JP2750746B2 - Method for preventing unauthorized use of portable terminal devices - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing unauthorized use of a portable terminal device, and more particularly, to a portable terminal device that transmits and receives data using radio waves. The present invention relates to a system for preventing unauthorized use, in which the key input operation of a stolen device is stopped when the device is stolen and the device cannot be used.

[Prior art] Conventionally, large-sized terminal devices such as cash transaction devices used in banks and various financial institutions are used, and usually operate online, so there is almost no danger of theft. In recent years, such terminal devices have also been miniaturized as the functions and integration of LSIs have increased. Apart from this, mobility and individuality are emphasized, used at home and on the road,
2. Description of the Related Art Portable terminal devices that perform processing such as cash transactions and bank terminal operations such as bank transfers have become widespread. In addition, online portable terminal devices using IC cards and the like are also being used.

[Problem to be Solved] As described above, when a terminal device becomes smaller and has excellent portability and high functionality, another person who is not a legitimate user removes the terminal device, and the The risk of abuse also increases. In addition, when the abuse is fraudulent concerning the transfer or transfer of cash or the like, the damage is large, and the impact on society is large.

The present invention solves such a problem of the prior art, and when a portable terminal device is stolen, stops the key input operation so that the portable terminal device can be prevented from being misused. An object of the present invention is to provide a system for preventing unauthorized use of a device.

[Means for Solving the Problems] In order to achieve the above object, the portable terminal device of the present invention has a configuration for preventing unauthorized use of a portable terminal device by transmitting radio waves transmitted from an external device such as a host computer via an antenna. A receiving circuit for receiving and extracting transmission data, a theft state determining means for receiving the transmission data extracted by the receiving circuit and determining whether or not the vehicle is in the stolen state; Activate the key input invalidating means to invalidate the key input of the data input means when it is released, and activate the key input invalidating means when the IC card is not removed or inserted in the set predetermined time Activating means for invalidating key input.

[Operation] As described above, when a theft signal (specific information) is received from the outside, the theft state determination means provided inside operates to invalidate the key input, thereby enabling the key of the portable terminal device to operate. Since input cannot be performed, data processing cannot be performed, and even if the device is stolen, the portable terminal device does not need to be used illegally.

Furthermore, by monitoring the removal and insertion of the IC card within a predetermined time range, even if the theft processing by radio wave reception indicating the theft state cannot be performed, unauthorized use of the stolen portable terminal device can be prevented. It can be reliably prevented.

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

FIG. 1 is a block diagram of a delivery processing portable wireless terminal device in a shipping company or the like to which a method for preventing unauthorized use of a portable terminal device of the present invention is applied, and FIG. 2 is an external view thereof.

In FIGS. 1 and 2, reference numeral 10 denotes a delivery processing portable wireless terminal (hereinafter referred to as a delivery processing terminal), which wirelessly transmits and receives data to and from the host computer 20.

The delivery processing terminal 10 includes the microprocessor 1 therein,
A clock oscillation circuit 2, a memory 3, a display device 4, an input device 5, an antenna 6 for receiving signals by radio waves from the host computer 20, a reception circuit 7 for receiving transmission signals via the antenna 6 and extracting transmission data, The host computer 20 includes a transmission circuit 8 for transmitting data by radio waves via the antenna 6, an IC card interface 9, an alarm circuit (buzzer) 12 driven by the microprocessor 1, and the like. Connected to card connector 9a. 13 is a delivery processing terminal
The battery inserted in 10, and 21 is an IC card.

Here, the microprocessor 1, the memory 3, the display device 4, the input device 5, the receiving circuit 7, the transmitting circuit 8, the IC card interface 9, and the alarm circuit 12 are connected to each other via a bus 11, The memory 3 stores various programs to be described later and an identification number 15 of the device assigned to the delivery processing terminal 10 as being unique to the device.

The various programs described above include a stolen state determination processing program that receives transmission data from the host computer 20 extracted by the reception circuit 7 and determines whether or not the stolen state exists.
3a and accepts all key inputs from the input device 5 when the key input invalid flag 14 is set in a predetermined area of the memory 3 (for example, when the flag is set from "0" to "1"). Key input invalidation processing program 3
b, an erasable area on the memory 3, for example, an input data processing program 3c stored in a data storage area, and a communication control program 3d for transmitting and receiving data to and from the host computer 20 are stored. I have.

Here, each time a predetermined message is received from the host computer 20, the theft state determination processing program 3a
For example, when the microprocessor 1 is activated by the reception start code at the beginning of the transmission signal and obtains a predetermined code from the information included in the message, it is determined that the electronic device is stolen, and the identification number at the predetermined position in the message Is compared with the identification number 15 of the memory 3, and when they match, the invalid flag 14 is set in a predetermined area of the memory 3 to drive the alarm circuit 15 and activate the key input invalidation processing program 3b. I do.

The key input invalidation processing program 3b refers to the invalidation flag 14 and, when the invalidation flag 14 is set, generates a key input interruption so that the microprocessor 1 does not respond to the input key and processes the key. At the same time as invalidating, the data in the area of the memory 3 specified in advance is invalidated or erased, and the input data processing program 3d stored in the memory 3 is erased. Processing on the data collected by this, for example,
Input / output cannot be performed, and the device does not operate normally.

The other programs except the input data processing program 3c are not the memory 3 but the microprocessor 1
May be stored in a ROM built in the PC. Further, the host computer 20 is provided with a receiving circuit, a transmitting circuit, and a communication control program for controlling these circuits.

Now, it is assumed that the delivery processing terminal 10 is used by, for example, a driver of a delivery vehicle of a certain transportation company. When the driver receives a delivery request from a customer, the driver sends the request to the center using the delivery processing terminal 10. In the center, the data is received by the host computer 20 to plan an efficient operation of the delivery vehicles, and the operation plan is communicated to each delivery vehicle through the delivery processing terminal 10. The delivery processing terminal 10 displays the contents via the display device 4 to inform the driver of the contents. The driver determines the next destination accordingly. Although a portable terminal device is not used, the movement and allocation of vehicles by wireless use in a certain area are the same as those practically used in taxis and the like.

In the above configuration, when the receiving circuit 7 receives data from the host computer 20, the theft state determination processing program 3a is started. Microprocessor 1
Receives the received data from the receiving circuit 7 and uses the reception start code at the beginning of the transmission signal to determine the theft state determination program.
Start 3a. The theft state determination program 3a, for example,
The first data (for example, 2 bytes) after that determines whether or not it is a stolen code. If it is not determined that the code is stolen, the two-byte code is decoded as a predetermined instruction by the microprocessor 1 and performs predetermined processing on the subsequent data.

This delivery processing terminal 10 used in such a state
If they were stolen, their abuse could disrupt delivery. In this case, the driver informs the person managing the host computer 20 of the theft by telephone or the like (including the identification number of the terminal device if known, including the identification number). Then, a predetermined process is performed, and the host computer 20 directs the theft code indicating the theft and the identification number 15 of the stolen delivery processing terminal to each delivery processing terminal used in a predetermined data format. Send on radio waves.

Stolen delivery processing terminal 10, including other delivery processing terminals
When the device receives this theft signal, the device starts the theft status determination processing program 3a, which determines that the device is a theft code (or decodes the theft code). At this time, the theft state determination processing program 3a processes the next transmitted data as an identification number,
It is determined whether or not it is its own identification number by comparing it with the identification number 15 stored in the memory 3. If the result of this determination is that the identification number 15 of the self matches the identification number 15, the stolen delivery processing terminal
10 is an invalid flag that invalidates key input in the memory 3.
Raises 14 and activates the alarm circuit 12. Then, the data in the predetermined area of the memory 3 in which the processing data is stored is erased, and the input data processing program 3c written in the memory 3 is erased so that the stored data cannot be taken out (data Invalidation can be performed by processing other than writing meaningless data or erasing the program). When this flag is set, the key input invalidation processing program 3b is started, and even if a key input interrupt is received, the microprocessor 1
Does not work.

In this way, even if the delivery processing terminal 10 is stolen, it can be prevented from operating, and confusion in delivery and the like can be prevented, and unauthorized use can be prevented.

Note that such a delivery processing terminal 10 is provided with a time monitoring circuit therein, and when data is received from the host computer 20 when a specific key is not input from the input device 5 for a certain period of time after the power is turned on. The stolen state determination processing program 3a may be activated only when the

Further, a radio field intensity detection circuit may be provided in the reception circuit 7 and the key input invalidation processing program 3b may be started when the radio wave intensity detection circuit falls below a certain level.

In the embodiment, since the connector for mounting the IC card is provided, the time monitoring at the time of mounting the IC card is set to, for example, 24 hours based on the unit time of the data aggregation management process, and the like. During this time, the key input invalidation processing program 3b is activated when the inserted IC card is not removed at all, or conversely, when it is never inserted. Thus, in a situation where the theft processing cannot be performed by radio wave reception, the key input is invalidated by monitoring the removal and insertion of the IC card as a backup within a predetermined time range. As a result, unauthorized use of the stolen portable terminal device can be reliably prevented.

In the embodiment, data and programs are erased in order to stop the operation of the terminal device. However, a process of writing meaningless data to the attached IC card 20 or the storage area of the input data of the memory 3 is performed. The normal operation may not be performed, or the processing program may be run away so that the normal operation is not performed.

[Effects of the Invention] As described above, according to the present invention, when a theft signal is received from the outside, the theft state determination means provided inside operates to invalidate the key input. Since key input of the portable terminal device cannot be performed, data processing cannot be performed, and even if the portable terminal device is stolen, the portable terminal device does not need to be used illegally. Furthermore, removal of IC card,
By monitoring the insertion within a predetermined time range, it is possible to reliably prevent unauthorized use of the stolen portable terminal device even in a situation where it is impossible to perform the theft processing by radio wave reception indicating the theft state.

[Brief description of the drawings]

FIG. 1 is a block diagram of a delivery processing portable wireless terminal device used in a transportation company or the like to which a method for preventing unauthorized use of a portable terminal device of the present invention is applied, and FIG. 2 is an external view thereof. 1... Microprocessor, 2... Clock oscillation circuit,
3 ... Memory, 4 ... Display device, 5 ... Input device, 6 ...
... antenna, 7 ... receiving circuit, 8 ... transmitting circuit, 9 ...
IC card interface, 10: delivery processing terminal (delivery processing portable wireless terminal device), 20: host computer, 21
…… IC card.

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification symbol FI G08B 21/00 G06F 15/30 C 23/00 530 330 15/74 340A (72) Inventor Toru Shinagawa 1-chome Ushitora, Ibaraki-shi, Osaka 1-88 Inside Hitachi Maxell Co., Ltd. (72) Inventor Yuji Kodera 1-188 Ushitora, Ibaraki-shi, Osaka 1-88 Inside Hitachi Maxell Co., Ltd. (72) Kotaro Yamashita 1099 Ozenji, Aso-ku, Kawasaki-shi, Kanagawa Prefecture Hitachi Systems Development Laboratory (72) Inventor Akihiro Kawaoka 1099 Ozenji Temple, Aso-ku, Kawasaki City, Kanagawa Prefecture Hitachi Systems Development Laboratory Co., Ltd. (72) Inventor Kazuhiko Omichi 1-1-88 Ushitora, Ibaraki-shi, Osaka Hitachi Maxell, Ltd. (72) Inventor Toru Kojima 1-88 Ushitora, Ibaraki-shi, Osaka Hitachi Maxell (56) References JP-A-2-226920 (JP, A) JP-A-61-26337 (JP, A) JP-A-62-11993 (JP, A) JP-A-61-252728 (JP, A A) JP-A-58-85225 (JP, A) JP-A-60-72327 (JP, A)

Claims (6)

(57) [Claims] 1. A data input means and a display means are detachable.
In a portable terminal device having an IC card, a receiving circuit that receives a radio wave transmitted from an external device such as a host computer via an antenna to extract transmission data, and receives a transmission data extracted by the reception circuit. A stolen state determining means for determining whether or not a stolen state is detected, and a key input invalidating means for invalidating a key input of the data input means when the stolen state determining means determines that the stolen state is obtained. Starting means for activating the key input invalidating means to invalidate the key input when the IC card is not removed or inserted in a predetermined time period. For preventing unauthorized use of terminal equipment. 2. The portable terminal device according to claim 1, wherein the key input invalidating means invalidates key input of the data input means and invalidates predetermined data stored in the memory. Use prevention method. 3. The portable terminal device according to claim 2, wherein the key input invalidating means further erases a predetermined program stored in the memory and stops normal operation of the device. method. 4. A data input means and a display means are detachable.
A portable terminal device having an IC card has a detection circuit for detecting that the intensity of a received radio wave has fallen below a certain level, and receives a radio wave transmitted from an external device such as a host computer via an antenna. A receiving circuit for extracting the transmitted data by the receiving circuit; a stolen state determining means for receiving the transmitted data extracted by the receiving circuit to determine whether or not the stolen state; and a stolen state determined by the stolen state determining means. Key input invalidation means for invalidating key input of the data input means when the detection circuit detects that the intensity of radio waves received by the detection circuit has fallen below a certain level, and for a predetermined period of time. And a starting unit for starting the key input invalidating unit to invalidate the key input when the IC card is not removed or inserted. A method for preventing unauthorized use of a portable terminal device. 5. The portable terminal device according to claim 4, wherein the key input invalidating means invalidates key input of the data inputting means and invalidates predetermined data stored in the memory. Use prevention method. 6. The portable terminal device according to claim 5, wherein the key input invalidating means further erases a predetermined program stored in the memory and stops normal operation of the device. method.