JP2007074704A - Remote locking system, communication terminal, remote locking method and server for communication network - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote locking system capable of more rapidly and positively remotely locking a stolen mobile communication terminal such as a cellular phone or a stolen information processing terminal having a communication function. <P>SOLUTION: In the remote locking system, when performing a position registration request to a communication network including a base station 51, the mobile communication terminal 2 determines whether a signal received from the communication network in an authentication phase includes a remote locking instruction signal. If it includes the signal, the terminal 2 stops a function of accessing user data 31 or the functions of an input output section. Also, upon receiving the position registration request from the mobile communication terminal 2, the communication network refers to a subscriber information database 46 to transmit remote locking instruction information when a locking instruction is set on the mobile communication terminal 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a remote lock system, a communication terminal, a remote lock method, and a communication network server, and in particular, a stolen communication terminal (for example, a mobile communication terminal such as a mobile phone or an information processing terminal equipped with a data communication card) Remote lock system, communication terminal, remote lock method, and server for communication network that can perform remote lock (user data access function and I / O function stop, etc.) more quickly and reliably It is about.

  Recently, mobile communication terminals such as mobile phones and information processing terminals having communication functions (for example, mobile PCs equipped with a PHS data communication card) have become widespread, greatly increasing not only for business use but also for personal use. It's being used. In addition, the function of the mobile communication terminal is improved, it is possible to perform high-speed data communication by connecting to a communication network such as the Internet, and a large amount of user data (for example, user personal information such as e-mail data and address book). It is also possible to save.

  By the way, while the convenience of communication terminals such as mobile communication terminals has been improved, the convenience has been improved, but the communication terminals have been stolen and the user data recorded in these communication terminals has been read and misused by an unauthorized third party. If this happens, the damage will increase.

  For this reason, as a security function of a conventional communication terminal, when the communication terminal A is stolen, a lock code is sent to the communication terminal A from the base station or another communication terminal B using a mail or the like and locked remotely. This function prevents unauthorized use by others or leakage of personal information.

  However, if the communication terminal A is not in a state where it can receive remote lock instruction information (lock control information) such as e-mail (power OFF, out of service area, etc.), how much remote lock instruction information is received from the base station or another communication terminal B. Even if it is transmitted, the communication terminal A is not locked.

  For this reason, it is necessary to periodically transmit a lock signal from the base station or other communication terminal B, and depending on the lock signal transmission interval, it is illegally used before being locked, and confidential data and personal information are transferred to external media. There was a possibility of being leaked by being copied.

  As a conventional technique, there is the following remote security system (for example, see Patent Document 1). That is, this remote security system includes an RF receiver that receives a signal from the communication system, and has a security function that can be remotely activated by commanding the RF receiver via the communication system. It is intended to provide. However, in the remote security system of this prior art, when the communication with the communication system is impossible, the security function cannot be activated and the above problem cannot be solved.

Moreover, there are portable terminal devices as follows (see, for example, Patent Document 2). This portable terminal device is designed to stop key input when the portable terminal device is stolen, and when a theft signal (specific signal) is received from the outside (host computer) Further, a theft state determination means provided inside operates to invalidate the key input. However, in the portable terminal device of this prior art, when it is in a state where communication with the outside is impossible, the security function cannot be operated, and the above-mentioned problems cannot be solved.
JP-A-11-134297 JP-A-3-100894

  As described above, in a communication terminal such as a conventional mobile phone, there is a problem that a remote lock signal cannot be transmitted to the mobile communication terminal when the mobile communication terminal is in a state where communication is not possible (out of service area or the like). In order to avoid this, it is necessary to periodically transmit a remote lock signal from another communication terminal or base station so that the use prohibition signal is received in a period in which the mobile communication terminal can communicate. It was.

  The present invention has been made to solve such a problem, and its purpose is to enable remote lock to a stolen communication terminal more quickly and reliably. It is an object to provide a remote lock system, a communication terminal, and a remote lock method that can eliminate the need for periodic transmission of a remote lock signal from a base station and reduce the load on the communication network.

  The remote lock system of the present invention is a remote lock system including a communication terminal and a communication network in which the communication terminal communicates wirelessly, and the communication terminal transmits a call to the communication network. Remote lock instruction presence / absence determining means for determining whether or not remote lock instruction information is included in a signal received from the communication network when performing at least one of a request and a location registration request; and the remote lock instruction A function management unit that stops at least a user data access function when the presence / absence determination unit determines that the remote lock instruction information is included, and the communication network side includes a subscriber of the communication terminal. Subscriber information data base for recording data and lock instruction information for the communication terminal. And at least one of a call origination request or a location registration request from the communication terminal, the remote lock instruction information is generated when the lock instruction information is set by referring to the subscriber information database. And lock information setting means for transmitting to the communication terminal.

  With such a configuration, when the communication terminal makes at least one of a call origination request and a location registration request to the communication network, does the remote lock instruction information be included in the signal received from the communication network side? If remote lock instruction information is included, at least access to user data (for example, user personal information such as e-mail data and address book data) is stopped. Also, when at least one of a call origination request and a location registration request is received from a communication terminal, the communication network side refers to the subscriber information database, and whether or not a lock instruction is set for the communication terminal. If the lock instruction is set, remote lock instruction information is generated and transmitted to the communication terminal.

  As a result, when there is at least one of a call origination request and a location registration request from the communication terminal, the remote lock instruction information can be transmitted from the communication network side. For this reason, remote lock (stop of user data access function, stop of input / output unit function, etc.) can be performed more quickly and reliably on a stolen communication terminal. In addition, it is not necessary to periodically send remote lock instruction information from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

  The remote lock system according to the present invention refers to the subscriber information database when the communication network side receives at least one of a call origination request or a location registration request from the remote-locked communication terminal. If the lock instruction information for the communication terminal is not set, a lock information that generates a signal that does not include the remote lock instruction information or generates a signal that includes the remote lock release instruction information and transmits the signal to the communication terminal Provided with setting means, and the communication terminal includes remote lock instruction information in a signal received from the communication network when making at least one of a call origination request and a location registration request to the communication network. The remote lock release instruction information is included. When the remote lock instruction presence / absence determining means and the remote lock instruction presence / absence determining means determine that the remote lock instruction information is not included or the remote lock release instruction information is included, the lock is released. And a function management means.

  With such a configuration, when a remote-locked communication terminal makes at least one of a transmission request or a location registration request to the communication network, the remote lock instruction information is included in the signal received from the communication network side. It is determined whether or not remote lock release instruction information is included. If remote lock instruction information is not included or remote lock release instruction information is included, the communication terminal Release the lock. Further, the communication network side refers to the subscriber information database when receiving at least one of a call origination request and a location registration request from the communication terminal, and if the lock instruction is not set, the remote lock instruction information is displayed. A signal not included is generated, or a signal including remote lock release instruction information is generated and transmitted to the communication terminal.

  As a result, for example, the communication terminal can be remotely controlled from the communication network side to stop / permit the user data access function, the input / output unit function, and the like. For this reason, for example, when a stolen communication terminal is returned to a legitimate user, it can be set remotely so that the communication terminal can be used again. Further, it is possible to remotely control the communication terminal so as to allow use of the communication terminal only in a predetermined time zone (for example, working hours).

In the remote lock system of the present invention, the communication terminal includes a function terminal and a communication module configured to be detachably attached to the function terminal main body and used for communication connection with the communication network. According to such a configuration, when a communication terminal equipped with a communication module (for example, a PHS data communication card) is stolen, the remote communication lock (for the stolen communication terminal more quickly and reliably) It is possible to stop the access function to the user data, stop the function of the input / output unit, etc.).

  The remote lock system of the present invention is configured such that the communication terminal is configured to be detachable or connectable with the information processing terminal and the information processing terminal, and the information processing terminal is used for communication connection with the communication network. And a wireless communication terminal.

  With this configuration, when an information processing terminal such as a PC (personal computer) equipped with a wireless communication terminal (for example, a PHS data communication card) is stolen, the stolen information processing terminal Remote lock (stopping user data access function, stopping input / output unit function, etc.) can be performed quickly and reliably.

In the remote lock system of the present invention, the communication terminal is positioned relative to the communication network at least one of when the communication terminal is powered on or when the communication terminal moves between cells. A means for making a registration request is provided.
Less when the communication terminal is powered on or when the communication terminal moves between cells With this configuration, the communication terminal moves between cells each time the communication terminal is powered on Each time a location registration request is made to the communication network from the communication terminal. Thereby, remote lock (stop of user data access function, stop of function of input / output unit, etc.) can be performed more quickly and reliably on a stolen communication terminal.

  In the remote lock system of the present invention, the communication terminal is provided with a timer for measuring a time during which communication by the communication terminal is not performed for a certain period of time, and the communication is performed when the measurement time of the timer expires. Means is provided for making a call request to the network.

  With such a configuration, a timer is provided in the communication terminal for measuring the time during which the communication terminal has not performed communication for a certain period of time, and when the measurement time of this timer expires, a call request is made to the communication network. To. Thereby, remote lock (stop of user data access function, stop of function of input / output unit, etc.) can be performed more quickly and reliably on a stolen communication terminal. In addition, it is not necessary to periodically send a remote lock signal from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

  Further, in the remote lock system of the present invention, the communication terminal is provided with a timer for measuring a time during which no key input operation is performed in the communication terminal, and when the measurement time of the timer expires, A means for making a transmission request to the communication network at the next key input operation is provided.

  With such a configuration, a timer is provided in the communication terminal for measuring a time during which no key input is performed in the communication terminal, and when the measured time of this timer expires, the next key input operation is performed. A call origination request is made to the communication network. As a result, the key input operation is performed when the stolen communication terminal is a mobile phone or the like, the power is kept on (ON), and no new call request or location registration request is made. When a call is made, the communication terminal can be remotely locked (stopping the function of accessing user data, stopping the function of the input / output unit, etc.).

  The remote lock system of the present invention is characterized in that the remote lock instruction information is received by the communication terminal in an authentication phase with the communication network.

  With this configuration, the communication terminal receives remote lock instruction information for locking the communication terminal from the communication network in the authentication phase. As a result, it becomes possible for the stolen communication terminal to perform remote lock (stopping the user data access function, stopping the function of the input / output unit, etc.) at the initial stage when accessing the communication network.

