will be described. The mail processing unit 212 of the device 200 stores e-mails (data files) transmitted / received by the device 200 and management information (header information, etc.) thereof. A set of electronic mail and its management information is called mail data. The device 100 can obtain an electronic mail from the device 200. The ordering of e-mail consists of << remote e-mail search process >> and << e-mail obtainment process >>.

≪Remote email search process≫
The UI processing unit 101 of the apparatus 100 can display a mail acquisition condition setting screen 600 for inputting search conditions for electronic mail to be acquired. For example, the e-mail retrieval condition setting screen 600 illustrated in FIG. 8B is used to input conditions for inputting e-mail retrieval conditions (subject, storage location, sender, destination / Cc, received date / time, presence / absence of attached file) to be retrieved from the apparatus 200. It has a column 601, a mail search button 602 for instructing mail search, and a cancel button 603. This search condition may be a search target for all electronic mails stored in the apparatus 200, or may be a search target for only a part thereof. The user can input this search condition to the UI processing unit 101 of the apparatus 100, and can further input an instruction to press the mail search button 602 or the cancel button 603. When the search condition is input and an instruction to push down the mail search button 602 (instruction by the user) is input, the command generation unit 102 includes an instruction to search the apparatus 200 for an email that matches the search condition. Command data 340 that is a file is generated. For example, the command data 340 illustrated in FIG. 3D includes a command type (mail search) and a mail search condition described by, for example, an SQL sentence. Here, the “instruction by the user” is “an instruction on a file operation for the data file stored in the apparatus 200”, and “a data file stored in the apparatus 200 or a part of the data file is transferred to the apparatus 200”. "Instruction to copy to 100". The command data 340 is stored in the data management storage unit 104. Thereafter, using the command data 340 as a “file”, the “management information generation process” << the file encryption process >><< the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 340 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 340” corresponds to “a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is directed”. That is, the apparatus 100 outputs a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is, and the apparatus 200 receives the command data file. .

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 340 and decrypts it to obtain the command data 340. The command data 340 is sent to the command processing unit 211. Then, the command processing unit 211 instructs the search unit 210 to perform a mail search with the search condition indicated by the command data 340. The search unit 210 searches the mail data stored in the mail processing unit 212 according to the search condition indicated by the command data 340 (for example, the search condition described by the SQL sentence), and includes the mail data corresponding to the search condition. Output the result.

  The search result is sent to the command generation unit 202, and the command generation unit 202 generates command data 360 that is a file including the search result. For example, the command data 360 illustrated in FIG. 5A is information included in the command type (mail search result), the number of search emails that is the number of emails that match the search conditions, and the management information of the mail data that matches the search conditions. Contains certain search email information (email number, subject, size, received date, storage location, presence of attached file). Command data 360 is stored in the data management storage unit 204. Thereafter, using the command data 360 as a “file”, the “management information generation process” << the file encryption process >> << the usage data transfer process >> of “when the usage data is transferred from the apparatus 200 to the apparatus 100” described above is executed. . As a result, the encrypted command data 360 and its management information are output from the device 200 and transferred to the device 100 via the relay device 250.

  The decryption unit 109 of the apparatus 100 receives the encrypted command data 360 and decrypts it to obtain the command data 360. The command data 360 is stored in the data management storage unit 104 and is sent to the command processing unit 111. The command processing unit 111 uses the command data 360 to generate information for displaying the mail search result list screen 620 and sends the information to the UI processing unit 101. Based on this, the UI processing unit 101 displays a mail search result list screen 620. For example, the mail search result list screen 620 illustrated in FIG. 10 includes a search result list 621 indicating search mail information (mail subject, size, received date / time, presence / absence of attached file, storage location), a mail acquisition button 622, and a cancel button. 623.

≪E-mail order processing≫
As described above, the UI search unit 101 displays the mail search result list screen 620. Even after the display of the mail search result list screen 620 is completed, the UI processing unit 101 displays the management file list screen 400 and instructs to push down the “mail search result” displayed in the data list 401 (user Is input to the UI processing unit 101, the mail search result list screen 620 is displayed again. The user selects one or more pieces of mail data from the search result list 621 on the displayed mail search result list screen 620, inputs information for designating the selected mail data to the UI processing unit 101, and further sends a mail. An instruction to press the order button 622 can be input. Thereby, the command generation unit 102 generates command data 380 for instructing transfer of the selected mail data. For example, the command data 380 illustrated in FIG. 5B includes a command type (mail acquisition), a target mail number that is the number of mails to be acquired, and a target mail (mail number, storage location) that is information indicating the mail to be acquired. . The command data 380 is stored in the data management storage unit 104. Thereafter, using the command data 380 as a “file”, the “management information generation process” << the file encryption process >><< the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 380 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 380” corresponds to “a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is directed”. That is, the apparatus 100 outputs a command data file that is a file including information that can identify an instruction for file operation and to which data file the instruction is, and the apparatus 200 receives the command data file. .

