JP2007088595A - Document editing apparatus and document editing method thereof, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that an opened electronic document file cannot have been protected excepting that an OS (Operating System) sets an access right in conventional electronic binders when no security can be placed on a file format included in the electronic binders and that an electronic document substantially to be deleted remains and thereafter the remaining electronic document has a possibility of being illegitimately referenced when an electronic binder application is abnormally terminated. <P>SOLUTION: A shared key is created from information whose reacquisition is difficult when the electronic binder is opened on the basis of a prescribed encryption algorithm, and when an electronic document is opened from the electronic binder, the electronic document is encrypted by using the shared key and stored as an encrypted electronic document file, and when the electronic document is archived to the electronic binder, the encrypted electronic document is decrypted by using the key used at the encryption and then archived, and the key information is discarded when the program is terminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information processing apparatus and method, and a computer-readable memory constituting an electronic compressed archive composed of a plurality of types of electronic documents.

  Companies are introducing document management systems to promote document reuse. Early products used to capture paper documents as images with a scanner and register and save them. Recently, however, many electronic documents have been made on personal computers, and they can now be registered and stored.

  Recently, an arbitrary page can be extracted from a plurality of registered electronic documents, compressed and archived using a predetermined encryption compression archive algorithm, and handled as one electronic document. This is called an electronic binder here.

  An application that processes an electronic binder is referred to as an electronic binder application.

  When processing the electronic binder, the electronic binder application expands the electronic binder compressed and archived in an arbitrary temporary directory on the PC, and processes the internal electronic document file.

  In addition, the electronic binder application can convert the electronic document into print appearance data and intermediate print data and store the converted data in the electronic binder. By printing the print appearance data and the intermediate print data, the user can obtain almost the same print result regardless of the difference in printing environment.

  The created electronic binder can be opened to edit the internal electronic document or change its configuration. The user can take out an electronic document included in the electronic binder and perform an editing process using an application associated with each electronic document. In addition, it is possible to change attribute information attached to an electronic document. It is also possible to change the print appearance data and intermediate print data.

  When archiving an electronic binder, confidentiality from the outside is maintained according to a predetermined encryption algorithm. Electronic binders can have various types of electronic document files. However, if the file format allows security settings, the user, electronic binder application, or electronic binder applies security settings to each electronic document. The uncompressed electronic document that has been expanded can be protected.

For example, Patent Document 1 and Patent Document 2 can be cited as conventional examples.
JP 2000-29829 A Japanese Patent Laid-Open No. 11-73398

  However, if security cannot be set for the file format, the conventional electronic binder cannot protect the deployed electronic document file except when the access authority is set from the OS. Further, when the electronic binder application is terminated abnormally, there is a possibility that an electronic document that should be deleted when the electronic binder application is terminated remains and is referred to illegally thereafter.

  The present invention has been made to solve the above problems, and creates a common key based on a predetermined encryption algorithm from information that is difficult to re-acquire when deploying an electronic binder, and creates an electronic document from the electronic binder. Encrypted using a common key when unpacking and stored as an encrypted electronic document file. When archiving to an electronic binder, the encrypted electronic document is decrypted using the key used for encryption An object of the present invention is to provide an information processing apparatus and method for archiving and discarding key information when a program ends, and a computer-readable memory.

In order to achieve the above object, an information processing apparatus according to the present invention comprises the following arrangement. That is, an information processing apparatus that configures a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Means for compressing the electronic document file in a predetermined compression format to create a compressed electronic document file;
Means for combining the compressed electronic document created by the compressed electronic document file creating means to create an electronic binder;
Means for separating the electronic document archive file created by the electronic binder creating means and separating it into compressed electronic documents;
Decompressing means for decompressing the compressed electronic document created by the separating means based on a predetermined compression format to create an uncompressed electronic document;
A common key creating means for creating a common key in accordance with a predetermined encryption format;
Encryption means for encrypting the compressed electronic document or the uncompressed electronic document using a common key created by the common key creation means;
And an encryption compressed electronic document created by the encryption means or a decryption means for decrypting the encrypted electronic document.

