JP4516598B2 - How to control document copying - Google Patents

Description

  The present invention relates to a method for controlling copying of a part or all of an electronic document, and more particularly, to a method for suppressing copying of part or all of an electronic document using a clipboard.

  When creating or editing an electronic document (hereinafter, simply referred to as “document”), a part or all of another document (or a part of the same document) may be copied and used. Often done. In this case, the data to be copied is temporarily stored in a predetermined storage area according to the user's operation, and then read out from the storage area and written on the copy destination document. Here, this storage area is often called a clipboard. The user operation is generally called copy and paste.

  Incidentally, in recent years, leakage or outflow of personal information, secret documents, and the like (hereinafter sometimes referred to as “important documents”) may become a problem. Such leakage or leakage of important documents is often performed via the above-described clipboard. For this reason, in order to prevent leakage or outflow of information using the clipboard, for example, the following three methods have been proposed.

(1) Clearing the clipboard In this method, when an important document is opened by an application, the copy operation is effectively cleared when the copy operation is performed using that application. Disabled. In addition, the technique relevant to this method is described in patent document 1, for example.
JP 2002-149297 A

(2) Making the clipboard temporarily unavailable In this method, the clipboard is locked and cannot be used if any other document is opened while the important document is open.

(3) Writing meaningless data to the clipboard In this method, when an important document is opened in an application, the data to be stored in the clipboard when a copy operation is performed using that application. Some processing (for example, encryption) is performed on.

  According to the methods (1) to (3) described above, it is possible to prevent a part or all of the important document from being copied to another document. That is, information leakage or unauthorized leakage can be prevented.

  However, if copying of part or all of an important document to another document is uniformly prohibited, the efficiency of document creation or editing is often reduced.

An object of the present invention is to prevent leakage of important documents without reducing the efficiency of document editing.
The copy control method according to the present invention includes a procedure for determining whether or not a copy source document is a copy suppression document. If the copy source document is not a copy suppression document, the copy data specified in the copy source document If the copy source document is a copy-suppressed document and the copy source document is a copy-suppressed document, a procedure for writing the copy data specified in the copy-source document to the second storage region, whether the copy-destination document is a copy-suppressed document If the copy destination document is not a copy suppression document, the copy data written in the first storage area is transferred to the copy destination document, and the copy destination document is a copy suppression document. For example, it includes a procedure for transferring copy data written in the first storage area or the second storage area to the copy destination document.

  In the above method, if both the copy source document and the copy destination document are copy suppression documents (for example, important documents), the copy data is copied via the second storage area for copying the copy suppression document. The

  If the copy source document is a copy suppression document and the copy destination document is not a copy suppression document (that is, the copy destination document is a general document), the copy data is written to the second storage area, but the copy data read access is This is performed for the first storage area. Therefore, copy data is not transferred to the copy destination document. That is, copying from a copy-suppressed document to a general document is prohibited.

  If the copy source document is not a copy suppression document, the copy data is written to the first storage area, so that the copy data is transferred to the copy destination regardless of whether the copy destination document is a copy suppression document. .

  Thus, according to the present invention, copying from an important document to a general document is suppressed, and copying between important documents is possible. Therefore, it is possible to prevent leakage of important documents without reducing the efficiency of document editing.

  The document copy control method according to the present invention includes a procedure for copying a part or all of a document (copy source document) to a document (copy destination document or paste destination document) using a storage area prepared in advance. It is assumed that it includes. Here, in this embodiment, the storage area is a clipboard provided by an OS (for example, Windows (registered trademark) of Microsoft Corporation). Further, the copy source document and the copy destination document may be the same document or different documents. Note that a user operation for designating part or all of the copy source document as copy data in the copy source document may be referred to as a “copy operation”, and the user operation for inserting the copy data at a desired position in the copy destination document. Is sometimes referred to as a “paste operation”.

  1 to 4 are diagrams illustrating the configuration and operation of a clipboard suppression device (copy control device) according to an embodiment of the present invention. 1 to 4, the arrows drawn with bold solid lines represent signals or data flows related to the process of writing copy data from the copy source document to the clipboard. On the other hand, an arrow drawn with a thick broken line represents a signal or data flow related to a process of transferring copy data from the clipboard to the copy destination document. The clipboard suppression device is realized by executing a program described in advance on a computer.

