JP2661582B2 - Subsystem for preventing unauthorized use of wireless mobile terminal in wireless mobile terminal system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing unauthorized use in a wireless portable terminal via a network.

[0002]

2. Description of the Related Art In recent years, portable terminals have become widespread in the world, but security of portable terminals is still in a developing stage.

[0003] In some conventional portable terminals, in order to ensure security in the event of loss or theft, a password is set and input at the time of startup.

Japanese Patent Application Laid-Open No. Hei 5-94225 discloses that a personal computer is provided with a removable non-volatile storage device such as an IC card, and the security of the computer is maintained by preventing the computer from starting unless the card is mounted. The method is described.

Japanese Patent Application Laid-Open No. 5-145483 describes a wireless terminal having a means for displaying an owner name at the time of startup and prohibiting registration change of the owner name unless a code called a security code is input. ing.

[0006]

When a wireless portable terminal is lost or stolen, and the terminal is obtained and used illegally by a third party, if there is no password function, access to a wireless network, an address book, etc. can be freely performed. Internal data can be referred to. Even with the password function, unauthorized use cannot be prevented if the password is decrypted by any means.

An object of the present invention is to prevent a stolen or lost wireless portable terminal from being illegally used by a third party,
The goal is to improve security.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a lost or stolen wireless portable terminal is locked (unusable), thereby preventing unauthorized access to a network and reference to internal data. . Therefore, in the wireless portable terminal unauthorized use prevention method of the present invention, before the unauthorized use of the wireless portable terminal obtained by a third party, the owner notifies the portable terminal through a wireless network to that effect, The above object is achieved by setting the mobile terminal in a locked state.

[0009]

When the information center is notified of the theft, the information center is searched for a stolen terminal, and after confirming the other party, a request to delete the internal data is transmitted to the portable terminal to lock the system. . This can prevent unauthorized use of the stolen mobile terminal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 contains a wireless portable terminal unauthorized use prevention subsystem of the present invention. FIG. 2 is a block diagram of the wireless portable terminal in the present system, and FIG. 3 is a diagram showing a communication sequence between the wireless portable terminal and an information center.

First, the hardware configuration of the wireless portable terminal will be described with reference to the block diagram of FIG.

The wireless portable terminal controls the entire system C
PU21, ROM2 in which control programs and the like are stored
4. A work RAM 22 used by the control program, a data storage RAM 23 storing personal data such as an address book and a schedule, a display 25 for displaying information and operations, and an input device for inputting data 26,
It is composed of a wireless module 27 that performs wireless control.

The data input by the input device 26 is stored in the data storage RAM 23.

Since the data storage RAM 23 is generally backed up by a battery, it is not erased even when the power is turned off. When data is transmitted wirelessly, the data is transmitted from the RAMs 22 and 23 and the ROM 24 to the wireless module 27 via the system bus.

Next, the configuration of this system will be described with reference to FIG. The wireless portable terminals A (11) and B (12) are registered in the information center 14. Wired terminal C
(13) is a terminal that can access the information center 14. The wireless base station 15 and the information center 14 are connected by a wired network 16.

It is assumed that a person now owns the wireless portable terminal A (11) and has been stolen. Wireless mobile terminal A
The owner of (11) informs the information center 14 of the theft.
, The information center 14 is accessed through another person's wireless portable terminal B (12) or wired terminal C (13). The case where access is performed by the wired terminal C (13) will be described with reference to the notification sequence diagram of FIG.

From the wired terminal C (13), an ID, a telephone number,
A connection request with a password is transmitted, and the information center 1
4 receives a connection completion response (30 in the figure).
1).

After the connection to the information center 14 is completed, a theft notification to which the terminal ID of the wireless portable terminal A (11) is added is transmitted to the information center 14 (302 in the figure). After receiving the theft notification, the information center 14 returns a command confirmation response to the wired terminal C (13), and then checks through the wireless base station 15 whether or not the theft terminal is in a communicable state (waiting for reception). An ID confirmation request command with the terminal ID added is transmitted (303 in the figure). If the stolen terminal A (1
If 1) is in a communicable state, an ID notification response is returned.

In the information center 14 which has confirmed the ID notification response, the stolen terminal A (11) has been identified, and therefore a system lock request command is transmitted (304 in the figure). Upon receiving this command, the stolen terminal A (11) deletes the contents of the data storage RAM 23, and then transmits a system lock completion response to the information center 14.

The information center 14, which has confirmed the system lock of the terminal, notifies the wired terminal C (13) that the terminal has been locked by a system lock completion notification (305 in the figure). Here, since the internal data of the stolen terminal A (11) has been deleted, the security of the terminal is maintained.

[0022]

As described above, the wireless portable terminal unauthorized use prevention subsystem of the present invention transmits a command from the owner through the wireless network before the wireless portable terminal acquired by a third party is illegally used. Because the terminal is locked, the third party cannot access the wireless network or refer to internal data such as an address book after the portable terminal is lost or stolen. For this reason, the security of the terminal is maintained.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a terminal according to an embodiment of the present invention.

FIG. 3 is a sequence diagram showing an operation of the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 11 stolen terminal A 12 wireless terminal B 13 wired terminal C 14 information center 15 wireless base station 16 wired network 21 CPU 22 work RAM 23 data storage RAM 24 ROM 25 display 26 input device 27 wireless module

Claims (2)

(57) [Claims] 1. A wireless portable terminal unauthorized use prevention subsystem in a wireless portable terminal system registered and receiving a service in an information center, wherein said information center responds to a notification of the theft of the portable terminal, and Means for sending an instruction to erase internal data by means of the portable terminal, based on an erase instruction from the information center, means for erasing the internal data, and a notice to the effect that the internal data has been erased to the information center. Means for notifying, the information center further comprising means for returning the contents of the notification from the mobile terminal to the terminal that issued the theft notification, the wireless mobile terminal unauthorized use prevention subsystem. 2. The information center further comprises means for transmitting an ID confirmation request of the portable terminal, and the portable terminal further comprises means for notifying an ID to the information center in response to the ID confirmation request. The subsystem for preventing unauthorized use of a wireless portable terminal according to claim 1.