In order to achieve the above object, an information processing apparatus according to the present invention comprises the following arrangement. That is, an information processing method for configuring a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Compressing the electronic document file in a predetermined compression format to create a compressed electronic document file;
Combining the compressed electronic document created by the compressed electronic document file creating step to create an electronic binder;
Separating the electronic document archive file created by the electronic binder creating step and separating it into each compressed electronic document;
A decompression step of decompressing the compressed electronic document created by the separation step based on a predetermined compression format to create an uncompressed electronic document;
A common key creation step for creating a common key in accordance with a predetermined encryption format;
An encryption step of encrypting the compressed electronic document or the uncompressed electronic document using the common key created by the common key creation step;
A decryption step of decrypting the encrypted compressed electronic document or the encrypted electronic document created by the encryption step.

In order to achieve the above object, an information processing apparatus according to the present invention comprises the following arrangement. That is, a computer readable memory storing a program code for information processing constituting a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Program code for compressing the electronic document file in a predetermined compression format to create a compressed electronic document file;
A program code for creating an electronic binder by combining compressed electronic documents created by the compressed electronic document file creation program code;
A program code for separating an electronic document archive file created by the electronic binder creating program code and separating it into compressed electronic documents;
Decompression program code for decompressing a compressed electronic document created by the program code to be separated based on a predetermined compression format to create an uncompressed electronic document; and
A common key creation program code for creating a common key in accordance with a predetermined encryption format;
An encryption program code for encrypting the compressed electronic document or the uncompressed electronic document using a common key created by the common key creation program code;
And an encrypted compressed electronic document created by the encrypted program code or a decrypted program code for decrypting the encrypted electronic document.

  As described above, according to the present invention, when an electronic binder obtained by compressing and archiving an electronic document is expanded, the electronic document is encrypted with a predetermined algorithm using a common key created based on information that is difficult to obtain again. Information processing apparatus and method for improving security of the electronic binder by extracting the file as a file in the computer and reconstructing the electronic binder by decrypting the encrypted electronic document with the above-mentioned common key and compressing the archive A computer readable memory can be provided.

  Since this common key is stored in the memory, if the program terminates illegally for some reason with the electronic binder being edited in the expanded folder, the memory is released and the encrypted electronic document can be viewed. In addition, it is difficult to re-acquire temporary information as a key source, and security can be improved.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a conceptual diagram of an electronic binder according to the present embodiment and an electronic document bound therein.

  An electronic binder 103 is created by archiving the electronic document group 101. The electronic document group 101 is various application files. In general, there are various compression methods used when file compression is performed, and the compression used in this embodiment is performed using a predetermined lossless compression algorithm.

  In FIG. 1, the file header 107 has information on the electronic binder itself and information such as the creation date and time.

  The compression information table 110 has addresses of the compressed electronic document 104 and the uncompressed electronic document 108 included in the electronic binder 103, and accesses the compressed electronic document 104 and the uncompressed electronic document 108 with reference to these addresses.

  The compressed electronic document 105 is extracted from the electronic binder 103 so that the compressed electronic document 104 bound to the electronic binder 103 can be processed by an application. The compressed electronic document 105 is decompressed using a decompression algorithm corresponding to the compression format used at the time of compression, and an electronic document 106 is created.

  In the case of the uncompressed electronic document 108, the electronic document 109 can be extracted by acquiring the file offset and the file size.

  Figure 2 shows the process of creating a common key from its own process ID and thread ID inside the program when encrypting a compressed and archived electronic document group as an electronic binder. It is the flowchart which showed.

  In step 201, it is determined whether the common key is already held in the memory inside the program. If the common key is not discarded using the procedure shown below, it can be used continuously. If the common key is in the program, go to step 205. If not, go to step 202.

  In step 202, the process ID and thread ID of the program are acquired, and the process proceeds to step 203.

  In step 203, a common key is created based on a predetermined algorithm using the process ID and thread ID acquired in step 202, and the process proceeds to step 204. The generated common key follows a predetermined key information format used in the encryption format in step 211.

  In step 205, it is determined whether to use an existing key. If the key is to be used continuously, the process proceeds to step 206. If the existing key cannot be used for some reason, the process proceeds to step 202 to create a new common key.

  In step 206, the key is acquired from the key management DB 207, and the process proceeds to step 204.

  In step 204, a loop process for processing each compressed electronic document file in the electronic binder is started, and the process proceeds to step 208.

  In step 208, each compressed electronic document file is extracted from the electronic binder based on a predetermined algorithm, and the process proceeds to step 209.

