JP2000099384A - Method and system for high-security data link between various communication networks and storage medium storing data link program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To link data while keeping consistency of data base and file between various networks by linking data containing the data base or file in the network, updating, adding, converting or deleting the data. SOLUTION: Concerning a data linker for linking data, it is monitored whether data are updated by a computer in the network or not (S1). When the data are updated at the first computer (S2), only the updated data are transferred from the computer of the first network to the data linker (S3). By the data linker, the transferred data are transformed into data format or data contents suitable for the computer of the second network as the link destination (S4) and while using a network protocol suitable for the second network, data are transferred to the computer of the second network (S5).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-security data linkage method for different communication networks, a high-security data linkage system between different communication networks, and a storage medium storing a data linkage program. The present invention relates to a high-security data cooperation method for different communication networks in the mutual use of data between different networks, a high-security data cooperation system between different communication networks, and a storage medium storing a data cooperation program.

[0002]

2. Description of the Related Art Conventionally, in a communication network, cooperation of data such as a database and a file in the same network is realized by a method as shown in FIG. In network A, computer A-
1 has a function of monitoring the database, a function of performing data conversion, a function of transferring data, and a function of updating data for a database, and a function of monitoring the file for a file. It has a function of performing data conversion, a function of transferring data, and a function of updating data.

FIG. 15 is a flowchart for explaining the operation of the conventional system. Computer A-1 between computers A-1 and A-2 in the same network A
Step 10) Monitor the data in the computer A-1 if the data is updated from A to A-2.

Step 11) If the data has been updated, the data in the computer A-1 is converted into a data format and data contents suitable for the computer A-2. Step 12) Data is transferred from the computer A-1 to the computer A-2. Step 13) Store the data in the computer A-2.

[0005]

However, in the above-mentioned conventional method, data cooperation within the same network is possible, but data cooperation cannot be performed between different networks. Is limited to the same network. Also,
There is a problem that it is not possible to cooperate while maintaining the consistency between the database and the file.

[0006] The present invention has been made in view of the above points, and enables cooperation between different networks.
Also, while keeping the database and files consistent,
It is an object of the present invention to provide a high-security data cooperation method between different communication networks enabling data cooperation and a storage medium storing a high-security data cooperation system and a data cooperation program between different communication networks.

A further object of the present invention is to provide a security problem when exchanging data between different networks. Therefore, different communication networks which can cooperate with each other with high security maintained. An object of the present invention is to provide a high-security data cooperation method, a high-security data cooperation system between different communication networks, and a storage medium storing a data cooperation program.

[0008]

Means for Solving the Problems The present invention (claim 1) provides:
In a high-security data cooperation method of different communication networks in the mutual use of data between different networks in a communication network, data including databases and files in the network is linked, data update, data addition, data conversion, data Perform the deletion.

FIG. 1 is a diagram for explaining the principle of the present invention. According to the present invention (claim 2), in a data linking apparatus for performing data linking, it is monitored whether or not data has been updated by a computer in a network (step 1).
If the computer has been updated (step 2),
Only the updated data is transferred from the computer on the first network to the data linking device (step 3), and the transferred data is transferred to the data linking device by the data linking device at the second link.
Is converted into a data format and data contents suitable for the computer on the second network (step 4), and data is transferred to the computer on the second network using a network protocol suitable for the second network (step 5). .

The present invention (claim 3) performs data update, data addition, data conversion, and data deletion by mutually linking necessary data between a plurality of computers in a plurality of different networks to a required network. . The present invention (claim 4) distributes the load of the data coordination function between computers on a plurality of different networks, and reduces the load on the computers.

The present invention (claim 5) detects a load of a data link function between a plurality of computers on different networks to be linked and, on a computer with the smallest load, updates the data to be linked. The data is converted into a data format and data contents suitable for the computer, and the converted data is transferred to the computer to be linked.

According to the present invention (claim 6), the load is distributed to other computers to be linked, and the load of the data link function is distributed. The present invention (claim 7) reduces the load on the network by archiving the data and transmitting it to another computer to be linked. The present invention (claim 8) is a high-security data cooperation system in the mutual use of data between different communication networks, which links data including databases and files in the network, updates data, and adds data. , A data linking device that performs data conversion and data deletion.

FIG. 2 is a diagram showing the principle of the present invention. According to the present invention (claim 9), in the data linking apparatus 100, the update monitoring means 110 for monitoring whether data has been updated by a computer in the network, and only the updated data from the computer in the updated network are acquired. A data conversion unit 120 for converting the transferred data into a data format and data content suitable for a computer on the network of the cooperation destination; Data transfer means 130 for transferring to a computer
Having.

According to the present invention (claim 10), the data conversion means 120 includes means for converting the transferred data into a data format and data contents for each computer of the network of the cooperation destination. It includes means for transferring the data converted by the conversion means 120 to each computer on the network of the cooperation destination.

According to the present invention (claim 11), a plurality of computers on different networks convert load data into a data format and data content suitable for a cooperating computer, with load sensing means for detecting the load state of the own computer. The data linking device includes a conversion unit, an archive processing unit for archiving the converted data, a transfer unit for transferring the data, and a decompression unit for decompressing the transferred data. Load state sensing means for sensing, load monitoring means for monitoring the load of the data link function for each of a plurality of computers on different networks, and conversion request means for requesting the conversion of data from the least loaded computer by the load monitoring means If the load on the local computer is the lowest, the Including a data decompression means for decompressing the archive processed data, and a cooperation destination transfer means for transferring the data obtained from the conversion request destination computer to the cooperation destination.

According to the present invention (claim 12), the cooperation destination transfer means includes means for archiving and transmitting data. The present invention (claim 13) is a storage medium storing a data linking program mounted on a data linking device in a high-security data linking system in the mutual use of data between different communication networks. An update monitoring process that monitors for data updates, and if there is,
A data conversion process that obtains only the updated data and converts the transferred data into a data format and data content suitable for the computer on the link destination network, and a protocol suitable for the computer on the link destination network A data transfer process for transferring the data to a computer on the network of the cooperation destination.

The present invention (claim 14) includes, in the data conversion process, a process of converting the transferred data into a data format and data contents for each computer of the network of the cooperation destination. And transferring the data converted in step (1) to each computer on the network of the cooperation destination.

The present invention (claim 15) provides a load state sensing process for sensing the load state of the own computer, a load monitoring process for monitoring the load of the data link function for each computer on a plurality of different networks, and a load monitoring process. A conversion request process for requesting data conversion from a computer with the lowest load, and a data decompression process for decompressing archived data obtained from the conversion request destination computer when the load on the computer is the lowest. And a cooperation destination transfer process for transferring data acquired from the conversion request destination computer to the cooperation destination.

[0019] The present invention (claim 16) is a storage medium storing a high security data cooperation program between different communication networks mounted on a computer of a network in a data cooperation system in the mutual use of data between different communication networks. There, a load sensing process for sensing the load state of the own computer, a conversion process for converting data into a data format and data contents of a cooperation destination, an archive processing process for archiving the converted data, and transferring the data. It has a transfer process and a decompression process for decompressing the transferred data.

The present invention (claim 17) includes a process of archiving and transmitting data in the cooperation destination transfer process. As described above, according to the present invention, when a database and a file of the first network are updated by a data linking function having a data update monitoring function, a data conversion function, a data transfer function, and an access control function, an advanced By cooperating with the second network while maintaining security, the database and files of the computer on the first network are monitored, and when there is an update, the data is transferred to the data cooperation server, and the data is transferred to the second network. Performs data conversion to a suitable data format and data content. Since data can be transferred to the computer on the second network and the data on the second network can be updated, data linkage between different networks can be performed while maintaining consistency between the database and the file. It becomes possible.

[0021]

FIG. 3 shows a system configuration of the present invention. The system shown in the figure has two networks A,
B and the data linking apparatus 100. The data linking apparatus 100 links a database and a file in each computer in the networks A and B to perform data update, data addition, data conversion, and data deletion. The data update monitoring unit 110, the data conversion unit 1
20, a network A data transfer unit 130, a network B data transfer unit 140, an access control unit 150, and a storage unit 160.

The storage unit 16 of the data linking apparatus 100
In 0, it is assumed that the protocol data of each different network that performs data cooperation, the data format of data to be cooperated in each computer in each network, and information of data contents are set. The same applies to the embodiments described later. The data update monitoring unit 1
At 10, the database or file in the network is monitored for updates.

In the data conversion unit 120, based on a certain function, for example, in the case of price information,
Processing such as converting a price excluding tax to a price including tax is performed. FIG. 4 is a sequence chart showing the operation of the system of the present invention. Step 101) The data update monitoring unit 110 of the data linking apparatus 100 monitors whether or not the computer A in the network A has been updated.

Step 102) If there is an update, the computer A in the network A sends only the updated data to the data linking apparatus 100,
Transfer using the appropriate network protocol. Step 103) The data conversion unit 120 of the data linking device 100 converts the transferred data into a data format and data contents suitable for the computer B in the network B.

Step 104) Data linking apparatus 100
The network B data transfer unit 140 transfers data to the computer B in the network B using a network protocol suitable for the network B. This makes it possible to perform data cooperation between different networks. Note that the data cooperation device 100 having the data cooperation function is realized by an arbitrary computer.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] In the example of FIG. 4 described above, a method of data cooperation between two networks has been described. However, in this embodiment, mutually necessary data is exchanged between a plurality of computers in a plurality of different networks. An example of performing data update, data addition, data conversion, and data deletion by linking data to a network will be described.

FIG. 5 is a sequence chart showing the operation of the system according to the first embodiment of the present invention. The example in the figure is
Network A is composed of four networks A, B, C, and D, and two computers A
-1, A-2, the network B has one computer B, the network C has one computer C, and the network D has two computers D-1, D-2. In this case, the data linking apparatus 100 further includes a network C data transfer unit 160 and a network D data transfer unit 170 in FIG.
The following description will be made assuming that it is added to the configuration of FIG.

Step 201) Data linking apparatus 100
In the data update monitoring unit 110 in the
The computer A-1 and the computer A-2 in the network B and the computer B in the network B monitor whether there is an update. Step 202) If there is an update, transfer only the updated data using a network protocol suitable for the network A and the network B, respectively.

Step 203) Data linking apparatus 100
The data conversion unit 120 converts the transferred data into a data format and data contents suitable for the computer C in the network C and the computers D-1 and D-2 in the network D. Step 204) The data transfer unit 160 for the network C and the data transfer unit 170 for the network D of the data linking apparatus 100 use the network C or the computer C in the network C by using a network protocol suitable for the network D.
The data is transferred to the computers D-1 and D-2.

The above processing enables data cooperation between a plurality of computers on a plurality of different networks. [Second Embodiment] In the present embodiment, an example will be described in which a function for distributing the load of the data cooperation function and reducing the load on the network is added to the above functions.

FIG. 6 shows a system configuration according to a second embodiment of the present invention. The system shown in FIG.
0, a network A having a computer A including a load sensing unit 320, a data archive unit 330, a data decompression unit 340, a database, and a file, a data conversion unit 410, a load sensing unit 420, and a data archive unit 43.
0, a data decompression unit 440, a network B having a computer B composed of a database and files, and a data linking device 200.

The data linking device 200 includes a data update monitoring unit 210, a data conversion unit 220, a network A data transfer unit 230, and a network B data transfer unit 24.
0, a load monitoring unit 250, a load sensing unit 260, a data archive unit 270, a data decompression unit 280, and an access control unit 290. Data archive unit 330, 4
The archive processing at 30, 270 collectively manages a plurality of files, or performs compression processing, or both processings. For example, LHA, UNIX, and the like are performed.
Tar and the like.

The load monitor 250 monitors the load status of each computer. Specifically, for example, at the time of data linkage, the load sensing unit 260 sends C
It requests each load sensing unit to acquire the PU usage rate. Each load sensing unit monitors the CPU usage rate of each computer. It is assumed that the information is transmitted to the load sensing unit 260 of the data linking apparatus 200, and based on the information from the load sensing unit 260, the load monitoring unit 250 operates by referring to the data.

The operation of the above configuration will be described. 7, 8, and 9 are sequence charts showing the operation of the system according to the second embodiment of the present invention. Step 301) The data update monitoring unit 210 of the data link device 200 monitors whether or not the computer A in the network A has been updated.

Step 302) If there is an update, the load monitoring unit 250 of the data link device 200 uses the computer A in the network A, the data link device 200, and the network B in the network A based on the load status information from the load sensing unit 260. Monitor which computer B has a smaller load. Step 303) When the load on the computer A is the least, the data linking apparatus 200 requests the computer A for data conversion and data archiving.

Step 304) In the computer A, the data conversion section 310 converts the updated data into a data format and data contents suitable for the computer B in the network B. Step 305) The data archive section 330 of the computer A archives the data converted by the data conversion section 310 and notifies the data linking apparatus 200 of the end of the archive processing.

Step 306) Data linkage device 200
Acquires data archived from the computer A by a network protocol suitable for the network A. Step 307) Data is transferred from the network B data transfer unit 240 of the data linking apparatus 200 to the computer B using a network protocol suitable for the network B.

Step 308) The data decompression unit 440 of the computer B on the network B decompresses the transferred data and stores the data. Step 309) If it is determined in step 303 that the load on the data cooperation apparatus 200 is the least, the data cooperation apparatus 200 requests the computer A in the network A to archive the data.

Step 310) The updated data is archived by the archive section 330 of the computer A, and the data linking apparatus 200 is notified of the end of the archive processing. Step 311) The data linking apparatus 200 acquires data archived from the computer A by a network protocol suitable for the network A. Step 312) In the data decompression unit 280 of the data cooperation device 200, the data archived by the computer A is decompressed.

Step 313) Data linkage device 200
The data converter 220 converts the decompressed data into a data format and data content suitable for the computer B in the network B. Step 314) The archive unit 280 of the data link device 200 archives the data converted by the data conversion unit 220.

Step 315) Data linkage device 200
From the network B data transfer unit 2340 to the computer B using a network protocol suitable for the network B. Step 316) Data Decompression Unit 44 of Computer B
At 0, the data transferred from the data linking device 200 is decompressed and the data is stored.

Step 317) If the load on the computer B is the smallest in the determination in step 303, the data linking apparatus 200 requests the computer A to perform a data archive process. Step 318) Archive unit 33 of computer A
0 archives the updated data and notifies the data linking apparatus 200 of the end of the archiving process.

Step 319) Data linking apparatus 200
Acquires data archived from the computer A by a network protocol suitable for the network A. Step 320) The network B data transfer unit 240 of the data cooperation device 200 transfers data to the computer B using a network protocol suitable for the network B.

Step 321) The data decompressing section 440 of the computer B decompresses the transferred data. Step 322) Data Conversion Unit 41 of Computer B
0 converts the data decompressed by the computer B into a data format and data contents suitable for the computer B in the network B, and stores the data.

As described above, when data cooperation is performed between different networks, the load of the data cooperation function and the network load can be reduced. According to the first and second embodiments, data cooperation can be performed without depending on the functions of the existing system. [Third Embodiment] Next, in this embodiment, an example will be described in which, in order to distribute the load of the data cooperation function, another computer to be cooperated performs load distribution.

The system configuration is similar to that of the second embodiment. FIGS. 10, 11 and 12 are sequence charts showing the operation of the system according to the third embodiment of the present invention. Step 401) The data update monitoring unit 210 of the data cooperation device 200 monitors whether or not the computer A in the network A has been updated.

Step 402) If there is an update, the load monitoring unit 250 of the data linking apparatus 200 monitors which of the computer A in the network A, the data linking apparatus 200, and the computer B in the network B has a smaller load. I do. As for the load status of each device, each load sensing unit (320, 260, 420) constantly monitors the load status of the computer, and the load monitoring unit 250
A computer with a small load is determined by obtaining load status data from these load sensing units.

Step 403) Data linking apparatus 200
As a result of monitoring by the load monitoring unit 250, if the load on the computer A is the smallest, the data linking apparatus 200 requests the computer A to perform a data conversion process. Step 404) The data conversion section 310 of the computer A converts the data into a data format and data contents suitable for the computer B in the network B.

Step 405) The necessary data is transferred from the computer A to the data linking apparatus 200 using a network protocol suitable for the network A. Step 406) Data is transferred from the network B data transfer unit 240 of the data linking apparatus 200 to the computer B using a network protocol suitable for the network B.

Step 407) If the load on the data linking apparatus 200 is the smallest in the determination in step 402, the computer A transfers the updated data to the data linking apparatus 200 using a network protocol suitable for the network A. . Step 408) The data transferred from the computer A is converted into a data format and data content suitable for the computer B in the network B by the data converter 220 of the data linking apparatus 200.

Step 409) Data linkage device 200
The network B data transfer unit 240 transfers data to the computer B using a network protocol suitable for the network B. Step 410) If it is determined in step 402 that the load on the computer B is the smallest, the computer A transmits only the updated data to the data linking apparatus 200.
Using a network protocol suitable for network A.

Step 411) Data linkage device 200
The network B data transfer unit 240 transfers data to the computer B using a network protocol suitable for the network B. Step 412) Data Conversion Unit 41 of Computer B
0 is a data format suitable for the computer B in the network B,
Convert the data to data contents and store the data.

The above processing makes it possible to reduce the load on the data linking apparatus 200 when linking data between different networks. [Fourth Embodiment] In the present embodiment, an example will be described in which data is collectively transmitted in the processing for reducing the load on the network of the third embodiment.

FIG. 13 is a sequence chart showing the operation of the system according to the fourth embodiment of the present invention. Step 501) The data update monitoring unit 210 of the data cooperation device 200 monitors whether or not the computer A in the network A has been updated. Step 502) When there is an update in the data update monitoring unit 210 of the data cooperation device 200, the data cooperation device 200 requests the computer A in the network A to archive the data.

Step 503) The data archive section 330 of the computer A archives the updated data, and notifies the data linking apparatus 200 of the end of the archive processing. Step 504) The data linking apparatus 200 acquires data archived from the computer A by a network protocol suitable for the network A.

Step 505) Data linking apparatus 200
The data decompression unit 280 decompresses data archived by the computer A. Step 506) The data converter 220 of the data linking apparatus 200 converts the decompressed data into a data format and data content suitable for the computer B in the network B.

Step 507) Data linking device 200
The data archive unit 270 archives the converted data. Step 508) The network B data transfer unit 240 of the data cooperation device 200 transfers data to the computer B using a network protocol suitable for the network B.

Step 509) The data decompression section 440 of the computer B decompresses the data archived by the data linking apparatus 200 and stores the data. With the above processing, it is possible to reduce the load on the network when performing data cooperation between different networks. In the third and fourth embodiments, the performance of the entire data linkage can be improved.

Although the above description has been made based on the configuration shown in FIGS. 3 and 6, the components of the data linking apparatus 200 are constructed as a program and connected to a computer used as the data linking apparatus. The present invention can be easily realized by storing the program in a portable storage medium such as a disk device, a floppy disk, a CD-ROM, or the like, and installing it when implementing the present invention.

The present invention is not limited to the above embodiments, but can be variously modified and applied within the scope of the claims.

[0061]

As described above, according to the present invention, data cooperation can be performed between different networks.
In addition, access control between networks can be performed only via the data linking device, and a computer on one network cannot directly access a computer on a different network, so that high security can be maintained.

Further, by registering information on whether data can be linked to the data linking device in advance, it is possible to link only necessary data, and to hide information that the system does not want to show. It is. Also,
Conventionally, when building an Internet mall, even if the company has a product management system in the past, the Internet mall is often operated independently, and each time it is necessary to register information in the two systems However, according to the present invention, the merchandise information of the existing system can be linked to the merchandise information on the Internet mall and reflected,
There is no need to double-register in the system, and it is possible to easily reuse the data in the system already owned by the company, and to reduce the operation cost.

In the present invention, in a business transaction,
Since the data cooperation server (data cooperation device) includes security and access control functions based on IP isolation, the security of the existing system can be further maintained, and the existing system can be effectively reused.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention.

FIG. 2 is a principle configuration diagram of the present invention.

FIG. 3 is a system configuration diagram of the present invention.

FIG. 4 is a sequence chart showing the operation of the system of the present invention.

FIG. 5 is a sequence chart illustrating an operation of the system according to the first exemplary embodiment of the present invention.

FIG. 6 is a system configuration diagram of a second embodiment of the present invention.

FIG. 7 is a sequence chart (1) showing an operation of the system according to the second embodiment of the present invention.

FIG. 8 is a sequence chart (No. 2) showing the operation of the system according to the second example of the present invention.

FIG. 9 is a sequence chart (part 3) showing the operation of the system according to the second example of the present invention.

FIG. 10 is a sequence chart (1) showing an operation of the system according to the third embodiment of the present invention.

FIG. 11 is a sequence chart (part 2) illustrating the operation of the system according to the third example of the present invention.

FIG. 12 is a sequence chart (part 3) illustrating the operation of the system according to the third example of the present invention.

FIG. 13 is a sequence chart showing an operation of the system according to the fourth example of the present invention.

FIG. 14 is a configuration diagram of a conventional system.

FIG. 15 is a diagram for explaining the operation of the conventional method.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 data linking device 110 data update monitoring means, data update monitoring section 120 data conversion means, data conversion section 130 network transfer means, data transfer section for network A 140 data transfer section for network B 150 access control means, access control section 160 storage Unit 200 data linking device 210 data update monitoring unit 220 data conversion unit 230 network A data transfer unit 240 network B data transfer unit 250 load monitoring unit 260 load sensing unit 270 data archive unit 280 data decompression unit 290 access control unit 310 data Conversion unit 320 Load sensing unit 330 Data archive unit 340 Data decompression unit 410 Data conversion unit 420 Load detection unit 430 Data archive unit 440 Data decompression unit

Claims (17)

[Claims] 1. A high-security data linking method for different communication networks in the mutual use of data between different networks in a communication network, wherein data including a database or a file in the network is linked, data is updated, and data is updated. A highly secure data linkage method for different communication networks, characterized by performing addition, data conversion, and data deletion. 2. A data linking apparatus for performing data linking, wherein a computer in a network monitors whether the data has been updated, and only data updated from a computer in the updated first network is linked to the data linking apparatus. In the data linking device, the transferred data is converted into a data format and data content suitable for a computer of a link destination second network, and a network protocol suitable for the second network is used. 2. The method according to claim 1, wherein the data is transferred to a computer on the second network. 3. The different communication according to claim 1, wherein data necessary for each other between a plurality of computers in a plurality of different networks is linked to necessary networks to perform data update, data addition, data conversion, and data deletion. A highly secure data linkage method for networks. 4. The high-security data cooperation method for different communication networks according to claim 1, wherein the load of the data cooperation function is distributed among the computers on the plurality of different networks to reduce the load on the computer. 5. A method for detecting a load of a data cooperation function between a plurality of computers on different networks to be cooperated, and updating the updated data on a computer having the smallest load in a data format suitable for the computer to be cooperated. 5. The high-security data linkage method for different communication networks according to claim 4, wherein the content is converted into data contents, and the converted data is transferred to the cooperation target computer. 6. The computer according to claim 4, wherein a load is distributed to another computer to be cooperated to distribute a load of the data coordination function.
6. A high security data linkage method for different communication networks according to claims 5 and 5. 7. The high-security data cooperation method for different communication networks according to claim 6, wherein the data is archived and transmitted to the other computer to be cooperated to reduce the load on the network. 8. A high-security data cooperation system between different communication networks in the mutual use of data between communication networks, wherein data including a database and a file in the network are linked, and data updating and data A high-security data linkage system between different communication networks, characterized by having a data linkage device for adding, converting, and deleting data. 9. The data linking device, comprising: update monitoring means for monitoring whether or not the data has been updated by a computer in a network; and acquiring only the updated data from the computer in the updated network and transferring the data. Data conversion means for converting the data into a data format and data content suitable for a computer on the network of the cooperation destination; and transferring the data to a computer on the network of the cooperation destination using a protocol suitable for the computer on the network of the cooperation destination 9. The highly secure data cooperation system between different communication networks according to claim 8, further comprising a data transfer unit that performs data transfer. 10. The data conversion means includes means for converting the transferred data into a data format and data contents for each computer of a network of a cooperation destination, wherein the data transfer means is converted by the data conversion means. 10. The high security data cooperation system between different communication networks according to claim 8, further comprising means for transferring data to each computer of the network of the cooperation destination. 11. The computer of the plurality of different networks, a load sensing unit for sensing a load state of the own computer, a conversion unit for converting data into a data format and data content suitable for a cooperating computer, Archive processing means for archiving the transferred data, transfer means for transferring the data, and decompression means for decompressing the transferred data, wherein the data linking apparatus detects a load state of its own computer. Means, load monitoring means for monitoring the load of the data cooperation function for each of the computers on the plurality of different networks, conversion request means for requesting the least-loaded computer to convert data by the load monitoring means, If the load on the computer is the lowest, the 10. High security between different communication networks according to claim 8 and 9, further comprising: data decompression means for decompressing the archived data; and cooperation destination transfer means for transferring data obtained from the computer of the conversion request destination to the cooperation destination. Data linkage system. 12. The high security data cooperation system between different communication networks according to claim 11, wherein said cooperation destination transfer means includes means for archiving and transmitting said data. 13. A storage medium storing a data linking program mounted on a data linking device in a high security data linking system in the mutual use of data between different communication networks, wherein the data is updated by a computer in the network. An update monitoring process for monitoring whether there has been an update, acquiring only the updated data from the computer on the network where the update has occurred, and converting the transferred data into a data format and data content suitable for the computer on the network of the link destination A storage medium storing a data cooperation program, comprising: a data conversion process; and a data transfer process of converting the data into a protocol suitable for a computer of the cooperation destination network and transferring the data to a computer of the cooperation destination network. . 14. The data conversion process includes a process of converting the transferred data into a data format and a data content for each computer of a network of a cooperation destination, wherein the data transfer process is performed by the data conversion process. 14. The storage medium storing the data cooperation program according to claim 13, including a process of transferring data to each computer on the network of the cooperation destination. 15. A load state sensing process for sensing a load state of the own computer; a load monitoring process for monitoring a load of a data cooperation function for each of the computers on the plurality of different networks; A conversion request process for requesting the computer to convert data; a data decompression process for decompressing archived data obtained from the conversion request destination computer when the load on the local computer is the least; a conversion request destination 15. A storage medium storing the data linkage program according to claim 14, further comprising: a linkage destination transfer process for transferring data acquired from the computer to the linkage destination. 16. A storage medium storing a data linking program mounted on a computer of a network in a high security data linking system in the mutual use of data between different communication networks, the load being a load for sensing a load state of its own computer. A sensing process, a conversion process that converts the data into a data format and data content suitable for the partner computer, an archiving process that archives the converted data, a transfer process that transfers the data, and the transferred data And a decompression process for decompressing the data. 17. The storage medium storing the data cooperation program according to claim 15, wherein the cooperation destination transfer process includes a process of archiving and transmitting the data.