JP2010266933A - Document management program, document management system, and document management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a document file from being lost or leaked. <P>SOLUTION: In an on-line storage system in which an on-line storage server 3 and a client computer 2 are connected trough a network 4, an entity of a document file created/updated by a client computer 2 is always managed at an on-line storage server 3 side except when the file is opened by an application. Also, when a document file is uploaded or downloaded, it is possible to achieve seamless operation of a local storage and an on-line storage without any special operation by a user. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a document management program, a document management system, and a document management method that can prevent a document file from being lost or leaked.

  In recent years, there has been a demand for an improved security level for document files handled by companies and the like. For example, the loss or leakage of a document file due to the loss or theft of a mobile device has become a major social problem. In particular, in companies that handle a large amount of personal information, complete countermeasures are taken for the loss or leakage of a document file. Is required to take.

  Known systems that can prevent the loss or leakage of document files include an online backup system, a thin client system (see, for example, Patent Document 1), an online storage system (file server system), and the like. For example, the introduction of an online backup system, thin client system, and online storage system is effective for the loss of document files, and the introduction of a thin client system and online storage system is effective for the leakage of document files. Has been. The outline of each system will be described below.

  An online backup system is a system that backs up files in a storage area of a client computer to a storage area of a backup server connected via a network. A backup program that realizes such a system can normally set a backup start date and time arbitrarily, and performs backup at a predetermined time (for example, every hour) or a predetermined time (for example, 17:00 every day). Can be backed up.

  The thin client system includes a client computer that does not include a hard disk and includes only a memory, and a thin client server to which a plurality of client computers are connected via a network. Work is performed using an application on the thin client server, and files created and updated thereby are also stored on the thin client server. Therefore, in this system, even if the client computer is lost or stolen, it can be said that the risk of document file leakage is extremely low.

  The online storage system includes a client computer and an online storage server to which a plurality of client computers are connected via a network, and a user of the client computer performs an operation using an application on the client computer. At the same time, the document file created / updated thereby is stored on the online storage server. Therefore, in this system, if the operation rule of storing important document files on the online storage server and not storing them on the client computer is observed, there is a risk of document file leakage even if the client computer is lost or stolen. It can be said that it is low.

JP 2003-323402 A

  However, the conventional online backup system is only for multiplexing the file storage destination for the purpose of preventing the loss of the file, so it can prevent the loss of the document file due to the loss or theft of the client computer, but it is saved on the client computer It was difficult to prevent leakage of document files.

  On the other hand, the thin client system is excellent in security related to the leakage of document files. However, since it is necessary to introduce special hardware and operating system when constructing the system, the introduction cost is inevitably high. In a situation where there are many simultaneous connections of computers, there is a problem that user stress due to server congestion is large.

  In that regard, an online storage system can be constructed simply by introducing an inexpensive server. However, the user needs to save the document file to the online storage server manually. There is a problem that it takes time to specify the user name and the burden on the user increases. In addition, the operation rule that important document files are stored on the online storage server and not stored on the client computer is based on the premise that all users will follow. Files may be lost or leaked.