  In step 209, decompression of the compressed electron molecule file is started based on a predetermined algorithm. In step 210, it is determined whether the compressed electronic document file currently being processed is a file to be encrypted. The electronic document to be encrypted is an arbitrary electronic document designated by the user or an electronic document having a specific extension. If it is determined that it should be encrypted, the process proceeds to step 211. If it is determined that encryption is not necessary, the process proceeds to step 212.

  In step 211, decompression processing is performed, encryption is performed in a predetermined encryption format that matches the common key created in step 203 or the common key acquired in step 206, the file is output, and the process proceeds to step 212.

  In step 212, the end condition of the decompression processing loop of each compressed electronic document file included in the electronic binder is determined. If all electronic documents included in the electronic binder have been developed, the process ends. If there is an electronic document that has not been expanded yet, the process returns to step 204 to continue the decompression process.

  Figure 3 shows the case where the electronic document data encrypted with the common key is decrypted and archived using the electronic document group as the electronic binder, and for some reason it cannot be decrypted because it does not have the common key for encryption. FIG. 5 is a flowchart showing a process of archiving and combining with an electronic binder after deleting an encrypted file.

  A compression processing loop for compressing each electronic document expanded in step 301 is started, and the process proceeds to step 302.

  In step 302, it is determined whether a common key exists in the memory managed by the currently activated program. If it exists, the process proceeds to 303, and if not, the process proceeds to 307.

  In step 303, it is determined whether or not the electronic document file currently being processed is encrypted in a format suitable for the format of the common key managed by the program. If it is determined that the data is encrypted, the process proceeds to step 304. If it is determined that the data is not encrypted, the process proceeds to step 305.

  In step 304, the encrypted electronic document file is decrypted using the common key managed by the program, and the process proceeds to step 305.

  In step 305, it is determined whether the electronic document is to be compressed based on a predetermined determination condition. If it is determined that compression should be performed, the process proceeds to step 306. If it is determined that compression is not necessary, the process proceeds to step 307.

  In step 306, the electronic document file is compressed based on a predetermined algorithm, and the process proceeds to step 309.

  In step 307, it is determined whether the electronic document currently being processed is encrypted. If it is encrypted, the process proceeds to step 308. If it is not encrypted, the process proceeds to step 305.

  In step 308, the encrypted file is deleted. At this time, the deleted file is notified to the user.

  A condition for ending the loop of the process of compressing the electronic document developed in step 309 is determined. If all the expanded electronic documents have been determined, the processing loop is terminated and the process proceeds to step 310. If there is an electronic document that has not been processed, the process proceeds to step 301 and the compression process is continued.

  The compressed electronic document and the uncompressed electronic document processed so far in step 310 are combined, header information and footer information are added, the electronic binder is reconfigured, and the process proceeds to step 311.

  After deleting each electronic document developed in step 311, the process ends.

  Fig. 4 shows how to create a common key from the current time and the password phrase entered by the user inside the program when decompressing a group of electronic documents that have been compressed and archived as an electronic binder. It is the flowchart which showed the process to perform.

  In step 401, it is determined whether the common key is already held in the memory inside the program. If the common key is not discarded using the procedure shown below, it can be used continuously. If the common key is in the program, the process proceeds to step 405, and if not, the process proceeds to step 402.

  In step 402, the current time is acquired. In the case of acquisition, in order to prevent duplication as much as possible, all the year / month / day / hour / minute / second / millisecond are obtained, and the process proceeds to Step 403.

  In step 404, the user enters a password phrase.

  In step 403, a common key is created based on a predetermined algorithm using the time information acquired in step 402 and the password phrase information acquired in step 404, and the process proceeds to step 409. The generated common key follows a predetermined key information format used in the encryption format in step 412.

  In step 406, it is determined whether to use an existing key. If it is used continuously, the process proceeds to step 407, and if the existing key cannot be used for some reason, the process proceeds to step 402 to create a new common key.

  In step 407, a key is acquired from the key management DB 408, and the process proceeds to step 409.

  In step 409, a loop process for processing each compressed electronic document file in the electronic binder is started, and the process proceeds to step 410.

  In step 410, each compressed electronic document file is extracted from the electronic binder based on a predetermined algorithm, and the process proceeds to step 411.

  In step 411, decompression of the compressed electron molecule file is started based on a predetermined algorithm. In step 412, it is determined whether the compressed electronic document file currently being processed is a file to be encrypted. The electronic document to be encrypted is an arbitrary electronic document designated by the user or an electronic document having a specific extension. If it is determined that the data should be encrypted, the process proceeds to step 413. If it is determined that the data need not be encrypted, the process proceeds to step 414.

