JPH03100895A - Malfeasant use preventing system for portable terminal equipment - Google Patents

Abstract

PURPOSE:To prevent malfeasant use from being performed when burglary occurs by starting the monitor of a time monitoring means setting the extraction time of an IC card as reference, and operating a normal operation stopping means by the detection of the time monitoring means when no IC card is loaded for prescribed time. CONSTITUTION:The above system is equipped with the time monitoring means 8 and the normal operation stopping means 1, 3b, and the start of the monitoring time of the time monitoring means 8 is set at the extraction time of the IC card 20. When no IC card 20 is loaded for the prescribed time, the normal operation stopping means 1, 3b are operated by the detection of the time monitoring means 8, and for example, the normal data processing of portable terminal equipment can be blocked by erasing an input processing program and nullifying stored data. Thereby, the malfeasant use can be prevented from being performed when the burglary occurs.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for preventing unauthorized use of a portable terminal device. The present invention relates to an unauthorized use prevention method that can invalidate the data of a stolen device and prevent it from operating normally when the device is stolen.

[Prior Art] Conventionally, terminal devices such as cash transaction devices used in banks and various financial institutions are large and usually operate online, so there is little risk of theft. Recently, such terminal devices have also become smaller as LSIs become more sophisticated and highly integrated. These seven types emphasize mobility and individuality, and are used at home or on the go.
Portable terminal devices are becoming increasingly popular for processing bank terminal operations such as cash transactions and bank transfers. In addition, offline portable terminal devices using IC cards and the like are also being used.

[Problems to be solved] As terminal devices become smaller, more portable, and more highly functional, it becomes more common for someone who is not the rightful user to take away the terminal device. The risk of misuse also increases. Moreover, when the misuse involves fraud related to the withdrawal and withdrawal of cash, transfers, etc., the damage is great and the impact on society is great.

The present invention solves the problems of the prior art, and provides a method for preventing unauthorized use of a portable terminal device that can prevent the portable terminal device from being misused even if it is stolen. The purpose is to

[Means for Solving the Problems] The configuration of the unauthorized use prevention method for a portable terminal device of the present invention to achieve the above object has a data input means and a display means, and an IC card is installed. and this IC
In mobile peripherals and terminal devices that exchange data with the card, there is a time monitoring means that detects when an IC card is not inserted by a set monitoring time and generates a detection output, and a time monitoring means that generates a detection output when the IC card is not inserted by a set monitoring time, and a time monitoring means that detects the IC card and generates a detection output. normal operation stopping means for stopping normal operation, and the time monitoring means stops the operation when the IC card is inserted, and starts measuring the monitoring time from when the IC card is removed. It is something.

Another configuration of the invention that achieves the same object is a portable terminal device that has a data input means and a display means, is equipped with an IC card, and exchanges data with the IC card. a time monitoring means that detects when a specific code is not input from the manual means and generates a detection output by a specified monitoring time; and a normal operation stop means that stops normal operation in accordance with the detection output. The time monitoring means returns the time measurement of the monitoring time to the initial state when a specific code is input, and measures the time from the initial state.

[Function] In this way, by setting the start of the monitoring time of the time monitoring means to the point at which the IC card is removed, if the IC card is not loaded for a predetermined period of time, the normal operation stopping means is activated by the detection of the time monitoring means. This prevents normal data processing of the portable terminal device by, for example, erasing the manual processing program and invalidating the stored data, so even if it is stolen, it will not be used illegally. It's done too.

Note that, instead of using the IC card, the same effect can be obtained by manually inputting a specific code from a human-powered device to cancel the time measurement of the time monitoring means and return to the initial state.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a tC card settlement processing terminal device to which the unauthorized use prevention method for a portable terminal device of the present invention is applied, and FIG. 2 is an external view thereof.

1 and 2, reference numeral 10 denotes a portable IC card payment processing terminal device (hereinafter referred to as payment processing terminal), which exchanges data with the IC card 20. In FIG.

The payment processing terminal lO has a microprocessor l inside,
A clock oscillation circuit 2, a memory 3, a display device 4, a human power device 5, an antenna 6 that receives radio waves transmitted from an external radio wave signal transmitter 21, and a level of the radio waves received through the antenna 6 is set to a fixed value. It is equipped with a radio field strength detection circuit 7 that detects when the I.
C card interface 9 is connected to IC card connector 9a. Note that 13 is a battery inserted into the payment processing terminal 10.

The microprocessor 1, memory 3, display device 4, input device 5, IC card interface 9, and alarm circuit 12 are connected to each other via a bus 11, and the radio field strength detection circuit 7 and time monitoring circuit 8 are connected to each other via a bus 11. are connected to respective interrupt terminals of microprocessor l, and send interrupt signals to microprocessor l. The memory 3 also contains an identification code 15 for recognizing the validity of the inserted IC card when the time monitoring circuit 8 resets the time measured by various programs to be described later to zero. is stored.