The present invention was created in order to solve these problems in view of the above circumstances. The document management program of the present invention includes a server program for operating an online storage server, and a network. A client program for operating a client computer connected to the online storage server, wherein the server program receives a document file from the client computer and stores the received document file in the online storage; In response to a request from the client computer, the online storage server operates as a file transmission means for transmitting the corresponding document file on the online storage to the client computer. The client program includes a file creation / update detection means for detecting creation and update of a document file in a local storage provided in the client computer, and an online storage of the document file when the creation / update of the document file is detected. Automatic upload means for automatically uploading to the server, automatic creation / update file deleting means for automatically deleting the entity of the document file that has been uploaded to the online storage server, and the entity online The online operation detection means for detecting the open operation of the document file on the storage server and the actual document file with the open operation are online. An automatic download unit for automatically downloaded from the storage server, the document file downloaded, and wherein the operating the client computer as a file delivery means to be passed to the application associated with the document file.
In addition, when the client program automatically deletes the substance of the document file that has been uploaded to the online storage server from the local storage of the client computer, the program for the client stores the corresponding document on the online storage server. The client computer is operated as a shortcut creation means for creating a shortcut linked to a file.
Further, the open operation detecting means detects an open operation of a document file whose entity is on the online storage server based on the open operation of the shortcut.
The client program compares the shortcut list created on the client computer with the document file list on the online storage server, and synchronizes the shortcut with the document file on the online storage server. The client computer is operated as a means.
Further, the client program includes: a trash can movement request transmission unit that transmits a trash can move request to an online storage server when the shortcut is moved to a trash folder on the client computer; and When the shortcut is returned to the original position, the client computer is operated as a file restoration request means for sending a file restoration request to the online storage server, and the server program receives a trash can move request from the client computer. Recycle bin moving means to move the corresponding document file on the online storage server to the recycle bin folder on the online storage server, and the file from the client computer When receiving the original request, and wherein the operating the online storage server as a file restoration means for restoring the corresponding document file in the trash folder for online storage server to its original position.
The client program includes a trash file list request means for sending a trash file list request to the online storage server, and a trash file list display means for displaying the trash file list data when the trash file list data is received from the online storage server. In response to the document file restore operation on the recycle bin file list display screen, the file restore request means for sending a file restore request to the online storage server, and the shortcut corresponding to the restored document file are restored to the original on the client computer. When the client computer is operated as a shortcut restoring means for restoring to a location, and the server program receives a trash file list request from the client computer, The recycle bin file list sending means for sending the list data of the document files in the recycle bin folder on the online storage server to the client computer, and the corresponding documents in the recycle bin folder on the online storage server when a file restore request is received from the client computer The online storage server is operated as a file restoring means for restoring the file to the original position.
The automatic uploading means encrypts the document file and uploads it to the online storage server, and the file receiving means stores the document file received from the client computer in the online storage in an encrypted state, and The file transmission means transmits the document file on the online storage to the client computer in an encrypted state, and the automatic download means decrypts the encrypted document file downloaded from the online storage server. Features.
Further, the file receiving means stores the document file to be overwritten for a predetermined number of generations.
The client program causes the client computer to operate as an authentication information input request unit that requests input of an ID and a password, and an authentication information transmission unit that transmits the input ID and password to an online storage server. When receiving the ID and password from the client computer, the program stores the received ID and password in advance, and the received ID and password are stored in advance. As an authentication result response means for transmitting a response indicating successful authentication to the client computer when the ID and password match, and transmitting a response indicating failure to authenticate to the client computer when the ID and password do not match. Online storage Characterized in that to operate the Jisaba.
The document management system of the present invention includes an online storage server and a client computer connected to the online storage server via a network. The online storage server receives a document file from the client computer and receives the received document. File receiving means for storing the file in the online storage, and file sending means for sending the corresponding document file on the online storage to the client computer in response to a request from the client computer, the client computer being provided in the client computer File creation / update detection means for detecting document file creation and update in local storage, and document When a file creation / update is detected, the automatic uploading means for automatically uploading the document file to the online storage server and the substance of the document file that has been uploaded to the online storage server from the local storage of the client computer Automatic creation / update file deletion means that automatically deletes, open operation detection means that detects the opening operation of a document file whose entity is on the online storage server, and the entity of the document file that has been opened from the online storage server An automatic download means for automatically downloading, and a file for transferring the downloaded document file to the application associated with the document file. Characterized in that it comprises a delivery unit.
The document management method of the present invention uses an online storage server and a client computer connected to the online storage server via a network, receives a document file from the client computer to the online storage server, and receives the received document. A file reception procedure for storing a file in the online storage and a file transmission procedure for transmitting the document file on the online storage to the client computer in response to a request from the client computer are executed. The client computer includes the client computer. File creation / update detection procedures for detecting creation and update of document files in local storage, and document files Automatically upload the document file to the online storage server when the creation / update of the file is detected, and the entity of the document file that has been uploaded to the online storage server from the local storage of the client computer. Automatic creation / update file deletion procedure to delete automatically, open operation detection procedure to detect the open operation of the document file whose entity is on the online storage server, and the entity of the document file that had the open operation from the online storage server Automatic download procedure that automatically downloads and the file that delivers the downloaded document file to the application associated with the document file Characterized in that to execute a pass procedure can.

According to the first aspect of the present invention, the document file created / updated by the client computer is stored in the online storage system in which the online storage server and the client computer are connected via the network. It can always be managed on the online storage server side. Moreover, since no special operation is required from the user when uploading or downloading the document file, not only can the user's operation be reduced, but the local storage and online storage can be operated seamlessly.
According to the second aspect of the present invention, the document file on the online storage server can be easily accessed, so that the document file can be re-edited without increasing the operation burden on the user.
According to the invention of claim 3, the document file on the online storage server can be opened by the same operation as that for opening the document file on the client computer.
According to the invention of claim 4, when a document file on the online storage server is shared among a plurality of client computers, the document file is created or updated by one client computer by synchronizing shortcuts in the plurality of client computers. Can be reflected in other client computers.
According to the invention of claim 5, the trash box movement and restoration of the corresponding document file on the online storage server are automatically performed in conjunction with the shortcut trash box movement operation (deletion operation) and the restoration operation on the client computer. be able to.
According to the invention of claim 6, even if the shortcut is completely deleted on the client computer, the shortcut and the corresponding document file can be restored.
According to the seventh aspect of the present invention, it is possible to prevent eavesdropping of the document file in the network path, and even if the document file is leaked from the online storage, it is difficult to decipher it.
According to the invention of claim 8, even if the document file is overwritten by mistake, the document file before being overwritten can be restored.
According to the ninth aspect of the present invention, unauthorized access to the online storage server can be restricted and document file leakage can be prevented.
According to the invention of claim 10, the present invention can be realized as a system.
According to the invention of claim 11, the present invention can be realized as a method.

