JP2004297537A - Mobile terminal equipment and system and method for storing information for mobile terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide mobile terminal equipment that is improved in personal information protecting function when the equipment is lost or stolen, and to provide a system and a method for storing information for a mobile terminal. <P>SOLUTION: The mobile terminal equipment 2 has a terminal control unit 20, a communication module 21, and a storage device 22, and has a function of connecting the terminal equipment 2 to an information center 1 provided with a communicating means 11, a storing means 13, and a controlling means 12. The terminal control unit 20 divides information utilized by the mobile terminal equipment 2 into information to be stored in the storing means 13 of the information center 1, and information to be stored in the storage device 22 of its own equipment 2 in an accumulated state. The information to be stored in the storing means 13 is not held in the storage device 22, and even when the information is stored temporarily in the device 22, the information is erased after the information is used. Since important personal information is not preserved in the mobile terminal equipment 2 but in the storage device of the information center 1, the leakage of the important personal information can be prevented even if the mobile terminal equipment is stolen or lost. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile terminal device having information communication and storage functions, such as a mobile phone, a vehicle-mounted phone, and a PDA, and an information storage system and method using such a mobile terminal device.
[0002]
[Prior art]
2. Description of the Related Art A mobile phone having an information communication function in addition to a call function, a PDA (Personal Digital Assistants) having a communication function, and the like are rapidly spreading and widely used. Such mobile terminal devices store and store various personal information such as an address book, an ID for network connection, and a password, but because of their high portability, there is a danger of theft or loss. It is important to ensure security in case of theft or loss.
[0003]
Patent Document 1 is an example of a technique for ensuring security in such a wireless portable terminal device. This document discloses a technique of setting a lost or stolen wireless mobile terminal in an unusable locked state to prevent unauthorized access to a network and reference to internal data.
[0004]
[Patent Document 1]
JP-A-8-251660 (paragraphs 0018 to 0021, FIG. 3)
[0005]
[Problems to be solved by the invention]
However, according to this technology, the owner of the wireless portable terminal device needs to notify the information center of the loss or theft, and the information is not locked until the notification is performed, so that the owner notices the loss or theft. There is a possibility that the personal information may be read by a finder or a thief before the notification is sent to the information center.
[0006]
Accordingly, an object of the present invention is to provide a mobile terminal device and an information storage system and method in the mobile terminal, which have an improved personal information protection function in the event of loss or theft.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, a mobile terminal device according to the present invention is a mobile terminal device having a function of connecting to a center, an information storage function, a storage unit for storing and storing information, and a communication unit for transmitting and receiving information to and from the center. And information to be used in the device are sorted into information to be stored in the center and information to be stored and stored in the storage means, and information updated and changed by the information terminal device among information to be stored in the center is communicated by the communication means. A control means for updating the information stored in the center and erasing the information to be stored in the center from the storage means after use.
[0008]
On the other hand, the information storage system according to the present invention communicates with the center and the mobile terminal device, and stores information from the mobile terminal device to the center and references information stored in the center. The mobile terminal device is classified into storage means for storing and storing information, communication means for transmitting and receiving information to the center, information to be used by the device to be stored in the center, and information to be stored and stored in the storage means. Control for updating the information stored in the center by communication means for information updated / changed by the information terminal device among information to be stored in the center, and deleting the information to be stored in the center from the storage means of the mobile terminal device after use. The center is provided with a center storage means for storing and storing information sent from the mobile terminal device for each user. That.
[0009]
Further, the information storage method according to the present invention is an information storage method for performing communication between a center and a mobile terminal device and storing information from the mobile terminal device to the center and referring to information stored in the center. Information input or received in the terminal device, the step of storing in the storage means, the information in the storage means to be stored in the center, and the step of selecting the information to be stored in the mobile terminal device, Transmitting the information updated / changed in the mobile terminal device to the center among the information to be stored in the center to update the center information; and erasing the information to be stored in the center from the storage means. , Is provided.
[0010]
With this configuration, important personal information is stored in the center side and deleted from the storage means of the terminal device, so that even if the terminal device is lost or stolen, Since important personal information is not stored in the storage means of the device, its leakage can be prevented and security can be ensured.
[0011]
The control means of the mobile terminal device preferably has a function of transmitting authentication information to the center when the center is connected by the communication means. By requiring authentication at the center when connecting to the center, leakage of information stored at the center can be more reliably prevented.
