WO2006103752A1

WO2006103752A1 - Document copying control method

Info

Publication number: WO2006103752A1
Application number: PCT/JP2005/006023
Authority: WO
Inventors: Yasuo Abe; Yue Tian; Yuji Miyamoto
Original assignee: Fujitsu Limited
Priority date: 2005-03-30
Filing date: 2005-03-30
Publication date: 2006-10-05
Also published as: JPWO2006103752A1; JP4516598B2

Abstract

A document judging module (14) judges whether a copy source document and a copy destination document are important documents. If the copy source document is an ordinary document, specified copy data is written into a clip board (12) provided by the OS. If the copy source document is an important document, the specified copy data is written into an important document clip board (13) by a clip board suppressing module (15S). If the copy destination document is an ordinary document, copy data is read from the clip board (12). If the copy destination document is an important document, copy data is read from the important document clip board (13) by a clip board suppressing module (15D).

Description

Specification

How to control document copying

Technical field

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 a part or all of an electronic document using a clipboard.

Background art

[0002] When creating or editing an electronic document (hereinafter, simply referred to as "document"), copy or use part or all of another document (or part of the same document) Is often done. In this case, the data to be copied is stored in a predetermined storage area according to the user's operation, and then the storage area is read out and written on the copy destination document. Here, this storage area is often called the clipboard. The user operation is generally called copy and paste.

[0003] By the way, in recent years, leakage or outflow of personal information, secret documents, etc. (hereinafter sometimes referred to as “important documents”) may become a problem. Such leakage or outflow of important documents is often performed via the above-mentioned clipboard. For this reason, for example, the following three methods have been proposed to prevent the leakage or outflow of information using the clipboard.

[0004] (1) Clear clipboard

In this method, when an important document is opened in an application, when the copy operation is performed using the application, the contents of the clipboard are cleared and the copy operation is substantially invalidated. The A technique related to this method is described in Patent Document 1, for example.

Patent Document 1: JP 2002-149297 A

[0005] (2) Make the clipboard temporarily unavailable

In this method, if any other document is opened while the important document is open, the clipboard is locked and cannot be used. [0006] (3) Write meaningless data to the clipboard

In this method, when an important document is opened by an application, when the copy operation is performed using the application, some processing (for example, encryption) is performed on the data to be stored in the clipboard. ) Is applied.

[0007] According to the methods (1) to (3) described above, it is possible to prevent a part or all of an important document from being copied to another document. In other words, information leakage or illegal leakage can be prevented.

[0008] 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.

Disclosure of the invention

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 is 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 is stored in the first step. Write to the storage area 1 and the copy source document is a copy-suppressed document.

If there is, the procedure for writing the specified copy data to the second storage area in the copy source document, the procedure for determining whether or not the copy destination document is a copy suppression document, the above copy destination If the document is not a copy suppression document, the copy data written in the first storage area is transferred to the copy destination document. If the copy destination document is a copy suppression document, the first storage area or And a procedure for transferring copy data written in the second storage area to the copy destination document.

[0010] In the above method, both the copy source document and the copy destination document are copy suppression documents.

If it is (for example, an important document), the copy data is copied via the second storage area for copying the copy suppression document.

[0011] 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. Data read access is performed to the first storage area. Yo Therefore, copy data is not transferred to the copy destination document. In other words, it is prohibited to copy to a general document.

[0012] If the copy source document is not a copy suppression document, the copy data is written to the first storage area. Therefore, regardless of whether the copy destination document is a copy suppression document, the copy data is Transferred to the copy destination.

[0013] 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.

Brief Description of Drawings

[0014] FIG. 1 is a diagram for explaining an outline procedure for copying data to an important document.

[Fig. 2] Important document power This figure explains the general procedure for copying data to a general document.

[FIG. 3] —General Document Power This is a diagram explaining the general procedure for copying data to important documents.

[FIG. 4] General document capability FIG. 4 is a diagram for explaining an outline procedure for copying data to a general document.

FIG. 5 is a diagram for explaining suppression of clipboard use.

FIG. 6 is a flowchart showing copy processing according to the embodiment.

FIG. 7 is a flowchart showing a paste process according to the embodiment.

FIG. 8 is a diagram for explaining copy prevention information.

FIG. 9 is a diagram for explaining prevention of file copy.

FIG. 10 is a block diagram of a computer that executes a program describing functions of the present invention.

