JP2003309643A - Fraud use prevention system, function limiting device, and function limit releasing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent fraudulent use of a foldable mobile phone 2. <P>SOLUTION: When a predetermined operation is performed to the foldable mobile phone 2 owned by an authorized user, an acquisition request of authorized key information is performed to a function limit releasing device 3 through a Bluetooth by the foldable mobile phone 2. Only when the authorized key information is acquired, the limit is released. Therefore, it is possible to make the authorized user use the mobile phone without requesting memorization of a secret number, and to prevent more reliably fraud by a third person in the case of loss and theft. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unauthorized use prevention system, a function restricting device and a function restricting releasing device, and is suitable for application to, for example, preventing unauthorized use of a mobile phone.

[0002]

2. Description of the Related Art In recent years, mobile phones have been equipped with various functions such as a communication function and a game function as well as a call function due to rapid technological development, and are also used in various service businesses such as electronic commerce.

Along with this, mobile phones tend to store a lot of personal information that they do not want to be disclosed to a third party. As a function of avoiding unauthorized use of the personal information by a third party, the personal identification number is operated. It is equipped with a so-called lock function that restricts or releases the use of the mobile phone when an input is made from a key.

[0004]

However, in such a mobile phone, even if it is equipped with a lock function, it is often not used because it requires the user to memorize the personal identification number, and as a result, it is lost or stolen. There is a high possibility that it will be used illegally by a third party, and it was still insufficient to prevent this.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an unauthorized use prevention system, a function limiting device, and a function limiting releasing device that can further reliably prevent unauthorized use by a third party. Is.

[0006]

In order to solve such a problem, the present invention provides an unauthorized use prevention system including a function limiting device for limiting its own function and a function limiting releasing device for releasing the limitation. The function restriction releasing device stores the normal key information unique to the function restricting device, and receives the normal key information via the short-range wireless communication means that communicates with the communication target in a predetermined distance range in response to an external request to acquire the normal key information. When the predetermined operation is performed, the function restriction device requests the function restriction release device to acquire the regular key information, and only when the normal key information transmitted from the function restriction release device is acquired. Try to remove the restrictions.

Therefore, according to the present invention, when used by a user who possesses both the function limiting device and the function limiting releasing device, the function limiting device and the function limiting releasing device mutually perform short-distance wireless communication means. Since it exists within the range that can be communicated via, the function restriction device can acquire the regular key information from the function restriction release device and release the restriction with the operation of the user. If the restriction device is lost or stolen, the function restriction releasing device and the function restriction device possessed by the user generally do not exist within a range in which they can communicate with each other via the short-range wireless communication means. As a result, even if the function restriction device is operated by a third party, the regular key information cannot be acquired from the function restriction removal device and the restriction is not released, so that unauthorized use by a third party can be prevented.

Further, according to the present invention, when the first operation required to use the function limiting device is performed, the acquisition requesting means is made to request the acquisition of the regular key information, whereby the function concerned is obtained. It can be used without requiring the user to perform a special operation for releasing the restricting device as long as the indispensable first operation is performed.

Further, in the present invention, when the regular key information is acquired, it is determined whether or not the regular user information corresponds to the regular user discrimination information corresponding to the regular key information, and the limitation is made only when a coincident determination result is obtained. By canceling
It is possible to further prevent unauthorized use of the function restriction device by a third party.

Further, according to the present invention, with respect to the function restriction device for restricting its own function, when a predetermined operation is performed, a request for acquiring the regular key information to the function restriction releasing device is communicated with a communication object within a predetermined distance range. The limitation is released only when the regular key information transmitted from the function limitation releasing device is acquired through the distance wireless communication means.

Therefore, according to the present invention, when used by a user who has both the function limiting device and the function limiting releasing device, the function limiting device and the function limiting releasing device mutually perform short-distance wireless communication means. Since it exists within the range that can be communicated via, the function restriction device can acquire the regular key information from the function restriction release device and release the restriction with the operation of the user. If the restriction device is lost or stolen, the function restriction releasing device and the function restriction device possessed by the user generally do not exist within a range in which they can communicate with each other via the short-range wireless communication means. As a result, even if the function restriction device is operated by a third party, the regular key information cannot be acquired from the function restriction removal device and the restriction is not released, so that unauthorized use by a third party can be prevented.

Further, according to the present invention, with respect to the function restriction releasing device for releasing the restriction on the function restricting device for restricting its own function, the regular key information peculiar to the function restricting device is stored to communicate with the communication target within a predetermined distance range. Using the regular key information, it is determined whether the request to obtain the regular key information made via the short-range wireless communication means is from the function limiting device,
Only when the judgment result of the function limiting device is obtained, the response to the acquisition request of the regular key information is made via the short-range wireless communication means.