  In step 413, decompression processing is performed, encryption is performed in a predetermined encryption format that matches the common key created in step 403 or the common key acquired in step 407, output as a file, and the process proceeds to step 414.

  In step 414, the termination condition of the decompression processing loop of each compressed electronic document file included in the electronic binder is determined. If all electronic documents included in the electronic binder have been developed, the process ends. If there is an electronic document that has not been expanded yet, the process returns to step 409 to continue the decompression process.

  Figure 5 shows that when compressing and archiving a group of electronic documents as an electronic binder, the electronic document data encrypted with the common key is decrypted, and for some reason, it cannot be decrypted because it does not have the common key for encryption. In this case, after the encrypted file is deleted, it is re-acquired from the expansion source electronic binder, archived, and combined with the electronic binder.

  A compression processing loop for compressing each electronic document expanded in step 501 is started, and the process proceeds to step 502.

  In step 502, it is determined whether a common key exists in the memory managed by the currently activated program. If it exists, go to 503, otherwise go to 506.

  In step 503, it is determined whether or not the electronic document file currently being processed is encrypted in a format suitable for the format of the common key managed by the program. If it is determined that the data is encrypted, the process proceeds to step 504. If it is determined that the data is not encrypted, the process proceeds to step 510.

  In step 504, the encrypted electronic document file is decrypted using the common key managed by the program, and the flow advances to step 510.

  In step 510, it is determined whether the electronic document is to be compressed based on a predetermined determination condition.

  If it is determined that compression should be performed, the process proceeds to step 511. If it is determined that compression is not necessary, the process proceeds to step 512. In step 511, the electronic document file is compressed based on a predetermined algorithm, and the process proceeds to step 512.

  In step 506, it is determined whether the electronic document currently being processed is encrypted. If it is encrypted, the process proceeds to step 507. If it is not encrypted, the process proceeds to step 510.

  In step 507, the electronic document currently being processed is deleted. At this time, the deleted file is notified to the user.

  The condition for ending the loop of the process of compressing the electronic document expanded in step 512 is determined. If all the expanded electronic documents have been determined, the processing loop is terminated and the process proceeds to step 513. If there is an electronic document that has not been processed yet, the process proceeds to step 501 and the compression process is continued.

  In step 513, the compressed electronic document and the uncompressed electronic document processed so far are combined, header information and footer information are added, the electronic binder is reconfigured, and the process proceeds to step 514.

  After deleting each electronic document developed in step 514, the process ends.

  Fig. 6 shows how to obtain a MAC key and a user account of the PC running the program inside the program and create a common key from these information when expanding the compressed and archived electronic document group as an electronic binder. 5 is a flowchart showing a process of encrypting a file using and then expanding the file.

  In step 601, it is determined whether the common key is already held in the memory inside the program. If the common key is not discarded using the procedure shown below, it can be used continuously. If the common key is in the program, the process proceeds to step 605, and if not, the process proceeds to step 602.

  In step 602, the MAC address and user account of the PC on which the program is running are acquired, and the process proceeds to step 603.

  In step 603, a common key is created based on a predetermined algorithm using the MAC address and user account of the operating PC acquired in step 602, and the process proceeds to step 604.

  The generated common key follows a predetermined key information format used in the encryption format in step 611.

  In step 605, it is determined whether to use an existing key. If the key is to be used continuously, the process proceeds to step 606. If the existing key cannot be used for some reason, the process proceeds to step 602 to create a new common key.

  In step 606, a key is acquired from the key management DB 607, and the process proceeds to step 604.

  In step 604, a loop process for processing each compressed electronic document file in the electronic binder is started, and the process proceeds to step 608.

  In step 608, each compressed electronic document file is extracted from the electronic binder based on a predetermined algorithm, and the process proceeds to step 609.

  In step 609, decompression of the compressed electron molecule file is started based on a predetermined algorithm. In step 610, it is determined whether the compressed electronic document file currently being processed is a file to be encrypted. The electronic document to be encrypted is an arbitrary electronic document designated by the user or an electronic document having a specific extension. If it is determined that encryption is to be performed, the process proceeds to step 611. If it is determined that encryption is not necessary, the process proceeds to step 612.