It is a block diagram which shows the structure of a document management system. It is explanatory drawing at the time of automatic upload. It is a flowchart which shows the operation | movement procedure at the time of automatic upload. It is explanatory drawing which shows the shortcut creation process at the time of automatic upload. It is explanatory drawing which shows the process at the time of opening operation of a shortcut. It is explanatory drawing which shows the process at the time of shortcut copy operation and deletion operation. It is explanatory drawing which shows the outline of a shortcut synchronization process. It is explanatory drawing which shows the detail of a shortcut synchronization process. It is explanatory drawing of a deletion / restoration process. It is explanatory drawing of a generation progress process. It is a flowchart which shows the process sequence of a monitoring agent. It is a flowchart which shows the process sequence of online document operation software. It is a flowchart which shows the process sequence of a shortcut synchronization process. It is a flowchart which shows the process sequence of a document deletion process. It is a flowchart which shows the process sequence of a document restoration process. It is a flowchart which shows the process sequence of net trash box browsing software. It is a flowchart which shows the process sequence by the side of the online storage which concerns on a trash box. It is a flowchart which shows the process sequence of a document transmission process. It is a flowchart which shows the process sequence of a document reception process. It is a flowchart which shows the process sequence of a generation progress process. It is a flowchart which shows the process sequence of an authentication process. It is a flowchart which shows the authentication processing procedure on the server side. It is a ladder diagram showing the operation procedure of the document management system related to the monitoring agent. It is a ladder diagram showing the operation procedure of the document management system according to the online document operation software. It is a ladder diagram which shows the operation | movement procedure of the document management system which concerns on a trash box.

[Document Management System]
Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a document management system to which a document management program of the present invention is applied. The document management system 1 includes a client computer 2, an online storage server 3, and the Internet for connecting these to be communicable. Network 4.

  The client computer 2 is a computer in which the document management program (client program) of the present invention is installed, and is composed of, for example, a notebook PC, a desktop PC, a mobile phone, a PDA, or the like. When the client program is executed on the client computer 2, the document file created / updated in the local storage of the client computer 2 is automatically uploaded to the online storage server 3 via the network 4 and brought online. It becomes possible.

  The online storage server 3 is a computer in which the document management program (server program) of the present invention is installed, and is configured by, for example, a server computer installed in a data center. When the server program is executed on the online storage server 3, the document file transferred from the client computer 2 can be received, and the received document file can be stored in the online storage as an online document.

[Document Management Program]
The document management program of the present invention includes a client program executed on the client computer 2 and a server program executed on the online storage server 3 connected to the client computer 2 via the network 4. These cooperations realize a function for automatically bringing a document file on the local storage online.

  In order to realize the above function, the server program receives a document file from the client computer 2 and stores the received document file in an online storage. The online storage server 3 is configured to operate as a file transmission unit that transmits the document file on the storage to the client computer 2.

  The client program also includes a file creation / update detection means for detecting creation and update of a document file in the local storage provided in the client computer 2, and an online storage of the document file when the creation / update of the document file is detected. Automatic upload means for automatically uploading to the server 3; creation / update file automatic deletion means for automatically deleting the substance of the document file that has been uploaded to the online storage server 3 from the local storage of the client computer 2; An open operation detecting means for detecting an open operation of a document file whose entity is on the online storage server 3 and an entity of the document file having the open operation are opened. An automatic download unit for automatically downloaded from the line storage server 3, the document file downloaded, configured to operate the client computer 2 as a file delivery means to be passed to the application associated with the document file.

  In this way, the document file created / updated by the client computer 2 can be stored in the online storage system in which the online storage server 3 and the client computer 2 are connected via the network 4 when the file is opened by the application. Except for this, it can always be managed on the online storage server 3 side. Moreover, since no special operation is required from the user when uploading or downloading the document file, not only can the user's operation be reduced, but the local storage and online storage can be operated seamlessly.

  The file creation / update detection means can detect the creation and update of a document file based on, for example, file management information provided by an OS (operation system) file management system. Here, the file creation / update detection means may detect the creation and update of the document file in a preset monitoring target folder in the local storage, or may be set according to a preset file type (for example, depending on the extension). The creation and update of a document file that conforms to (setting) may be detected.

  The automatic creation / update file deletion means compares the document file on the local storage with the document file on the online storage when the creation / update file that has been uploaded to the online storage server 3 is deleted from the client computer 2. It is preferable to delete the file after confirming that both are the same file. For example, as shown in FIGS. 2 and 3, when the creation / update of the document file in the client computer 2 is detected (S1), the creation / update file is transferred to the online storage server 3 in real time (S2). While storing in the online storage of the server 3 (S3) and comparing the files of the client computer 2 side and the online storage server 3 side (S4) and confirming that both are the same file (S5), the client computer 2 side The created / updated file is deleted (S6).