Therefore, according to the present invention, when the function restriction device is lost or stolen, it is generally present outside the range in which the function restriction releasing device possessed by the user can be communicated via the short-distance wireless communication means. By doing so, even if it is operated by a third party, since the regular key information cannot be acquired and the restriction is not released, it is possible to prevent unauthorized use by the third party.
Unauthorized use by a third party can be further prevented by determining whether the request is for obtaining the regular key information from the function limiting device using the regular key information unique to the function limiting device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

(1-1) Overall Configuration of Unauthorized Use Prevention System According to First Embodiment In FIG. 1, reference numeral 1 denotes an overall unauthorized use prevention system to which the present invention is applied. Foldable mobile phone 2 that limits various functions such as functions
And a function limitation releasing device 3 for releasing the limitation.

The function restriction releasing device 3 is provided only to an authorized user who owns the folding mobile phone 2.
For example, it has the same shape and size as a business card so that it can be easily carried by a regular user, such as being worn by a regular user or stored in a pocket of clothes. There is.

Further, the function restriction releasing device 3 stores in advance the regular key information unique to the foldable mobile phone 2 for releasing the function restricted in the foldable mobile phone 2, and appropriately stores it via Bluetooth. And can be transmitted to the foldable mobile phone 2.

On the other hand, the foldable mobile phone 2 has an upper housing 2
The a and the lower housing 2b are openably and closably connected via a hinge portion 2c, and limit various functions of the foldable mobile phone 2 in the closed state.

Further, the foldable mobile phone 2 acquires the regular key information from the function restriction releasing device 3 via Bluetooth when it is opened to the closed state, and can be released based on the regular key information. Has been done.

Therefore, in the unauthorized use prevention system 1, the foldable mobile phone 2 is restricted only when the foldable mobile phone 2 is opened in the vicinity of the authorized user who possesses the function restriction releasing device 3. It was designed so that the function that was used can be released.

By the way, Bluetooth is Bluetooth SIG
This is a short-range wireless communication standard standardized by a standardization group called (Special Interest Group). 79 channels of 1 [MHz] bandwidth are set in the ISM (Industrial Scientific Medical) band of 2.4 [GHz] band, and the relevant channel is set. 160 per second
1 [Mbit / sec] (effective 721 [kbi
t / sec]).

(1-2) Circuit Configuration of Mobile Phone As shown in FIG. 2, the CPU (hereinafter, referred to as the restriction CPU) 10 of the foldable mobile phone 2 executes various programs when the power is turned on. Also, the fold detection unit 12 is controlled by reading out the function restriction program from the memory 11 in which various kinds of personal information are stored and expanding it in the internal RAM (not shown) to constantly keep the open / closed state of the foldable mobile phone 2. It is designed to monitor.

When the foldable mobile phone 2 detects that the foldable mobile phone 2 is in the closed state, the restriction side CPU 10 controls the restriction release processing unit 13 to fold the mobile phone 2.
Of the various functions in (1), only the function selected by the user in advance (hereinafter, this is referred to as selection function) can be executed (hereinafter, this is referred to as function restriction mode).

In this case, the limiting CPU 10 can limit the functions other than the selected function by not responding to the operation commands other than the operation command corresponding to the selected function.

On the other hand, when the restriction side CPU 10 detects that the folding mobile phone 2 is in the open state,
The regular key acquisition data for acquiring the regular key information stored in the function limitation releasing device 3 is generated and transmitted to the function limiting releasing device 3 via the Bluetooth module 14.

Further, when the restriction side CPU 10 receives the encryption normal key information supplied from the function restriction releasing device 3 as a response to the normal key acquisition data via the Bluetooth module 14, it controls the decryption unit 15 to apply the encryption normal key. The regular key information is restored by performing a decryption process on the key information according to a predetermined encryption method.

Then, the restriction side CPU 10 judges whether or not the restored regular key information and the regular user discrimination information corresponding to the regular key information stored in the memory 21 for authentication in advance match. , The function restriction mode is canceled by stopping the control of the function restriction processing unit 13 only when the matching judgment result is obtained.

Then, the foldable mobile phone 2 shifts to a state in which all the various functions of the foldable mobile phone 2 such as a call function and a game function can be executed (hereinafter, this is referred to as a function use mode).

In this state, the limiting CPU 10 is adapted to read a program corresponding to an operation command from an operator (not shown) from the memory 11 and execute the function according to the read program.

As described above, the restriction side CPU 10 stores the regular user identification information stored in advance and the function restriction releasing device 3.
Only when the judgment result that the regular key information obtained from the match is obtained, the functions other than the selection function of the foldable mobile phone 2 are canceled so that various functions of the foldable mobile phone 2 can be executed. Has been done.

(1-3) Circuit Configuration of Function Restriction Releasing Device As shown in FIG. 3, the CPU of the function restriction releasing device 3 (hereinafter, referred to as releasing side CPU) 20 stores the regular key management program from the memory 21. A state of waiting for an acquisition request of regular key information from an electronic device (hereinafter, referred to as BT electronic device) capable of communicating via Bluetooth by reading out and expanding the RAM in an internal RAM (not shown) It shifts to a standby mode) to control the Bluetooth module 22.

Here, when the release side CPU 20 receives the regular key acquisition data transmitted from the BT electronic device via the Bluetooth module 22, it shifts to the state of transmitting the regular key information (hereinafter referred to as the transmission mode). In addition to the Bluetooth module 22, the encryption unit 2
3 is also controlled.