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 380 and decrypts it to obtain the command data 380. Command data 380 is sent to the command processing unit 211. The command processing unit 211 designates an electronic mail indicated by the command data 380, and stores the designated electronic mail as a file in the data management storage unit 204 (see the above-mentioned << file designation processing >>). This e-mail is treated as a “file”, and the “management information generation process” << the file encryption process >> << the use data transfer process >> of “when the usage data is transferred from the apparatus 200 to the apparatus 100” described above is executed. That is, the apparatus 200 transmits a data file or a part of the data file to the apparatus 100, and the apparatus 100 stores the data file or a part of the data file received from the apparatus 200 in the storage unit of the apparatus 100. . As a result, the user can use the apparatus 100 to remotely obtain necessary electronic mail stored in the apparatus 200.

<Sending email by remote control>
Next, e-mail transmission processing by remote control will be described.
The device 100 can cause the device 200 to send an e-mail by remote control. When the management file list screen 400 is displayed on the UI processing unit 101 of the apparatus 100 and an instruction to push down the mail transmission button 410 is input to the UI processing unit 101, the UI processing unit 101 is used to input the contents of the e-mail. The outgoing mail input screen 640 is displayed. For example, the transmission mail input screen 640 illustrated in FIG. 11 includes an input field 641 for inputting an e-mail destination, subject, text, attached file, and the like, a mail transmission button 642, and a cancel button 643. A user inputs an e-mail destination, subject, text, attached file, and the like to the UI processing unit 101, and an instruction to push down a mail transmission button 642 (an instruction by the user, that is, an instruction to send an e-mail) is UI processing. When input to the unit 101, the command generation unit 102 generates command data 385, which is a file including an instruction for causing the apparatus 200 to transmit an email corresponding to the information input on the outgoing mail input screen 640. . For example, the command data 385 illustrated in FIG. 6A includes a command type (mail transmission), destination information (destination, Cc, Bcc), a subject, a text, an attached file, and the like. The command data 385 is stored in the data management storage unit 104. Thereafter, using the command data 385 as a “file”, the “management information generation process” << the file encryption process >><< the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 385 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 385” corresponds to “a command data file that is a file including information that can identify an instruction”. That is, the device 100 outputs a command data file that is a file including information that can identify an instruction, and the device 200 receives the command data file.

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 385 and decrypts it to obtain command data 385. The command data 385 is sent to the command processing unit 211. The command processing unit 211 gives an instruction to the mail processing unit 212, and the mail processing unit 212 generates and transmits an e-mail indicated by the command data 385.

<Setting or changing file attributes>
Next, file attribute setting or changing processing will be described.
A management file list screen 400 is displayed on the UI processing unit 101 of the apparatus 100, and the user selects one or more usage data from the data list 401, and information for designating the selected usage data is stored in the UI processing unit 101. When the user further inputs an instruction to push down the attribute change button 411 to the UI processing unit 101, the UI processing unit 101 sets a file attribute for setting or changing the attribute described in the management information 300 of the selected usage data. A screen 700 is displayed. The attributes to be set or changed are attribute information (1) and (2) of the management information 300 illustrated in FIG. For example, the file attribute setting screen 700 illustrated in FIG. 12 includes a setting field 701 for setting or changing attribute information (1) and (2) of the management information 300, an attribute setting button 702, and a cancel button 703. The user inputs attribute setting content (whether read-only or whether to save the update history) to the UI processing unit 101 for each selected usage data, and an attribute setting button 702. Can be input to the UI processing unit 101. Then, in response to an instruction from the UI processing unit 101, the data management storage unit 104 sets the attributes of the selected usage data management information 300 (such as “attribute information (1) (2)”) and the setting contents of the input attribute. Set or change according to.