[0012]
It is preferable that an authentication unit for authenticating the operator is further provided, and that the information stored in the storage unit can be read only when the authentication is performed by the authentication unit. Since the authentication of the operator is required even when accessing the storage unit of the terminal device, it is possible to prevent the information stored in the storage unit of the terminal device from being leaked.
[0013]
This mobile terminal device is a mobile terminal device mounted on a vehicle, and the authentication means is preferably an authentication means used when activating the vehicle. For example, if authentication using a so-called immobilizer key is used as authentication means, it is possible to effectively prevent vehicle theft and leakage of personal information from the in-vehicle terminal device.
[0014]
The information stored and stored in the storage means may be data relating to electronic mail. By storing the e-mail data in the storage means, the e-mail can be read without connecting to the server.
[0015]
The control means may further include a function of automatically erasing information stored in the storage means based on a signal received from the center through the communication means. Thus, when the information terminal device is lost or stolen, the information stored in the storage means is erased, thereby more securely preventing leakage of personal information.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description is omitted.
[0017]
FIG. 1 is a system configuration diagram of an information storage system according to the present invention, and includes a mobile terminal device according to the present invention. Here, an example in which an in-vehicle communication terminal device is used as a mobile terminal device will be described.
[0018]
The information storage system 100 includes an information center 1, and the information center 1 is connected to a vehicle-mounted communication terminal device 2, another mobile terminal device 3, a fixed telephone 4, a fixed terminal device 5, and the like via a network 6. The configuration is possible.
[0019]
The information center 1 includes a communication unit 11 connected to the network 6, a control unit 12, and a storage unit (center storage unit in the present invention) 13. The in-vehicle information terminal device 2 includes a terminal control unit (control means in the present invention) 20, a communication module (communication means in the present invention) 21 connected to the network 6 by wireless connection, a volatile or nonvolatile memory, The storage device includes a storage device 22 including a storage medium (such as a hard disk), a medium drive device 24 that can read and write the storage content of a removable storage medium 23, an input unit 25, and a display unit 26. The input unit 25 and the display unit 26 may be separate devices, or may be a device integrating both functions, such as a monitor device with a touch panel function.
[0020]
An electronic moving lock device (immobilizer) 8 is mounted on a vehicle 7 on which the on-vehicle information terminal device 2 is mounted. The immobilizer 8 includes a vehicle key 80 having a communication function, a communication device 81 mounted on the vehicle 7 for performing wireless communication with the vehicle key 80, and a security ECU (ID) for authenticating a driver by communicating with the vehicle key 80. It comprises an authentication means (82 in the present invention), a door lock device 83, an engine switch 84, and a steering lock ECU 85 for locking and releasing the steering. The security ECU 82 is connected to the terminal control unit 20 of the in-vehicle information terminal device 2 as well as the engine ECU 71 for controlling the engine of the vehicle 7 and the like via the in-vehicle LAN 72.
[0021]
The network 6 includes a public line / dedicated line 60 connecting the fixed telephone 4 and the fixed terminal device 5, as well as a wireless base station 61 connected to the in-vehicle communication terminal device 2 and another mobile terminal device 3.
[0022]
Next, the operation of the in-vehicle information terminal device 2 will be described. FIG. 2 to FIG. 5 are processing flows showing processing operations inside the vehicle 7 including the on-vehicle information terminal device 2.
[0023]
First, the operation of the in-vehicle information terminal device 2 at the time of activation (when the ignition of the vehicle is turned on) will be described with reference to the processing flow of FIG. Hereinafter, in this specification, the term “driver” refers only to a legitimate driver who has the authority to drive the vehicle 7 and use the in-vehicle information terminal device 2. This process starts when the driver inserts the vehicle key 80 into the ignition key cylinder. The following processing is performed by the security ECU 82 unless otherwise specified.
[0024]
First, communication is performed between the communication device 81 and the vehicle key 80, and an ID code is received from the vehicle key 80 (step S1). Then, the authentication of the driver is performed by collating the received ID code with an ID code registered in advance in the security ECU 82 of the vehicle 7 (may be stored in the engine ECU 71 or the steering lock ECU 85, etc.) ( Step S2). It is preferable that this ID has tens of thousands or more combinations, and further employs a rolling code system in which the ID is automatically changed every time the door is locked or the key is removed. If the ID code does not match or the authentication is not obtained due to the ID code not being transmitted from the vehicle key 80, the process is terminated as it is. In this case, since the output indicating that the authentication has been obtained from the security ECU 82 is not sent to the engine ECU 71 and the steering lock ECU 85, the steering lock ECU 85 continues to lock the steering, and the engine ECU 71 sets the engine start prohibited state. Is maintained, and even when the engine switch is turned on, the start of the engine is not permitted (immobilizer function). As a result, if only the physical shape of the key portion of the vehicle key 80 is duplicated, authentication by ID cannot be obtained, and the engine cannot be started by the immobilizer function, which helps prevent theft of the vehicle.
[0025]
If the ID codes match, the security ECU 82 notifies the in-vehicle electronic devices (the engine ECU 71, the steering lock ECU 85, the terminal control unit 20 of the in-vehicle information terminal device 2, etc.) via the in-vehicle LAN 72, and ends the processing. (Step S3). Upon receiving this notification, the steering lock ECU 85 unlocks the steering, and the engine ECU 71 shifts to an engine start standby state. The terminal control unit 20 of the in-vehicle information terminal device 2 permits transmission by the communication module 21 and permits access to the storage device 22. As a result, transmission to the information center 1 and reading and writing of information from and to the storage device 22 are possible. When the driver turns on the engine switch from this state, the engine ECU 71 starts the engine. Once the engine has started, the driver can start the vehicle. Unless the driver is authenticated in this way, the vehicle is effectively prevented from being stolen by using the immobilizer function that locks the steering and does not permit the start of the engine. Unless authentication is obtained, communication with the information center 1 and reading / writing of information from / to the storage device 22 cannot be performed, so that security can be ensured for personal information recorded therein.
[0026]
Next, the operation of the in-vehicle information terminal device 2 when communicating with the information center 1 will be described with reference to the processing flow of FIG. The communication with the information center 1 is performed by the driver operating the input unit 25 or automatically by the terminal control unit 20 as necessary. For example, this automatic execution is performed when the latest traffic information is acquired, when e-mail is received, and e-commerce is used when performing route guidance by the in-vehicle information terminal device 2. This control is performed by the terminal control unit 20 unless otherwise specified.
[0027]
First, the communication module 21 is controlled to connect to the wireless base station 61, and is connected to the communication means 11 of the information center 1 through the network 6 (step S11). Subsequently, the authentication information is sent from the in-vehicle information terminal device 2 to the information center 1 (step S12). The authentication information includes, for example, a user ID and a password. The authentication information is input by the driver through the input unit 25 at the time of starting the vehicle or prior to communication, or the vehicle key 80, the security ECU 82, the engine ECU 71, and the steering lock. It is stored in the ECU 85 or the like or the storage medium 23 in advance. When a plurality of drivers use the vehicle 7 and do not share the user ID with other drivers, it is preferable to use a method in which the driver directly inputs or uses a different vehicle key 80 or the storage medium 23 for each driver. . The authentication information is temporarily stored in, for example, a memory in the storage device 22 of the in-vehicle information terminal device 2, and is read out from the storage device 22 and used during communication.
[0028]
The control unit 12 of the information center 1 performs authentication by comparing the user authentication information stored in the storage unit 13 with the sent authentication information, and transmits the authentication result from the communication unit 11 to the communication module via the network 6. 21. The terminal control unit 20 determines the authentication result thus received (step S13). If the authentication has failed, the number of failures Nfail is increased (step S14), and the number of failures Nfail is compared with a threshold Nth (step S15). If the number of failures Nfail is equal to or smaller than the threshold Nth, the process returns to step S12, and the authentication is retried. It is preferable that the driver is notified of the failure of the authentication by the display means 26 or the like prior to the retry, because if the driver makes a mistake in inputting the authentication information, the driver can easily correct the authentication information. On the other hand, if the number of failures Nfail exceeds the threshold Nth, the process proceeds to step S16 without performing the retry. In step S16, the authentication information stored in the storage device 22 is deleted, reading of information from the storage device 22 is prohibited, the information is locked, and the process ends. If the authentication code of the information center 1 is individually set for each driver, it is possible to prevent personal information from leaking to other drivers even when the same vehicle is shared by a plurality of drivers.
[0029]
When the authentication is successful and the connection is established, the process proceeds from step S13 to step S17, in which the personal information of the user stored in the storage means 13 in the information center 1 is downloaded to the information terminal device 2, and the storage device 22 Is stored in Here, the personal information to be downloaded includes authentication information for e-commerce payment, payment information such as a credit card number and a payment account number, and authentication information for receiving e-mail. In this process, when the personal information has already been downloaded, only the updated contents need to be downloaded only when the information in the storage unit 13 is new. A predetermined communication process is performed using the personal information thus downloaded (step S18). After the processing is completed (may be performed in parallel with the processing in steps S17 and S18), information to be stored and stored in the storage device 22 from the information stored in the storage device 22 (hereinafter, local information) ), And information to be stored in the storage unit 13 of the information center 1 (hereinafter, referred to as center information) is selected (step S19). When it is necessary to update the information stored in the storage unit 13 of the information center 1 with respect to the center information, the information is updated and the process ends (step S20).
[0030]
Here, the case where personal information is downloaded from the center side and used is described as an example. However, when the personal information is stored in the center side and the personal information needs to be transmitted to another, the information terminal device is used. Alternatively, the data may be transmitted directly from the center to the destination without passing through the communication device 2.
[0031]
Next, a termination process when stopping the in-vehicle information terminal device 2 will be described with reference to a processing flow of FIG. When the ignition key is turned off and the vehicle key 80 is removed from the ignition key cylinder, the security ECU 82 notifies the in-vehicle electronic device to that effect via the in-vehicle LAN 72. After activation, the terminal control unit 20 monitors the reception of a signal notifying the removal of the vehicle key 80 (step S21), and executes a loop process returning to step S21 until the signal is received. When this signal is received, the process proceeds to step S22, in which the information stored in the storage device 22 is deleted except for the local information, and the process ends. Thus, even if the vehicle 7 is stolen, the important personal information is stored only in the storage unit 13 of the information center 1, so that such personal information does not leak.
[0032]
When the ignition key cylinder is removed, the engine ECU 71 sets the engine start to a prohibited state, and the steering lock ECU 85 locks the steering. The terminal control unit 20 also performs a process of prohibiting transmission of the communication module 21 and prohibiting access to the storage device 22. In addition, in-vehicle electronic devices do not operate unless authentication by ID verification is successful in principle. For this reason, even when the suspicious person removes the in-vehicle information terminal device 2, access to the information in the storage device 22 becomes difficult, and leakage of personal information can be suppressed.
[0033]
Here, an example has been described in which erasing is performed when the vehicle key 80 is removed from the ignition key cylinder. However, erasing may be performed when the driver locks the door from outside the vehicle or shifts to an alert state described later.
[0034]
Next, the operation of the security system of the vehicle 7 will be described with reference to the processing flow of FIG. This process is periodically executed by the security ECU 82 unless otherwise specified. Here, the initial state in which power is first supplied to the security ECU 82 is set to the alert state.
[0035]
First, the security setting state of the vehicle is determined (step S31). This state is the state determined in the previous determination. If it is in the non-alert state, it is determined whether the condition for continuing the non-alert state is satisfied (step S32). This alarm-free condition means that any one of the doors (including the cargo door and the hood) is open or unlocked, the vehicle key 80 is inserted into the ignition key cylinder, and the ignition switch is turned on. It is satisfied when any of the ON cases is satisfied. When these conditions are satisfied, it is determined that the drivers are in the vehicle or near the vehicle, and the process is terminated as it is to maintain the non-alert state. Specifically, the operation stop of the security system is continued. The above-described startup processing, the subsequent driving operation by the driver, the above-described communication processing, and the like are performed in this non-alert state. If the no-alarm condition is not satisfied in step S32, the state shifts to the alert preparation state and the process ends (step S33).
[0036]
When it is determined in step S31 that the state is the alert preparation state, it is determined whether the condition for terminating the alert preparation state is satisfied (step S34). The condition for terminating the alert preparation state is the same as the continuation condition for the above-mentioned alertless state. If the termination condition is satisfied, the duration of the alert preparation state is reset to 0, and the state shifts to the alert-free state (step S35). On the other hand, if the termination condition is not satisfied in step S34, the alert preparation continuation time tar is advanced by the time step Δt (step S36). Then, the alert preparation continuation time tar is compared with the threshold value tar_th (step S37). If the value is equal to or smaller than the threshold value tar_th, the alert preparation state is continued by terminating the process. This alert preparation state takes into account the time required for the drivers to prepare to leave the vehicle and takes into account the time required to transition from the unwatched state to the alert state described below, and the threshold value tar_th of the duration is, for example, , 30 seconds. On the other hand, when the alert preparation continuation time tar exceeds the threshold value tar_th, the alert preparation continuation time tar is reset, the state shifts to the alert state, and the process ends (step S38).
[0037]
If it is determined in step S31 that the state is the alert state, it is determined whether an alarm start condition is satisfied (step S39). This alarm start condition is that when any of the doors (including the luggage door) is unlocked or opened by means other than the authorized vehicle key 80, the battery is once disconnected and then reconnected. It is established. If the condition is satisfied, the state shifts to an alarm state (step S40). Here, the door is forcibly locked by the door lock device 83, and the alarm duration time tac is reset to zero. In addition, the occurrence of abnormalities is notified to the surroundings by intermittently sounding the horn or blinking a hazard lamp. Further, the security ECU 82 notifies the in-vehicle electronic devices of the alarm state via the in-vehicle LAN 72, and upon receiving the notification, the terminal control unit 20 connects to the information center 1 by the communication module 21 to notify the information center of the occurrence of the abnormality. It is good also as a structure which automatically notifies a security company, the police, etc. via 1. At this time, by reporting the position of the own vehicle detected by the navigation system or the like, it is useful for preventing theft of the vehicle and improving the criminal arrest rate.
[0038]
If it is determined in step S39 that the alarm start condition has not been satisfied, it is determined whether the warning release condition has been satisfied (step S41). This alert release condition is satisfied when the door is unlocked with the regular vehicle key 80, the regular vehicle key 80 is inserted into the ignition key cylinder, and the switch is turned ON. When the alert release condition is satisfied, the state shifts to the alertless state (step S42). If the alert release condition is not satisfied, the alert state is continued by terminating the process.
[0039]
If it is determined in step S31 that the state is the alarm state, it is determined whether the alarm release condition is satisfied (step S43). This alarm canceling condition is the same as the above alert canceling condition. When the alarm release condition is satisfied, the process shifts to step S42 and shifts to the non-alert state. On the other hand, if the alarm release condition is not satisfied, the alarm continuation time tac is advanced by the time step Δt (step S44). Then, it is determined whether tac does not exceed the threshold value tac_th (step S45). If the threshold tac_th has been exceeded, the state shifts to the alert state (step S46). If the difference is equal to or smaller than the threshold value tac_th, the process ends as it is, and the alarm state is continued. This prevents the horn sounding and the flashing state of the hazard lamp from continuing for a long time, and prevents the battery from running down. The threshold value tac_th is set to, for example, 30 seconds.
[0040]
As described above, when the door is opened or unlocked by an illegal method, an alarm is activated, so that theft of the vehicle and entry of a suspicious person into the vehicle can be effectively prevented. Further, the terminal control unit 20 may delete the information stored in the storage device 22 in accordance with the alarm operation. In this way, even if a suspicious person invades and the in-vehicle information terminal device 2 is removed, no information is stored in the storage device 22, so that leakage of personal information can be reliably prevented.
[0041]
Further, a service for erasing information stored in the storage device of the information terminal device 2 by remote control from the information center 1 may be provided. FIG. 6 is an image diagram of this service. First, a user who is an authorized driver accesses the information center 1 from the fixed telephone 4, the fixed terminal device 5, or another mobile terminal device 3 and transmits authentication information. This may be performed while the user interacts with the operator of the information center 1 or by connecting the terminal devices 3, 5 and the like to the information center 1. When the authentication is obtained from the information center 1, the user makes an erasure request. In response to this, the information center 1 connects to the information terminal device 2 specified by the user via the communication module 21 and performs authentication. (If the terminal devices 3 and 5 are used, the user may connect to the information terminal device 2 via the information center 1.) Then, when the authentication is obtained, the terminal control unit 20 of the information terminal device 2 By giving the instruction, the personal information stored in the storage device 22 is deleted. The terminal control unit 20 notifies the information center 1 of the success or failure of the erasure via the communication module 21.
[0042]
It is preferable that the in-vehicle electronic devices have a parts immobilizer function that locks the system and does not operate when the electronic devices are removed from the in-vehicle LAN 72 while the immobilizer function is ON. When the in-vehicle information terminal device 2 has the parts immobilizer function, the system lock state is maintained even if the stolen vehicle is returned in a state where the information in the storage device 22 is not erased. It cannot be operated as it is. In this case, the information center 1 connects to the communication module 21 in response to a driver's operation or a request from the information center 1, and the terminal control unit 20 enters the system lock state in the same manner as when erasing information in the storage device 22 from the information center 1. By instructing the cancellation, the operation of the parts immobilizer function may be canceled, and the function may be restored. In addition, by instructing the security ECU 82 from the terminal controller 20, the parts immobilizer function may be canceled for other in-vehicle electronic devices.
[0043]
In the above description, the in-vehicle communication terminal device has been described as an example. However, the present invention is also applicable to other mobile terminal devices having an information communication function and a data storage function such as a mobile phone, a PDA having a wireless communication function, and a notebook computer. Applicable.
[0044]
As the authentication means, in addition to the method using the above-described vehicle key 80 or an authentication means corresponding thereto, authentication may be performed using authentication information such as a password or personal physical information (fingerprint, iris, etc.).
[0045]
【The invention's effect】
As described above, according to the present invention, important personal information is not stored in the mobile terminal device but is stored in the storage device of the information center. Therefore, in the event that the mobile terminal device is stolen or lost, Even if it does, leakage of important personal information can be prevented. Further, since authentication is required in using the mobile terminal device, access from the mobile terminal device to the information center by a third party is prevented, and leakage of personal information is prevented. When the mobile terminal device is an in-vehicle information terminal device, the authentication is preferably authentication at the time of starting the engine of the vehicle.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an information storage system using a mobile terminal device according to the present invention.
FIG. 2 is a flowchart illustrating an operation at the time of starting a mobile terminal device in the information storage system of FIG. 1;
FIG. 3 is a flowchart illustrating an operation of the mobile terminal device during communication in the information storage system of FIG. 1;
FIG. 4 is a flowchart illustrating a termination process when stopping the mobile terminal device in the information storage system of FIG. 1;
FIG. 5 is a flowchart illustrating an anti-theft operation in a vehicle of the information storage system of FIG. 1;
FIG. 6 is an image diagram of a service for erasing information stored in a storage device of the information terminal device 2 by remote control from the information center 1.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Information center, 2 ... In-vehicle communication terminal device, 3 ... Mobile terminal device, 4 ... Fixed telephone, 5 ... Fixed terminal device, 6 ... Network, 7 ... Vehicle, 8 ... Electronic mobile lock device (immobilizer), 11 ... Communication means, 12 control means, 13 storage means, 20 terminal control section, 21 communication module, 22 storage device, 23 storage medium, 24 medium drive device, 25 input means, 26 display means, Reference numeral 60: Public line / dedicated line, 61: Wireless base station, 71: Engine ECU, 72: In-vehicle LAN, 80: Vehicle key, 81: Communication device, 82: Security ECU, 83: Door lock device, 84: Engine switch, 85 ... steering lock ECU, 100 ... information storage system.

Claims (8)

In a mobile terminal device having a function of connecting to a center and an information storage function,
Storage means for storing and storing information;
Communication means for transmitting and receiving information to and from the center,
The information to be used in the device is sorted into information to be stored in the center and information to be stored and stored in the storage means. Control means for updating storage information of the center by means, and deleting information to be stored in the center from the storage means after use;
A mobile terminal device comprising: 2. The mobile terminal device according to claim 1, wherein the control unit has a function of transmitting authentication information to the center when the communication unit connects to the center. 3. The mobile terminal device according to claim 1, further comprising an authentication unit that authenticates the operator, wherein the information stored in the storage unit can be read only when authentication is performed by the authentication unit. The mobile terminal device according to claim 3, wherein the device is a mobile terminal device mounted on a vehicle, and the authentication unit is an authentication unit used when starting the vehicle. 5. The mobile terminal device according to claim 4, wherein the information stored and stored in said storage means is data relating to an electronic mail. The control device according to claim 1, further comprising a function of automatically deleting information stored in the storage device based on a signal received from the center through the communication device. The mobile terminal device according to claim 1. In the information storage system performing communication with the center and the mobile terminal device, and performing information storage from the mobile terminal device to the center and reference to information stored in the center,
The mobile terminal device,
Storage means for storing and storing information;
Communication means for transmitting and receiving information to and from the center,
The information to be used in the device is sorted into information to be stored in the center and information to be stored and stored in the storage means. Control means for updating the storage information of the center by means, and deleting information to be stored in the center from the storage means of the mobile terminal device after use,
With
The center is
Center storage means for storing and storing information sent from the mobile terminal device by classifying the information for each user,
Information storage system comprising: In the information storage method of performing communication between the center and the mobile terminal device, and performing information storage from the mobile terminal device to the center and reference to information stored in the center,
Storing information input or received by the mobile terminal device in a storage means;
Selecting information in the storage means to be stored in the center and information to be stored in the mobile terminal device;
Of the information to be stored in the center, transmitting information updated / changed in the mobile terminal device to the center, and updating center information;
Erasing information to be stored in the center from the storage means;
An information storage method comprising:

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