  In addition, the client program automatically deletes the actual document file that has been uploaded to the online storage server 3 from the local storage of the client computer 2 on the client computer 2 on the online storage server 3. The client computer 2 is preferably operated as a shortcut creation means for creating a shortcut linked to a corresponding document file. For example, as shown in FIG. 4, when a document file (sample.doc) is created by an application, the entity file 5 is uploaded in real time to the online storage server 3, and the entity document file 5 is stored on the client computer 2. The linked shortcut 6 is left. In this way, access to the document file on the online storage server 3 is facilitated, and the document file can be re-edited without increasing the operation burden on the user. Note that aliases and symbolic links are known as other names of shortcuts linked to the entity file. In this specification, these are also referred to as shortcuts.

  The open operation detecting means can detect the open operation of the document file whose entity is on the online storage server 3 based on the open operation of the shortcut. For example, as shown in FIG. 5, when the shortcut 6 of the entity file 5 created by word processing software (application) is activated (double-click operation), the document file (on the online storage server 3 linked to the shortcut 6) ( The entity file 5) is automatically downloaded, and the word processor software associated with the shortcut 6 is activated, and the entity file 5 is opened on the word processor software. In this way, it becomes possible to open the document file on the online storage server 3 by the same operation as when opening the document file on the client computer 2. As shown in FIG. 6, when the shortcut 6 is copied (copied), a copy request can be transmitted to the online storage server 3 to create a copy of the corresponding document file on the online storage.

  The client program compares the shortcut list created on the client computer 2 with the list of document files on the online storage server 3 and synchronizes the shortcut with the document file on the online storage server 3. It is preferable to operate the client computer 2 as a means. In this way, as shown in FIGS. 7 and 8, when a document file on the online storage server 3 is shared among a plurality of client computers 2, one client is synchronized with the shortcuts in the plurality of client computers 2. The creation and update of the document file by the computer 2 can be reflected on other client computers 2.

  Further, the client program is in a trash box move request transmitting means for sending a trash box move request to the online storage server 3 when the shortcut is moved to the trash folder on the client computer 2 and in the trash box folder on the client computer 2. When the shortcut is returned to the original position, the client computer is operated as a file restoration request means for sending a file restoration request to the online storage server 3, and the server program receives the recycle bin movement request from the client computer 2. In addition, the corresponding document file on the online storage server 3 is moved to the trash box folder on the online storage server 3, and the file from the client computer 2. When receiving the original request, operating the online storage server as a file restoration means for restoring the corresponding document file in the trash folder for online storage server 3 to the original position is preferred.

  In this way, as shown in FIG. 9, in conjunction with the shortcut trash box move operation (delete operation) and restore operation on the client computer 2, the trash box move and restore of the corresponding document file on the online storage server 3 is automatically performed. Can be done automatically. In order to distinguish between the trash folder of the client computer 2 and the trash folder of the online storage server 3, the trash folder of the client computer 2 is simply referred to as “trash box” and the trash folder of the online storage server 3 is referred to as necessary. It is called “Net Recycle Bin”.

  The client program also sends a trash file list request means for sending a trash file list request to the online storage server 3 and a trash file list display means for displaying the trash file list data from the online storage server 3 when it is received. On the client computer 2, a file restoration request means for sending a file restoration request to the online storage server 3 in response to a document file restoration operation on the trash box file list display screen, and a shortcut corresponding to the restored document file are displayed on the client computer 2. When the client computer 2 is operated as a shortcut restoring means for restoring to the original location of the client, and the server program receives a trash file list request from the client computer 2 The trash box file list transmitting means for transmitting the list data of the document files in the trash folder on the online storage server 3 to the client computer 2 and the trash box on the online storage server 3 when the file restoration request is received from the client computer 2 It is preferable to operate the online storage server 3 as file restoring means for restoring the corresponding document file in the folder to the original position. In this way, even if the shortcut is completely deleted on the client computer 2, the shortcut and the corresponding document file can be restored.

  The automatic uploading means encrypts the document file and uploads it to the online storage server 3, and the file receiving means stores the document file received from the client computer 2 in the online storage in an encrypted state. The file transmission means transmits the document file on the online storage 3 to the client computer 2 in an encrypted state, and the automatic download means transmits the encrypted document file downloaded from the online storage server 3. Decoding is preferred. In this way, eavesdropping of the document file on the network path can be prevented, and even if the document file leaks from the online storage, it can be difficult to decipher it.

  The file receiving means preferably stores the document file to be overwritten for a predetermined number of generations. For example, as shown in FIG. 10, the data is stored for three generations including the current generation. In this way, even if the document file is accidentally overwritten, the document file before being overwritten can be restored.

  The client program operates the client computer 2 as authentication information input request means for requesting input of an ID and password, and authentication information transmission means for transmitting the input ID and password to the online storage server 3, and When receiving the ID and password from the client computer 2, the program stores the received ID and password against the ID and password stored in advance, and the received ID and password are stored in advance. The authentication result is transmitted to the client computer 2 when the ID and the password are matched, and is transmitted to the client computer 2 when the ID and password are not matched. Online response as a response means It is preferred to operate the Jisaba 3. In this way, unauthorized access to the online storage server 3 can be restricted and document file leakage can be prevented.