  Further, the command generation unit 102 generates command data 390 that is a file including an instruction to set or change the attribute of the management information 300 of the selected usage data according to the setting contents of the input attribute. . For example, the command data 390 illustrated in FIG. 6B includes a command type (file attribute setting or change), attribute information (1), attribute information (2), and a target file ID that is the number of files of the file ID to be set or changed. And the target file ID that is the file ID of the file to be set or changed. Command data 390 is stored in the data management storage unit 104. Thereafter, using the command data 390 as a “file”, the “management information generation process” << the file encryption process >> << the usage data transfer process >> of “when the usage data is transferred from the apparatus 100 to the apparatus 200” described above is executed. . As a result, the encrypted command data 390 and its management information are output from the device 100 and transferred to the device 200 via the relay device 250. Here, “encrypted command data 390” corresponds to “command data file that is a file including information that can identify an instruction”. That is, the device 100 outputs a command data file that is a file including information that can identify an instruction, and the device 200 receives the command data file.

  The decryption unit 209 of the apparatus 200 receives the encrypted command data 390 and decrypts it to obtain the command data 390. Command data 390 is sent to the command processing unit 211. The command processing unit 211 sets the attributes (such as “attribute information (1) (2)”) of the usage data management information 300 indicated by the command data 390 out of the usage data stored in the data management storage unit 204. The management information 300 is updated by setting or changing according to the command data 390 (that is, the instruction is executed according to the information included in the command data file that can identify the instruction).

  When there are a plurality of devices 100, as with the device 200, the other devices 100 receive the encrypted command data 390 and its management information, decrypt the encrypted command data 390, and execute the command data. 390 may be obtained, and the attribute of the usage data management information 300 indicated by the command data 390 may be set or changed according to the command data 390. Further, the apparatus 200 may execute the process of the apparatus 100, and the apparatus 100 may execute the process of the apparatus 200. In addition, a device other than the devices 100 and 200 receives the encrypted command data 390 and its management information, decrypts the encrypted command data 390 to obtain the command data 390, and uses the command data 390. The attribute of the data management information 300 may be set or changed according to the command data 390. The attribute to be set or changed may be the above-mentioned remaining time (expiration date) of the file. The attribute setting or changing process in this case is the above-described process of setting or changing the remaining time (setting or changing the expiration date).

<Features>
By using the above-described method, the information stored in the device 200 such as a company / home PC is encrypted all along the route and transferred to the device 100 such as a remote terminal device. Therefore, information can be taken out safely.

  The information taken out is automatically deleted from both the device 100 and the relay device 250 after the set expiration date has passed, so that information leakage due to forgetting to erase can be prevented.

  In the above-described method, even if the device 200 such as a company / home PC is not operated and taken out before going out, the information stored in the device 200 such as a file or e-mail can be obtained as soon as necessary. Can be ordered remotely.

  In the above-described method, all information including a command data file for remote operation is transmitted and received as a file. Therefore, it is not necessary that the device 100 such as a remote terminal device that uses information and the device 200 such as a company / home PC is always connected by communication, and communication is connected only when information is transferred. Just do it.

  In addition, even if communication is interrupted during information transfer, it waits for information transfer until communication is reconnected, so even when the communication status is interrupted or connected, such as when moving on the Shinkansen, Operations and information can be sent and received. In addition, since information such as files and e-mails transferred to the device 100 is stored in an encrypted state, information such as files and e-mails can be viewed and edited even when communication is disconnected. can do.

  In the above-described method, a command data file for remote operation is also stored and transferred by the same mechanism as other files transferred between devices. For this reason, even if the application is not started or the power is not turned on at the transfer destination device, the command data file is stored as a file in the transfer source device or relay device, and the application of the transfer destination device At the stage of startup, the command is executed in the transfer destination device. For this reason, the remote operation can be surely executed regardless of the power state of the apparatus or the startup state of the application.

  In the above-described method, an electronic mail is created by a device 100 such as a remote terminal device, and the electronic mail is transmitted from a device 200 such as a company PC using a company mail address used in normal business. I can. For this reason, it can be used when it is desired to send a closed e-mail safely in the company or when it is desired to send the e-mail with a company mail address.

  Only data is written in the command data file, and the command data file itself is not a file that can be executed without an application. For this reason, even if the encryption of the command data file is released, the command data file itself is not an executable file, and thus does not adversely affect the operation of the terminal device.