  FIG. 1 is a diagram for explaining a schematic procedure for copying data from an important document to an important document. In FIG. 1, a document editing module 11S is, for example, an application program for editing a copy source document or a part of the function. The document editing module 11D is, for example, an application program for editing a paste destination document or a part of the function. Here, the application program that provides the document editing modules 11S and 11D is not particularly limited, but is, for example, MS-Word or MS-Excel of Microsoft Corporation.

  The clipboard 12 is a storage area provided by the OS, and temporarily stores copy data to be copied from the copy source document to the paste destination document. The clipboard 12 is basically accessible from any application.

  The important document clipboard 13 is a storage area provided separately from the clipboard 12 and temporarily stores copy data related to the important document. The important document clipboard 13 can be accessed only by the suppression modules 15S and 15D described later.

  The document determination module 14 determines whether each of the copy source document and the paste destination document is an important document or a general document. Here, the important document is a document including information (for example, personal information or confidential information) that needs to be prevented from being copied to another document. On the other hand, the general document is a document other than the important document. Note that whether each document is an important document or a general document is specified in advance by the user.

  The clipboard suppression module 15S is activated when the copy source document is an important document, and is coupled to the document editing module 11S. When copy data is specified in the copy source document, the clipboard suppression module 15S prevents the copy data from being written to the clipboard 12, and writes the copy data to the important document clipboard 13. At this time, the clipboard suppression module 15S clears the contents of the clipboard 12.

  The clipboard suppression module 15D is activated when the paste destination document is an important document, and is coupled to the document editing module 11D. When the clipboard 12 is called by the document editing module 11D, the clipboard suppression module 15D transfers the copy data written in the clipboard 12 or the important document clipboard 13 to the document editing module 11D.

  In the clipboard suppression apparatus having the above configuration, if both the copy source document and the paste destination document are important documents, the clipboard suppression modules 15S and 15D are activated and coupled to the document editing modules 11S and 11D, respectively. Here, these activation processing and combination processing are executed by activation combination instructions a1 and a2 from the document discrimination module 14.

  Here, it is assumed that the copy data CD is designated in the copy source document by the copy operation using the document editing module 11S. The copy operation by the user is not particularly limited. For example, a procedure for designating copy data CD and clicking an icon corresponding to “copy” or designating copy data CD and a predetermined key ( For example, it corresponds to a procedure of pressing “CTRL” + “C”). When this copy operation is performed, the process proceeds to the clipboard suppression module 15S. The clipboard suppression module 15S writes the copy data CD received from the document editing module 11S to the important document clipboard 13 and issues a clear instruction a3 to clear the clipboard 12.

  Subsequently, the copy data stored in the clipboard is called by a paste operation using the document editing module 11D. The paste process by the user is not particularly limited, and corresponds to, for example, a procedure for designating a position where the copy data CD is to be inserted and clicking an icon corresponding to “paste”. When this paste operation is performed, the process proceeds to the clipboard suppression module 15D. The clipboard suppression module 15D transfers the copy data CD written in the important document clipboard 13 to the document editing module 11D. Thereby, the copy and paste of the copy data CD is completed.

  As described above, when both the copy source document and the paste destination document are important documents, the copy data CD cut out from the copy source document is pasted via the important document clipboard 13 without using the clipboard 12. Copied to the destination document. That is, part or all of the important document is not stored in the clipboard 12 that can be accessed from any application, so that leakage of personal information and confidential information can be prevented, and security is improved.

  FIG. 2 is a diagram for explaining a schematic procedure for copying data from an important document to a general document. In this case, since the copy source document is an important document, the clipboard suppression module 15S is activated and coupled to the document editing module 11S. However, since the paste destination document is a general document, the clipboard suppression module 15D shown in FIG. 1 is not activated.

  In the above configuration, when the copy data CD is specified in the copy source document using the document editing module 11S, the clipboard suppression module 15S stores the copy data CD in the important document clipboard 13 as described with reference to FIG. And the clipboard 12 is cleared.

  Subsequently, a paste operation is performed by the user using the document editing module 11D. Then, the document editing module 11D accesses the clipboard 12 and tries to read data stored therein. However, the copy data CD is stored in the important document clipboard 13 and the clipboard 12 is cleared. Accordingly, the document editing module 11D cannot acquire data to be pasted into the paste destination document.