  In step 611, decompression processing is performed, encryption is performed in a predetermined encryption format that matches the common key created in step 603 or the common key acquired in step 606, the file is output, and the process proceeds to step 612.

  In step 612, the end condition of the decompression processing loop of each compressed electronic document file included in the electronic binder is determined. If all electronic documents included in the electronic binder have been expanded, the process ends. If there is an electronic document that has not been expanded yet, the process returns to step 604 to continue the decompression process.

  Fig. 7 shows the case where the electronic document data encrypted with the common key is decrypted and archived using the electronic document group as the electronic binder, and for some reason it cannot be decrypted because it does not have the common key for encryption. FIG. 4 is a flowchart showing a process of deleting an encrypted file, archiving it, combining it with an electronic binder, saving an existing unedited electronic binder before editing, and holding it as a backup file.

  A compression processing loop for compressing each electronic document developed in step 701 is started, and the process proceeds to step 702.

  In step 702, it is determined whether a common key exists in the memory managed by the currently running program. If it exists, the process proceeds to step 703, and if not, the process proceeds to step 705.

  In step 703, it is determined whether or not the electronic document file currently being processed is encrypted in a format that conforms to the format of the common key managed by the program. If it is determined that the data is encrypted, the process proceeds to step 704. If it is determined that the data is not encrypted, the process proceeds to step 708.

  In step 704, the encrypted electronic document file is decrypted using the common key managed by the program, and the flow advances to step 708.

  In step 708, it is determined whether the electronic document is to be compressed based on a predetermined determination condition.

  If it is determined that compression is to be performed, the process proceeds to step 709. If it is determined that compression is not necessary, the process proceeds to step 710.

  In step 709, the electronic document file is compressed based on a predetermined algorithm, and the process proceeds to step 710.

  In step 705, it is determined whether the electronic document currently being processed is encrypted. If it is encrypted, the process proceeds to step 706. If it is not encrypted, the process proceeds to step 708.

  In step 706, the encrypted file is deleted. At this time, the deleted file is notified to the user.

  In step 707, the deletion flag indicating deletion is turned ON.

  In step 710, a condition for ending the processing loop for compressing the electronic document developed is determined. If all the expanded electronic documents have been determined, the processing loop is terminated and the process proceeds to step 711. If there is an electronic document that has not been processed, the process proceeds to step 701 and the compression process is continued.

  In step 711, a deletion flag is determined to determine whether there is an encrypted file that has been deleted because it does not have a common key. If the deletion flag is ON, the process proceeds to step 712. If the deletion flag is OFF, the process proceeds to step 713.

  In step 712, the expansion source existing electronic binder is saved with a different name, and the flow advances to step 713.

  In step 713, the compressed electronic document and the uncompressed electronic document processed so far are combined, header information and footer information are added, the electronic binder is reconfigured, and the process proceeds to step 714.

  After deleting each electronic document developed in step 714, the process ends.

  FIG. 8 is a block diagram showing a configuration of an information processing apparatus applicable to the document management system of the present invention.

  In FIG. 8, the CPU 802 executes control of the entire information processing apparatus 801 via the main bus 807, and inputs devices 811 (for example, an image scanner, a storage device, and a network line) connected to the outside of the information processing apparatus 801. Other information processing apparatuses connected via the telephone line, facsimiles connected via a telephone line, etc.) are controlled via an input I / F (interface) 805. Further, an output device 812 connected to the outside of the information processing device 801 (for example, a printer, a monitor, another information processing device connected via a network line, a facsimile connected via a telephone line, etc.) is output I. Control via / F806. In addition, the CPU 802 inputs an image, performs image processing, color conversion processing, and image according to an instruction input from an input unit (for example, a keyboard 813, a pointing device 814, or a pen 815) via a KBDI / F (keyboard interface) 808. A series of processing such as output control is executed. Further, the display unit 810 that displays image data input from the input device 811 and image data created using the keyboard 813, pointing device 814, and pen 815 is controlled via the video I / F (interface 809).

  The ROM 803 stores various control programs that execute various controls of the CPU 802. The RAM 804 is loaded and executed by the CPU 802 with the OS and other control programs including a control program for realizing the present invention. It also functions as various work areas and temporary save areas used for executing the control program. Further, a VRAM (not shown) that temporarily holds image data input from the input device 811 and image data created using the keyboard 813, the pointing device 814, and the pen 815 is configured.