[Processing procedure of document management program]
Next, a specific processing procedure of the document management program according to the present invention will be described with reference to FIGS.

  As shown in FIG. 11, the monitoring agent included in the client program first performs authentication processing (S11) and shortcut processing (S12), which will be described later, and then confirms that detection is not stopped (S13). Create document file in local storage (S14: file creation / update detection means), rename shortcut (S15), duplicate shortcut (S16), delete shortcut (S17), restore shortcut (S18), program termination A request (S19) is detected.

  If it is determined that the document file has been created, the created document file is automatically uploaded to the online storage server 3 by a document transmission process (S20: automatic uploading means) described later, and the uploaded document is completed. The file is deleted from the local storage (S21: creation / update file automatic deletion means), and a shortcut linked to the upload destination entity document file (hereinafter referred to as online document) is created on the local storage (S22: shortcut). Creating means).

If it is determined that the name of the shortcut has been changed, the name of the online document in the online storage is changed (S23) and the name of the generation file is changed (S24).
If it is determined that the shortcut has been duplicated, the online document in the online storage is duplicated (S25), and the link destination (reference destination) of the duplicated shortcut is changed to the duplicated online document (S26).
If it is determined that the shortcut has been deleted, a document deletion process (S27) described later is executed. If it is determined that the shortcut has been recovered, a document recovery process (S28) described later is executed.
If it is determined that there is a program termination request, the monitoring agent is terminated.

  As shown in FIG. 12, the online document operation software included in the client program is a program (open operation detecting means) that is activated in response to a shortcut open operation. When activated, the authentication process (S31) is first performed. , The online document corresponding to the opened shortcut is automatically downloaded from the online storage server 3 to the temporary data area of the local storage by a document reception process (S32: automatic download means) described later, The downloaded document file is delivered to the application associated with the document file (S33: file delivery means). Thereafter, it is determined whether or not the application is terminated (S34). If the determination result is YES, it is determined whether or not the document file has been updated (S35). If the determination result is YES, document transmission processing described later is performed. In (S36), the updated document file is automatically uploaded to the online storage server 3, and the update date and time of the shortcut linked to the uploaded document file is changed (S37). After deleting the document file (S38), the online document operation software is terminated.

  As shown in FIG. 13, in the shortcut synchronization process (shortcut synchronization means) included in the client program, first, it is determined whether or not it is a synchronization process start time (S41). If the determination result is YES, A list of shortcuts in the client computer 2 is created (S42), and a list of online documents on the online storage server 3 is created (S43). Then, in the iteration loop (S44 to S49), the shortcuts are listed from the list and compared with the online document. If it is determined that there is no online document corresponding to the shortcut (S45), the shortcut is deleted (S46), while if it is determined that there is an online document corresponding to the shortcut (S45), the update date and time Are different from each other (S47). If the result of this determination is YES, the update date / time of the shortcut is changed to match the update date / time of the online document (S48).

  In the iteration loop (S50 to S53), online documents are listed from the list and compared with shortcuts. If it is determined that there is no shortcut corresponding to the online document (S51), a shortcut linked to the online document is created (S52).

  Furthermore, in the shortcut synchronization processing of the present embodiment, the document file created in the local storage of the client computer 2 when the network is not connected (when communication with the online storage server 3 cannot be performed) is performed at the timing of the shortcut synchronization processing. A process (S54 to S59) for automatically uploading and creating a shortcut is added. In this process, first, after a list of document files in the client computer 2 is created (S54), document files are enumerated from the list in a repetitive loop (S55 to S59) and a document transmission process (S56) is performed. The document file is automatically uploaded to the online storage server 3 and the uploaded document file is deleted from the local storage (S57), and a shortcut linked to the upload destination online document is created on the local storage (S58). ).

  As shown in FIG. 14, the document deletion process included in the client program is a process executed in response to a shortcut deletion operation (movement operation to the recycle bin), and is first set to use the net recycle bin? (S61) If the result of this determination is YES, the online storage server 3 is requested to move the online document corresponding to the deleted shortcut to the online storage net recycle bin ( S62: Recycle bin movement request transmission means) If the determination result is NO, the online storage server 3 is requested to delete the online document corresponding to the deleted shortcut (S63).

  As shown in FIG. 15, the document restoration process included in the client program is a process executed in response to a shortcut restoration operation (recovery operation from the trash box), and is in the net trash box with respect to the online storage server 3. A request is made to move the corresponding online document to the online document area of the online storage (S71: file restoration request means).