  In this way, when the copy source document is an important document and the paste destination document is a general document, the copy data CD cut out from the copy source document is accessed by the document editing module 11D that edits the paste destination document. Is stored in the important document clipboard 13. That is, it is prohibited to copy a part or all of the important document to the general document. Therefore, leakage of personal information and confidential information included in the important document can be prevented, and security is improved.

  FIG. 3 is a diagram for explaining a schematic procedure for data copying from a general document to an important document. In this case, since the copy source document is a general document, the clipboard suppression module 15S shown in FIG. 1 is not activated. On the other hand, since the paste destination document is an important document, the clipboard suppression module 15D is activated and coupled to the document editing module 11D.

  In the above configuration, when the copy data CD is designated in the copy source document, the document editing module 11S writes the copy data CD to the clipboard 12. Subsequently, a paste operation is performed using the document editing module 11D. Then, the clipboard suppression module 15D accesses the clipboard 12 and reads the copy data CD stored therein. Thereby, the copy and paste of the copy data CD is completed. At this time, the clipboard suppression module 15D issues a clear instruction a4 to clear the important document clipboard 13.

  FIG. 4 is a diagram for explaining an outline procedure for data copying from a general document to a general document. In this case, since both the copy source document and the paste destination document are general documents, neither of the clipboard suppression modules 15S and 15D shown in FIG. 1 is activated.

  In the above configuration, when the copy data CD is designated in the copy source document, the document editing module 11S writes the copy data CD to the clipboard 12. Subsequently, a paste operation is performed using the document editing module 11D. Then, the document editing module 11D accesses the clipboard 12 and reads the copy data CD stored therein. Thereby, the copy and paste of the copy data CD is completed.

  In this way, if the copy source document is a general document, the copy data CD cut out from the copy source document is pasted via the clipboard 12 regardless of whether the paste destination document is an important document or a general document. Copied to the destination document. That is, copy data cut out from a general document that does not contain personal information or confidential information is copied via the clipboard 12 accessible by an arbitrary application.

  Note that the user is not aware of the important document clipboard 13 in the above-described copy operation and paste operation. That is, the user can perform copy and paste without recognizing whether the copy is made via the clipboard 12 or the important document clipboard 13. However, when a part or all of an important document is to be copied to a general document, the copying is prohibited. In this case, the user recognizes that copying cannot be performed, for example, by an alarm message displayed on the display device.

  FIG. 5 is a diagram for explaining suppression of use of the clipboard. In FIG. 5, an application 21 for editing an important document corresponds to the document editing modules 11S and 11D combined with the clipboard suppression modules 15S and 15D. The application 22 for editing a general document corresponds to the document editing modules 11S and 11D to which the clipboard suppression modules 15S and 15D are not combined.

  When a copy operation is performed in the application 21 for editing an important document, copy C1 is executed. The copy C1 includes a process (Set Data) for writing designated copy data to the important document clipboard 13 and a process for clearing the contents of the clipboard 12. When the paste operation is performed in the application 21 that edits the important document, the paste P1 is executed. The paste P1 includes a process (Get Data) for acquiring copy data stored in the clipboard 12 or the important document clipboard 13. In the paste P1, the clipboard 12 is preferentially accessed before the important document clipboard 13 is accessed. When the copy data can be acquired from the clipboard 12, the contents are cleared without accessing the important document clipboard 13.

  When a copy operation is performed in the application 22 for editing a general document, copy C2 is executed. The copy C2 includes a process (Set Data) for writing the designated copy data to the clipboard 12. When a paste operation is performed in the application 22 for editing a general document, the paste P2 is executed. The paste P2 includes a process (Get Data) for acquiring copy data stored in the clipboard 12.

  As described above, in the copy control method of the embodiment, the important document clipboard 13 is provided separately from the clipboard 12 provided by the OS, and a part or all of the important document is copied using the important document clipboard 13. Therefore, it is possible to copy between important documents while preventing information leakage from important documents to general documents. This solves the problems of the above-described prior art 1 (clear clipboard) and prior art 3 (write meaningless data to the clipboard). In the copy control method of the embodiment, since it is not necessary to lock the OS clipboard 12, copying between important documents and copying from a general document to an important document are possible. This solves the problem of the prior art 2 (making the clipboard temporarily unavailable).

  FIG. 6 is a flowchart illustrating copy processing according to the embodiment. The processing of this flowchart is executed when the user performs a copy operation using an application for editing the copy source document.