  Note that the present invention can be applied to a system (for example, a copier, a facsimile machine, etc.) consisting of a single device even if it is applied to a system composed of a plurality of devices (for example, a host computer, interface device, reader, printer, etc.) You may apply.

  Another object of the present invention is to supply a storage medium storing software program codes for implementing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in the.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

  When the present invention is applied to the above storage medium, the storage medium stores program codes corresponding to the flowcharts shown in FIGS. 2, 3, 4, 5, 6, and 7 described above. It will be.

It is a conceptual diagram which shows the relationship between the document management system of this embodiment, an electronic binder, and an electronic document. It is the flowchart which showed the common key creation process from the process ID and thread ID of the electronic binder application program which is one Example of this invention, and the expansion | deployment process of an electronic binder. It is the flowchart which showed the decoding process of the encryption electronic document of the electronic binder application program which is one Example of this invention, and an electronic binder creation process. It is the flowchart which showed the common key production | generation process from the present time of the electronic binder application program which is one Example of this invention, and a user input passphrase, and the expansion | deployment process of an electronic binder. It is the flowchart which showed the decoding process of the encryption electronic document of the electronic binder application program which is one Example of this invention, and an electronic binder creation process. 7 is a flowchart showing a common key creation process and an electronic binder deployment process based on the MAC address and user account information of an operation PC of an electronic binder application program according to an embodiment of the present invention. It is the flowchart which showed the decoding process of the encryption electronic document of the electronic binder application program which is one Example of this invention, and an electronic binder creation process. It is a block diagram which shows the structure of the information processing apparatus applicable to the document management system of this embodiment.

Claims (24)