FIG. 11 is a diagram for explaining a software program providing method according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The document copy control method according to the present invention copies 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 the procedure to be included is included. Here, in this embodiment, the storage area is a clip board 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. A part or part of the original document The user operation that designates all as copy data is sometimes called a “copy operation”, and the user operation that inserts copy data at a desired position in the copy destination document is called a “paste operation”. Sometimes.

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. In FIGS. 1 to 4, the arrows drawn with bold solid lines represent signals or data flows related to the process of writing copy data to the copy source document clipboard. On the other hand, an arrow drawn with a thick broken line represents a signal or data flow related to the process of transferring the 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.

[0017] FIG. 1 is a diagram for explaining an outline procedure for copying important data in an important document.

In FIG. 1, a document editing module 11S is, for example, an abrasion 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 module 11S, 1 ID 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 can basically be accessed by any application.

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

[0020] The document discrimination module 14 discriminates whether the copy source document and the paste destination document are important documents or general documents, respectively. Here, an important document is a document that contains information (for example, personal information or confidential information) that needs to be prevented from being copied to other documents. 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

[0021] 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 designated in the copy source document, the clipboard suppression module 15S suppresses 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.

[0022] 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 device 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 al and a2 from the document discrimination module 14.

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

[0025] Subsequently, the pasting operation using the document editing module 11D is performed on the clipboard. Stored copy data is called. 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 should be inserted and clicking an icon corresponding to “paste”. When this paste operation is performed, the process moves 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. This completes copy-and-paste of the copy data CD.

[0026] As described above, when both the copy source document and the paste destination document are important documents, the copy data CD from which the copy source document power is also extracted passes through the important document clipboard 13 without using the clipboard 12. To be copied to the destination document. In other words, some or all of the important documents are not stored in the clip board 12 accessible by any application, so leakage of personal information and confidential information can be prevented and security is improved.

FIG. 2 is a diagram for explaining an outline 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 combined with the document editing module 11S. However, since the pasting document is a general document, the clipboard suppression module 15D shown in Fig. 1 is not activated.

[0028] In the above configuration, when the copy data CD is specified in the copy source document using the document editing module 11S, as described with reference to FIG. 1, the clipboard suppression module 15S performs the copy data CD. Is written to the important document clipboard 13 and the clipboard 12 is cleared.

[0029] 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 the data stored therein. However, the copy data CD is stored in the important document clip board 13 and the clipboard 12 is cleared. Therefore, the document editing module 11D cannot obtain the data to be pasted into the paste destination document.

As described above, the copy source document is an important document and the paste destination document is a general document. At this time, the copy data CD extracted from the copy source document is stored in the important document clipboard 13 which cannot be accessed by the document editing module 11D for editing the paste destination document. In other words, it is prohibited to copy some or all important documents to general documents. Therefore, leakage of personal information and confidential information contained in important documents can be prevented, and security is improved.

FIG. 3 is a diagram for explaining a general procedure for copying data to a general document ability 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 pasted document is an important document, the clipboard suppression module 15D is activated and combined with the document editing module 11D.

In the above configuration, when the copy data CD is specified 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. This completes the copy and paste of the copy data CD. 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 copying data 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 specified 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. This completes the copy and paste of the copy data CD.

[0035] In this way, if the copy source document is a general document, the copy data CD cut out from the copy source document is stored in the clipboard 12 regardless of whether the paste destination document is an important document or a general document. To the pasted document. That is, personal information and Copy data extracted from general documents, including confidential information, is copied via the clipboard 12 accessible by any application.

Note that the user is not aware of the important document clip board 13 in the above-described copy operation and paste operation. That is, the user can perform copy and paste without recognizing whether the copy was made via the clipboard 12 or copied via the important document clipboard 13. However, if you try to copy part or all of an important document to a general document, that copy is prohibited. In this case, the user recognizes that copying cannot be performed by, for example, 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 that edits an important document, copy C1 is executed. This copy C1 includes a process of writing specified copy data to the important document clipboard 13 (Set Data) and a process of clearing the contents of the clipboard 12. When a paste operation is performed in the application 21 that edits an important document, paste P1 is executed. This paste P1 includes a process (Get Data) for acquiring copy data stored in the clipboard 12 or the important document clipboard 13. Note that in the paste P1, the clipboard 12 is preferentially accessed before the important document clipboard 13 is accessed. When copy data can be acquired from the clipboard 12, the contents are cleared without accessing the important document clipboard 13.