  As shown in FIG. 16, the net recycle bin browsing software included in the client program first requests the online storage server 3 for a document list of the net recycle bin (S81: recycle bin file list requesting means), and from the online storage server 3 The document list is received and displayed on the screen (S82: trash box file list display means). Next, the user's restoration operation is judged (S83). If the judgment result is YES, a restoration request for the corresponding document file in the net recycle bin is transmitted to the online storage server 3 (S84: file restoration). Requesting means) to request the monitoring agent to stop detection (S85), and further create a corresponding shortcut in the original position on the client computer 2 (S86: shortcut restoring means), and then to the monitoring agent A request to resume detection is made (S87). These processes are terminated in response to the user's termination operation (S88).

  As shown in FIG. 17, in the process related to the trash included in the server program, first, it is determined whether or not a request to move to the net trash is received from the client computer 2 (S91). In this case, the corresponding document file is moved from the online document area to the net trash box area (S92: trash box moving means). In this process, it is determined whether or not a restore request from the net trash can has been received from the client computer 2 (S93). If the result of this determination is YES, the corresponding document file in the net trash can area is stored in the online document Move to an area (S94: file restoration means). In this process, it is determined whether an online document deletion request is received from the client computer 2 (S95). If the determination result is YES, the corresponding document file is deleted (S96). Further, in this process, it is determined whether or not a net trash can list acquisition request has been received from the client computer 2 (S97). If the determination result is YES, a document list in the net trash can is acquired and the client computer 2 (S98: Recycle bin file list transmission means).

  As shown in FIG. 18, the document transmission process included in the client program is a process executed when a document file is uploaded. First, SEED (seed) is determined when uploading a document file is started. (S101). For example, the transfer start time is set to SEED, and a child key is created from this SEED and the master key (S102). Next, a transfer session is started (S103), and SEED is transmitted to the backup server 3 (S104). As a result, the server program (file receiving means) starts a reception session and receives SEED (S121), executes generation progress processing (S122) described later, and writes SEED in the online storage (S123).

  Next, on the client side, the encryption transfer process (S106 to S109) in the loop (S105 to S110) is repeated until the transfer of the document file is completed. The encrypted transfer process includes a step (S106) of reading data (A) having a size to be transferred at a time from a file, a step (S107) of generating a random number (B) of the same size from the child key, and data (A ) And a random number (B) are XORed (S108) and the encrypted data is transferred to the backup server 3 (S109). When the end of the file is reached, the transfer session is terminated. (S111).

  On the other hand, on the server side, the reception writing process (S125, S126) in the loop (S124 to S127) is repeated until the file transfer is completed. This reception writing process includes a step of receiving data from the client PC 2 (S125) and a step of writing the reception data to the online document area (S126), and the reception session ends in response to the end of the transfer session of the client PC 2. .

  The flowchart shown in FIG. 19 is a processing procedure on the client side and the server side (file transmission means) executed when downloading the document file. The document file stored in the encrypted state on the server side is shown in FIG. A processing procedure for transferring to the client side and decrypting on the client side is shown, but the decrypting procedure is the reverse procedure of the above-described encryption, and thus detailed description is omitted.

  As shown in FIG. 20, the generation progress process included in the server program is a process executed when a document file is uploaded from the client computer 2. First, the set generation number (MAX) is acquired. Later (S131), it is determined whether or not the oldest generation (MAX) document file exists (S132). If the determination result is YES, the oldest generation (MAX) document file is deleted (S133). ). Next, in the loop (S134 to S137), it is determined whether or not there is a document file of a newer version than the oldest generation (MAX) (S135). If this determination result is YES, each generation file is determined. The generation is advanced (S136).

  As shown in FIG. 21, the authentication process included in the client program is first performed for the first time after power-on (S141), first time after returning from sleep (S142), It is determined whether or not a predetermined time has elapsed since the authentication (S143), and if any is YES, the user is requested to input authentication information (ID + password, fingerprint, IC chip, etc.) (S144: authentication information). Input request means). When the authentication information is input, an authentication session is started (S145), the authentication information is transmitted to the online storage server 3 that is the authentication server (S146: authentication information transmitting means), and an authentication response is received from the online storage server 3. (S147), the authentication session is terminated (S148). If the authentication is successful (S149), the authentication process is terminated as a successful authentication (S150). If the authentication is not successful, a selection input as to whether or not to re-authenticate is requested (S151). ) If re-authentication is selected (S152), the process returns to step S144 to execute re-authentication. If re-authentication is not selected, the authentication process is terminated as an authentication failure (S153).

  As shown in FIG. 22, the authentication process included in the server program receives authentication information from the client computer 2 in response to the start of the authentication session (S161), and the received authentication information is stored in the database. The authentication information is collated (S162: authentication information collating means). When the authentication information is successfully collated (S163), a response indicating that the authentication is successful is transmitted to the client computer 2 (S164: authentication result response means). If the verification of the authentication information is not successful (S163), a response indicating that the authentication has failed is sent to the client computer 2 (S167: authentication result response means), but if the specified number of times fails within the specified period (S165) The authentication invalidity is recorded in the database (S166), and subsequent access is denied.

[Operation procedure of the entire document management system]
Next, the overall operation of the document management system 1 will be described with reference to FIGS.