The aforementioned various programs include an anti-theft processing program 3a that is activated by an interrupt signal applied to the microprocessor l from each of the radio field strength detection circuit 7 and the time monitoring circuit 8, and An operation stop processing program 3b that erases a predetermined program stored in the memory 3 and invalidates predetermined data when the flag 14 is set; and an erasable area on the memory 3, such as data storage. The input data processing program 30 and the like stored in the area are stored.

Note that the anti-theft processing program 3a and the operation stop processing program 3b may be stored in the ROM of the microprocessor 1 instead of in the memory 3.

Here, when the anti-theft processing program 3a receives an interruption by a detection signal from the radio field strength detection circuit 7, it sets the theft flag 14 in a predetermined area of the memory 3 (for example, changes the flag from "0" to "1"). ”) to start the alarm circuit 15 and the operation stop processing program 3b. Further, when receiving an interrupt due to a detection signal from the time monitoring circuit 8, the processing program such as the human data processing program 30 is caused to run out of control, and the operation stop processing program 3b is activated.

When the theft flag 14 is set, the operation stop processing program 3b invalidates or erases data in a pre-specified area of the memory 3 in order to stop the operation of the payment processing terminal 10. , and erases the input data processing program 3d stored on the memory 3. This makes it impossible to process the collected data, such as input/output, and the device no longer operates normally. Furthermore, when the theft flag 14 is not set, a process is performed to write meaningless data into the manual data storage area of the attached IC card 20 and the memory 3 to prevent normal operation. To cause the processing program to run out of control and prevent it from operating normally.

Here, the time monitoring circuit 8 is controlled by the microprocessor 1. When the IC card 20 is inserted and the microprocessor 1 detects that it is an IC card with a specific code, the microprocessor 1 stops the time monitoring operation of the time monitoring circuit 8 and resets the time measurement value. to return to zero. When the microprocessor 1 detects either that the IC card with the above-mentioned specific code is not installed or that the IC card is removed, it sends a start signal to the time monitoring circuit 8. Operate to start time measurement. Note that the monitoring time of the time monitoring circuit 8 can be arbitrarily set by the microprocessor 1, and is performed by human power from the human power device 5.

Further, whether or not an IC card has a specific code can be determined by reading out the identification code given to the IC card and comparing it with the identification code 15.

The payment processing terminal 10 having the above configuration is, for example, an IC.
It can be installed as a card shopping terminal at a cash register of a supermarket, write product purchase price data to the IC card of a customer who owns an IC card, and use it as a terminal for cashless shopping. In this case, the data written to the IC card is stored and backed up in the terminal device. Then, the cash is later withdrawn from the customer's bank account. Therefore, in such a system, for example, once every two hours, a responsible person such as a cashier
Go around each cash register with the C card, insert it into the terminal device, and transfer various data including the above data in the terminal device to the IC card.
The process of recording on the card is performed.

In such a system, it is assumed here that the set time of the time monitoring circuit 8 is set to 2.5 hours. In the payment processing terminal 10, for example, if an IC card with a specific code recorded thereon is not inserted by the person in charge after 2.5 hours, an interrupt signal is sent from the time monitoring circuit 8 to the microprocessor 1 to prevent theft. The processing program 3a is started, and then the operation stop processing program 3
b is activated. As a result, the processing program of the payment processing terminal 10 may run out of control, or the memory 3 or the installed IC may
A process is performed in which meaningless data is written to the card.

Then, the time monitoring is stopped only when a specific IC card indicating the person in charge is inserted, and the monitoring time returns to zero. In this case, a specific IC indicating the person in charge
Time monitoring is canceled only when the card is inserted, so time monitoring can be stopped at night by following the prescribed procedures.
However, it is a good idea to store the terminal device in a safe or the like.

If this payment processing terminal 10 is stolen and taken outside the supermarket, there is a risk that the purchase price data backed up in the terminal device will be analyzed and the balance data in the IC card will be tampered with. be. Therefore,
To prevent this, in the supermarket, a signal transmitter 21 emits specific radio waves, which are transmitted to the payment processing terminal 1.
The system is such that 0 is always received by the antenna 6 in the terminal device. When the payment processing terminal 10 is stolen and taken out of the supermarket, the radio field strength detection circuit 7 of the payment processing terminal 10 detects that the received radio field strength has fallen below a certain level. As a result of the interrupt processing caused by this detection signal, the microprocessor 1 starts the anti-theft processing program 3a, further starts the operation stop processing program 3b, sets the theft flag 14, sounds an alarm, and saves the backed up internal data. The input data processing program 3d is deleted. By doing this, the internal data will not be read and misused. Further, since a part of the processing program of the terminal device has been deleted, the terminal device does not operate normally.