In step S1, the operating OS clears the contents of the clipboard 12. The clipboard 12 is a storage area provided by the OS as described above.
In step S2, it is checked whether the copy source document is an important document. If the copy source document is not an important document, there is no need to perform clipboard suppression control, so the process proceeds to step S3. If the copy source document is an important document, clipboard suppression control must be performed, and the process proceeds to step S4. Whether or not the copy source document is an important document is determined based on the copy prevention information. That is, when a document to be edited is opened by a certain application, copy prevention information attached to the document (or a folder storing the document) is sent to the document discrimination module 14. Then, the document determination module 14 determines whether or not the document is an important document based on the received copy prevention information. The copy prevention information will be described in detail later.

  In step S3, a normal clipboard writing process is executed. As an example, assuming that the OS is Windows, a WINAPI function for writing designated copy data to the clipboard 12 is called and executed. Note that the processing in step S3 is executed by the document editing module 11S in FIGS.

  In step S4, the type of copy data (ASCII code data, binary data, bitmap data, etc.) is checked. In step S5, the copy data is written in the corresponding buffer of the important document clipboard 13 according to the type of the copy data. In addition, the process of step S4 and S5 is performed by the clipboard suppression module 15S in FIGS. At this time, the clipboard suppression module 15S may acquire the WINAPI function called by the document editing module 11S and execute steps S4 and S5 according to the function.

  The relationship between the procedure shown in FIGS. 1 to 4 and the flowchart shown in FIG. 6 is as follows. That is, in the case shown in FIGS. 1 and 2, steps S4 and S5 are executed, and the copy data specified in the important document is stored in the important document clipboard 13. On the other hand, in the case shown in FIGS. 3 and 4, step S <b> 3 is executed and copy data designated in the general document is stored in the clipboard 12.

  FIG. 7 is a flowchart illustrating the paste processing according to the embodiment. Note that the processing in this flowchart is executed when the user performs a paste operation using an application for editing a paste destination document.

  In step S11, it is checked whether the paste destination document is an important document. If the paste destination document is not an important document, there is no need to perform clipboard suppression control, so the process proceeds to step S12. If the paste destination document is an important document, clipboard suppression control must be performed, and the process proceeds to step S13. Whether or not the copy source document is an important document is determined based on the copy prevention information as in step S2 of FIG.

  In step S12, normal clipboard paste processing is executed. As an example, assuming that the OS is Windows, a WINAPI function for inserting copy data stored in the clipboard 12 at a specified position in the paste destination document is called and executed. Note that the processing in step S12 is executed by the document editing module 11D in FIGS.

  In step S13, it is checked whether copy data is stored in the clipboard 12. Here, the clipboard 12 is a storage area provided by the OS as described above. At this time, if copy data is stored in the clipboard 12, the important document clipboard 13 is cleared in step S14. In step S15, the copy data is read from the clipboard 12 and inserted at a designated position in the paste destination document.

  If copy data is not stored in the clipboard 12, it is checked in step S16 whether copy data is stored in the important document clipboard 13. At this time, if copy data is stored in the important document clipboard 13, the type of the copy data is checked in step S17. In step S18, the copy data is read from the corresponding buffer of the important document clipboard 13 according to the type of the copy data, and is inserted into the designated position in the paste destination document. If no copy data is stored in either the clipboard 12 or the important document clipboard 13, the process ends without performing the paste process.

  The processes in steps S13 to S18 are executed by the clipboard suppression module 15D in FIGS. At this time, the clipboard suppression module 15D may acquire the WINAPI function called by the document editing module 11D and execute steps S13 to S18 according to the function. In steps S15 and S18, the clipboard suppression module 15D reads the copy data from the clipboard (the clipboard 12 or the important document clipboard 13) and transfers it to the document editing module 11D. The document editing module 11D transfers the copy data to the pasting document. You may make it insert in the designated position.

  The relationship between the procedure shown in FIGS. 1 to 4 and the flowchart shown in FIG. 7 is as follows. That is, in the case shown in FIG. 1, since the clipboard 12 is cleared and the copy data is stored in the important document clipboard 13, steps S17 and S18 are executed, and the copy data is read from the important document clipboard 13. And inserted into the destination document. In the case shown in FIG. 2, copy data is stored in the important document clipboard 13 as in the case shown in FIG. However, since step S12 is executed and only the clipboard 12 is accessed without accessing the important document clipboard 13, nothing is pasted into the paste destination document. In the case shown in FIG. 3, since copy data is stored in the clipboard 12, steps S14 and S15 are executed, and the copy data is read from the clipboard 12 and inserted into the paste destination document. In the case shown in FIG. 4, step S12 is executed in a state where copy data is stored in the clipboard 12, so that the copy data is read from the clipboard 12 and inserted into the paste destination document.