<Modifications>
In addition, this invention is not limited to the above-mentioned embodiment. For example, in the above-described embodiment, an example in which the device 100 and the device 200 perform communication via the relay device 250 has been described. However, the apparatus 100 and the apparatus 200 may perform so-called peer-to-peer communication without using the relay apparatus 250. In this case, the relay device 250 is not necessary. Alternatively, the device 100 and the device 200 may perform communication via a plurality of relay devices 250.

  In the above embodiment, an example in which an encrypted file is transferred between devices has been described. However, an unencrypted file may be transferred between devices. For example, in the above embodiment, encrypted command data is a command data file, but unencrypted command data may be a command data file. In the above embodiment, an encrypted file is a data file, but an unencrypted file may be a data file. Also, the management information may be encrypted and transferred between devices.

  Further, only a part of the processing described above may be executed. The various processes described above are not only executed in time series according to the description, but may also be executed in parallel or individually as required by the processing capability of the apparatus that executes the processes. Needless to say, other modifications are possible without departing from the spirit of the present invention.

  When the above configuration is realized by a computer, the processing contents of the functions that each device should have are described by a program. By executing this program on a computer, the above processing functions are realized on the computer. The program describing the processing contents can be recorded on a computer-readable recording medium. An example of a computer-readable recording medium is a non-transitory recording medium. Examples of such a recording medium are a magnetic recording device, an optical disk, a magneto-optical recording medium, a semiconductor memory, and the like.

  This program is distributed, for example, by selling, transferring, or lending a portable recording medium such as a DVD or CD-ROM in which the program is recorded. Furthermore, the program may be distributed by storing the program in a storage device of the server computer and transferring the program from the server computer to another computer via a network.

  A computer that executes such a program first stores, for example, a program recorded on a portable recording medium or a program transferred from a server computer in its own storage device. When executing the process, this computer reads a program stored in its own recording device and executes a process according to the read program. As another execution form of the program, the computer may read the program directly from the portable recording medium and execute processing according to the program, and each time the program is transferred from the server computer to the computer. The processing according to the received program may be executed sequentially.

  In addition, each of the devices 100 and 200 and the relay device 250 may be a dedicated device that performs the above processing.

100,200 devices

Claims (8)

A data file management method for managing data files by a plurality of devices connected via a network,
A first device that is one of the plurality of devices is instructed by a user to perform a file operation on a data file stored in a second device that is not the first device of the plurality of devices. An instruction input step for accepting
A command data file output step in which the first device outputs a command data file that is a file including information that can identify an instruction for the file operation and a data file to which the instruction is;
A command data file input step in which the second device receives the command data file;
The second device is the target of the instruction according to the information included in the command data file that can identify an instruction for file operation and which data file the instruction is for. A command processing step for executing the instruction on the data file stored in the storage unit of the apparatus;
File management method including. The instruction is an instruction to copy a data file stored in the second device or a part of the data file to the first device,
The command processing step performed by the second device includes:
Transmitting the data file or a portion of the data file to the first device;
The first device further includes a storing step of storing a data file or a part of the data file received from the second device in a storage unit of the first device.
The file management method according to claim 1, wherein: The instruction is an instruction to delete a data file or a part of the data file stored in the second device,
The command processing step performed by the second device includes:
2. The file according to claim 1, further comprising a sub-step of performing a process of adding a change indicating that the data file or a part of the data file has been deleted to the management file in the second apparatus. Management method. The instruction is an instruction to delete a data file or a part of the data file stored in the second device,
The command processing step performed by the second device includes:
The file management method according to claim 1, further comprising a sub-step of deleting the data file or a part of the data file. A data file management system for managing data files with a plurality of devices connected via a network,
A first device that is one of the plurality of devices is instructed by a user to perform a file operation on a data file stored in a second device that is not the first device of the plurality of devices. And outputs a command data file that is a file containing information that can identify an instruction for the file operation and which data file the instruction is for,
The second device receives the command data file, and according to the information included in the command data file that can identify an instruction for file operation and to which data file the instruction is directed. Executing the instruction on the data file stored in the storage unit of the target second device;
A file management system characterized by that. An input unit that accepts an instruction from a user regarding a file operation on a data file stored in another device;
And an output unit that outputs a command data file that is a file including information that can identify an instruction for the file operation and to which data file the instruction is directed. An input unit for receiving a command data file;
According to the information included in the command data file for identifying the file operation and to which data file the instruction is directed, the data file stored in the storage unit that is the target of the instruction A command processing unit for executing the instruction.   A program for causing a computer to function as at least one of the devices according to claim 6.

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