Such payment processing terminal 10 can also be used as an IC card attendance and leaving management terminal device. Therefore, an example will be explained. In this case, the interrupt caused by the detection signal from the time monitoring circuit 8 is handled as the same as the interrupt from the radio field intensity detection circuit 7. Furthermore, instead of the time monitoring circuit 8 canceling time measurement by detecting whether or not a specific IC card is attached, the time measurement is canceled by inputting a specific code from the input device 5. do.

The IC card attendance and attendance management terminal device records data such as attendance and leaving times on the IC card by inserting an IC card into the IC card at the time of attendance and leaving work. Some IC cards are collected every month, and working hours are calculated by reading the arrival and departure times. Further, as described above, the same data as the attendance data recorded on the IC card is recorded in the IC card attendance management terminal device as a backup. If this terminal device is stolen, the IC
There is a risk that the attendance data on the card may be tampered with. To prevent this, in this terminal device, the administrator has to
Enter the personal identification code from the input device 5. The attendance management terminal device determines whether or not the internally input password code is a code for canceling the monitoring time of the time monitoring circuit 8 by comparing it with an internally stored code (corresponding to identification code 15). When these match, the time monitoring circuit 8 is controlled to reset the measured time. It is assumed here that the set time of the time monitoring circuit 8 is set to 4 hours.

This terminal device monitors the time for 4 hours, and if the correct password code is not entered after 4 hours, it determines that the terminal device has been stolen, and starts the anti-theft processing program 3a by the interrupt processing of the time monitoring circuit 8. do. Then, the operation stop processing program 3b is activated and an alarm is sounded. This shows that the thief is in possession of the terminal device.

Only when the correct password is entered can the time monitoring of the terminal device be returned to its initial state. Note that, although the same applies to the above example, time monitoring is either stopped at night or set to a long time. This can be configured with specific code. Therefore, the terminal device can be stored in a safe.

As described above, in the embodiment, the time monitoring is returned to the initial state only for IC cards having a specific code, but this does not necessarily depend on the specific IC card.

Further, as the means for stopping normal operation, in addition to those mentioned in the embodiment, for example, processing such as invalidating key information input manually from the terminal device may be performed.

[Effects of the Invention] As explained above, in this invention, by setting the start of the monitoring time of the time monitoring means to the time when the IC card is removed, when the IC card is not loaded for a predetermined period of time, The detection by the time monitoring means activates the normal operation stopping means, which prevents the portable terminal from normal data processing by, for example, erasing the input processing program and invalidating the stored data. , even if it is stolen, there is no need for unauthorized use.

Note that, instead of using the IC card, the same effect can be obtained by manually inputting a specific code from a human-powered device to cancel the time measurement of the time monitoring means and return to the initial state.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an IC card payment processing terminal device to which the method for preventing unauthorized use of a portable terminal device of the present invention is applied, and FIG. 2 is an external view thereof. DESCRIPTION OF SYMBOLS 1... Microprocessor, 2... Clock oscillation circuit, 3... Memory, 4... Display device, 5... Input device, 6... Antenna, 7... Radio field intensity detection circuit,
8... Time monitoring circuit, 9... IC card interface, 10... Settlement processing terminal (IC card settlement processing terminal device), 20... IC card. Figure 2

Claims (3)

[Claims] (1) In a portable terminal device that has a data input means and a data display means, is equipped with an IC card, and exchanges data with the IC card, the
The time monitoring means detects when the IC card is not inserted and generates a detection output, and the normal operation stopping means stops normal operation according to the detection output, and the time monitoring means detects when the IC card is not inserted and generates a detection output. A method for preventing unauthorized use of a portable terminal device, characterized in that the operation of the portable terminal device is stopped when the IC card is attached, and time measurement for the monitoring time is started from the time the IC card is removed. (2) It has a detection circuit that receives radio waves transmitted from an external device via an antenna and detects the strength of the radio waves, and when the strength falls below a certain level, the normal operation stop means is activated. 2. A method for preventing unauthorized use of a portable terminal device according to claim 1. (3) In a portable terminal device having a data input means and a display means, into which an IC card is attached and which exchanges data with the IC card, the specified code is input by the set monitoring time. The time monitoring means detects when no input is received from the means and generates a detection output, and the normal operation stopping means stops normal operation in response to the detection output, and the time monitoring means detects the specific code. 1. A method for preventing unauthorized use of a portable terminal device, characterized in that when input, the time measurement of the monitoring time is returned to an initial state, and the time is measured from the initial state.