JP2895038B1 - Mobile communication terminal and method for restricting unauthorized use thereof - Google Patents

Abstract

An object of the present invention is to prevent unauthorized use of a mobile communication terminal such as a PHS or a mobile phone when the terminal is lost while the power is turned on, without deteriorating the operability of an authorized user. A dial number regulation check processing unit (12) includes:
The destination dial number is extracted from the information input from the key operation unit 10 and it is checked whether the dial number is registered in the dial number list 13. If registered, call connection processing unit 1
A transmission process is performed via the communication device 6. If you have not registered, you will be required to enter your PIN. If the PIN is entered within the specified time,
The collation with the registered password is performed via the collation check unit 14. If the collation result is normal, the dialed number is additionally registered in the dial number list 13 and a calling process is performed. If the collation result is abnormal or the input of the personal identification number has timed out, the transmission processing is interrupted. It is considered rare that the unauthorized user and the authorized subscriber dial the same number, and the unauthorized use is prevented without deteriorating the operability of the authorized user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal and a method for restricting unauthorized use thereof, and more particularly to a mobile base station for use in a mobile communication system, in which a personal identification number for identifying a user is inputted to a radio base station. TECHNICAL FIELD The present invention relates to a mobile communication terminal capable of performing communication via the Internet and a method for restricting unauthorized use thereof.

[0002]

2. Description of the Related Art This kind of conventional technology will be described with reference to FIG. 3 showing a configuration of a mobile communication terminal. At the time of manufacture and shipment of the mobile communication terminal, a password, a guard flag (ON state signal) as a self-defense signal, and subscriber-specific information are stored in the memory unit 38. After the power is turned on by the user, the guard function unit 39 constantly monitors the digital signal status of the guard flag in the memory unit 38, and the user notifies the password notified from the data management center after the start of the operation process of the password input mode. input. Only when the input personal identification number matches the personal identification number stored in the memory unit 38, the guard flag is set to the OFF state. A call restriction release signal. CP
After receiving the signal, the U37 cancels the incoming / outgoing call barring mode and makes the mobile communication terminal usable (Japanese Unexamined Patent Publication No. 9-18 / 1997)
No. 955).

[0003]

In the above-mentioned conventional mobile communication terminal, after inputting the password at the time of power-on, there is no improper use restriction by the password regarding the outgoing call. That is, since no consideration is given to checking for unauthorized use at the time of calling, the mobile communication terminal with the power turned on may be used illegally regardless of the user.

[0004] It is an object of the present invention to provide a mobile communication terminal in which a self-defense means already set at the time of manufacture and shipment is released by inputting a password for identifying the user so that the terminal can be used. The number dialed for the first time is checked for unauthorized use by entering a password, and only when the verification result is normal, outgoing calls can be made. This prevents unauthorized use without deteriorating the operability of authorized users. It is an object of the present invention to provide a mobile communication terminal and a method for restricting unauthorized use thereof.

[0005]

The mobile communication terminal of the present invention is used as a mobile station of a mobile communication system, and communicates via a radio base station by inputting a password for identifying a user. An input / output means for inputting and outputting information including a dial number and a password; and a password for collating a password registered in advance with a password input from the input / output means. Number dialing means; dial number registering means for registering a dial number transmitted in the past; when a dial number is input from the input / output means, the dial number is referred to the dial number registering means and a new dial number is inputted. Number, and if it is a new dial number, a request for input of a password is made via the input / output means. The password is collated with the pre-registered password through the verification means. If the password does not match, the call is prohibited as unauthorized use, and if these passwords match and the entered dial number is the dial number. A dial number regulation check unit for permitting outgoing call when registered in the registration unit;

In the above configuration, if the dial number regulation checking means finds that the new dial number is authorized for use as a result of collation of the password with the new dial number, the new dial number is registered in the dial number registering means. If the password is not input after a predetermined time elapses after a request for inputting a password for the new dial number, the dial number regulation checking means may prohibit calling as unauthorized use. it can.

[0007] The unauthorized use control method of the present invention is used as a mobile station of a mobile communication system, and is used for mobile communication that enables communication via a radio base station by inputting a password for identifying a user. In the method of restricting unauthorized use of a terminal, a request for password input is required only when the dialed number of the call destination is the first number for the terminal itself, and the previously registered password of the input password is If the collation result is invalid, there is a step of restricting transmission.

In the above process, if the collation result of the personal identification number is normal, the inputted dial number is stored in the database, and the next time the same number is dialed, it is stored in the database. There may be provided a step of determining that the call is not a new dial number and enabling transmission without making a password input request.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the outline of the present invention will be described.

According to the present invention, the input of the personal identification number is requested in the case of the number dialed for the first time at the time of calling (new dial number). More specifically, the user refers to a dial number list (for example, a destination number list) in which numbers dialed in the past are registered, checks whether the dial number is a new dial number, and requests a password only when the dial number is a new dial number. And the number is registered in the dial number list. Since it is extremely unlikely that an unauthorized user and the authorized user dial the same number, it is possible to prevent unauthorized transmission from anyone other than the authorized user. In addition, by limiting the input of the personal identification number to the new dial number, the trouble of inputting the personal identification number by the authorized user can be reduced.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, a mobile communication terminal 1 of the present embodiment includes a key operation unit 10, an input reception unit 11, a dial number regulation check processing unit 12, a dial number list 13, a collation check unit 14, a timer control unit. Fifteen
, A call connection processing unit 16, a wireless unit 17, and a display unit 18. In addition, although not shown, there are provided information input means and output means for inputting and outputting communication information similar to those used for a normal mobile communication terminal, but these are not directly related to the present invention, In addition, the description is omitted because it can be easily realized by a known technique.