[0039] When a copy operation is performed in the application 22 for editing a general document, copy C2 is executed. Copy C2 includes processing (Set Data) to write the specified copy data to clipboard 12. Further, when a paste operation is performed in the application 22 for editing a general document, 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 of the important document or the important document clipboard 13 is used. Since everything is copied, it is possible to copy between important documents while preventing information leakage from important documents to general documents. This solves the problems of Conventional Technique 1 (Clear Clipboard) and Conventional Technique 3 (Write meaningless data to the clipboard). Further, in the copy control method of the embodiment, since it is not necessary to lock the OS clipboard 12, it is possible to copy between important documents and copy to general documents. This solves the problem of Prior Art 2 (making the clipboard temporarily unavailable).

FIG. 6 is a flowchart showing copy processing according to the embodiment. This flow chart process is executed when a user performs a copy operation using an application for editing a copy source document.

[0042] In step S1, the operating OS clears the contents of the clipboard 12. As described above, the clip board 12 is a storage area provided by the OS.

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, it is not necessary to perform clipboard suppression control. Therefore, the process proceeds to step S3. If the copy source document is an important document, clipboard suppression control must be performed. Proceed to 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 an 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.

[0043] In step S3, normal clipboard writing processing is executed. As an example, assuming that the OS is Windows, the WINAPI function for writing the specified 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.

[0044] In step S4, the type of copy data (ASCII code data, binary data, bit data) Check the map data). In step S5, the copy data is written into the corresponding buffer of the important document clipboard 13 according to the type of the copy data. Note that the processes of steps S4 and S5 are executed by the clipboard suppression module 15S in FIGS. At this time, the clipboard suppression module 15S acquires the WINAPI function called by the document editing module 11S and executes steps S4 and S5 according to the function.

[0045] 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 designated in the important document is stored in the important document clipboard 13. On the other hand, in the cases shown in FIGS. 3 and 4, step S3 is executed, and the copy data designated in the general document is stored in the clipboard 12.

FIG. 7 is a flowchart showing the paste process of the embodiment. This flow chart process is executed when the user performs a paste operation using an application for editing the paste destination document.

In step S 11, it is checked whether or not the paste destination document is an important document. If the destination document is not an important document, clipboard suppression control is not necessary. Therefore, the process proceeds to step S12. If the paste destination document is an important document, clipboard suppression control is required. Proceed to 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.

[0048] In step S12, normal clipboard paste processing is executed. As an example, assuming that OS is Windows, the WINAPI function for inserting the copy data stored in the clipboard 12 at the 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. Then, in step S 15 Read the copy data from the clipboard 12 and insert it at the specified position in the destination document.

If copy data is not stored in the clipboard 12, whether or not the copy data is stored in the important document clipboard 13 is checked in step S16. 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 corresponding buffer capacity of the important document clipboard 13 also reads the copy data according to the type of the copy data, and inserts it at the designated position in the paste destination document. If copy data is also stored in the clipboard 12 and the important document clipboard 13, the process ends without performing the paste process.

[0051] 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 (clipboard 12 or important document clipboard 13), transfers it to the document edit module 11D, and the document edit module 11D pastes the copy data. Insert it at the specified position in the destination document.

[0052] The relationship between the procedure shown in FIGS. 1 to 4 and the flowchart shown in FIG. 7 is as follows.

In other words, 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 is inserted into the pasted document. In the case shown in FIG. 2, copy data is stored in the important document clip board 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. Shown in Figure 4 In this case, since step SI2 is executed with the copy data stored in clipboard 12, the copy data is read from clipboard 12 and inserted into the paste destination document.

FIG. 8 is a diagram for explaining copy prevention information. In this embodiment, copy protection information is set for each folder storing one or more document files.

When the copy protection information setting module 31 is activated in response to an instruction from the administrator, the copy protection information setting module 31 displays a form 33 for inputting copy protection information on the display device 32 of the computer. The administrator uses this form 33 to input the following information.

1. Path name of copy protection folder

2.Setting name

3. Suppression of clipboard use: Enabled Z disabled

4. Printing suppression: Enabled Z Disabled

5. Suppression of saving as: Enable Z Disable

6. Application available

7. Executable module path of available applications

The copy protection information input for each folder using the form 33 is stored in the copy protection information storage file 34 using an identifier for identifying each folder as a search key.

[0054] When the document editing module 11 (11S, 1 ID) is activated and the document editing module 11 is opened, the document discrimination module 14 uses the identifier of the folder storing the document as a search key to prevent copying. Access information storage file 34. 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 sent copy prevention information is registered in the clipboard suppression module 15 and the copy prevention driver 35, respectively.