FIG. 8 is a diagram for explaining copy prevention information. In this embodiment, it is assumed that copy prevention information is set for each folder storing one or more document files.
When the copy prevention information setting module 31 is activated in response to an instruction from the administrator, the copy prevention information setting module 31 displays a form 33 for inputting copy prevention information on the display device 32 of the computer. The administrator inputs the following information using this form 33.
1. 1. Path name of copy protection folder Setting name 3. 3. Inhibition of clipboard use: Enabled / Disabled 4. Printing suppression: valid / invalid 5. Suppression of saving as another name: valid / invalid Available applications Execution Module Path of Usable Application The copy prevention information input for each folder using the form 33 is stored in the copy prevention information storage file 34 using an identifier for identifying each folder as a search key.

  When the document editing module 11 (11S, 11D) is activated and a document containing the document editing module 11 is opened, the document determination module 14 stores the identifier of the folder storing the document in the copy prevention information storage file 34 using the search key as a search key. to access. If the corresponding copy prevention information is stored, the document discrimination module 14 extracts the copy prevention information and transmits it to the clipboard suppression module 15 (15S, 15D) and the copy prevention driver 35. The transmitted copy prevention information is registered in the clipboard suppression module 15 and the copy prevention driver 35, respectively.

  The clipboard deterrence module 15 combines with the corresponding document editing module 11 if “inhibition of clipboard use” is valid in the received copy prevention information, and thereafter operates in cooperation with the document editing module 11. The operation of the clipboard suppression module 15 is as described above.

  The copy prevention driver 35 restricts access to the corresponding folder based on the received copy information. That is, for example, access from an application other than the application registered by the administrator is rejected, and copying, moving, and deletion of files from the corresponding folder are prohibited.

  When copy protection is performed with a common policy in a plurality of terminals, the copy prevention information stored in the copy prevention information storage file 34 may be distributed to the plurality of terminals via the network. If such a configuration is introduced, a high-security system in which important documents cannot be taken out by a plurality of terminals is constructed. At this time, the user of each terminal is not aware of the setting of the copy protection function.

  FIG. 9 is a diagram for explaining prevention of file copy. In FIG. 9, when the user performs an operation to copy or move the document file A stored in the copy prevention folder 41 to another folder, the following processing is executed. Note that the file is copied or moved using, for example, file management software (eg, Microsoft Explorer). When the user operation is performed, the process proceeds to the copy prevention file system driver 42. The copy prevention file system driver 42 refers to a permission folder list registered in advance, and checks whether a file copy destination folder or a destination folder is permitted. If the copy destination or destination folder is permitted, the file specified by the user is copied or moved. On the other hand, if the copy destination or transfer destination folder is not permitted, the copy or move of the file designated by the user is rejected and an error is notified. With this configuration, it is possible to prevent users other than the administrator from taking out important documents.

  The functions according to the present invention are realized by executing a program describing the processing shown in the above flowchart using a computer. FIG. 10 shows a block diagram of a computer 100 that executes the program.

  The CPU 101 loads a program describing the above functions from the storage device 102 to the memory 103 and executes it. The storage device 102 is a hard disk, for example, and stores the program. Note that the storage device 102 may be an external storage device connected to the computer 100. The memory 103 is a semiconductor memory, for example, and is used as a work area for the CPU 101.

  The recording medium driver 104 accesses the portable recording medium 105 according to instructions from the CPU 101. The portable recording medium 105 is, for example, a semiconductor device (PC card or the like), a medium (flexible disk, magnetic tape, etc.) to which information is input / output by magnetic action, or a medium (optical disk) to which information is input / output by optical action. Etc.). The input / output device 106 includes a keyboard, a mouse, a display device, and a printer. And the communication control apparatus 107 transmits / receives data via a network according to the instruction | indication of CPU101.

  In the computer 100, the clipboard 12 and the important document clipboard 13 are provided in a predetermined area of the memory 103, and the copy prevention information storage file 34 is provided in the storage device 102 or the memory 103. The document editing module 11 (11S, 11D), the document determination module 14, the clipboard suppression module 15 (15S, 15D), and the copy prevention information setting module 31 are programs executed by the CPU 101.