  In the remote lock system of the present invention, the remote lock instruction information for the communication terminal is transmitted to the communication terminal in a position registration sequence between the communication terminal and the communication module after the authentication is completed and before the wireless channel is disconnected. In the control sequence at the time of outgoing call, the control sequence is configured to be transmitted to the communication terminal after the end of authentication and before the call connection.

  With such a configuration, the remote lock instruction information is transmitted to the communication terminal. In the location registration sequence, it is transmitted after the authentication is completed and before the wireless channel is disconnected, and in the control sequence at the time of collective transmission. Is transmitted to the stage before the call connection after the authentication is completed.

  Thus, in the communication connection sequence between the communication terminal and the communication network, the remote lock instruction information can be transmitted to the communication terminal without imposing a burden on the communication network.

  The remote lock system according to the present invention further comprises means for detecting that the communication terminal is out of the communication network and controlling the stop of the operation of the communication terminal by inputting a password when the communication terminal is out of the communication network. It is characterized by that.

  With such a configuration, the locking operation can be performed even when the communication terminal is stolen out of the communication range.

  In the remote lock system of the present invention, the communication terminal has a data storage unit that encrypts and stores data, and the remote lock instruction presence / absence determining unit determines that the remote lock instruction information is included In addition, the decoding of the data in the data storage unit is stopped.

  With such a configuration, it is possible to prevent data from being seen by a third party at the time of theft.

  Further, the communication terminal of the present invention is a remote lock comprising a communication terminal and a communication network having a function of transmitting the remote lock instruction information to the communication terminal while the communication terminal communicates wirelessly. Whether or not the communication terminal in the system includes remote lock instruction information in a signal received from the communication network when performing at least one of a call origination request and a location registration request to the communication network Remote lock instruction presence / absence determination means for determining whether or not the remote lock instruction presence / absence determination means determines that the remote lock instruction information is included, and at least a function management means for stopping an access function to user data; It is characterized by providing.

  With such a configuration, when the communication terminal makes at least one of a call origination request and a location registration request to the communication network, does the remote lock instruction information be included in the signal received from the communication network side? If remote lock instruction information is included, at least access to user data (for example, user personal information such as e-mail data and address book data) is stopped.

  As a result, when there is at least one of a call origination request and a location registration request from the communication terminal, the remote lock instruction information can be transmitted from the communication network side. For this reason, remote lock (stop of user data access function, stop of input / output unit function, etc.) can be performed more quickly and reliably on a stolen communication terminal. In addition, it is not necessary to periodically send remote lock instruction information from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

  The communication terminal of the present invention does not include remote lock instruction information in a signal received from the communication network when making at least one of a transmission request and a location registration request to the communication network. Or the remote lock instruction presence / absence determining means for determining whether the remote lock release instruction information is included and the remote lock instruction presence / absence determining means, the remote lock instruction information is not included or the remote lock And a function management means for releasing the lock when it is determined that the release instruction information is included.

  With such a configuration, a communication terminal that is remotely locked (access to user data is stopped) receives from the communication network side when making a call request or a location registration request to the communication network. If it is determined that the remote lock instruction information is not included in the received signal or that the remote lock release instruction information is included, the remote lock is released, and the user data access function and the like are restored.

  As a result, the communication network can be remotely controlled from the communication network side to stop / permit the user data access function, the input / output unit function, and the like. For this reason, for example, when a stolen communication terminal is returned to a legitimate user, it can be set remotely so that the communication terminal can be used again. Further, it is possible to remotely control the communication terminal so as to allow use of the communication terminal only in a predetermined time zone (for example, working hours).

  Further, the communication terminal of the present invention is characterized in that the communication terminal is composed of a function terminal and a communication module configured to be detachably attached to the function terminal main body and used for communication connection with the communication network. And

  With such a configuration, when a communication terminal equipped with a communication module (for example, a PHS data communication card) is stolen, the stolen communication terminal can be remotely locked (to user data) more quickly and reliably. The access function can be stopped, the function of the input / output unit can be stopped, and the like.

  The communication terminal of the present invention is configured such that the communication terminal is configured to be detachable or connectable to the information processing terminal and the information processing terminal, and the information processing terminal is used for communication connection to the communication network. It is characterized by comprising a communication terminal.

  With this configuration, when an information processing terminal such as a PC (personal computer) equipped with a wireless communication terminal (for example, a PHS data communication card) is stolen, the stolen information processing terminal Remote lock (stopping user data access function, stopping input / output unit function, etc.) can be performed quickly and reliably.

  In addition, the communication terminal of the present invention registers the location of the communication terminal with respect to the communication network at least one of when the communication terminal is powered on or when the communication terminal moves between cells. A means for making a request is provided.

  With such a configuration, each time the communication terminal is powered on or whenever the communication terminal moves between cells, the communication terminal makes a location registration request to the communication network. Thereby, remote lock (stop of user data access function, stop of function of input / output unit, etc.) can be performed more quickly and reliably on a stolen communication terminal.

  In the communication terminal of the present invention, a timer for measuring a time during which communication by the communication terminal has not been performed is provided in the communication terminal, and when the measurement time of the timer expires, the communication network On the other hand, there is provided a means for making a transmission request.

  With such a configuration, a timer is provided in the communication terminal for measuring the time during which the communication terminal has not performed communication for a certain period of time, and when the measurement time of this timer expires, a call request is made to the communication network. To. Thereby, remote lock (stop of user data access function, stop of function of input / output unit, etc.) can be performed more quickly and reliably on a stolen communication terminal. In addition, it is not necessary to periodically send a remote lock signal from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

In the communication terminal of the present invention, the communication terminal is provided with a timer for measuring a time during which no key input operation has been performed in the communication terminal for a certain period of time. Means for making a call origination request to the communication network at the time of a key input operation of the communication terminal. With such a configuration, a time during which no key input is made at the communication terminal is measured in the communication terminal for a certain period of time. A timer is provided, and when the measured time of this timer expires, a call request is made to the communication network when a key input operation is performed next time. As a result, the key input operation is performed when the stolen communication terminal is a mobile phone or the like, the power is kept on (ON), and no new call request or location registration request is made. When a call is made, the communication terminal can be remotely locked (stopping the function of accessing user data, stopping the function of the input / output unit, etc.).

  The communication terminal of the present invention is characterized in that reception of remote lock instruction information at the communication terminal is performed in an authentication phase with the communication network.

  With this configuration, the communication terminal receives remote lock instruction information for locking the communication terminal from the communication network in the authentication phase. As a result, it becomes possible for the stolen communication terminal to perform remote lock (stopping the user data access function, stopping the function of the input / output unit, etc.) at the initial stage when accessing the communication network.

  In the communication terminal according to the present invention, the remote lock instruction information in the communication terminal is a UUI message in a position registration sequence between the communication terminal and the communication module as a UUI message at a stage after the end of authentication and before disconnection of the radio channel. It is transmitted to the communication terminal, and is configured to be transmitted to the communication terminal as a UUI message at the stage after the end of authentication and before the call connection in the control sequence at the time of batch transmission.

  With such a configuration, the remote lock instruction information is transmitted to the communication terminal as a UUI message. In the location registration sequence, the UUI message is transmitted at the stage after the authentication is completed and before the wireless channel is disconnected. In the control sequence at the time of transmission, a UUI message is transmitted in a stage after the end of authentication and before call connection.

  Thus, in the communication connection sequence between the communication terminal and the communication network, the remote lock instruction information can be transmitted to the communication terminal without imposing a burden on the communication network.

  Further, the communication terminal of the present invention is characterized by comprising means for detecting that the communication terminal is out of the service area and controlling the stop of the operation of the communication terminal by inputting a password when the communication terminal is out of service area.

  With such a configuration, the locking operation can be performed even when the communication terminal is stolen out of the communication range.

  The communication terminal of the present invention includes a data storage unit that encrypts and stores data, and the data storage unit stores the data storage unit when the remote lock instruction presence / absence determination unit determines that the remote lock instruction information is included. The decoding of the data of the copy is stopped.

  With such a configuration, it is possible to prevent data from being seen by a third party at the time of theft.

  The remote lock method of the present invention is a remote lock method in a remote lock system including a communication terminal and a communication network in which the communication terminal communicates wirelessly, and is controlled by a control unit in the communication terminal. A remote lock instruction for determining whether or not remote lock instruction information is included in a signal received from the communication network when making at least one of a call origination request and a location registration request to the communication network And a function management procedure for stopping at least a function of accessing user data when the remote lock instruction presence / absence determining means determines that the remote lock instruction information is included. The subscriber computer of the communication terminal and the communication data A procedure for recording lock instruction information for a terminal in a subscriber information database, and when receiving at least one of a transmission request or a location registration request from the communication terminal, the subscriber information database is referred to, and the lock instruction information is When set, a lock information setting procedure for generating the remote lock instruction information and transmitting it to the communication terminal is performed.

  With such a procedure, when the communication terminal makes at least one of a call origination request and a location registration request to the communication network, does the remote lock instruction information be included in the signal received from the communication network side? If remote lock instruction information is included, at least access to user data (for example, user personal information such as e-mail data and address book data) is stopped. Further, when at least one of a call origination request and a location registration request is received from a communication terminal, the communication network side refers to the subscriber information database and determines whether or not a lock instruction is set for the communication terminal. If the lock instruction is set, remote lock instruction information is generated and transmitted to the communication terminal.

  As a result, when there is at least one of a call origination request and a location registration request from the communication terminal, the remote lock instruction information can be transmitted from the communication network side. For this reason, remote lock (stop of user data access function, stop of input / output unit function, etc.) can be performed more quickly and reliably on a stolen communication terminal. In addition, it is not necessary to periodically send remote lock instruction information from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

The communication network server of the present invention is a server in a communication network that performs data communication via a communication terminal, and the server includes a subscriber information database that records subscriber information of the communication terminal, When at least one of a call origination request and a location registration request is received from the communication terminal, the subscriber information database is referred to, the communication terminal is not recorded in the subscriber information database, or the subscription When information prohibiting the use of the communication terminal is registered in the person information database, a remote lock instruction signal is generated and transmitted to the communication terminal.
Thereby, when there is at least one of a transmission request or a location registration request from the communication terminal, a remote lock instruction signal (a signal for stopping the function of the communication terminal) can be transmitted from the communication network side. For this reason, it is possible to perform remote lock more quickly and reliably for a stolen communication terminal.

  In the present invention, remote lock (to user data) can be more quickly and reliably performed on a stolen communication terminal (a mobile communication terminal such as a mobile phone or an information processing terminal such as a PC equipped with a data communication card). The access function can be stopped, the function of the input / output unit can be stopped, and the like. In addition, it is not necessary to periodically send remote lock instruction information from a base station or another communication terminal to a stolen communication terminal, and the load on the communication network can be reduced.

  In addition, remote lock information is added to operations that are essential for incoming calls and handovers in current PHS or mobile phones, such as location registration, for stolen communication terminals, or after authentication at the time of communication terminal transmission is completed By adding information on the presence or absence of remote lock to the call response, the lock / unlock can be performed by the transition operation itself to the communicable state.

  The present invention adds information on the presence / absence of remote lock to the location registration response in the location registration authentication with the base station of the communication terminal, or adds information on the presence / absence of remote lock to the call response after authentication completion at the time of transmission of the communication terminal. By adding, a remote lock for the communication terminal is realized, the communication load in the remote authentication is reduced, and a periodic transmission of a remote lock signal from the network side such as a base station is made unnecessary.

  As a function on the network side, a remote lock state is set as an additional message of a location registration response according to a request from a contract user of the communication terminal. Further, as a function on the mobile terminal side, there is a mechanism for reading the additional message content of the response signal from the communication network at the time of position registration operation (or transmission operation) and locking the function of the communication terminal. With these functions, when a stolen communication terminal accesses the network, the communication terminal can be remotely locked. When unlocking, the network setting is changed, so that unlocking is performed remotely at the time of the next location authentication of the communication terminal (or at the time of requesting a call).

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram for explaining an outline of a remote lock system according to the present invention. In the remote lock system 1A shown in FIG. 1, 2 is a stolen mobile communication terminal (PS), 51 is a base station (CS), and 52 is an authentication server. Note that the base station 51 and the authentication server 52 are devices belonging to the communication network side.

  Hereinafter, the flow of the process will be described with reference to FIG.

  First, in response to a user request, the rope manager performs remote lock setting of the mobile communication terminal 2 in the subscriber information database 46 of the authentication server 52 (step S1).

  Next, it is assumed that a location registration request is generated from the mobile communication terminal 2 (step S2). On the communication network side, an authentication request is issued to the mobile communication terminal 2 in order to authenticate whether or not the connection source mobile communication terminal 2 is valid in the connection sequence (step S3). The mobile communication terminal 2 returns an authentication response to the authentication request (step S4).

  On the communication network side, the authentication server 52 confirms the contents of the authentication response of the mobile communication terminal 2 and transmits a location registration acceptance signal to the mobile communication terminal 2. In step S1, the subscriber information database 46 is in a remote lock state. Is set, a remote lock instruction message is added to the mobile communication terminal 2 and issued (step S5).

  Since the mobile communication terminal 2 has received the remote lock instruction, the mobile communication terminal 2 performs access stop or deletion to the user data 31 and stop operation of the input / output unit in accordance with the preset remote lock mode. Lock.

  FIG. 2 is a diagram showing a procedure for unlocking the mobile communication terminal 2 that is remotely locked. The remote lock is released by the following procedure.

  First, in response to a user request, a setting for releasing the remote lock of the mobile communication terminal 2 is performed on the network-side authentication server (step S7). Next, a location registration request from the mobile communication terminal 2 is generated (step S2). Then, in the connection sequence, the communication network side issues a request for authentication to the mobile communication terminal 2 whether the connection source mobile communication terminal 2 is valid (step S3), and the mobile communication terminal 2 authenticates. A response is returned to the request (step S4).

  Then, although the authentication response content of the mobile communication terminal 2 is confirmed by the authentication server, since the lock release for the mobile communication terminal 2 is set, the location registration that does not include the remote lock instruction message to the mobile communication terminal 2 A reception is transmitted or a position registration reception including a remote unlocking instruction is issued (step S8). The mobile communication terminal 2 recovers the user data access function and the input / output function, and releases the lock (step S9).

[Description of First Configuration Example of Remote Lock System]
FIG. 3 is a diagram showing a first configuration example of the remote lock system of the present invention. In FIG. 3, the remote lock system 1 </ b> A includes a mobile communication terminal 2 such as a mobile phone and a communication network 40. The communication network 40 is shown as the communication network 40 including the functions of the base station 51 and the authentication server 52 shown in FIG.

  The mobile communication terminal 2 is a mobile phone or the like, and shows a part related to the present invention. The mobile communication terminal 2 includes a key input unit 11 for operating the mobile communication terminal 2, a display unit 12, a voice input / output unit 13 for inputting / outputting voice, a control unit 20 for controlling the entire mobile communication terminal 2, A non-volatile memory 30 that stores data (for example, a program) necessary for processing of the mobile communication terminal 2, user data 31, and a remote lock operation flag 32 is provided.

  The transmission / reception control unit 21 in the control unit 20 of the mobile communication terminal 2 is a processing unit for performing wireless data transmission / reception with the communication network 40. The remote lock instruction presence / absence determining unit 22 performs a process of determining whether or not the remote lock instruction information is included in the signal received from the communication network 40 via the transmission / reception control unit 21.

  If the remote lock instruction presence / absence determination unit (remote lock instruction presence / absence determination means) 22 determines that the remote lock instruction information is included in the signal received from the communication network 40, the remote lock operation flag 32 is turned on ( ON) is performed, and when it is determined that the remote lock instruction signal is not included, processing for turning off (OFF) is performed. When it is determined that the remote lock instruction information is not included or the remote lock release instruction information is included, a process of turning off the remote lock operation flag 32 is performed.

  The lock function unit 23 refers to the remote lock operation flag 32 and performs on / off (ON / OFF) control of the switch (SW1) 25. That is, when the remote lock operation flag 32 is on (ON), the switch (SW1) 25 is turned off (OFF), and use of the user data 31 is stopped.

  The function management unit (function management means) 24 is a processing unit that manages the execution of the functions (input / output function, display function, etc.) of the mobile communication terminal, and when the switch (SW1) 25 is off (OFF). Stops the access function to the user data 31 so that the user data 31 cannot be read. On the other hand, when the switch (SW1) 25 is on (ON), access to the user data 31 is permitted and the user data 31 can be read.

  The communication network 40 includes a control unit 41 and a nonvolatile memory 45. The transmission / reception control unit 42 in the control unit 41 is a processing unit for performing wireless data transmission / reception with the mobile communication terminal 2. When the subscriber information control unit 44 receives a call request from the mobile communication terminal 2, the subscriber information control unit 44 refers to the subscriber information database 46 in the nonvolatile memory 45 to determine whether or not the mobile communication terminal is a valid subscriber. Process for authenticating.

  The lock information setting unit (lock information setting means) 43, when the subscriber information control unit 44 refers to the subscriber information database 46 and determines that the remote lock instruction is set, the mobile communication terminal A process of generating a remote lock instruction for remotely locking 2 is performed. When the remote lock instruction is released for the mobile communication terminal 2 that is remotely locked, a response signal (for example, a position registration response signal) including remote lock release instruction information is generated, or A response signal not including the lock instruction information is generated.

  The remote lock instruction information generated in the lock information setting unit 43 is transmitted to the mobile communication terminal 2 via the transmission / reception control unit 42. The remote lock instruction information (or remote lock release instruction information) is added to the location registration acceptance signal in the authentication phase as a message and transmitted to the mobile communication terminal 2.

  FIG. 15 is a diagram illustrating an example of the subscriber information database 46. As shown in FIG. 15, the subscriber information database 46 stores a telephone number, a stop instruction, and other necessary information (for example, the type of contract service) using the subscriber ID as an index. The lock instruction is information for the rope manager to set the lock instruction for the mobile communication terminal 2 when there is a use stop request for the mobile communication terminal 2 at the request of a legitimate user. For example, the case of “x” mark is the subscriber ID that is the target of remote lock.

[Description of Second Configuration Example of Remote Lock System]
FIG. 4 is a diagram showing a second configuration example of the remote lock system of the present invention. A remote lock system 1B shown in FIG. 4 shows an example in which the mobile communication terminal 2 shown in FIG. 3 includes a communication module 3 having a wireless communication function and a functional terminal 4. The function terminal 4 includes a key input unit 11 including dial keys and various function buttons, a display unit 12 such as an LCD, a voice input / output unit 13, a function management unit 24 that manages user data such as an address book / photograph, and the like. It has. The functional terminal 4 and the communication module 3 are connected by I / F units 14 and 15 (for example, PCMCIA, USB, unique interface, etc.).

  In this configuration example, the function terminal 4 is notified of the value of the remote lock operation flag 32 determined by the communication module 3 and stored in the nonvolatile memory 30A. The lock control unit 26 in the functional terminal 4 controls the switch (SW1) 25 on / off (ON / OFF) according to the value of the remote lock operation flag 32 notified from the communication module 3. When the switch (SW1) 25 is off (OFF), the function management unit 24 stops the access function to the user data 31 in the nonvolatile memory 30B. Also, lock operation such as key lock is performed.

  In addition, about each structure in the communication module 3 and the functional terminal 4, the code | symbol which shows them is the same function and operation | movement as each structure in FIG. 3 shown with the same code | symbol, and those description is here. I will omit it.

[Description of Third Configuration Example of Remote Lock System]
FIG. 5 is a diagram showing a third configuration example of the remote lock system of the present invention. The remote lock system 1C shown in FIG. 5 includes a wireless communication terminal (for example, a PHS data communication card) 5 as a terminal and information such as a PC and a PDA in which the wireless communication terminal 5 is connected by I / F units 14 and 15. The example comprised with the processing terminal 6 is shown. As a connection method between the information processing terminal 6 and the wireless communication terminal 5, a wired connection such as PCMCIA / USB / RS232C can be used, and a wireless connection such as wireless LAN / Bluetooth / UWB can also be used.

  In the configuration shown in FIG. 5, the value of the remote lock operation flag 32 determined by the wireless communication terminal 5 and stored in the nonvolatile memory 30 </ b> A is notified to the information processing terminal 6. The lock control unit 26 in the information processing terminal 6 controls the switch (SW1) 25 on / off (ON / OFF) according to the value of the remote lock operation flag 32 notified from the communication module 3. When the switch (SW1) 25 is off (OFF), the function management unit 24 stops the access function to the user data 31 in the nonvolatile memory 30B. Also, lock operation such as key lock is performed.

  The key data 33 is stored in the nonvolatile memory 30A of the wireless communication terminal 5, and is sent to the lock control unit 26A through the switch (SW2) 27 that is turned on / off according to the value of the remote lock operation flag 32. It is supposed to be.

  This key data is used to transmit the value of the remote lock flag determined by the wireless communication terminal 5, or to unlock the information processing terminal 6, or to release or decrypt the encrypted data in the information processing terminal 6. By turning off the switch (SW2) 27, the access to the key data 33 from the information processing terminal 6 is stopped, thereby making the information processing terminal 6 unusable or decrypting the encrypted information. It is possible to prevent leakage of confidential information and personal information by not allowing it. For example, the hard disk in the information processing terminal 6 may be removed and decrypted. Therefore, as a countermeasure in this case, information on the encryption key is stored in the wireless communication terminal 5 and information recorded on the hard disk with this encryption key is recorded. When the wireless communication terminal 5 receives remote lock instruction information from the communication network 40 side, the encryption key information is locked or deleted.

  In addition, about each structure in the radio | wireless communication terminal 5 and the information processing terminal 6, what has the code | symbol which shows them the same as FIG. 3 is the same function and operation | movement as each structure in FIG. Are omitted here.

[Description of First Processing Method in Remote Lock System 1A]
In the configuration example of the remote lock system 1A described with reference to FIG. 3, the position registration execution timing is not only when moving between cells, but also when the mobile communication terminal 2 (or communication module or wireless communication terminal 5) is turned on. Also do it. As a result, it is possible to receive from the authentication server the presence or absence of a remote lock instruction that occurred during the period when the power of the mobile communication terminal 2 was turned off, and it is possible to always check the security state during the conventional location registration operation. It becomes possible.

  FIG. 6 is a flowchart showing a first processing method in the remote lock system 1A of the present invention. This flowchart shows the most basic remote lock processing method in the mobile communication terminal 2 shown in FIG. Note that the flowchart shown in FIG. 6 can be similarly applied to a case where a communication terminal is configured by the communication module 3 and the functional terminal 4 shown in FIG. 4, and also by the wireless communication terminal 5 and the information processing terminal 6 shown in FIG. 5. The same applies to the case of configuring a communication terminal.

  Hereinafter, the flow of the processing will be described with reference to FIG.

  First, the mobile communication terminal 2 is powered on (step S11). The mobile communication terminal 2 starts location registration (step S12), and determines whether or not the remote lock state instruction information is received from the communication network in the authentication phase (step S13).

  If it is determined in step S13 that remote lock instruction information has been received (the process proceeds to step S28 and communication is terminated. If it is determined that remote lock instruction information has not been received, position registration is continued (step S13). S14).

  When the location registration is completed, the mobile communication terminal 2 ends the communication (step S15) and enters a standby state (step S21).

  The mobile communication terminal 2 detects whether or not a communication request (transmission request) has been made in the standby state of step S21 (step S22). If a communication request is detected, the process proceeds to step S24. If no communication request is detected, the start of location registration of the mobile communication terminal 2 itself is detected (step S23). If the start of location registration is detected, the process proceeds to step S24. If the start of location registration is not detected, the process returns to step S22.

  When a communication request is detected in step S22 or the start of location registration is detected in step S23, communication between the mobile communication terminal 2 and the communication network 40 is started (step S24). With the start of communication, an authentication phase between the mobile communication terminal 2 and the communication network 40 is performed. In this authentication phase, the mobile communication terminal 2 determines whether or not remote lock instruction information has been received from the communication network 40. (Step S25). If the mobile communication terminal 2 does not receive the remote lock instruction information, the mobile communication terminal 2 continues the communication as it is (step S26). When the communication is completed (step S27), the mobile communication terminal 2 returns to step S21 and enters the standby state again.

  In the authentication phase of step S25, when it is determined that the mobile communication terminal 2 has received the remote lock instruction information from the communication network 40, the mobile communication terminal 2 immediately ends the communication (step S28), and the remote lock operation flag 32 is turned on (step S29), the switch (SW1) 25 is turned off (OFF), and the access function to the user data 31 is stopped (step S30). Thereby, a standby state is complete | finished and the mobile communication terminal 2 is locked (step S31).

  According to such a processing procedure, when there is a transmission request and a location registration request from the mobile communication terminal 2, the remote lock instruction information can be transmitted from the communication network 40 side. For this reason, it is possible to perform remote lock (stop of user data access function, stop of input / output function, etc.) to the stolen mobile communication terminal 2 more quickly and reliably. Further, it is not necessary to periodically send a remote lock signal from another mobile communication terminal or a base station to the stolen mobile communication terminal 2, and the load on the communication network 40 can be reduced.

  The unlocking of the remotely locked mobile communication terminal 2 is performed by releasing the remote lock when, for example, the remote lock instruction is not received (or the remote lock release instruction is received) in step S13 or step S25. To do.

[Description of Second Processing Method in Remote Lock System 1A]
As a timing for starting the location registration, a timer is provided in the mobile communication terminal 2 so that the mobile communication terminal 2 voluntarily performs location registration when communication is not performed for a certain period of time. Thereby, access to the network occurs within a certain time, and the remote lock information is transmitted to the mobile communication terminal 2.

  FIG. 7 is a flowchart showing a second processing method in the remote lock system 1A of the present invention. This flowchart shows the flow of processing in the mobile communication terminal 2 shown in FIG. 3, and shows the flow of processing when the mobile communication terminal 2 voluntarily makes a call request. The flowchart shown in FIG. 7 shows the flow of processing in the mobile communication terminal 2 shown in FIG. 3, but when the mobile communication terminal is configured by the communication module 3 and the functional terminal 4 shown in FIG. The present invention can be similarly applied to a case where the wireless communication terminal 5 and the information processing terminal 6 shown in FIG.

  The flowchart shown in FIG. 7 includes steps S23A and S27A newly added to steps S21 (standby state) to step S31 (standby end) of the flowchart shown in FIG. The newly added processing step will be described.

  In step S23A, the mobile communication terminal 2 starts communication with the communication network 40 when the measurement time of the timer for measuring the communication interval expires when there is no transmission from the mobile communication terminal 2 for a certain period of time. It is. In step S27A, when communication is terminated without receiving a stop request signal from the communication network 40 (step S27), the communication interval measurement timer is restarted.

  By such a processing procedure, a timer is provided in the mobile communication terminal 2 for measuring a time during which no transmission is made by the mobile communication terminal 2, and when the measurement time of this timer expires, the mobile communication terminal 2 A call origination request can be made to the communication network 40. As a result, remote lock (stop of user data access function, stop of input / output function, etc.) can be performed on the stolen mobile communication terminal 2 more quickly and reliably. Further, it is not necessary to periodically send a remote lock signal from another mobile communication terminal or a base station to the stolen mobile communication terminal 2, and the load on the communication network 40 can be reduced.

[Description of Third Processing Method in Remote Lock System 1A]
Further, as a method for increasing the call opportunity of the mobile communication terminal 2, if no key input is made for a predetermined time in the mobile communication terminal 2 shown in FIG. 3, the call or location registration is performed at the next key access. . As a result, the security state can be confirmed and the remote lock operation can be performed during an operation that may be illegally used.

  FIG. 8 is a flowchart showing a third processing method in the remote lock system 1A of the present invention. This flowchart shows the flow of processing in the mobile communication terminal 2. The flowchart shown in FIG. 8 shows the flow of processing in the mobile communication terminal 2 shown in FIG. 3. However, when the mobile communication terminal is configured by the communication module 3 and the functional terminal 4 shown in FIG. The present invention can be similarly applied to a case where the wireless communication terminal 5 and the information processing terminal 6 shown in FIG.

  In the flowchart shown in FIG. 8, the portions surrounded by broken lines (steps S24 to S31) are common to the flowchart shown in FIG. 6, and steps S41, S42, and S43 are characteristic portions in this processing flow. .

  Initially, the mobile communication terminal 2 is in a key input detection state (step S41). And the count of the timer which measures the time when key input operation was not performed for a fixed time is started. Then, it is determined whether or not the timer measurement time has expired (step S42). If it is determined that the timer measurement time has not expired, the process returns to step S42 to detect key input and normal operation. Continue.

  When the key input is detected and it is determined in step S42 that the timer has expired, the mobile communication terminal 2 starts communication (step S24). Thereafter, processing similar to the processing steps S24 to S31 shown in FIG. 6 is performed, and the mobile communication terminal 2 is remotely locked.

  In step S43, in the authentication phase (step S25), when the communication is terminated without receiving the remote lock instruction signal information from the communication network (step S27), the key input detection timer is restarted.

  By such a processing procedure, a timer is provided for measuring a time during which no key input is performed in the mobile communication terminal 2, and when the measurement time of this timer expires, the communication network 40 is instructed at the next key input. To make an outgoing call request. As a result, remote lock (stop of user data access function, stop of input / output function, etc.) can be performed on the stolen mobile communication terminal 2 more quickly and reliably. In addition, it is not necessary to periodically transmit a remote lock signal from another mobile communication terminal or base station to the stolen mobile communication terminal 2, and the load on the communication network 40 can be reduced.

[Description of processing method in remote lock system 1B when terminal is composed of functional terminal and communication module]
The flowcharts shown in FIGS. 6, 7, and 8 not only show the flow of processing in the mobile communication terminal 2 shown in FIG. 3, but also the method is moved by the communication module 3 and functional terminal 4 shown in FIG. 4. Although it can be similarly applied to the case where a communication terminal is configured, the basic processing flow in the configuration example (configured by the communication module 3 and the functional terminal 4) of the remote lock system 1B shown in FIG. I will explain.

  9 is a flowchart showing the flow of processing in the communication module 3 shown in FIG. 4, and FIG. 10 is a flowchart showing the flow of processing in the functional terminal 4 shown in FIG. The processing flow will be described below with reference to FIGS.

  Referring to FIG. 9, first, communication module 3 is in a standby state (step S111). Then, the function terminal 4 detects whether a communication request (such as a transmission request) has been made (step S112). If a communication request is detected, the process proceeds to step S114. If the communication request is not detected, the communication module 3 detects the start of its own location registration (step S113). If the start of location registration is detected, the process proceeds to step S114. If the start of location registration is not detected, the process returns to step S112 and enters a standby state.

  When a communication request is detected in step S112 or the start of location registration is detected in step S113, communication between the communication module 3 and the communication network 40 is started (step S114). With the start of communication, an authentication phase between the communication module 3 and the communication network 40 is performed. In this authentication phase, the communication module 3 determines whether or not remote lock instruction information has been received from the communication network 40 ( Step S115). If the communication module 3 does not receive the remote lock instruction information from the communication network 40, the communication is continued as it is (step S116). When the communication is completed (step S117), the process returns to step S112, and again enters the standby state. Become.

  In the authentication phase of step S115, when it is determined that the remote lock instruction information has been received from the communication network 40 by the communication module 3, the communication module 3 immediately ends the communication (step S118) and sets the remote lock operation flag 32. It is turned on (step S119). Then, the value of the remote lock operation flag 32 is transmitted to the functional terminal 4 (step S120), and the standby is completed (step S121).

  Next, the flow of processing in the functional terminal 4 will be described with reference to FIG. First, the functional terminal body 4 is in a standby state (step S131). The functional terminal 4 determines whether or not the remote lock operation flag 32 signal transmitted from the communication module 3 has been received (step S132). When the signal of the remote lock operation flag 32 is received, the switch (SW1) 25 is turned off (step S133), and the access function to the user data 31 is stopped (step S134). Then, the standby state is terminated and the function terminal 4 itself is locked (step S135).

  According to such a processing procedure, when the communication terminal is composed of the communication module 3 and the functional terminal 4, when there is a transmission request and a location registration request from the terminal side, the remote lock instruction information is transmitted from the communication network 40 side. Then, the function terminal 4 can be locked.

[Description of processing method in remote lock system 1C when terminal is composed of wireless communication terminal and information processing terminal]
The flowcharts shown in FIGS. 6, 7, and 8 not only show the flow of processing in the mobile communication terminal 2 shown in FIG. 3, but also the method is based on the wireless communication terminal 5 and the information processing terminal 6 shown in FIG. However, here, the basic processing in the communication terminal (communication terminal constituted by the wireless communication terminal 5 and the information processing terminal 6) shown in FIG. 5 is applicable. The flow of will be described.

  FIG. 11 is a flowchart showing the flow of processing in the wireless communication terminal (PHS data communication card or the like) 5 shown in FIG. 5, and FIG. 12 shows processing in the information processing terminal (PC or PDA or the like) 6 shown in FIG. It is a flowchart which shows a flow. Hereinafter, the flow of the process will be described with reference to FIGS. 11 and 12.

  Referring to FIG. 11, first, wireless communication terminal 5 is in a standby state (step S141). Then, the information processing terminal 6 detects whether or not a communication request (such as a transmission request) has been made (step S142). If a communication request is detected, the process proceeds to step S144. If the communication request is not detected, the wireless communication terminal 5 detects the start of its own location registration (step S143). If the start of location registration is detected, the process proceeds to step S144. If the start of location registration is not detected, the process returns to step S142 and enters a standby state.

  When a communication request is detected in step S142 or the start of location registration is detected in step S143, communication between the wireless communication terminal 5 and the communication network 40 is started (step S144). With the start of communication, an authentication phase is performed between the wireless communication terminal 5 and the communication network 40. In this authentication phase, the wireless communication terminal 5 determines whether or not remote lock instruction information has been received from the communication network 40. (Step S145). If the wireless communication terminal 5 does not receive the remote lock instruction information from the communication network 40, the communication is continued as it is (step S146). When the communication is completed (step S147), the process returns to step S142, and again in the standby state. It becomes.

  In the authentication phase of step S145, when it is determined that the remote lock instruction information has been received from the communication network 40, the wireless communication terminal 5 immediately terminates communication (step S148) and turns on the remote lock operation flag 32 (ON). (Step S149), the switch (SW2) 27 is turned off (OFF), and access to the key data is stopped (Step S150). Then, reception of the remote lock instruction information is confirmed (step S151), and the value of the remote lock operation flag 32 is transmitted to the information processing terminal 6 (step S152). Then, the standby is terminated (step S153).

  Next, the flow of processing in the information processing terminal 6 will be described with reference to FIG. The information processing terminal 6 starts the bootstrap program together with the power ON (step S161), and then starts the OS (step S162). Next, the driver information of the wireless communication terminal 5 is read (step S164).

  The remote lock state of the wireless communication terminal 5 is confirmed (step S165), and it is determined whether a remote lock signal (remote lock instruction information) is received from the wireless communication terminal 5 (step S166).

  If it is determined in step S166 that the remote lock signal has not been received, login is permitted (step S167), and the information processing terminal 6 can be used normally (step S168).

  If it is determined in step S166 that the remote lock signal has been received, the switch (SW1) 25 is turned off (step S169), access to the user data 31 is stopped (step S170), and information processing is performed. The terminal 6 is locked (step S171).

  With such a processing procedure, when the terminal is composed of the wireless communication terminal 5 and the information processing terminal 6, when there is a transmission request and a location registration request from the terminal side, the remote lock instruction information is received from the communication network 40 side. The information processing terminal 6 can be locked by transmitting.

[Description of processing method on communication network 40 side in remote lock system]
Next, the flow of processing on the communication network 40 side in the remote lock system 1A shown in FIG. 3 will be described. FIG. 13 is a flowchart showing a processing flow on the communication network 40 side in the remote lock system of the present invention. The flowchart shown in FIG. 13 is similarly applied to the remote lock systems 1B and 1C shown in FIGS.

  Hereinafter, the flow of the processing will be described with reference to FIG.

  Initially, the communication network 40 is in a standby state (step S201). When a regular user receives a request to stop using the mobile communication terminal 2 (step S202), the remote lock state of the subscriber information database 46 of the target user's mobile communication terminal 2 (the lock shown in FIG. 15). The instruction state is changed (step S203).

  Thereafter, a communication request from the mobile communication terminal 2 is detected (step S204). When there is a communication request, communication with the mobile communication terminal 2 is started (step S205), and an authentication request is sent to the mobile communication terminal 2. Is transmitted (step S206), and an authentication response is received from the mobile communication terminal 2 (step S207). The communication network 40 refers to the subscriber information database 46 based on the authentication response information received from the mobile communication terminal 2 and sets the remote lock state of the mobile communication terminal 2 (step S208). Remote lock instruction information is transmitted (step S209), and the communication process is terminated (step S210).

  For unlocking the mobile communication terminal 2 that has been remotely locked, for example, in step S209, a response signal to which no remote lock instruction information is added is transmitted, or a response signal to which remote lock release instruction information is added is transmitted. As a result, the mobile communication terminal 2 is unlocked.

  FIG. 14 is a diagram showing a flow of terminal lock control in which remote lock / unlock instruction information is transmitted from the communication network side to the mobile communication terminal 2.

  First, a case where the terminal is locked will be described.

  First, a setting for remotely locking the mobile communication terminal 2 to the authentication server 52 on the communication network side is performed according to a user request (step S50).

  Subsequently, a call setting request is generated from the mobile communication terminal 2 to the communication network side (step S51).

  On the communication network side, in the connection sequence, a request for authentication is issued to the mobile communication terminal 2 to determine whether the connection source mobile communication terminal 2 is valid (step S52).

  The mobile communication terminal 2 returns a response to the authentication request (step S53).

  On the communication network side, after the called user call is started, a call message is issued to the mobile communication terminal 2 (step S54). The mobile communication terminal 2 is instructed to perform remote lock depending on whether or not a UUI (User to User Information) message instructing remote lock is added to the call message (or the message content).

  The mobile communication terminal 2 that has received the remote lock instruction locks the mobile communication terminal 2 by stopping or erasing user data or stopping the input / output unit in accordance with a preset remote lock mode. (Step S55).

  In step S50, the remote lock of the mobile communication terminal 2 that has been remotely locked is set in the authentication server 52 on the communication network side to release the lock of the mobile communication terminal 2 in response to a user request. The message is transmitted without adding a message, or the content of the UUI message is assumed to mean that.

  In the communication system described with reference to FIG. 1 and FIG. 2 as the timing for instructing a stop / cancel request, the authentication is completed, for example, added to the position registration reception 101 in the position registration sequence of the cordless telephone shown in FIG. After that, it is transmitted to the mobile communication terminal 2 at a stage before disconnecting the radio channel.

  Further, the timing for transmitting the stop / cancel request in the communication system described in FIG. 14 is, for example, added as a UUI message to the CC call 102 in the control sequence at the time of batch transmission by the cordless telephone shown in FIG. The data is transmitted to the mobile communication terminal 2 after the authentication is completed and before the call connection.

  Thereby, transmission of the remote lock instruction information to the mobile communication terminal 2 can be performed without imposing a burden on the communication network in the conventional connection sequence.

As described above, the embodiment of the present invention has been described. However, if the communication terminal is left out of service area where communication with the communication network 40 is not possible, a stop request signal cannot be transmitted from the communication network 40 to the communication terminal. As a security measure in this case, password information may be held in the communication terminal, and a password input may be requested when the communication terminal is used. As a result, when the communication terminal is within a communicable area, a stop request signal is transmitted and locked, and when the communication terminal is out of the area, a password input is required to further enhance security.
FIG. 18 is a diagram showing a hardware configuration example of a mobile communication terminal for realizing the above operation of the remote lock system of the present invention. In FIG. 18, the description of the same components as those in FIG. 3 is omitted here. For the same reason, description of the communication network 40 is also omitted.

  The base station detection unit 60 in the control unit 20A of the mobile communication terminal 2A searches the base station by the transmission / reception control unit 21, detects a communicable base station, and outputs the result to the function management unit 24. The communication network detection unit 61 detects whether the communication network of the base station detected by the base station detection unit 60 is a communication network that supports remote lock, and outputs the result to the function management unit 24 in the same manner.

  The function management unit 24 that has input the result that the base station is not detected from the base station detection unit 60 determines that the mobile communication terminal 2A is out of the communication range. In addition, the function management unit 24 that has input from the communication network detection unit 61 a result indicating that the detected communication network of the base station is not a communication network that supports remote lock, the mobile communication terminal 2A does not support remote lock. It is determined that it is in a communication network. The function management unit 24 that has determined that the mobile communication terminal 2A is out of the communication area or in the communication network not compatible with the remote lock, notifies the user that the mobile communication terminal 2A is out of the communication area or in the communication network not compatible with the remote lock, and A message is displayed on the display unit 12 to prompt input.

  A user who has been notified that the communication network is out of communication range or in a communication network that does not support remote lock inputs a predetermined password through the key input unit 11 and the voice input / output unit 13. The input password is input to the password determination unit 62 via the function management unit 24 and compared with a password stored in advance in the password storage unit 34 in the nonvolatile memory 30A. As a result, if the input password is authentic, the mobile communication terminal 2A performs the normal operation as it is.

  On the other hand, if the input password is different from the predetermined password, the password determination unit 52 determines that the password is an unauthorized password, and outputs the result to the lock function unit 23. When the password determination unit 62 detects an illegal password input, the lock function unit 23 turns off the switch (SW1) 25, stops the access function to the user data 31 thereafter, and performs mobile communication. Various operations of the terminal 2A are locked to disable use.

FIG. 19 is a flowchart showing the basic operation of another embodiment of the present invention. This flowchart is shown with reference to the most basic lock processing method in the mobile communication terminal 2A shown in FIG.
In the mobile communication terminal 2A, after the power is turned on, a base station search is started (step S300). If a base station can be found by the base station search in step S300, normal communication is started (steps 301 and 302).

  When the base station is not found in step 301, it is determined that the mobile communication terminal 2A is out of the communication range, and the user is prompted to input a password (step S303). When the user who is prompted to input a password inputs a predetermined password, it is determined whether or not the input password is authentic (step S304). In step S304, if the input password is valid, the mobile communication terminal 2A performs the normal operation as it is (step S305). On the other hand, when it is determined that the input password is not a legitimate one but an illegal one, the function of the mobile communication terminal 2A is stopped (step S306).

FIG. 20 is a flowchart for explaining the operation shown in FIG. 19 in more detail.
When the power of the mobile communication terminal 2A is turned on (step S400), it is first determined whether the remote lock operation flag 32 in the nonvolatile memory 30A is on (ON) or off (OFF) (step S401). When the remote lock operation flag 32 is on (ON), the switch (SW1) 25 is turned off (OFF) (step S471), access to the user data 31 is stopped (step S472), and the mobile communication terminal 2A is locked. Then, the standby state is terminated (step S473).

In step S401, after it is determined that the remote lock operation flag 32 is off (OFF), the mobile communication terminal 2A starts a timer (step S402), determines whether the timer has expired (step S403), and the time is up. The reception state at that time is read (step S404).
After determining that the remote lock operation flag 32 is off (OFF), the mobile communication terminal 2A starts a base station search (step S460). In step S460, the success or failure of the base station search is determined in step S461. If the base station cannot be found, it is determined that the base station search result is unsuccessful (step S462). On the other hand, when the base station is found in step S461, it is determined that the base station search is successful (step S463). If the base station search is successful in step S463, a location registration operation is started (step S464), and it is determined whether or not the communication network of the base station that has succeeded in the search is compatible with remote lock (step S465). . If the communication network of the base station that has succeeded in the search does not support remote lock in step 464, the location registration is continued as it is (step S467), and the communication is terminated (step S468).

  On the other hand, when the communication network of the base station that has succeeded in the search supports remote lock, it is determined whether or not a remote lock instruction is received in the authentication phase (step S466), and if the remote lock instruction is not received. The position registration operation is continued (step S467), and communication is terminated (step S468). If it is determined in step S466 that a remote lock instruction has been received, communication is terminated (step S469), and the remote lock operation flag 32 is turned on (step S470). Next, the switch (SW1) 25 is turned off (step S471), access to the user data 31 is stopped (step S472), the mobile communication terminal 2A is locked, and the standby state is ended (step S473). .

  The communication state of the mobile communication terminal 2A shown in steps S461, S462, S465, S468, and S470 is sequentially stored in step S450. For example, the reception states are “base station search unsuccessful”, “remote lock not supported”, “remote lock instruction received”, “remote lock instruction not received”. Although the base station search is described as being performed once here, it may be performed at regular intervals using a timer or the like.

  In step S404, the reception state stored in step S450 is read, and in step S405, the reception state is determined. As a result, when it is determined that the result of the reception state is not output, the timer is reset and restarted (step S406), and the process returns to step S403.

  On the other hand, if it is determined in step S405 that there is a reception status result, it is then determined whether reception has succeeded as a result of the base station search (step S407). If the communication state is not successful in the base station search in step S407, a password input request is displayed on the display unit 12 to prompt the user to input a predetermined password (step S408). Next, the presence / absence of a password input from the key input unit is detected (step S409). If no password is input, the function of the mobile communication terminal 2A is locked (step S411).

  When the password is input from the user, the password determination unit 62 checks the password stored in the password storage unit 34 in advance (step S410). If the input password is correct, the mobile communication terminal 2A is checked. The normal operation is performed (step S411). On the other hand, if the input password is illegal compared to the stored password in step S410, the function of the mobile communication terminal 2A is locked (step S412).

  If it is determined in step S407 that the search for the base station has been successful, it is then determined whether or not the communication network of the base station that has succeeded in the search supports remote lock (step S413). If the remote lock is supported, the mobile communication terminal 2A performs a normal operation (step S414). On the other hand, if the remote lock is not supported, the process proceeds to step S408, and authentication processing using a password shown in steps S408 to S412 is performed.

  The configuration for requesting password entry when out of communication range as described above has been described based on the embodiment of the present invention shown in FIG. 3, but the configuration of another embodiment of the present invention shown in FIG. 4 and FIG. However, it goes without saying that it can be similarly implemented.

  FIG. 21 is an embodiment in which the embodiment of the present invention comprising the mobile communication terminal and the information processing terminal shown in FIG. 5 is configured to input a password when out of communication range. In FIG. 21, the description of the same components as those in FIG. 5 is omitted here. For the same reason, description of the communication network 40 is also omitted.

  The base station detection unit 60 in the wireless communication terminal 5A inputs to the reception state detection unit 63 the success or failure of the detection of the base station, the correspondence with the remote lock of the communication network 40, and the presence / absence of reception of the remote lock instruction from the communication network 40. To do. The reception state detection unit 63 receives a command from the reception state reading unit 70 in the information processing terminal 6A, determines whether or not the base station has been successfully detected, the remote lock of the communication network 40, and the remote lock instruction from the communication network 40. Answer whether or not received. The reception state reading unit 70 determines the answer from the reception state detection unit 63. For example, if the wireless communication terminal 5A has not found a base station, it is determined that the wireless communication terminal 5A and the information processing terminal 6A are outside the communication area of the communication network 40.

  When the reception state reading unit 70 detects that the wireless communication terminal 5A is out of the communication area or in the communication network area that does not support remote lock, the function management unit 24 causes the display unit 12 to notify the user Or, it announces that it is in a communication area that does not support remote lock, and prompts for a password. The user who is notified that the communication area is out of the communication area or the communication area not compatible with the remote lock is the same as the password stored in the password storage unit 34 of the wireless communication terminal 5A by the password output control unit 73 of the information processing terminal 6A, or The associated password is input by the key input unit 11. The input password is determined by the password input control unit 72 by the password read from the password storage unit 34 of the wireless communication terminal 5A and the password determination unit 62A. The input password is compared with the stored password, and if the input password is authentic, the information processing terminal 6A performs normal operation.

  On the other hand, when the password is not input or when the input password is an illegal password, the password determination unit 62A determines that the password is invalid and outputs the result to the lock control unit 26. When an unauthorized password input is detected from the password determination unit 62A, the lock control unit 26 turns off the switch (SW1) 25, stops access to the user data 31 in the nonvolatile memory 30B, and performs information processing. Various operations of the terminal 6A are locked, and the information processing terminal 6A cannot be used.

  If the reception state reading unit 70 does not detect reception of the remote lock instruction from the communication network 40, the key data 33 in the wireless communication terminal 5A is transferred via the switch (SW2) 27 and the lock control unit 26A. Is input to the key data detection unit 71 of the information processing terminal 6A and is compared by the key data determination unit 74 with the key data 33A in the information processing terminal 6A. If the result of collation between the key data 33A in the information processing terminal 6A and the key data 33 in the wireless communication terminal 5A is valid, the information processing terminal 6A performs a normal operation. On the other hand, if the result of collation is illegal, the lock control unit 26 makes the information processing terminal 6A unavailable.

FIG. 22 is a flowchart for explaining in detail the operation of the embodiment shown in FIG.
First, the information processing terminal 6A and the wireless communication terminal 5A are powered on (step S501). In the wireless communication terminal 5A, it is determined whether or not the remote lock operation flag 32 in the nonvolatile memory 30A is on (ON) (step S502). When the remote lock operation flag 32 is on (ON), the switch (SW2) 27 is turned off (OFF) (step 571), the access to the key data 33 is stopped (step S572), and the lock control of the information processing terminal 6A is performed. The switch (SW1) 25 is turned off by the unit 26 (step S573), and access to the user data 31 is stopped (step S574). As a result, the standby state is terminated, the hard key function is stopped, and the information processing terminal 6A is locked (step S575).

In step S402, after it is determined that the remote lock operation flag 32 is off (OFF), the information processing terminal 6A starts a timer (step S503), determines whether the timer has expired (step S504), and the time is up. Then, a command for inquiring the reception state to the wireless communication terminal 5A is output (step S505).
After determining that the remote lock operation flag 32 is off (OFF), the wireless communication terminal 5A starts a base station search (step S560). The success or failure of the base station search is determined in step S561 in the base station search in step S560, and if the base station cannot be found, it is determined that the base station search result is unsuccessful (step S562).

  On the other hand, if a base station is found in step S561, it is determined that the base station search is successful (step S563). If the base station search is successful in step S563, a location registration operation is started (step S564), and it is determined whether or not the communication network of the base station that has succeeded in the search is compatible with remote lock (step S565). . If the communication network of the base station that has succeeded in the search does not support remote lock in step 564, the location registration is continued as it is (step S567), and the communication is terminated (step S568).

  On the other hand, if the communication network of the base station that has succeeded in the search supports remote lock, it is determined whether or not a stop request is received in the authentication phase (step S566), and if the remote lock operation request is not received. The position registration operation is continued (step S567), and the communication is terminated (step S568).

  If it is determined in step S566 that a remote lock instruction has been received, communication is terminated (step S569), and the remote lock operation flag 32 is turned on (step S570). Next, the switch (SW2) 27 is turned off (OFF) (step 571), the access of the key data 33 is stopped (step S572), and the switch (SW1) 25 is turned off (OFF) by the lock control unit 26 of the information processing terminal 6A. (Step S573), and access to the user data 31 is stopped (Step S574). As a result, the standby state is terminated, the hard key function is stopped, and the information processing terminal 6A is locked (step S575).

  The communication state of the wireless communication terminal 5A shown in steps S562, S565, S568, and S570 is sequentially stored in step S550. For example, the reception states of the wireless communication terminal 5A are “base station search unsuccessful”, “remote lock not supported”, “remote lock instruction received”, “remote lock instruction not received”. Although the base station search is described as being performed once here, it may be performed at regular intervals using a timer or the like.

  The reception state detection unit 63 of the wireless communication terminal 5A that has input a command for inquiring the reception state from the reception state reading unit 70 of the information processing terminal 6A in step S505 (step S451), the wireless communication terminal stored in step S550 above A command for answering the information processing terminal 6A with the reception state of 5A is output (step S552).

  In step S552 of the wireless communication terminal 5A, the information processing terminal 6A that has input the reception state of the wireless communication terminal 5A from the reception state detection unit 63 to the reception state reading unit 70 with a reply command (step S516) is received by the wireless communication terminal 5A. The state is determined (step S517). As a result, if it is determined that the reception state result is not output, the timer is reset and restarted (step S518), and the process returns to step S504.

  On the other hand, when it is determined that the command input from the wireless communication terminal 5A has a result of the reception state, next, as a result of the base station search, it is determined whether the reception is successful and whether the remote lock is supported. Determination is made (step S519). In step S519, if the communication state of the wireless communication terminal 5A is not successful in the base station search, or is a communication network that does not support remote lock even if the base station search is successful, a predetermined password is input to the user. A password input request is displayed on the display unit 12 to prompt the user (step S520).

  Next, the presence / absence of a password input is detected (step S521), and if the password is not input, the function of the information processing terminal 6A is stopped (step S524). When the password is input from the user, the password is collated with a previously stored password (step S522). If the input password is correct, the information processing terminal 6A is normally operated (step S523). On the other hand, if it is determined in step S522 that the input password is illegal compared to the stored password, the function of the information processing terminal 6A is stopped (step S524).

If it is determined in step S519 that the communication state of the wireless communication terminal 5A has succeeded in the base station search and the communication network is compatible with remote lock, it is then determined whether or not a remote lock instruction has been received ( Step S525). When the remote lock instruction is received, the function of the information processing terminal 6A is stopped (step S530). When the remote lock instruction has not been received, the key data 33 is read from the wireless communication terminal 5A, and the key data 33A is read from the information processing terminal 6A (step S526), and each key data is inquired (step S527). . As a result, when it is determined that both key data are authentic (step S528), the information processing terminal 6A is normally operated (step S429). On the other hand, if it is determined in step S528 that the key data is not authentic as a result of the collation, the function of the information processing terminal 6A is stopped (step S530).
In the embodiment of FIG. 21, the password storage unit 34 is provided in the wireless communication terminal 5A and the password determination unit 62A is provided in the information processing terminal 6A. However, the configuration is not limited to FIG.

FIG. 23 is a hardware configuration diagram illustrating an example in which a password storage unit is provided in the information processing terminal.
The information processing terminal 6B is provided with a password storage unit 34A. In the password storage unit 34A, as in the password storage unit 34 of FIG. 21, a password is stored in advance by a user or the like, and when the communication status reading unit 70 detects that the communication network is out of communication range or does not support remote lock of the communication network, The password input from the key input unit 11 is compared with the password determination unit 62A.

FIG. 24 is a hardware configuration diagram illustrating an example in which both a password storage unit and a password determination unit are provided in a wireless communication terminal.
The wireless communication terminal 5C includes a password storage unit 34 and a password determination unit 62B. In the password storage unit 34, a password is previously stored by a user or the like by the password output control unit 73 of the information processing terminal 6C. When the reception state detection unit 63 of the wireless communication terminal 5C detects that the communication network outside the communication range or the detected base station communication network is not compatible with remote lock, the switch (SW2) 27 is turned off. (OFF) and the use of the key data 33 is stopped. When the switch (SW2) 27 is off (OFF), the lock control unit 26A refuses to provide key data to the key data detection unit 71 of the information processing terminal 6C, and the lock control unit 26 sets the information processing terminal 6C. Lock. In the information processing terminal 6C, when the reception state reading unit 70 detects that the communication network is out of the communication range or the detected base station communication network is a communication network that does not support remote lock, the password input is displayed on the display unit 12. The user is requested by

  The password input from the key input unit 11 by the user is output by the function management unit 24 to the password determination unit 62B of the wireless communication terminal 5C. The password determination unit 62B compares the input password with the password stored in the password storage unit 34. If the password is a legitimate password, the switch (SW2) 27 is turned on (ON), and the information processing terminal 6C The key data is supplied to the key data detecting unit 71, the lock control unit 26 unlocks the information processing terminal 6C, and the information processing terminal 6C performs a normal operation.

On the other hand, if the input password is illegal compared to the password stored in the password storage unit 34, the switch (SW2) 27 remains off (OFF) and the key data 33 is accessed. At the same time, the lock control unit 26 of the information processing terminal 6C turns off the switch (SW1) 25, stops the access of the user data 31, and stops the function of the information processing terminal 6C.
The operations of the configuration of the embodiment of the present invention shown in FIGS. 23 and 24 are the same as those in the flowchart shown in FIG.

The example of controlling the remote lock of the information processing terminal by inputting the password has been described above. However, as the password here, a predetermined character string input from the keyboard or biometric authentication information such as a fingerprint can be used. Furthermore, the password is not limited to the type of information, and various types of authentication information and combinations thereof can also be used.
In addition, when the mobile communication terminal 2 has a data storage unit, when it is stolen, the data storage unit may be removed by a third party and the stored contents may be decrypted. As a countermeasure in this case, the information on the encryption key is held in the mobile communication terminal 2 and the information recorded in the data storage unit is encrypted with this encryption key, so that the mobile communication terminal 2 can be remotely locked from the communication network 40 side. When the instruction is received, the encryption key information may be locked or deleted.
FIG. 25 is a diagram illustrating a hardware configuration example of the remote lock system when the information to be recorded in the data storage unit is encrypted. In addition, description of the part which overlaps with FIG. 3 is abbreviate | omitted here.

The encryption key information reading unit 80 of the mobile communication terminal 2B is a processing unit that detects the encryption key information 35. In the data storage unit 82 composed of a hard disk, a non-volatile memory, or the like, the data encrypted by the data encryption unit 81 is stored according to the encryption key detected by the encryption key information reading unit 80.
Normally, the encrypted data is decrypted by the data decryption unit 83 in accordance with the encryption key detected by the encryption key information reading unit 80 and can be used by the user.

  User data 31, a remote lock operation flag 32, and encryption key information 35 are recorded in the nonvolatile memory 30A of the mobile communication terminal 2B.

  The transmission / reception control unit 21 is a processing unit for wirelessly transmitting / receiving data to / from the communication network. The remote lock presence / absence determination unit 22 performs a process of determining whether or not a signal received from the communication network 40 via the transmission / reception control unit 21 includes a remote lock instruction signal (signal for instructing operation lock). .

When it is determined that the remote lock instruction signal is not included, the remote lock presence / absence determination unit 22 performs a process of turning off the remote lock operation flag 32. On the other hand, if it is determined that a remote lock instruction signal is included, processing for turning on the remote lock operation flag 32 is performed. At the same time, the encryption key information 35 in the nonvolatile memory 30A may be erased.
When the remote lock operation flag 32 is turned on (ON), the lock function unit 23 turns off the switch (SW1) 25 and the switch (SW3) 64.

  When the switch (SW3) 64 is off (OFF), the encryption key information control unit 65 refuses to provide the encryption key information 35 to the encryption key information reading unit 80. When the switch (SW 3) 64 is on, the encryption key information 35 is read and sent to the encryption key information reading unit 80.

  FIG. 26 is a flowchart showing a processing method in the remote lock system of the present invention for encrypting data. This flowchart shows the processing after step S28 of the flowchart shown in FIG. 6, and the other processing is the same as that in FIG.

  When it is determined that the mobile communication terminal 2B has received a remote lock instruction signal from the communication network, the mobile communication terminal 2B immediately terminates communication (step S28) and turns on (ON) the remote lock operation flag 32 ( In step S600, the switch (SW1) 25 is turned off (OFF), access to the user data 31 is stopped (step S601), the standby state is terminated, and the mobile communication terminal 2B is locked. Further, the switch (SW3) 64 is turned off (step S602), the use of the encryption key information 35 is stopped, and the decryption of the data stored in the data storage unit 82 is stopped (step S603).

  By such a processing procedure, it becomes impossible to decrypt the data stored in the mobile communication terminal 2B by receiving a remote lock instruction signal (lock signal for stopping the function of the mobile communication terminal 2B) from the communication network 40 side. Thus, it is possible to improve the confidentiality of data for the stolen mobile communication terminal 2B.

  Thus, the configuration in which the data is encrypted and stored, and the use of the encryption key is stopped by receiving the remote lock instruction signal from the communication network side is not limited to the embodiment of FIG. 3, and FIG. 4 and FIG. The embodiment shown in FIG.

  As mentioned above, although embodiment of this invention was described, the remote lock system of this invention is not limited only to the above-mentioned example of illustration, A various change can be added in the range which does not deviate from the summary of this invention. Of course. For example, the present invention can be applied not only to mobile communication devices but also to stationary information communication devices.

  In the present invention, remote lock can be performed more quickly and reliably for a stolen communication terminal, and a remote lock signal can be sent from another communication terminal or a base station to a stolen communication terminal. Therefore, the present invention is useful for a remote lock system, a communication terminal, a remote lock method, and the like.

It is a figure for demonstrating the outline | summary of the remote lock system of this invention. It is a figure for demonstrating the release procedure of a remote lock. It is a figure which shows the 1st structural example of the remote lock system of this invention. It is a figure which shows the 2nd structural example of the remote lock system of this invention. It is a figure which shows the 3rd structural example of the remote lock system of this invention. It is a flowchart which shows the 1st processing method in the remote lock system of this invention. It is a flowchart which shows the 2nd processing method in the remote lock system of this invention. It is a flowchart which shows the 3rd processing method in the remote lock system of this invention. It is a flowchart which shows the flow of a process in the communication module shown in FIG. It is a flowchart which shows the flow of a process in the functional terminal shown in FIG. It is a flowchart which shows the flow of a process in the radio | wireless communication terminal shown in FIG. It is a flowchart which shows the flow of a process in the information processing terminal shown in FIG. It is a flowchart which shows the flow of a process by the side of the communication network in the remote lock system of this invention. It is a figure which shows the flow of the terminal lock control which transmits remote lock instruction information from a communication network side to a mobile communication terminal. It is a figure which shows the example of a subscriber information database. It is a figure which shows the addition position of the stop request | requirement / cancellation | release instruction | indication in the position registration sequence in a cordless telephone. It is a figure which shows the addition position of the stop request | requirement / cancellation instruction | indication in the control sequence at the time of the batch transmission by a cordless telephone. It is a figure which shows the other hardware structural example of the remote lock system of this invention. It is a flowchart which shows the outline of the other processing method in the remote lock system of this invention. It is a flowchart which shows the other processing method in the remote lock system of this invention. It is a figure which shows the other hardware structural example of the remote lock system of this invention. It is a flowchart which shows the other processing method in the remote lock system of this invention. It is a figure which shows the other hardware structural example of the remote lock system of this invention. It is a figure which shows the other hardware structural example of the remote lock system of this invention. It is a figure which shows the other hardware structural example of the remote lock system of this invention. It is a flowchart which shows the other processing method in the remote lock system of this invention.

Explanation of symbols

1A, 1B, 1C Remote lock system 2 Mobile communication terminal 3 Communication module 4 Functional terminal 5 Wireless communication terminal 6 Information processing terminal 11 Key input unit 12 Display unit 13 Voice input / output unit 14, 15 I / F unit 20 Control unit 21 Transmission / reception Control unit 22 Remote lock instruction presence / absence determination unit 23 Lock function unit 24 Function management unit 25 Switch (SW1)
26, 26A Lock control unit 27 Switch (SW2)
30, 30A, 30B Non-volatile memory 31 User data 32 Remote lock operation flag 33, 33A Key data 34, 34A Password storage unit 35 Encryption key information 40 Communication network 41 Control unit 42 Transmission / reception control unit 43 Lock information setting unit 44 Subscriber Information control unit 45 Non-volatile memory 46 Subscriber information database 51 Base station 52 Authentication server 60 Base station detection unit 61 Communication network detection unit 62, 62A Password determination unit 63 Reception state detection unit 64 Switch (SW3)
65 Encryption Key Information Control Unit 70 Reception Status Reading Unit 71 Key Data Detection Unit 72 Password Input Control Unit 73 Password Output Control Unit 74 Key Data Determination Unit

Claims (24)

A remote lock system comprising a communication terminal and a communication network through which the communication terminal communicates wirelessly;
In the communication terminal,
Remote lock instruction presence / absence determining whether or not remote lock instruction information is included in a signal received from the communication network when making at least one of a transmission request and a location registration request to the communication network A determination means;
A function management unit that stops at least a user data access function when the remote lock instruction presence / absence determination unit determines that the remote lock instruction information is included;
With
On the communication network side,
A subscriber information database for recording subscriber data of the communication terminal and lock instruction information for the communication terminal;
When receiving at least one of a call origination request or a location registration request from the communication terminal, refer to the subscriber information database, and when the lock instruction information is set, generate the remote lock instruction information, A remote lock system comprising: lock information setting means for transmitting to the communication terminal. On the communication network side,
When at least one of a call origination request or a location registration request is received from the remote-locked communication terminal, the subscriber information database is referred to, and if the lock instruction information for the communication terminal is not set, the remote lock A lock information setting means for generating a signal not including instruction information or generating a signal including remote lock release instruction information and transmitting it to the communication terminal,
In the communication terminal,
When at least one of a call origination request and a location registration request is made to the communication network, a signal received from the communication network does not include remote lock instruction information, or release of the remote lock Remote lock instruction presence / absence determining means for determining whether the instruction information is included;
A function management means for releasing the lock when it is determined by the remote lock instruction presence / absence determination means that remote lock instruction information is not included or remote lock release instruction information is included. The remote lock system according to claim 1. The communication terminal is
A functional terminal,
The remote lock system according to claim 1, further comprising: a communication module configured to be detachably attached to the functional terminal main body and used for communication connection with the communication network. The communication terminal is
An information processing terminal;
2. The wireless communication terminal configured to be detachable or connectable to the information processing terminal and used to connect the information processing terminal to the communication network. The moat lock system according to 2. The communication terminal comprises means for making a location registration request to the communication network at least one of when the communication terminal is powered on or when the communication terminal moves between cells. The remote lock system according to any one of claims 1 to 4. A means for measuring a time during which communication by the communication terminal has not been performed for a predetermined time is provided in the communication terminal, and means for making a transmission request to the communication network when the measurement time of the timer expires The remote lock system according to any one of claims 1 to 5, further comprising: The communication terminal is provided with a timer for measuring a time during which no key input operation is performed in the communication terminal for a certain period of time, and when the measurement time of the timer expires, the communication network is connected to the communication network at the next key input operation. The remote lock system according to any one of claims 1 to 6, further comprising means for making a transmission request. The remote lock system according to any one of claims 1 to 7, wherein reception of remote lock instruction information in the communication terminal is performed in an authentication phase with a communication network. Remote lock instruction information for the communication terminal is:
In the location registration sequence between the communication terminal and the communication module, it is transmitted to the communication terminal after the end of authentication and before the wireless channel disconnection,
9. The remote lock system according to claim 8, wherein the remote lock system is configured to be transmitted to the communication terminal in a control sequence at the time of outgoing call before the call connection after the end of authentication. The apparatus according to claim 1, further comprising: means for detecting that the communication terminal is out of range of the communication network, and when the communication terminal is out of range, controlling the stop of the operation of the communication terminal by inputting a password. Item 10. The remote lock system according to any one of Items 9.   The communication terminal has a data storage unit for encrypting and storing data, and when the remote lock instruction presence / absence determining unit determines that the remote lock instruction information is included, the data in the data storage unit is decrypted The remote lock system according to any one of claims 1 to 10, wherein the remote control is stopped. The communication terminal in a remote lock system configured by a communication terminal and a communication network having a function of transmitting the remote lock instruction information to the communication terminal while the communication terminal performs wireless communication,
Remote lock instruction presence / absence determining whether or not remote lock instruction information is included in a signal received from the communication network when making at least one of a transmission request and a location registration request to the communication network A determination means;
A communication terminal comprising: a function management unit that stops at least a function of accessing user data when the remote lock instruction presence / absence determination unit determines that the remote lock instruction information is included. When making at least one of a call origination request and a location registration request to the communication network, a signal received from the communication network does not include remote lock instruction information, or a remote lock release instruction Remote lock instruction presence / absence determining means for determining whether information is included;
A function management means for releasing the lock when it is determined by the remote lock instruction presence / absence determination means that remote lock instruction information is not included or remote lock release instruction information is included. The communication terminal according to claim 12. The communication terminal is
A functional terminal,
The communication terminal according to claim 12 or 13, further comprising: a communication module configured to be detachable from the functional terminal body and used for communication connection with the communication network. The communication terminal is
An information processing terminal;
14. The wireless communication terminal configured to be detachable or connectable to the information processing terminal and used to connect the information processing terminal to the communication network. The communication terminal described in 1. The communication terminal comprises means for making a location registration request to the communication network at least one of when the communication terminal is powered on or when the communication terminal moves between cells. The communication terminal according to any one of claims 12 to 15. A means for measuring a time during which communication by the communication terminal has not been performed for a predetermined time is provided in the communication terminal, and means for making a transmission request to the communication network when the measurement time of the timer expires The communication terminal according to any one of claims 12 to 16, further comprising: The communication terminal is provided with a timer for measuring a time during which no key input operation is performed in the communication terminal for a certain period of time, and when the measurement time of the timer expires, the communication network is connected to the communication network at the next key input operation. The communication terminal according to any one of claims 12 to 17, further comprising means for making a call origination request. The communication terminal according to any one of claims 12 to 18, wherein the remote lock instruction information is received in the communication terminal in an authentication phase with a communication network. Remote lock instruction information or remote lock release instruction information for the communication terminal,
In the location registration sequence between the communication terminal and the communication module, it is transmitted to the communication terminal as a UUI message at the stage after the authentication is completed and before the wireless channel is disconnected.
The communication terminal according to claim 19, wherein the communication terminal is configured to be transmitted as a UUI message to the communication terminal in a stage after the authentication is completed and before the call connection is completed in the control sequence at the time of transmission. 13. The communication terminal according to claim 12, further comprising means for detecting that the communication terminal is out of service area of the communication network and, when the communication terminal is out of service area, controlling stopping of the operation of the communication terminal by inputting a password. Item 21. The communication terminal according to any one of Items 20.   The communication terminal has a data storage unit for encrypting and storing data, and when the remote lock instruction presence / absence determining unit determines that the remote lock instruction information is included, the data in the data storage unit is decrypted The communication terminal according to any one of claims 12 to 21, wherein the communication is stopped. A remote lock method in a remote lock system comprising a communication terminal and a communication network in which the communication terminal communicates wirelessly,
By the control unit in the communication terminal,
Remote lock instruction presence / absence determining whether or not remote lock instruction information is included in a signal received from the communication network when making at least one of a transmission request and a location registration request to the communication network Judgment procedure;
When the remote lock instruction presence / absence determining means determines that the remote lock instruction information is included, at least a function management procedure for stopping an access function to user data is performed.
By the computer on the communication network side,
A procedure for recording subscriber data of the communication terminal and lock instruction information for the communication terminal in a subscriber information database;
When receiving at least one of a call origination request or a location registration request from the communication terminal, refer to the subscriber information database, and when the lock instruction information is set, generate the remote lock instruction information, And a lock information setting procedure to be transmitted to the communication terminal. A server in a communication network that performs data communication via a communication terminal,
The server includes a subscriber information database that records subscriber information of the communication terminal, and refers to the subscriber information database when receiving at least one of a transmission request and a location registration request from the communication terminal. When the communication terminal is not recorded in the subscriber information database, or when information prohibiting the use of the communication terminal is registered in the subscriber information database, a remote lock instruction signal is generated. A server for a communication network, which transmits to the communication terminal.

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