The input receiving unit 11 of the mobile communication terminal 1 receives a signal corresponding to a key operation of the key operation unit 10 by a user, and receives a dialed destination number.
The dial number regulation check processing unit 12 performs a number search from the dial number list 13 storing numbers dialed in the past to check whether the dialed number is a new dial number, and finds a new number. If it is determined that the password is input, the input receiving unit 11 and the display unit 18 request the user to input a personal identification number. The collation check unit 14 collates the preset password with the entered password, and if the collation result is normal, registers the dial number in the dial number list 13. When the password is normal, the call connection processing unit 16 performs a calling process through the wireless unit 17 according to the dial number. When a call arrives at the destination terminal 2 through a wireless base station and a network (not shown), the mobile communication terminal 1 can communicate through the wireless unit 17.

A predetermined time is provided for inputting a password, and when a time-out is notified from the timer control unit 15, the dial number restriction check processing unit 12 notifies the input receiving unit 11. In this case, the transmission is stopped and the display unit 18 displays the fact to the user.

If the number is already registered in the dial number list 13, the call connection processing section 16 performs a calling process without requesting a password input.

Next, the operation of the embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG. 2 showing an operation flow.

The dial number (for example, 131-12) of the destination called by the key operation of the key operation unit 10
3-4567) is supplied from the input receiving unit 11 to the dial number regulation check processing unit 12 (step A in FIG. 2).
1).

The dial number regulation check processing unit 12
In order to determine whether the supplied dial number is a newly dialed number or an already dialed number, the dial number list 13 which is a database is accessed and a registration number is searched (step A2).

[0019] If search failed (if not registered)
Is determined to be a newly dialed number, and the dial number regulation check processing unit 12 requests the input receiving unit 11 to input a password (step A3).

If a password (eg, 1234) is input within a specified time (eg, 10 seconds), the password is supplied from the input receiving unit 11 to the dial number regulation check processing unit 12 (step A4). ).

Subsequently, the personal identification number is also supplied to the collation check part 14, where it is checked whether it is the same as the already registered personal identification number (step A5).

The collation result of the personal identification number is notified to the dial number regulation check processing part 12, and when it is normal (when the personal identification number registered beforehand is 1234).
Is the dial number (131-
123-4567) is registered (step A6), and thereafter, the call is processed by the call connection processing unit 16 to receive the call (step A7).

If the processing in step A5 is abnormal (if the pre-registered password is not 1234), the dial number restriction check processing unit 12 notifies the input receiving unit 11 of the termination of the transmission (step A).
9).

When the input of the personal identification number exceeds the specified time (in the case of exceeding 10 seconds) in the processing of step A4, the timer control unit 15 notifies the dial number restriction check processing unit 12 of the time over, and dials. The number restriction check processing unit 12 notifies the input reception unit 11 of the stop of the transmission (step A9).

If the number dialed this time has already been registered in the dial number list 13 in the process of step A2, the call connection processing unit 16 does not make a request for inputting a password, and the call connection processing unit 16 makes a call. To receive the call (step A8).

[0026]

As described above, according to the present invention, when a user dials a number for the first time, a call cannot be made without inputting a personal identification number. Can be prevented. As a result, security can be improved.

Since it is rare that an authorized user and an unauthorized user dial the same number, it is considered that the restriction is limited to a new dial number. Annoyance can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the present invention.

FIG. 3 is a configuration diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile communication terminal 10 Key operation part 11 Input reception part 12 Dial number regulation check processing part 13 Dial number list 14 Matching check part 15 Timer control part 16 Call connection processing part 17 Radio part 18 Display part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H04B 7/24-7/26 H04M 1/00 H04M 1/24 H04M 1/58-1/62 H04M 1 / 66-1/78 H04Q 7/00-7/38

Claims (5)

(57) [Claims] 1. A mobile communication terminal which is used as a mobile station of a mobile communication system and enables communication via a radio base station by inputting a personal identification number for identifying a user. Input / output means for inputting and outputting information including a number, password collation means for collating a pre-registered password with a password input from the input / output means, and registering a dial number transmitted in the past When a dial number is input from the input / output means, the dial number registration means refers to the dial number registration means and checks whether the input dial number is a new dial number. Means for inputting a password through the means, and when the password is input, the password registered in advance is transmitted via the password collating means. If the password does not match, the call is prohibited as illegal use, and if these passwords match, and if the entered dial number has been registered in the dial number registration means, it is authenticated. A mobile communication terminal, comprising: dial number restriction checking means for permitting a call to be used. 2. The dial number restriction checking means,
As a result of collation of the password for the new dial number,
2. The mobile communication terminal according to claim 1, wherein, when the use is authorized, the new dial number is registered in the dial number registration means. 3. The dial number restriction checking means,
After requesting input of a password for the new dial number,
2. The system according to claim 1, wherein if a password is not input even after a predetermined time, calling is prohibited as unauthorized use.
The mobile communication terminal according to the above. 4. A method for restricting unauthorized use of a mobile communication terminal which is used as a mobile station of a mobile communication system and enables communication via a wireless base station by inputting a password for identifying a user. , Only when the dialed number of the other party is the first number for your terminal, you are required to enter a PIN, and if the result of collating the entered PIN with a pre-registered PIN is incorrect. An unauthorized use control method characterized by restricting outgoing calls. 5. If the collation result of the password is normal, the entered dial number is stored in a database,
5. The illegal operation according to claim 4, wherein the next time the same number is dialed, it is determined that the number is not a new dial number because the number is stored in the database, and a call can be made without requesting a password input. Usage regulation method.