FIG. 11 is a diagram for explaining a software program providing method according to the present invention. The program according to the present invention is provided, for example, by any one of the following three methods.
(1) Provided by being installed in a computer. In this case, the program is preinstalled in the computer 100 before the computer 100 is shipped, for example.
(2) Provided by being stored in a portable recording medium. In this case, the program stored in the portable recording medium 105 is basically installed in the storage device 102 via the recording medium driver 104.
(3) Provided from a program server provided on the network. In this case, basically, the computer 100 acquires a corresponding program by downloading from the program server.

  In the above-described embodiment, the description has been made assuming that “copy” is so-called “copy and paste”, but also includes so-called “cut and paste”. That is, “copying” according to the present invention includes processing when part or all of a certain document is moved to another document via the clipboard (clipboard 12 or important document clipboard 13).

  In the above-described embodiment, copy prevention information is set for each folder, and the document stored in the important folder is an important document. However, the present invention is not limited to this. That is, information for identifying important / non-important (that is, copy-inhibited document / copy-inhibited document) may be added to each document. Alternatively, it may be possible to define that a specific part in the document is an “important part”. In this case, the important document clipboard 13 is used when copying a part or all of the specific portion, and the clipboard 12 is used when copying other portions in the document.

It is a figure explaining the outline procedure of the data copy from an important document to an important document. It is a figure explaining the schematic procedure of the data copy from an important document to a general document. It is a figure explaining the schematic procedure of the data copy from a general document to an important document. It is a figure explaining the schematic procedure of the data copy from a general document to a general document. It is a figure explaining suppression of use of a clipboard. It is a flowchart which shows the copy process of embodiment. It is a flowchart which shows the paste process of embodiment. It is a figure explaining copy prevention information. It is a figure explaining prevention of file copy. It is a block diagram of a computer that executes a program describing functions of the present invention. It is a figure explaining the provision method of the software program concerning this invention.

Claims (5)

A procedure for determining whether or not the copy source document is a copy suppression document,
If the copy source document is not a copy suppression document, the copy data specified in the copy source document is written to the first storage area. If the copy source document is a copy suppression document, it is specified in the copy source document. To write the copied data to the second storage area,
A procedure for determining whether the copy destination document is a copy suppression document,
If the copy destination document is not a copy suppression document, the copy data written in the first storage area is transferred to the copy destination document, and if the copy destination document is a copy suppression document, the first data A procedure for transferring the copy data written in the storage area or the second storage area to the copy destination document ;
A procedure for clearing the second storage area when the copy source document is not a copy suppression document and the copy destination document is a copy suppression document;
Copy control program that causes a computer to execute. The program according to claim 1,
A copy control program for causing a computer to further execute a procedure for clearing the first storage area when the copy source document is a copy suppression document. The program according to claim 1,
When the copy destination document is a copy suppression document, read access is preferentially performed on the first storage area, and copy data is not stored in the first storage area. A copy control program , wherein a read access is made to the second storage area . A program for copying copy data designated in a copy source document to a copy destination document via a first storage area,
Determining means for determining whether the copy source document and the copy destination document are copy suppression documents,
When the copy source document is a copy suppression document, the copy data designated in the copy source document is prevented from being written to the first storage area, and the copy data is stored in the second storage area. writes a first inhibition means for clearing the first storage area,
When the copy destination document is a copy suppression document, the copy data written in the first storage area or the second storage area is transferred to the copy destination document, and the copy source document is copy prohibited. Second deterring means for clearing the second storage area when it is not a document ;
Copy control program to function as Means for determining whether the copy source document is a copy suppression document;
If the copy source document is not a copy suppression document, the copy data specified in the copy source document is written to the first storage area. If the copy source document is a copy suppression document, it is specified in the copy source document. Means for writing the copied data into the second storage area,
Means for determining whether the copy destination document is a copy suppression document;
If the copy destination document is not a copy suppression document, the copy data written in the first storage area is transferred to the copy destination document, and if the copy destination document is a copy suppression document, the first data Means for transferring copy data written in the storage area or the second storage area to the copy destination document;
Means for clearing the second storage area when the copy source document is not a copy suppression document and the copy destination document is a copy suppression document;
A copy control apparatus using a computer, comprising: