JP2001265638A - Portable information terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable information terminal capable of effectively managing information with a small storage capacity while suppressing a communication cost, easily deciphering ciphered data without the need of complicated procedures or high throughput and easily maintaining the consistency of data. SOLUTION: Management data needed by a user at the time of carrying the terminal are transferred from a data management device 16 to this portable information terminal 20 through a second data communication means and kept in a data storage part 22 as terminal data. Then, other management data are transferred from the data management device 16 through a network 14 and a first data communication means to a server 11 and kept in the server 11 as server data. At the time of going out carrying the portable information terminal 20, the user refers to the terminal data of the data storage part 22, and in the case that the terminal data corresponding to the management data needed by the user are not present in the data storage part 22, they are replenished from the data management device 16 or the server 11 to the data storage part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable information terminal that performs data communication with a server on a network and performs data communication with a data management device capable of performing data communication with the server.

[0002]

2. Description of the Related Art Personally managed management data (address book, e-mail, documents, etc.) is stored in a personal computer (hereinafter referred to as a personal computer) in an office or home. This management data is stored in the management device, and it is desirable to copy these management data to the portable information terminal and to refer to and update the data even when going out. The capacity is limited, and it is not possible to store all management data stored by the user.

On the other hand, wireless data communication such as cellular telephone and PHS is possible even when going out, and a portable information terminal having this wireless data communication can perform data communication with a server on a network via the Internet or the like. . Therefore, as a portable information terminal, it has a data communication function with the server, and even if the data storage capacity is small, the data is stored separately in the portable information terminal and the server, and the data is stored as necessary. By obtaining
A device capable of handling a large amount of data has been proposed (JP-A-11-96117). However, when the device corresponding to the server of the portable information terminal is a personally owned personal computer, it is not always possible to always connect to the device managing the necessary data and to retrieve the data. In addition, the personal computer in the office or home, which is the data management device, is not turned on,
Connection to the network originated from the device (dial-up)
However, there is a problem that data cannot be directly extracted from the portable information terminal, and effective information management cannot be performed.

Further, it is conceivable to use a server on the network as a data storage, perform data communication with the server, and retrieve data as necessary. However, it is possible to reduce the amount of communication in terms of communication cost. There is a problem that is desired.

When data is stored in a server on a network, it is desirable to encrypt the data in terms of security. However, in a portable information terminal, a security method that is as simple as possible in terms of processing capability and the like is desired.

Further, when a copy of data is stored in a portable information terminal or a server on a network, the original management data is updated or deleted in the data management device, or the data copied in the portable information terminal is deleted. When updated or deleted, it is necessary to maintain consistency between the original management data and terminal data, but data communication is not always possible between the server, data management device, and portable information terminal. However, there is a problem that it is difficult to maintain data consistency.

An object of the present invention is to enable effective information management with a small storage capacity while suppressing communication costs.
A portable information terminal capable of easily decrypting encrypted data without requiring a user to remember a decryption key, requiring complicated procedures and high processing power, and easily maintaining data integrity. Is to provide.

[0008]

In order to achieve the above object, a portable information terminal according to the present invention comprises: first data communication means for performing data communication with a server on a network; A second data communication unit for performing data communication with the data management device without passing through the network; and transferring the management data of the data management device to the server via the network, and using the transferred management data as server data. Server data storage instructing means for instructing the data management device via the second data communication means to store the data in the server;
Management data retrieving means for retrieving the management data of the data management device via the second data communication means;
Terminal data storage means for storing management data extracted from the data management device by the management data extraction means as terminal data, and a server for extracting the server data stored in the server via the first data communication means When the terminal data corresponding to the management data required by the user is not present in the terminal data storage unit and the terminal device can communicate with the data management device via the second data communication unit, the management data Retrieving means retrieves the corresponding management data from the data management device via the second data communication means, and replenishes the retrieved management data as terminal data to the terminal data storage means. When communication is not possible via data communication means,
In addition, when the user has server data corresponding to the necessary management data in the server, the server data is retrieved from the server via the network and the first data communication means by the server data retrieval means and retrieved. Terminal data replenishment means for replenishing the terminal data storage means with server data as terminal data.

According to the portable information terminal having the above configuration, the server data storage instructing means transfers the management data of the data management device via the network (for example, the Internet connected using a fixed analog telephone, ISDN, or the like). The data management apparatus is instructed via the second data communication means to transfer the management data to the server as server data, and to store the transferred management data in the server as server data. The management data of the management device is fetched via a second data communication means (for example, a serial cable, a communication means using infrared rays) without passing through a network, and the management data fetching means extracts the second data communication from the data management device. The management data retrieved via the Stored as the terminal data to the storage means. At this time, the management data required by the user when carrying is stored as terminal data in the portable information terminal itself,
Other management data is stored as server data on a server on the network. When the terminal data corresponding to the management data required by the user is not present in the terminal data storage means, when the data management device can communicate with the data management apparatus via the second data communication means, the management data extraction means Then, the corresponding management data is extracted from the data management device via the second data communication unit, and the extracted management data is refilled as terminal data by the terminal data replenishment unit into the terminal data storage unit. On the other hand, for example,
When the portable information terminal is carried out and goes out, communication with the data management device via the second data communication means is not possible, and server data corresponding to management data required by the user is stored in the server. Is stored in the network (for example, a mobile phone, a PHS (Personal Handip
hone System: personal handyphone system)
And the server data is taken out from the server via the first data communication means connected thereto, and the taken out server data is supplemented as terminal data to the terminal data storage means by the terminal data supplementing means. In this way, the management data managed by the data management device in the office or home is distributed and stored in the portable information terminal itself and the server on the network, and even if communication with the data management device cannot be performed when going out, The information stored in the portable information terminal itself and the information of the server can be referred to, and effective information management can be performed while suppressing communication costs.

In one embodiment of the present invention, when the terminal data replenishment means refills the terminal data storage means with terminal data, the terminal information storage means does not have an empty area. Terminal data deletion means for selecting and deleting one or more terminal data satisfying a predetermined condition among the terminal data stored in the storage means, and terminal data stored in the terminal data storage means by the terminal data deletion means. When deleted, the server data storage instructing means transmits the management data corresponding to the deleted terminal data from the data management device to the server via the second data communication means so as to be stored as server data. The data management device is instructed by the instruction.

According to the portable information terminal of the above embodiment,
When refilling the terminal data storage means with the terminal data by the terminal data replenishment means, if the terminal data storage means does not have an empty area, the terminal data deletion means rewrites the terminal data stored in the terminal data storage means. One or more terminal data satisfying the predetermined condition (for example, terminal data with an old reference date) is selected and deleted, and an empty area for terminal data to be supplemented is prepared in the terminal data storage means. Then, when the terminal data deletion means deletes the terminal data of the terminal data storage means, the server data storage instruction means transfers management data corresponding to the deleted terminal data from the data management device to the server. The data management device is instructed via the second data communication means to store the data as server data. Therefore, the capacity of the terminal data storage means is small,
Even in the case where there is no empty area, the terminal data required by the user can be supplemented to the terminal data storage means by deleting the terminal data of low importance from the terminal data storage means. When the deleted terminal data of low importance becomes necessary, the server data extracting means extracts the corresponding server data from the server.

In one embodiment of the present invention, there is provided a portable information terminal in which terminal data corresponding to management data required by a user is not in the terminal data storage means, and the data management device and the second data communication means are not connected to each other. Communication is not possible via
When there is no server data corresponding to the management data required by the user in the server, the server has identifier storage means for storing an identifier of the management data that could not be retrieved, and the identifier of the management data that could not be retrieved by the identifier storage means. After the storage of the management data, the communication with the data management device becomes possible via the second data communication means. Based on the identifier of the management data stored in the identifier storage means, the management data that could not be extracted is stored in the management data. Fetched by the data fetching means via the second data communication means,
The retrieved management data is supplemented as terminal data to the terminal data storage means by the terminal data supplementing means.

According to the portable information terminal of the above embodiment,
The terminal data corresponding to the management data required by the user is not in the terminal data storage means, and communication with the data management device via the second data communication means is not possible, and the user has the necessary management data. If there is no server data corresponding to the data, the necessary management data cannot be referred to. At this time, the identifier of the management data that could not be extracted is stored in the identifier storage unit. Thereafter, when communication with the data management device becomes possible via the second data communication means, the management data which could not be taken out by the terminal data replenishment means is determined based on the identifier of the management data stored in the identifier storage means. The management data is taken out from the data management device by the management data take-out means, and the taken-out management data is supplemented to the terminal data storage means as terminal data. Therefore, when the management data requested by the user cannot be referred to, when the communication with the data management device becomes possible via the second data communication means, the requested management data is transferred from the data management device to the portable information. Can be imported to the terminal.

In one embodiment of the present invention, there is provided a portable information terminal in which terminal data corresponding to management data required by a user is not in the terminal data storage means, and the data management device and the second data communication means are not used. Communication is not possible via
When there is no server data corresponding to the management data required by the user in the server, the server has identifier storage means for storing an identifier of the management data that could not be retrieved, and the identifier of the management data that could not be retrieved by the identifier storage means. After the storage of the management data, the communication with the data management device via the second data communication means becomes possible. Based on the identifier of the management data stored in the identifier storage means, the management data that could not be retrieved is stored in the network. And instructing the data management device via the second data communication means by the server data storage instructing means to store the transferred management data as server data via the second data communication means. I have.

According to the portable information terminal of the above embodiment,
The terminal data corresponding to the management data required by the user is not in the terminal data storage means, and communication with the data management device via the second data communication means is not possible, and the user has the necessary management data. If there is no server data corresponding to the data, the necessary management data cannot be referred to. At this time, the identifier of the management data that could not be extracted is stored in the identifier storage unit. Thereafter, when communication with the data management device becomes possible via the second data communication means, the management data that could not be taken out is stored in the server via the network based on the identifier of the management data stored in the identifier storage means. The server data storage instructing means so as to store the transferred management data as server data.
An instruction is given to the data management device via the data communication means. By doing so, the next time the user requests the same management data, it can be retrieved from the server by the server data retrieval means and referenced.

In one embodiment, the portable information terminal encrypts the management data transferred from the data management device to the server via the network in accordance with an instruction from the server data storage instruction means. (2) Encryption instruction means for instructing the data management device via data communication means, and decryption key storage means for storing a decryption key for decrypting server data encrypted by the data management device and stored in the server And decryption means for decrypting the server data retrieved from the server via the first data communication means by the server data retrieval means with the decryption key stored in the decryption key storage means. It is characterized by:

According to the portable information terminal of the above embodiment,
When the data is transferred from the data management device to the server via the network by the instruction of the server data storage instruction means, the encryption instruction means transmits the second data communication means via the second data communication means so as to encrypt the management data. Instruct the data management device. The management data thus encrypted is stored in the server as server data. Then, the decryption key for decrypting the server data encrypted by the data management device and stored in the server is stored in the decryption key storage unit, and the decryption key stored in the decryption key storage unit is stored in the decryption key storage unit. On the basis of,
The server data retrieved from the server by the server data retrieval means via the first data communication means is decrypted by the decryption means. Therefore, the decryption key is directly taken into the portable information terminal by using the second data communication means without passing through an external network such as the Internet, and is stored in the decryption key storage means.
A conventional cryptosystem (common key cryptosystem) can be used, and the user can decrypt with a simple cryptosystem with a low decryption processing load without creating or remembering a decryption key.

Further, in the portable information terminal of one embodiment, when the management data is updated in the data management device, the management information of the data management device is updated via the second data communication means. Management data update confirmation means for confirming, and when the server has server data corresponding to the management data updated by the data management device, the data management device updates the server data so as to update the server data. Server data update instructing means for instructing via the server, and when terminal data corresponding to the management data updated by the data management device is in the terminal data storage means, the updated management data is read by the management data extracting means. Retrieving via the second data communication means and updating terminal data corresponding to the retrieved management data It is characterized by having a terminal data updating means.

According to the portable information terminal of the above embodiment,
When the management data is updated in the data management device, the management data update confirmation unit confirms that the management data of the data management device has been updated via the second data communication unit. Note that "update" means a change in the content of already registered data, and "additional registration"
Means that new data is additionally registered. When the server data corresponding to the management data updated by the data management device is present in the server, the data management device updates the server data corresponding to the updated management data by the server data update instruction means. Via the second data communication means. Further, when terminal data corresponding to the management data updated by the data management device is in the terminal data storage means,
The updated management data is fetched by the management data fetching means via the second data communication means, and terminal data corresponding to the fetched management data is updated by the terminal data updating means. By doing so, when the management data is updated by the data management device, the management data stored in the data management device, the server data stored in the server, and the management data stored in the terminal data storage means of the portable information terminal are stored. Terminal data consistency can be maintained.

In one embodiment, when the management data is deleted in the data management device, the portable information terminal notifies the data management device that the management data has been deleted via the second data communication means. When the server has server data corresponding to the management data whose deletion has been confirmed by the management data deletion confirming means to be confirmed and the management data deletion confirming means, the server data corresponding to the management data is deleted. Server data deletion instructing means for instructing the data management device via the second data communication means, and terminal data corresponding to the management data confirmed to be deleted by the management data deletion confirming means in the terminal data storage means. Deletes terminal data corresponding to the management data from the terminal data storage means. It is characterized by having a stage.

According to the portable information terminal of the above embodiment,
When the management data is deleted in the data management device, the management data deletion confirmation unit confirms that the management data has been deleted in the data management device via the second data communication unit. Then, when server data corresponding to the management data confirmed to be deleted by the management data deletion confirmation means is present in the server, the server data deletion instructing means deletes the server data corresponding to the management data. Via the first data communication means. Further, when the terminal data corresponding to the management data confirmed to be deleted by the management data deletion confirming means is present in the terminal data storage means, the terminal data corresponding to the management data is stored in the terminal data deleting means by the terminal data deleting means. Delete from data storage means. By doing so, when the management data is deleted by the data management device, the management data stored in the data management device is matched with the server data stored in the server and the terminal data stored in the terminal data storage means. Sex can be maintained.

In the portable information terminal of one embodiment, when the portable information terminal updates the terminal data stored in the terminal data storage means, the updated terminal data of the terminal data storage means The data management device sends the new data to the data management device via the second data communication means, and updates the management data of the data management device corresponding to the updated terminal data. It is characterized by having management data update instructing means for instructing via a communication means.

According to the portable information terminal of the above embodiment,
In this portable information terminal, when the terminal data stored in the terminal data storage means is updated, new contents of the updated terminal data in the terminal data storage means are sent to the data management device via the second data communication means. The management data update instructing means instructs the data management apparatus via the second data communication means to update the management data of the data management apparatus corresponding to the updated terminal data. By doing so, when the terminal data is updated in the portable information terminal, consistency between the management data of the data management device and the terminal data of the portable information terminal can be maintained.

In one embodiment, the portable information terminal further includes a terminal data additional registration unit for additionally registering new terminal data in the terminal data storage unit, and the terminal data additionally registered in the terminal data storage unit. The second data communication means is sent to the data management device via the second data communication means, and the transmitted terminal data is additionally registered as management data.
And a management data additional registration instructing means for instructing the data management apparatus via the data communication means.

According to the portable information terminal of the above embodiment,
When new terminal data is additionally registered in the terminal data storage means by the terminal data additional registration means, the terminal data additionally registered in the terminal data storage means is sent to the data management device via the second data communication means and sent. The management data addition registration instructing means instructs the data management apparatus via the second data communication means to additionally register the terminal data as management data. By doing so, when new terminal data is additionally registered in the portable information terminal, consistency between the management data of the data management device and the terminal data of the terminal data storage means of the portable information terminal can be maintained. .

In one embodiment of the present invention, when the terminal data additional registration means registers new terminal data in the terminal data storage means, the portable information terminal stores the new terminal data in the terminal data storage means. Terminal data deleting means for selecting and deleting one or more terminal data satisfying a predetermined condition among the terminal data stored in the terminal data storage means when there is no empty area for additional registration; In the case where new terminal data is additionally registered in the terminal data storage means by the terminal data additional registration means, when the terminal data is deleted by the terminal data deletion means, the server data storage instructing means outputs the deleted terminal data. The management data corresponding to the above is transferred from the data management device to the server and stored as server data. It is characterized in that instructs the data management device via the data communication means.

According to the portable information terminal of the above embodiment,
When additionally registering new terminal data in the terminal data storage means by the terminal data additional registration means, if there is no empty area for additionally registering new terminal data in the terminal data storage means, the terminal data deletion means Selects and deletes one or more terminal data (for example, terminal data with an old reference date) satisfying a predetermined condition from among the terminal data stored in the terminal data storage unit, and adds the terminal data to the terminal data storage unit. Prepare an empty area for terminal data to be registered. Then, when the terminal data deletion means deletes the terminal data of the terminal data storage means, the server data storage instruction means transfers management data corresponding to the deleted terminal data from the data management device to the server. And store it as server data,
An instruction is given to the data management device via the second data communication means. Therefore, even if the capacity of the terminal data storage means is small and there is no empty area, the terminal data of low importance is deleted from the terminal data storage means and stored in the server, so that the deleted terminal data is fetched from the server. Can be referenced. When the deleted terminal data of low importance becomes necessary, the server data extracting means extracts the corresponding server data from the server.

Further, in the portable information terminal of one embodiment, the terminal data deleting means for deleting the terminal data of the terminal data storing means, and the terminal data of the terminal data storing means are deleted by the terminal data deleting means. At this time, the management data deletion instructing means instructing the data management apparatus via the second data communication means to delete the management data corresponding to the deleted terminal data, and the management data deletion instructing means deletes the management data. When the server data corresponding to the specified management data is present in the server, the server data instructing the data management device via the second data communication means to delete the server data corresponding to the management data. And a deletion instruction means.

According to the portable information terminal of the above embodiment,
When the terminal data of the terminal data storage unit is deleted by the terminal data deletion unit on the portable information terminal side,
The management data deletion instructing means instructs the data management device via the second data communication means to delete the management data corresponding to the deleted terminal data. Also, when server data corresponding to the deleted terminal data is present in the server, the server data deletion instructing means instructs the data management apparatus to delete the server data corresponding to the deleted terminal data.
Instruction is given via data communication means. By doing so, when a part of the terminal data is deleted in the portable information terminal, the management data stored in the data management device, the server data stored in the server, and the terminal data stored in the terminal data storage means. Terminal data consistency can be maintained.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a portable information terminal according to the present invention will be described in detail with reference to the illustrated embodiments.

(First Embodiment) FIG. 1 is an overall configuration diagram of a system using a portable information terminal according to a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a server, 12 denotes a data storage unit of the server 11, 13 denotes a communication line having one end connected to the server 11, 14 denotes a network connected to the other end of the communication line 13, and 15 denotes the network. A communication line having one end connected to 14; a data management device 16 such as a personal computer connected to the other end of the communication line 15;
Reference numeral 17 denotes a data storage unit for storing management data (address book, e-mail, documents, etc.) of the data management device 16;
Is a portable information terminal connected to the network 14 and the data management device 16. The above portable information terminal 2
0 is a data storage unit 22 for storing terminal data and the like.
have.

As shown in FIG. 1, the server 11 on the network 14 creates dedicated data management software,
Implement a service using it, or use an existing e-mail service
By using a protocol such as (rotocol) 4, it is possible to manage data. That is, the management and operation of data can be substituted by searching for a message, reading a message, transmitting a message, and deleting a message in the electronic mail service. The data management device 16 and the server 11
In the data communication with the data communication line 13,
15 and data communication via the network 14 to create dedicated communication software and implement it, or use the existing e-mail service mechanism as described above to transfer messages, ie, data. , Can be deleted.

FIG. 2 shows a configuration diagram of the portable information terminal 20. The portable information terminal 20 includes a control device 21 for controlling the entire portable information terminal 20 such as writing and transfer instructions. Data storage unit 22 as terminal data storage means for storing terminal data and the like of the control device 21
And the server 1 on the network 14 (shown in FIG. 1)
1, a second data communication unit 24 for performing data communication with the data management device 16, and a display for displaying the contents of the terminal data stored in the data storage unit 22. It has a unit 25 and an input operation unit 26 into which a user's request or the like is input. The second
The data communication means 24 is a short-distance communication means using a serial cable or infrared ray used for data communication with the data management device 16 when the user is at home, and has no communication cost.
Further, the first data communication unit 23 is connected to the server 1 when going out.
1 and data communication via a mobile phone, PHS, or the like.

The control section 21 comprises a microcomputer, an input / output circuit, and the like, and includes server data storage instructing means 31 for instructing transfer of management data from the data management device 16 to the server 11 in response to a user's request. Management data retrieving means 32 for retrieving management data from the data management device 16 in response to a user request, and server data retrieving means 33 for retrieving data from the server 11
And a terminal data replenishing unit 34 for replenishing the data storage unit 22 with terminal data, and a terminal data deleting unit 35 for deleting terminal data in the data storage unit 22. The management data extracted from the data management device 16 via the second data communication unit 24 by the management data extraction unit 32 is stored in the data storage unit 22 as terminal data. Note that 36 to 47 of the control device 21 shown in FIG. 2 are used in the third to seventh embodiments.
It will not be described in the embodiment.

In the system using the portable information terminal 20 having the above-described configuration, the user usually uses the data management device 16 (a personal computer or the like) to create management data managed by the user at home or the like. Update, delete, etc.
The data management device 16 is connected to a network 14 such as the Internet using a dial-up line or the like in an emergency, and the server 11 on the network 14 is connected to the data management device 16.
And data communication is possible. And when you go out,
The management data is referenced using the portable information terminal 20.

In the first embodiment, the data management device 1
The management data managed in 6 is, as shown in FIG.
For example, a table A including “subject” and “content” will be described. The terminal data copied to the portable information terminal 20 is, as shown in FIG. 4, a table B including “subject”, “content”, and “reference date”.

First, when the user is at home, the means for directly communicating with the data management device 16 (that is, the second data communication means 24 at a short distance) is possible, and the portable information terminal 20 By selecting the management data to be referred to in advance, the management data of the data management device 16 is stored in the portable information terminal 20 as the duplicated terminal data, and the other management whose duplicate is not stored in the portable information terminal 20 is stored. The data is stored in the server 11 as duplicated server data.

FIGS. 5 and 6 show a control flow when communication with the data management device 16 by the second data communication means 24 of the portable information terminal 20 is possible. 7 and 8 show that the second data communication means 24 becomes unusable when the user goes out, but the control is usually performed when communication with the server 11 is possible using the first data communication means 23 of the portable information terminal 20. 4 shows a flow. Using the control flows of FIGS. 5 to 8, the entire portable information terminal 20 is controlled by the control flow of FIG. 9.

First, in FIG. 9, in step S41, a data reference request from the user is waited. Next, the input operation unit 2
If there is a data reference request from the user in step 6, step S
Proceeding to 42, it is determined whether or not the second data communication means 24 is available. If it is determined that the second data communication means 24 is available, the procedure proceeds to step S43, while the second data communication means 24 is used. If it is determined that it is not possible, step
Proceed to S44. Then, in step S43, a control flow of terminal data storage processing 1 (shown in FIGS. 5 and 6) for fetching necessary data from the data management device 16 is executed. In step S44, a terminal for fetching necessary data from the server 11 is executed. The control flow of data storage processing 2 (shown in FIGS. 7 and 8) is executed.

[Terminal Data Storage Process 1] In FIG. 5, the maximum number of data that can be stored in the data storage unit 22 of the portable information terminal 20 is NMAX, and the table B having the structure shown in FIG. It is assumed that the current number N of terminal data is stored in the table B.

When the user makes a reference request for the data, the subject of the data is stored in the variable a. First, it is determined whether or not there is terminal data corresponding to the subject of the data in the table B of the portable information terminal 20. to decide.

If the terminal data exists in the data storage unit 22 of the portable information terminal 20, the reference date of the terminal data is updated, the content of the terminal data is displayed on the display unit 25, and the process is terminated.

On the other hand, when there is no terminal data in the data storage unit 22 of the portable information terminal 20 and there is a free space in the table B, the management data is read from the data management device 16 by the management data extracting means 32, and the read management data Table B in the data storage unit 22 using data as terminal data
Keep in. On the other hand, when there is no free space in the table B of the data storage unit 22, the one with the oldest reference date is selected and deleted, and the deleted terminal data is sent from the data management device 16 to the server 11 by the server data storage instruction means 31.
And instructs to store the transferred terminal data as server data.

Thereafter, the requested data is read from the data management device 16 by the management data extracting means 32, and
The data is stored in the table B and the contents of the data are displayed on the display unit 2.
5 and the process ends.

The terminal data storage processing 1 of the portable information terminal 20 will be described below with reference to FIGS. First,
When the user makes a reference request for terminal data in step S1 shown in FIG. 5, the subject of the terminal data is stored in a variable a. Next, in step S2, i is set to zero, and in step S2
At 3, it is determined whether or not i is less than the current number N. That is, it is determined whether or not the terminal data is present in table B in portable information terminal 20. Then, in step S2, i
Is smaller than the current number N, step S4
To determine whether the subject of table B [i] is a.
If it is determined in step S4 that the subject of table B [i] is a, the process proceeds to step S10 in FIG. 6, while if it is determined that the subject of table B [i] is not a, i is determined in step S5.
And returns to step S3 (tables B [0] to B [N-1]
Find out the subject). On the other hand, if it is determined in step S3 that i is equal to or greater than the current number N, the process proceeds to step S6, where it is determined whether the current number N is equal to or greater than the maximum number NMAX. If it is determined that there is, the process proceeds to step S7 shown in FIG.
Is greater than or equal to the maximum number NMAX, that is, if it is determined that there is no empty area in the table B, step S1
Proceed to 2.

Then, in step S7 shown in FIG. 6, i is set to the current number N, and the flow advances to step S8 to increment the current number N by +1. Next, proceeding to step S9, the content of the subject a is stored in the data management device 1 by the management data retrieving means 32.
6, and the extracted management data is stored in the table B [i] as terminal data. Next, in step S10, after setting the current time to the reference date of table B [i],
Proceeding to step S11, the contents of table B [i] are displayed. On the other hand, in step S12, i, j, k are set to zero, the process proceeds to step S13, and it is determined whether or not i is less than the current number N. When it is determined that i is less than the current number N, On the other hand, if it is determined that i is equal to or greater than the current number N, the process proceeds to step S17. Then, in step S14, it is determined whether or not k exceeds the reference date of the table B [i]. If it is determined that k exceeds the reference date of the table B [i], the process proceeds to step S15. If it is determined that the date is less than or equal to the reference date of B [i], step S15 is skipped and the process proceeds to step S16. next,
After setting i to j in step S15 and setting the reference date of the table B [i] to k, add +1 to i in step S16, and then return to step S13. In step S17, the subject in the management data of the data management device 16 is set to the table B [j].
The management data identical to the subject is transferred to the server 11 to support the storage. Then, the process proceeds to step S18, where i is j.
After setting, the process proceeds to step S9 in FIG.

[Terminal data storage processing 2] Further, when the second data communication means 24 is unavailable, when the user makes a reference request for the data, the subject of the data is put in a variable a. It is determined whether or not the data storage unit 22 in the terminal 20 has the terminal data. If the terminal data exists, the reference date of the terminal data is updated, the content of the terminal data is displayed on the display unit 25, and the process ends.

When terminal data is not found in table B of portable information terminal 20, data communication with server 11 is possible using first data communication means 23, and
When server data is stored in the server 11,
The server data is extracted from the server 11 by the server data extracting means 33, and the extracted server data is stored in the table B as terminal data. At this time, it is determined whether or not there is a space in the table B in the portable information terminal 20. If there is no space, the data with the oldest reference date is selected and deleted by the terminal data deletion means 35, and the data is deleted. The terminal data transferred to the server 11 by the server data registration instructing means 46, and
To make room.

Hereinafter, the terminal data storage processing 2 of the portable information terminal 20 will be described with reference to FIGS. First, after the subject is input to the variable a in step S21 shown in FIG. 7, i is set to zero in step S22. Next, in step S23, it is determined whether or not i is less than the current number N. If it is determined that i is less than the current number N, the process proceeds to step S24, and the subject of the table B [i] is a. It is determined whether or not. If it is determined that the subject of table B [i] is a, the process proceeds to step S31 in FIG. 8, while if it is determined that the subject of table B [i] is not a, i is incremented by 1 and the process returns to step S23. (Check the subjects of tables B [0] to B [N-1]). On the other hand, in step S23, i is the current number N
If it is determined that the above is the case, the process proceeds to step S26, where communication with the server 11 is possible and the subject a
It is determined whether or not the data is stored. And
In step S26, it is possible to communicate with server 11 and server 1
If it is determined that the data of the subject a is stored in the one data, the process proceeds to step S27, and it is determined whether the current number N is equal to or greater than the maximum number NMAX. If it is determined in step S27 that the current number N is equal to or greater than the maximum number NMAX, that is, if it is determined that there is no empty area in the table B,
Proceeding to step S33, i, j, k are set to zero, and it is determined in step S34 whether i is less than the current number N.
If it is determined in step S34 that i is smaller than the current number N, the process proceeds to step S35. If it is determined that i is equal to or greater than the current number N, the process proceeds to step S38.
Next, in step S35, it is determined whether or not k exceeds the reference date of the table B [i]. If it is determined that k exceeds the reference date of the table B [i], the process proceeds to step S36.
If k determines that the reference date of the table B [i] is the following, the process skips step S36 and proceeds to step S37. Then, after setting i to j in step S36, +1 is added to i in step S37, and the process returns to step S34. on the other hand,
When the same data as the table B [j] does not exist in the server 11 in step S38, the table B [j] is transferred to the server 11 and the storage is instructed. Next, the process proceeds to step S39, where i
Is set to j, and the process proceeds to step S30 in FIG.

On the other hand, if it is determined in step S27 that the current number N is less than the maximum number NMAX, the process proceeds to step S28 shown in FIG. 8, where the current number N is set in i, and the current number N is set in step S29. +1. Next, step S
At 30, the contents of the subject a are read from the server 11 and stored in the contents of the table B [i]. Next, the process proceeds to step S31, where the current time is set to the reference date of the table B [i], and then the process proceeds to step S32, where the contents of B [i] are displayed.

As described above, the management data managed by the data management device 16 in the office or home is distributed and stored in the portable information terminal 20 itself and the server 11 on the network 14, and is stored in the data management device 16 when going out. Even if the communication cannot be performed, the information stored in the portable information terminal 20 itself and the information of the server can be referred to, and effective information management can be performed while suppressing communication costs.

Further, even when the storage capacity of the data storage unit 22 as the terminal data storage means is small and there is no empty area,
By deleting the terminal data of low importance from the data storage unit 22, the terminal data required by the user can be supplemented to the data storage unit 22.

(Second Embodiment) In a portable information terminal according to a second embodiment of the present invention, a diagram for recording the subject of the data that could not be taken out in step S40 of the control flow shown in FIG. A control flow indicated by 11 is added. FIG. 10 shows the structure of a table C as an identifier storage unit for recording a subject. The system using the portable information terminal of the second embodiment is
It has the same configuration as the system and the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit, and FIG. 2 is referred to.

In FIG. 11, m is set to zero in step S51. Next, in step S52, it is determined whether or not m is equal to or more than M (the number of data that could not be extracted).
If it is determined that this is the case, the process proceeds to step S53,
If it is determined that m is less than M, the process proceeds to step S55.
Then, in step S53, the subject a is set in the table C [m], and then the process proceeds to step S54, where M is incremented by one, and the process ends. In step S55, table C
It is determined whether or not the content of [m] is the subject a, and if it is determined that the content of the table C [m] is the subject a, the process proceeds to step S54, while the content of the table C [m] is not the subject a. If it is determined, the process proceeds to step S56, m is incremented by 1, and step S
Return to 52.

The table C is recorded as a table in the data storage unit 22 of the portable information terminal 20. FIG.
M represents the number of data that could not be extracted, and the initial value is 0. Further, when communication becomes possible via the second data communication means 24 with the data management device 16 using the flow shown in FIG. 12, data is copied.

In FIG. 12, m is set to zero in step S61, and it is determined whether or not m is less than M in step S62. If it is determined that m is less than M, the process proceeds to step S63, while m is equal to or more than M. If it is determined that
Then, m is set to zero, and this process ends. In step S63, the contents of the table C [m] are set in the variable a, and the process proceeds to step S64, except for step S1 of the processing shown in FIGS. 5 and 6 [terminal data storage processing 1].
I do. Then, the process proceeds to step S65, m is incremented by 1, and the process returns to step S62.

FIG. 13 shows an overall control flow.
In FIG. 13, in step S71, a data reference request from the user is waited with a timeout. Then, when there is a data reference request from the user or when a timeout occurs, the process proceeds to step S72, and it is determined whether a timeout has occurred. If it is determined in step S72 that a time-out has occurred, the process proceeds to step S73 to determine whether the second data communication unit 24 is available. If it is determined in step S73 that the second data communication means 24 is available, the process proceeds to step S74,
If it is determined that the second data communication unit 24 is not available, the process returns to step S71. Then, in step S74, the process shown in FIG.
I do. On the other hand, if it is determined in step S72 that the timeout has not occurred, the process proceeds to step S75, and it is determined whether the second data communication unit 24 is available. And
If it is determined in step S75 that the second data communication means 24 is available, the flow advances to step S76 to execute the control flow of [terminal data storage processing 1]. On the other hand, if it is determined in step S75 that the second data communication means 24 is not available, the process proceeds to step S77, in which the control flow of [processing for obtaining the number of unretrievable data] shown in FIG. 2) The control flow is executed.

Therefore, the management data requested by the user
If the (terminal data) cannot be referred to, the data management device 1
When the communication becomes possible with the mobile information terminal 20 via the second data communication means 24, the requested management data can be taken into the portable information terminal 20 from the data management device 16.

In the second embodiment, the management data that cannot be referred to is taken in after the communication is enabled. However, the management data that cannot be referred to is stored in the server 11 as server data by the server data storage instructing means 31. Good.

(Third Embodiment) A portable information terminal according to a third embodiment of the present invention handles data encrypted by the data management device 16. The system using the portable information terminal according to the third embodiment has the same configuration as the system and the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit, and FIG. 2 is referred to.

In the third embodiment, the data management device 1
In step 6, a key required for encryption is created in advance by using a random number or the like. When the portable data terminal 20 instructs the server data storage instructing means 31 to transfer the management data from the data management device 16 to the server 11, it instructs the encryption instructing means 36 to encrypt the management data. When the portable information terminal 20 becomes communicable by the second data communication means 24, the portable information terminal 2
0, a decryption key for decrypting the encrypted data is taken out, and the data storage unit 2 of the portable information terminal 20 is retrieved.
2 (Decryption key storage means). The encrypted server data extracted from the server 11 via the first data communication unit 23 by the server data extraction unit 33 is decrypted by the decryption unit 38 into the data storage unit 22.
(Decryption key storage means) Decrypt with the decryption key stored.

When the data is to be transferred to the server 11 in step S17 of the control flow shown in FIG. 5, the data management device 16 instructs to transfer the encrypted data to the server 11 after encrypting the data using the key. Add instructions to Further, step S38 of the control flow of FIG.
Does not instruct the server 11 to transfer data. In step S30 of the control flow in FIG. 8, a command for decrypting the server data extracted from the server 11 with the decryption key is added.

Therefore, the second data communication means 2 is directly connected without passing through an external network 14 such as the Internet.
4, the decryption key is taken into the portable information terminal 20,
By storing the decryption key in the data storage unit 22 as a decryption key storage means, a conventional cryptosystem (common key cryptosystem) can be used, and the decryption processing load can be reduced without the user having to create or remember the decryption key. Can be decrypted by a simple encryption method with a small number of bits.

(Fourth Embodiment) In the portable information terminal according to the fourth embodiment of the present invention, when the management data of the data management device 16 is updated, the terminal data is also updated. The system using the portable information terminal according to the fourth embodiment is as follows.
It has the same configuration as the system using the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit, and FIG. 2 is referred to.

In the fourth embodiment, the data management device 1
When the management data already registered in 6 is updated,
The update flag of the management data shown in FIG. 3 is set to true. The basic part of the control flow of the portable information terminal 20 uses FIG. 5 and FIG. In addition, when the second data communication means 24 of the portable information terminal 20 becomes available and data communication with the data management device 16 becomes possible, the subject of the data whose update flag is true is listed up. Then, the management data update confirmation means 39 confirms whether or not there is terminal data in the table B of the data storage unit 22. When the terminal data is in the table B of the data storage unit 22, the data management device 16 (2) The data is extracted by the management data extracting means 32 via the data communication means 24, and the corresponding terminal data in the table B of the data storage unit 22 is updated by the terminal data updating means 41. Similarly, the subject is listed for the data for which the update flag is true, and an inquiry is made as to whether or not the data is duplicated on the server 11. If there is server data, the server data update instructing means 40 sends the management data to the server 11. To the server 11 and instructs the data management device 16 to update the server data. Thereafter, the update flag of the data management device 16 is set to false.

As described above, when the management data is updated in the data management device 16, the data management device 1
6 and the server data stored in the server 11 and the terminal data stored in the data storage unit 22 of the portable information terminal 20.

(Fifth Embodiment) In the fifth embodiment,
It is possible to update the terminal data copied in the table of the data storage unit 22 on the portable information terminal 20 side. The system using the portable information terminal according to the fifth embodiment has the same configuration as the system using the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit.
Invite.

When the terminal data is updated in the portable information terminal 20, the flag of the table D of the terminal data shown in FIG. 14 is set to true. Then, the new content of the updated terminal data is sent to the data management device 16 via the second data communication means 24, and the management data is updated so that the management data of the data management device 16 corresponding to the updated terminal data is updated. The update instruction means 42 gives the data management device 16 a second
An instruction is given via the data communication means 24.

When the second data communication means 24 becomes available, the updated contents of the terminal data are written into the table A of the data management device 16 and the terminal data of the portable information terminal 20 shown in FIG. A control flow for setting the flag of the table D to false is added to the control flow of FIG. 5 and the control flow of FIG.

Therefore, when terminal data is updated in the portable information terminal 20, the data management device 16
Of the portable information terminal 20 can be kept consistent with the management data of the portable information terminal 20.

(Sixth Embodiment) In the sixth embodiment,
Data can be added to the portable information terminal 20. In addition,
The system using the portable information terminal according to the fifth embodiment has the same configuration as the system using the portable information terminal shown in FIG. 1, and FIG. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit, and FIG. 2 is referred to.

FIG. 15 shows a control flow when the portable information terminal 20 adds new terminal data to the table D (shown in FIG. 14) by the terminal data addition / registration means 43. The flag is set to true for the data added to the terminal data table D shown in FIG. When communication with the data management device 16 via the second data communication means 24 becomes possible, the same processing as the data update of the fifth embodiment is performed, and the management data additional registration instruction means 44 Instructing the data management device 16 via the second data communication means 24 to send data to the management device 16 and additionally register the sent terminal data as management data. In FIG. Is set, and the content of data is set in the variable b.
Next, in step S82, the current number N is set to the maximum number NMA.
X to determine whether the current number N is the maximum number NM
If it is determined that the current number N is not less than AX, the process proceeds to step S87. If it is determined that the current number N is less than the maximum number NMAX, the process proceeds to step S83, where i is set to the current number N. N is incremented by 1, and the process proceeds to step S85. On the other hand, in step S87, i, j, k
Is set to zero, and it is determined in step S88 whether or not i is less than the current number N. If it is determined in step S88 that i is less than the current number N, the flow advances to step S89 to determine whether or not k exceeds the reference date of the table B [i]. Is determined to exceed the reference date, the process proceeds to step S90, while k
If it is determined that the date is less than or equal to the reference date of [i], step S90
And skips to step S91. Then, i is incremented by 1 in step S91, and the process returns to step S88. On the other hand, if it is determined in step S88 that i is equal to or more than the current number N, the process proceeds to step S92, and if the server 11 does not have the same data as the table B [j], the table B [j] Is transferred to the server 11 and storage is instructed. Then, the process proceeds to step S93,
j is set to i, and the process proceeds to step S85. Next, in step S85, a is set to the subject of table B [i], and b is set to the subject of table B [i]. Then, in step S86, the current date (including time) is set as the reference date of the table B [i], and this processing ends. At this time, the data management device 16 does not update the already registered terminal data, but additionally registers new terminal data.

FIG. 16 shows an overall control flow of the portable information terminal 20. In FIG. 16, step S101
Waits for a request from the user with a timeout. Then, when there is a request from the user or when a timeout occurs, the process proceeds to step S102, and it is determined whether a timeout has occurred. If it is determined in step S102 that a timeout has occurred, the process proceeds to step S103.
Proceed to. Then, in step S103, it is determined whether or not the second data communication unit 24 is available. If it is determined that the second data communication unit 24 is available, step S104 is performed.
On the other hand, if it is determined that the second data communication unit 24 is not available, the process returns to step S101. Meanwhile, step
If it is determined in S102 that a timeout has not occurred, the process proceeds to step S105, and it is determined whether the request is a new data addition request. If it is determined in step S105 that the request is a new data addition request, the flow advances to step S106 to execute the control flow of [data addition processing] shown in FIG. On the other hand, if it is determined in step S105 that the request is not a new data addition request, the flow advances to step S107 to determine whether or not the second data communication unit 24 is available, and to determine that the second data communication unit 24 is available. , Step
Proceeding to S108, the control flow of [terminal data storage processing 1] shown in FIGS. 5 and 6 is executed, and the process returns to step S101.
If it is determined in step S107 that the second data communication unit 24 is not available, the process proceeds to step S109,
The control flow of [terminal data storage processing 2] shown in FIGS. 7 and 8 is executed, and the process returns to step S101.

As described above, when new terminal data is additionally registered in the portable information terminal 20, it is possible to maintain the consistency of each data of the data management device 16, the server 11, and the portable information terminal 20.

(Seventh Embodiment) In a portable information terminal according to a seventh embodiment of the present invention, when data in a data management device is deleted, if data is deleted from table A shown in FIG. Accordingly, the data of the data management device, the server and the portable information terminal are made consistent. The system using the portable information terminal according to the fifth embodiment has the same configuration as the system and the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as the portable information terminal shown in FIG. 2 except for the control unit, and FIG. 2 is referred to.

The basic part of the control flow of the portable information terminal 20 uses FIGS. In addition, the portable information terminal 2
0 when the second data communication means 24 becomes available and data communication with the data management device 16 becomes possible.
The subject of the terminal data stored in the portable information terminal 20 is listed up, and the management data deletion confirmation unit 45 confirms the existence of the original management data in the data management device 16. When a part of the management data serving as the base of the data management device 16 is deleted and does not exist, the terminal data deletion unit 35 deletes the terminal data in the data storage unit 22. Similarly, it instructs the server data stored in the server 11 to list the subject, and confirms the existence of the original management data to the data management device 16. Further, when the original management data does not exist in the data management device 16, the data management device 16 instructs the data management device 16 to delete the server data stored in the server 11 by the server data deletion instructing means 46.
Is instructed via the data communication means 24.

As described above, when the management data is deleted by the data management device 16, the data of the data management device 16, the server 11, and the portable information terminal 20 can be kept consistent.

(Eighth Embodiment) In a portable information terminal according to an eighth embodiment of the present invention, when terminal data is deleted in the portable information terminal, a data management device,
The consistency of each data of the server and the portable information terminal is taken. The system using the portable information terminal according to the fifth embodiment has the same configuration as the system and the portable information terminal shown in FIG. 1, and FIG. 1 is referred to. The portable information terminal according to the second embodiment has the same configuration as that of FIG.
2 has the same configuration as the portable information terminal shown in FIG.

Data storage unit 2 of portable information terminal 20
When a part of the terminal data is deleted by the terminal data deletion unit 35 and does not exist, the corresponding management data of the data management device 16 is deleted by the management data deletion instruction unit 47. Similarly, when the server data corresponding to the deleted terminal data is present in the server 11, the data management device 16 causes the data management device 16 to delete the server data stored in the server 11 by the server data deletion instructing means 46. Is instructed via the data communication means 24.

As described above, when the terminal data is deleted in the portable information terminal 20, the data management device 1
6. The consistency of each data of the server 11 and the portable information terminal 20 can be maintained.

[0081]

As is clear from the above, according to the portable information terminal of the present invention, the data used when going out is copied to the portable information terminal as needed or copied to a server on the network. By doing so, it is possible to refer to or update or add data when the user goes out of the terminal to a capacity larger than the capacity that can be stored in the terminal. Therefore, effective information management can be performed while suppressing communication costs. In addition, by duplicating data directly from the data management device to the portable information terminal, copying data that cannot be stored to the server, and distributing and storing data necessary for going out to the portable information terminal and server by controlling In addition, it is possible to eliminate the shortage of the capacity of the portable information terminal while suppressing the communication cost.
In addition, it is not necessary to put a data management device such as a personal computer at an office or home in a standby state for an external connection, thereby saving power and preventing a danger of malicious intrusion into the data management device. it can.

Further, the user does not need to create or memorize the decryption key, and does not transmit the decryption key via the public network, so that there is no danger of others being known. Also,
A conventional cryptosystem (common key cryptosystem) that is simpler and has a lower decryption processing load than the public cryptosystem can be used.

Further, when the management data is updated / deleted by the data management device, or when the management data is updated / additionally registered / deleted by the portable information terminal, the data management device and the server and the portable information terminal The consistency of each data stored in the terminal can be maintained.

[Brief description of the drawings]

FIG. 1 is an overall view of a system using a portable information terminal according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of the portable information terminal.

FIG. 3 is a diagram showing a data structure in the data management device.

FIG. 4 is a diagram showing a data structure in the portable information terminal.

FIG. 5 is a flowchart of a part of a control flow of the portable information terminal.

FIG. 6 is a flowchart following FIG. 5;

FIG. 7 is a flowchart of a part of a control flow of the portable information terminal.

FIG. 8 is a flowchart following FIG. 7;

FIG. 9 is a flowchart showing an overall control flow of the portable information terminal.

FIG. 10 is a diagram showing a structure of a table for recording a subject.

FIG. 11 is a flowchart showing a part of a control flow of the portable information terminal according to the second embodiment of the present invention.

FIG. 12 is a flowchart illustrating a part of a control flow of a process of storing data that cannot be extracted.

FIG. 13 is a flowchart showing an overall control flow of the portable information terminal.

FIG. 14 is a diagram showing a data structure of a portable information terminal according to a fifth embodiment of the present invention.

FIG. 15 is a flowchart showing a part of a control flow of the portable information terminal according to the sixth embodiment of the present invention.

FIG. 16 is a flowchart showing an overall control flow of the portable information terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Server, 12 ... Data storage part, 13 ... Communication line, 14 ... Network, 15 ... Communication line, 16 ... Data management device, 17 ... Data storage part, 20 ... Portable information terminal, 21 ... Control part, 22 ... Data storage unit, 23 first data communication unit, 24 second data communication unit, 25 display unit, 26 input operation unit, 31 server data storage instructing unit, 32 management data extraction unit, 33 server data Retrieval means, 34: terminal data supplement means, 35: terminal data deletion means, 36: encryption instruction means, 37: decryption key storage means, 38: decryption means, 39: management data update confirmation means, 40: server data update Instructing means, 41: terminal data updating means, 42: management data updating instructing means, 43: terminal data additional registering means, 44: management data Data additional registration instruction means, 45 ... management data deletion confirmation means, 46 ... server data delete instruction means, 47 ... management data delete instruction means.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B082 EA02 HA03 5B089 GA11 GA25 KA11 KA17 KB06 KB13 KC21 KC28 KC51 KC57 KH30 5K101 KK15 KK16 LL12 LL16 MM04 MM05 MM06 MM07 NN02 NN03 NN18

Claims (11)

[Claims] A first data communication unit for performing data communication with a server on a network; a data management device capable of performing data communication with the server; and a second data communication unit for performing data communication without passing through the network. Transferring the management data of the data management device to the server via the network, and storing the transferred management data as server data in the server;
Server data storage instructing means for instructing the data management apparatus via the second data communication means; management data extracting means for extracting the management data of the data management apparatus via the second data communication means; Terminal data storage means for storing management data extracted from the data management device by the data extraction means as terminal data; server data extraction for extracting the server data stored in the server via the first data communication means Means, when the terminal data storage means does not have terminal data corresponding to the management data required by the user, when the data management apparatus can communicate with the data management apparatus via the second data communication means, the management data extraction means The corresponding management data from the data management device is stored in the second data The management data is taken out through the communication means, and the taken out management data is refilled as terminal data in the terminal data storage means, and when the data management device cannot communicate with the data management means through the second data communication means, and When server data corresponding to necessary management data is present in the server, the server data is retrieved from the server via the network and the first data communication means by the server data retrieval means, and the retrieved server data is used as terminal data. A portable information terminal comprising terminal data replenishing means for replenishing the terminal data storage means. 2. The portable information terminal according to claim 1, wherein when the terminal data replenishment means refills the terminal data storage means with terminal data, the terminal data storage means has no empty area. 1 that satisfies a predetermined condition among the terminal data stored in the terminal data storage means
Terminal data deletion means for selecting and deleting the terminal data, and when the terminal data deletion means deletes the terminal data of the terminal data storage means, the server data storage instructing means corresponds to the deleted terminal data. A portable information terminal for instructing the data management device via the second data communication means to transfer the management data to be transferred from the data management device to the server and store it as server data. 3. The portable information terminal according to claim 1, wherein terminal data corresponding to management data required by a user is not present in said terminal data storage means, and said second data communication with said data management device. When communication is not possible via the means, and the server does not have server data corresponding to the management data required by the user, the server has identifier storage means for storing an identifier of the management data that could not be retrieved, After storing the identifier of the management data that could not be taken out to the identifier storage means, when communication with the data management device becomes possible via the second data communication means, the identifier is determined based on the management data identifier stored in the identifier storage means. Then, the management data that could not be taken out was taken out by the management data taking out means via the second data communication means and taken out. Portable information terminal, characterized in that the refill to the terminal data storage means by the terminal data supplement means a physical data as terminal data. 4. The portable information terminal according to claim 1, wherein terminal data corresponding to management data required by a user is not present in said terminal data storage means, and said second data communication with said data management device is performed. When communication is not possible via the means, and the server does not have server data corresponding to the management data required by the user, the server has identifier storage means for storing an identifier of the management data that could not be retrieved, After storing the identifier of the management data that could not be taken out to the identifier storage means, when communication with the data management device becomes possible via the second data communication means, the identifier is determined based on the management data identifier stored in the identifier storage means. Transferring the management data that could not be extracted to the server via the network, and combining the transferred management data with server data. As storage Te, portable information terminal, characterized in that the instruction to the data management device via the second communication means by the server data storage instruction means. 5. The portable information terminal according to claim 1, wherein management data transferred from the data management device to the server via the network is encrypted by the instruction of the server data storage instruction means. Encryption instruction means for instructing the data management device via the second data communication means; and decryption for storing a decryption key for decrypting server data encrypted by the data management device and stored in the server. Key storage means; and decryption means for decrypting the server data retrieved by the server data retrieval means from the server via the first data communication means with the decryption key stored in the decryption key storage means. A portable information terminal comprising: 6. The portable information terminal according to claim 1, wherein when the management data is updated in the data management device, the second data communication means notifies that the management data of the data management device has been updated. A management data update confirming means for confirming via the server, when the server has server data corresponding to the management data updated by the data management apparatus, the data management apparatus updates the server data so that the server data is updated; Server data update instructing means for instructing via the communication means, and when the terminal data corresponding to the management data updated by the data management device is in the terminal data storage means, the updated management data is extracted to the management data extracting means. And retrieves terminal data corresponding to the retrieved management data via the second data communication means. A portable information terminal having terminal data updating means for updating. 7. The portable information terminal according to claim 1, wherein when the management data is deleted in the data management device, the second data communication means notifies the data management device that the management data has been deleted. When the server data corresponding to the management data whose deletion is confirmed by the management data deletion confirmation means is present in the server, the server data corresponding to the management data is deleted. Server data deletion instructing means for instructing the data management device via the second data communication means, and terminal data corresponding to the management data confirmed to be deleted by the management data deletion confirmation means are stored in the terminal data storage means. In some cases, terminal data corresponding to the management data is deleted from the terminal data storage means. A portable information terminal, comprising: 8. The portable information terminal according to claim 1, wherein when the terminal data stored in said terminal data storage means is updated on the portable information terminal side, the updated terminal of said terminal data storage means. The data management device sends the new content of the data to the data management device via the second data communication means and updates the management data of the data management device corresponding to the updated terminal data. (2) A portable information terminal comprising management data update instructing means for instructing via a data communication means. 9. The portable information terminal according to claim 1, wherein said terminal data storage means additionally registers new terminal data, and said terminal data additionally registered in said terminal data storage means. To the data management device via the second data communication means, and instruct the data management device via the second data communication means to additionally register the transmitted terminal data as management data. A portable information terminal having additional registration instruction means. 10. The portable information terminal according to claim 9, wherein when new terminal data is additionally registered in said terminal data storage means by said terminal data additional registration means, a new terminal is stored in said terminal data storage means. When there is no empty area for additionally registering data, one that satisfies a predetermined condition among the terminal data stored in the terminal data storage unit is satisfied.
A terminal data deleting unit for selecting and deleting the terminal data, when the terminal data additional registering unit additionally registers new terminal data in the terminal data storage unit, the terminal data is deleted by the terminal data deleting unit. When deleted, the server data storage instructing means transmits the management data corresponding to the deleted terminal data from the data management device to the server via the second data communication means so as to be stored as server data. A portable information terminal for providing an instruction to the data management device. 11. The portable information terminal according to claim 1, wherein terminal data deletion means for deleting terminal data of said terminal data storage means, and terminal data of said terminal data storage means are deleted by said terminal data deletion means. And a management data deletion instructing means for instructing the data management device via the second data communication means to delete the management data corresponding to the deleted terminal data, When the server data corresponding to the management data designated to be deleted by the server exists in the server, the data management apparatus is instructed to delete the server data corresponding to the management data via the second data communication means. A portable information terminal having server data deletion instruction means.