  FIG. 23 shows an operation procedure of the document management system related to the monitoring agent. Specifically, when a new document file is created, a shortcut is renamed, a shortcut is duplicated, and a shortcut is deleted. The operation is shown. The operation at the time of creating a new document file is started when the application stores the document file in the local storage (S201, S202). When the monitoring agent detects this (S203), the created document file is stored. The data is read from the local storage (S204), uploaded to the online storage server 3 while being encrypted (S205), and stored in the online storage of the online storage server 3 (S206). Then, the monitoring agent deletes the document file that has been uploaded to the online storage server 3 from the client computer 2 (S207), and shortcuts linked to the document file on the online storage server 3 on the client computer 2 Is created (S208).

  The operation for changing the name of the shortcut is started when the name of the shortcut on the client computer 2 is changed (S211). When the monitoring agent detects this (S212), the file name is stored in the online storage server 3. A change request is transmitted (S213), and the name of the online document linked to the shortcut is changed (S214).

  The operation at the time of duplicating the shortcut is started when the shortcut on the client computer 2 is duplicated (copied with another name) (S221). When the monitoring agent detects this (S222), the online storage server 3 is informed. A file duplication request is transmitted (S223), the online document linked to the shortcut is duplicated (S224), and the link destination of the duplicated shortcut is changed to the duplicated online document (S225).

  The operation at the time of deleting the shortcut is started when the shortcut on the client computer 2 is deleted (S231). In the case of the setting not using the net recycle bin described above, when the monitoring agent detects deletion of a shortcut (S232), it sends a file deletion request to the online storage server 3 (S233), and deletes the online document linked to the shortcut. (S234).

  FIG. 24 shows an operation procedure of the document management system related to the online document operation software, which is started when a shortcut is opened (S301). The online document operation software transmits an online document download request linked to the shortcut to the online storage server 3 (S302), and receives an encrypted document file transferred from the online storage server 3 (S303, S304). ). Then, the received document file is decrypted and written in the temporary data area (S305), an application associated with the document file is started (S306), and the document file is delivered. Thereafter, in response to the update of the document file (S307), the online document operation software uploads the updated document file to the online storage server 3 while encrypting it (S308, S309), and stores it in the online storage (S310). Then, the update date and time of the shortcut is matched with the update date and time of the document file (S311), and the document file in the temporary data area is deleted (S312).

  FIG. 25 shows the operation procedure of the document management system related to the recycle bin. The operation when the shortcut is moved to the recycle bin, the operation when the shortcut is restored from the recycle bin, and the shortcut when the shortcut not in the recycle bin is restored. The operation is shown. The operation when the shortcut is moved to the recycle bin is started when the user of the client computer 2 performs an operation (shortcut delete operation) for moving the shortcut to the recycle bin (S401). Then, a request to move the corresponding online document to the net trash box is transmitted to the online storage server 3 (S402, S403). Receiving this, the online storage server 3 moves the corresponding online document from the online document area to the net trash (S404, S405).

  The operation when the shortcut is restored from the recycle bin is started when the user of the client computer 2 performs an operation (shortcut restore operation) for returning the shortcut in the recycle bin to the original position (S411). The detected monitoring agent transmits a request for restoring the corresponding online document in the net trash box on the online storage server 3 to the online storage server 3 (S412 and S413). Receiving this, the online storage server 3 moves the corresponding online document in the net trash to the online document area (S414, S415).

  The operation when restoring a shortcut that is not in the recycle bin is started when the net recycle bin browsing software is activated, and the activated net recycle bin browsing software requests the online storage server 3 for a file list of the net recycle bin (S421). Receiving this, the online storage server 3 acquires a file list of the net trash (S422) and transmits it to the client computer 2 (S423). The client computer 2 receives the file list from the online storage server 3 and displays it on the screen. If the user's restoration operation is determined, a restoration request for the corresponding online document in the net trash can is transmitted to the online storage server 3 (S424). Receiving this, the online storage server 3 moves the corresponding online document in the net trash to the online document area (S425, S426). Also, the net trash browsing software that has determined the user's restoration operation requests the monitoring agent to stop detection (S427), and creates a corresponding shortcut in the original position on the client computer 2 (S428), and then Then, the detection restart is requested (S429).

1 Document Management System 2 Client Computer 3 Online Storage Server 4 Network 5 Entity File 6 Shortcut

Claims (11)

A server program for operating an online storage server;
A client program for operating a client computer connected to an online storage server via a network,
The server program is:
A file receiving means for receiving a document file from a client computer and storing the received document file in an online storage;
In response to a request from the client computer, the online storage server is operated as a file transmission means for transmitting the document file on the online storage to the client computer,
The client program is:
File creation / update detection means for detecting creation and update of a document file in a local storage provided in the client computer;
An automatic uploading means for automatically uploading the document file to the online storage server when the creation / update of the document file is detected;
Automatic creation / update file deletion means for automatically deleting the entity of the document file that has been uploaded to the online storage server from the local storage of the client computer,
An open operation detecting means for detecting an open operation of a document file whose entity is on the online storage server;
An automatic download means for automatically downloading an entity of the document file that has been opened from the online storage server;
A document management program for operating a client computer as a file delivery means for delivering a downloaded document file to an application associated with the document file.   When the client program automatically deletes the entity of the document file that has been uploaded to the online storage server from the local storage of the client computer, the client program creates a corresponding document file on the online storage server. 2. The document management program according to claim 1, wherein the client computer is operated as a shortcut creation means for creating a linked shortcut.   3. The document management program according to claim 2, wherein the open operation detecting means detects an open operation of a document file whose entity is on the online storage server based on the open operation of the shortcut.   The client program compares the shortcut list created on the client computer with the list of document files on the online storage server, and synchronizes the shortcut with the document file on the online storage server. 4. The document management program according to claim 2, wherein the document management program operates a client computer. The client program is:
When the shortcut is moved to the recycle bin folder on the client computer, a recycle bin move request transmitting means for transmitting a recycle bin move request to the online storage server;
When the shortcut in the trash folder on the client computer is returned to its original position, the client computer is operated as a file restoration request means for sending a file restoration request to the online storage server,
The server program is:
A recycle bin moving means for moving a corresponding document file on the online storage server to a recycle bin folder on the online storage server when a recycle bin move request is received from a client computer;
The online storage server is operated as a file restoring means for restoring the corresponding document file in the trash folder on the online storage server to the original position when a file restoration request is received from the client computer. 5. The document management program according to any one of 4. The client program is:
A trash file list request means for sending a trash file list request to the online storage server;
When the trash file list data is received from the online storage server, the trash file list display means for displaying the data,
A file restoration request means for sending a file restoration request to the online storage server in response to a document file restoration operation on the recycle bin file list display screen;
Operate the client computer as a shortcut restoration means for restoring the shortcut corresponding to the restored document file to the original position on the client computer,
The server program is:
A trash file list sending means for sending document file list data in the trash folder on the online storage server to the client computer when receiving a trash file list request from the client computer;
The online storage server is operated as a file restoring means for restoring the corresponding document file in the trash folder on the online storage server to the original position when a file restoration request is received from the client computer. 6. The document management program according to any one of 5. The automatic uploading means encrypts the document file and uploads it to the online storage server,
The file receiving means stores the document file received from the client computer in the online storage in an encrypted state,
The file transmission means transmits the document file on the online storage to the client computer in an encrypted state,
The document management program according to any one of claims 1 to 6, wherein the automatic download unit decrypts an encrypted document file downloaded from an online storage server.   8. The document management program according to claim 1, wherein the file receiving unit stores a document file to be overwritten for a predetermined number of generations. The client program is:
Authentication information input requesting means for requesting input of ID and password;
Operate the client computer as authentication information transmitting means for transmitting the input ID and password to the online storage server,
The server program is:
Authentication information collating means for collating the received ID and password with a previously stored ID and password when receiving the ID and password from the client computer;
If the received ID and password match the pre-stored ID and password, a response indicating successful authentication is sent to the client computer. If the received ID and password do not match, the response indicating that authentication was not successful The document management program according to any one of claims 1 to 8, wherein the online storage server is operated as an authentication result response means for transmitting the message to the client computer. An online storage server and a client computer connected to the online storage server via a network;
The online storage server
A file receiving means for receiving a document file from a client computer and storing the received document file in an online storage;
In response to a request from the client computer, the file transmission means for transmitting the corresponding document file on the online storage to the client computer,
The client computer is
File creation / update detection means for detecting creation and update of a document file in a local storage provided in the client computer;
An automatic uploading means for automatically uploading the document file to the online storage server when the creation / update of the document file is detected;
Automatic creation / update file deletion means for automatically deleting the entity of the document file that has been uploaded to the online storage server from the local storage of the client computer,
An open operation detecting means for detecting an open operation of a document file whose entity is on the online storage server;
An automatic download means for automatically downloading an entity of the document file that has been opened from the online storage server;
A document management system comprising file delivery means for delivering a downloaded document file to an application associated with the document file. Using an online storage server and a client computer connected to the online storage server via a network,
In the online storage server,
A file reception procedure for receiving a document file from a client computer and storing the received document file in an online storage;
In response to a request from the client computer, execute a file transmission procedure to send the corresponding document file on the online storage to the client computer,
On the client computer,
A file creation / update detection procedure for detecting the creation and update of a document file in the local storage of the client computer;
An automatic upload procedure that automatically uploads the document file to the online storage server when it detects the creation or update of the document file;
Automatic creation / update file deletion procedure for automatically deleting the document file entity that has been uploaded to the online storage server from the local storage of the client computer,
An open operation detection procedure for detecting an open operation of a document file whose entity is on the online storage server;
An automatic download procedure for automatically downloading the actual document file from the online storage server,
A document management method, comprising: executing a file delivery procedure for delivering a downloaded document file to an application associated with the document file.