An information processing apparatus that configures a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Means for compressing the electronic document file according to a predetermined algorithm to create a compressed electronic document file;
Means for archiving the electronic document file and the compressed electronic document to create an electronic document archive file;
Means for acquiring the compressed electronic document file information stored in the compressed electronic document archive file when a request for reading the electronic document file information stored therein is issued to the compressed electronic document archive file; ,
A means for displaying the compressed electronic document file information acquired by the information acquisition means; and selecting any compressed electronic document in the previous electronic document archive file with reference to the electronic document information displayed by the information display means Means to
Means for extracting the compressed electronic document file by the selection means according to an extraction algorithm corresponding to the compressed archive algorithm and decompressing the compressed electronic document file according to an decompression algorithm corresponding to the compressed archive algorithm;
Means for creating a common key from information provided by a user according to a predetermined algorithm;
Means for arranging the common key created by using the common key creating means on a memory managed by the program or a storage area on the disk;
Means for encrypting the uncompressed electronic document file decompressed by the decompressing means using the common key created by the common key creating means;
An information processing apparatus comprising: means for decrypting the encrypted electronic document encrypted by the encryption means.   2. The information processing apparatus according to claim 1, wherein the common key creating means has means for acquiring a process ID of the program during program operation and automatically creating a key based on the process ID.   2. The information processing apparatus according to claim 1, wherein the common key creating means has means for acquiring a thread ID of the program during program operation and automatically creating a key based on the thread ID.   2. The information processing apparatus according to claim 1, wherein the common key creating means has means for obtaining a current time of the program during program operation and automatically creating a key based on the current time.   The information processing apparatus according to claim 1, wherein the common key creating unit includes a unit that automatically creates a key based on an indefinite-length password phrase acquired from a user of the program during a program operation.   2. The information processing apparatus according to claim 1, wherein the common key creating means has means for acquiring a MAC address at which the program operates during program operation and automatically creating a key based on the MAC address. .   2. The information processing according to claim 1, wherein the common key creating means has means for acquiring user account information for operating the program and automatically creating a key based on the user account information when the program operates. apparatus.   2. The information processing apparatus according to claim 1, wherein the common key management means includes means for automatically discarding a common key managed by the program when the program ends. An information processing method for configuring a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Compressing the electronic document file according to a predetermined algorithm to create a compressed electronic document file;
Archiving the electronic document file and the compressed electronic document to create an electronic document archive file;
Obtaining the compressed electronic document file information stored in the compressed electronic document archive file when a read request for the electronic document file information stored therein is issued to the compressed electronic document archive file; ,
The step of displaying the compressed electronic document file information acquired by the information acquisition step and the electronic document information displayed by the information display step are selected, and an arbitrary compressed electronic document in the previous electronic document archive file is selected. And a process of
Extracting the compressed electronic document file according to the extraction algorithm corresponding to the compressed archive algorithm by the selecting step, and decompressing the compressed electronic document file according to the decompression algorithm corresponding to the compressed archive algorithm;
Creating a common key from information provided by the user according to a predetermined algorithm;
Placing the common key created using the common key creating step on a memory managed by the program or a storage area on the disk;
Encrypting the uncompressed electronic document file decompressed by the decompression step using the common key created by the common key creation step;
An information processing method comprising: a step of decrypting the encrypted electronic document encrypted by the encryption step.   10. The information processing method according to claim 9, wherein the common key creating step includes a step of obtaining a process ID of the program during program operation and automatically creating a key based on the process ID.   10. The information processing method according to claim 9, wherein the common key creating step includes a step of acquiring a thread ID of the program during program operation and automatically creating a key based on the acquired thread ID.   10. The information processing method according to claim 9, wherein the common key creating step includes a step of acquiring a current time of the program during program operation and automatically creating a key based on the current time.   10. The information processing method according to claim 9, wherein the common key creating step includes a step of automatically creating a key based on an indefinite length password phrase acquired from a user of the program during the program operation.   10. The information processing method according to claim 9, wherein the common key creation step includes a step of acquiring a MAC address at which the program operates during program operation and automatically generating a key based on the MAC address. .   10. The information processing according to claim 9, wherein the common key creating step includes a step of acquiring user account information on which the program operates during program operation and automatically generating a key based on the user account information. Method.   10. The information processing method according to claim 9, wherein the common key management step includes a step of automatically discarding the common key managed by the program when the program ends. A computer readable memory storing a program code for information processing constituting a compressed electronic document archive file composed of a plurality of electronic document files created on various applications,
Program code of the step of compressing the electronic document file according to a predetermined algorithm to create a compressed electronic document file;
Program code for archiving the electronic document file and the compressed electronic document to create an electronic document archive file;
A step of obtaining the compressed electronic document file information stored in the compressed electronic document archive file when a request for reading the electronic document file information stored therein is issued to the compressed electronic document archive file; Program code,
A previous term electronic document archive file with reference to the program code of the step of displaying the compressed electronic document file information acquired by the program code of the information acquisition step and the electronic document information displayed by the program code of the information display step Program code of the process of selecting any compressed electronic document in;
Program code of the step of extracting the compressed electronic document file according to the extraction algorithm corresponding to the compressed archive algorithm by the program code of the selection step and decompressing the compressed electronic document file according to the decompression algorithm corresponding to the compressed archive algorithm; ,
A program code of a step of creating a common key from information given by a user according to a predetermined algorithm;
A program code of a step of arranging a common key created using the program code of the common key creation step on a memory managed by the program or a storage area on a disk;
A program code of a step of encrypting an uncompressed electronic document file decompressed by the program code of the decompression step using a common key created by the program code of the common key creation step;
A computer readable memory storing a program code for information processing, comprising: a program code for decrypting an encrypted electronic document encrypted by the program code for the encryption step.   The program code of the common key creation step has a program code of a step of obtaining a process ID of the program at the time of program operation and automatically creating a key based on the process ID. A computer-readable memory in which program codes for information processing are stored.   18. The program code of the common key creation step has a program code of a step of acquiring a thread ID of the program at the time of program operation and automatically creating a key based on the acquired thread ID. A computer-readable memory in which program codes for information processing are stored.   The program code of the common key creation step has a program code of a step of obtaining a current time of the program at the time of program operation and automatically creating a key based on the current time. A computer-readable memory in which program codes for information processing are stored.   18. The program code of the step of automatically creating a key based on an indefinite length password phrase acquired from a user of the program at the time of program operation, the program code of the common key creating step according to claim 17 A computer-readable memory in which the program code for the information processing described is stored.   18. The program code of the common key creating step has a program code of a step of acquiring a MAC address at which the program operates during program operation and automatically creating a key based on the MAC address. A computer-readable memory in which the program code for information processing described in 1 is stored.   The program code of the common key creation step has a program code of a step of acquiring user account information on which the program operates during program operation and automatically creating a key based on the acquired user account information. A computer-readable memory in which the program code for information processing according to 17 is stored.   The program code of the information processing according to claim 17, wherein the program code of the common key management step has a program code of a step of automatically discarding the common key managed by the program when the program ends. Computer readable memory.

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