The clipboard suppression module 15 combines with the corresponding document editing module 11 if “suppression of clipboard use” is valid in the received copy prevention information, and thereafter, the document editing module 11 Works in conjunction with. Clipboard suppression module 15 The operation 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 applications other than those registered by the administrator is denied, and files from the corresponding folder are rejected.

Copy, move and delete are prohibited.

[0057] 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 highly secure system will be constructed in which important documents cannot be taken out by multiple terminals. 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 protection folder 41 to another folder, the following processing is executed. Note that the file is copied or moved using, for example, file management software (for example, Microsoft Explorer). When the above user operation is performed, the process proceeds to the copy protection file system driver 42. The copy prevention file system driver 42 refers to the permitted folder list registered in advance, and checks whether the file copy destination folder or the 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 move destination folder is not permitted, the copy or move of the file specified 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.

[0059] The functions according to the present invention are realized by executing a program describing the processing shown in the flowchart above using a computer. A block diagram of a computer 100 that executes the program is shown in FIG.

The CPU 101 loads a program describing the above-described functions from the storage device 102 to the memory 103 and executes it. The storage device 102 is a hard disk, for example. Store. 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, etc.), a medium (information such as a flexible disk or a magnetic tape) to which information is input / output by magnetic action, or a medium to which information is input / output by optical action (Including optical discs). The input / output device 106 includes a keyboard, a mouse, a display device, and a printer. Then, the communication control device 107 transmits / receives data via the network in accordance with instructions from the CPU 101.

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.

The program according to the present invention is provided, for example, by any one of the following three methods. (1) Provided by being installed on a computer. In this case, for example, the program is preinstalled in the computer 100 before the computer 100 is shipped.

(2) Provided by being stored in a portable recording medium. In this case, it is stored in the portable recording medium 105.

The program to be executed is basically installed in the storage device 102 via the recording medium driver 104.

(3) Provided by the program Sanoku provided on the network. In this case, basically, the computer 100 acquires the corresponding program by downloading the program server capability.

[0064] In the above-described embodiment, the “copy” force V and the so-called “copy and paste” are described, but so-called “cut and paste” is also included. In other words, the “copy” according to the present invention is a part or all of a document clipboard (clipboard 12 or important It also includes processing for moving to another document via the document clipboard 13). Further, in the above-described embodiment, the copy prevention information is set for each folder, and the document stored in the important folder is an important document. The present invention is not limited to this. That is, information for identifying important Z non-important (that is, copy-inhibited document Z-copy-inhibited document) may be assigned 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 to copy a part or all of the specific portion, and the clipboard 12 is used to copy other portions in the document.

Claims

The scope of the claims

[1] 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 specified copy data is written to the first storage area in the copy source document, and if the copy source document is a copy suppression document, the copy source To write the copy data specified in the document 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 to the first storage area is transferred to the copy destination document, and if the copy destination document is a copy suppression document, the first A program for causing a computer to execute a copy control method comprising a procedure of transferring copy data written to one storage area or the second storage area to a copy destination document.

[2] The program according to claim 1,

The method further includes a procedure of clearing the first storage area when the copy source document is a copy suppression document.

[3] The program according to claim 1,

The method further includes a procedure of clearing the second storage area when the copy source document is not a copy suppression document and the copy destination document is an S copy suppression document.

[4] A program executed by a computer for copying copy data designated in a copy source document to a copy destination document via a first storage area,

A discriminating means for discriminating whether each of the copy source document and the copy destination document is a copy suppression document;

When the copy source document is a copy suppression document, the copy data specified 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. A first deterrent to write to the 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. A second deterrent,

A program for providing a copy control apparatus having

[5] The program according to claim 4,

The first deterrent means clears the first storage area,

The second suppression means clears the second storage area when the copy source document is a copy suppression document.

[6] 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.

If the data is not read, the second storage area is read-accessed.

[7] A copy control method used with a computer,

Determine whether the copy source document is a copy suppression document,

If the copy source document is not a copy suppression document, write the copy data specified in the copy source document to the first storage area.

If the copy source document is a copy suppression document, the specified copy data is written to the second storage area.

Determine 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 to the first storage area is transferred to the copy destination document, and

A copy control method for transferring copy data written in the first storage area or the second storage area to the copy destination document if the copy destination document is a copy suppression document.

[8] A copy control device for copying copy data designated in a copy source document to a copy destination document via a first storage area,

When the copy source document is a copy suppression document, the copy source document A first deterrent means for preventing the set copy data from being written to the first storage area and writing the copy data to the second storage area;

Second deterring means for transferring copy data written in the first storage area or the second storage area to the copy destination document when the copy destination document is a copy deterrence document;

A copy control device.