Then, the releasing CPU 20 reads the regular key information from the memory 21, subjects the regular key information to an encryption process in accordance with a predetermined encryption method, and generates encrypted regular key information. The data is returned to the BT electronic device that is the transmission source of the regular key acquisition data via the Bluetooth module 22.

In this way, the release side CPU 20 operates only the Bluetooth module 22 when there is no request to acquire the regular key information from the BT electronic device, so that the power consumption of the entire function restriction release device 3 can be reduced. Has been done.

Further, when there is a request to acquire the regular key information from the BT electronic device, the release side CPU 20 has the memory 21.
By transmitting the encrypted regular key information obtained by performing the encryption process on the regular key information stored in advance,
It is designed to prevent the leakage of the regular key information.

(1-4) Unauthorized Use Prevention Processing Procedure Next, with reference to the flow chart shown in FIG. 4, the function release processing procedure of the foldable mobile phone 2 and the regular key transmission processing procedure of the function restriction release device 3 will be described. An unauthorized use prevention processing procedure of the unauthorized use prevention system 1 will be described.

That is, the limit side CP of the foldable mobile phone 2
The U10 moves from the start step RT1 to step SP1 and shifts to the function limitation mode to limit the functions other than the selected function, and proceeds to the subsequent step SP2.

At step SP2, the CPU 10 on the restriction side
Determines whether the foldable mobile phone 2 is changed from the closed state to the open state. If a negative result is obtained here, this means that the foldable mobile phone 2 is still in the closed state. At this time, the restriction side CPU 10 maintains the function restriction mode, and thereby other than the selected function. Restrict the functions of.

On the other hand, when an affirmative result is obtained, this means that the foldable portable telephone 2 is changed from the closed state to the open state, and at this time, the limiting side CPU 10 moves to the following step SP3.

At step SP3, the limiting CPU 10
Generates regular key acquisition data and transmits it to the function restriction releasing device 3, and then proceeds to step SP4.

On the other hand, the release side CPU of the function restriction release device 3
20 shifts from the start step RT2 to step SP11 to shift to the standby mode, and then shifts to step SP12 to wait for the acquisition request of the regular key information from the foldable mobile phone 2.

Here, the release side CPU 20 makes a step SP.
When the regular key acquisition data transmitted by the restriction side CPU 10 of the foldable mobile phone 2 is received in 3, the process proceeds to step SP13.

Release side CPU2 in step SP13
0 shifts to the transmission mode, and shifts to the subsequent step SP14.

Release side CPU2 in step SP14
In the case of 0, the regular key information is read from the memory 21, the predetermined regular key information is subjected to a predetermined encryption process to generate the encrypted regular key information, and the process proceeds to step SP15.

Release side CPU2 in step SP15
0 transmits the encrypted regular key information to the foldable mobile phone 2 which is the request source of the regular key information, returns to step SP11, and shifts from the transmission mode to the standby mode again.

By the way, the CP on the limit side of the foldable mobile phone 2
In step SP4, the U10 determines whether or not the release-side CPU 20 of the function restriction releasing device 3 has received the encrypted regular key information transmitted in step SP15 as a response to the regular key acquisition data transmitted in step SP3.

If a negative result is obtained here, this means that the foldable mobile phone 2 does not exist in the vicinity of the function restriction releasing device 3 possessed by the authorized user, or the foldable mobile phone 2 is in contact with the function restriction releasing device 3. In this case, the restriction side CPU 10 notifies the user of the foldable mobile phone 2 to that effect, and at the same time, step SP
Return to 1 to maintain the function limited mode.

On the other hand, when a positive result is obtained, this means that the foldable mobile phone 2 is present near the function restriction releasing device 3 owned by the authorized user and the function restriction releasing device 3 is present. Indicates that the communication has been normally performed, and at this time, the limiting side CPU 10 moves to the following step SP5.

At step SP5, the CPU 10 on the restriction side
Performs a predetermined decryption process on the encrypted regular key information received in step SP4, and
In step SP6, the regular key information corresponding to the regular key information before being encrypted is restored.

At step SP6, the limiting CPU 10
Determines whether or not the regular user identification information stored in the memory 11 and the regular key information restored in step SP5 match.

When a negative result is obtained here, this means that a user who does not have the function restriction releasing device 3 that stores the regular key information is illegally trying to use the foldable mobile phone 2. At this time, the limiting CPU 10
Returning to step SP1, the function restriction mode is maintained.

On the other hand, when a positive result is obtained, this means that the authorized user who possesses the function restriction releasing device 3 is about to use the foldable mobile phone 2, and at this time, the restricting side. The CPU 10 then proceeds to step SP7
Move on to.

In step SP7, the limiting CPU 10
Shifts from the function restriction mode to the function use mode to release the function restrictions other than the selected function, and proceeds to the subsequent step SP8.

At step SP8, the CPU 10 on the limiting side
Determines whether or not a state in which none of the various functions of the foldable mobile phone 2 are used has passed a predetermined unused time or more since the time of shifting to the function use mode.

If a positive result is obtained here, the CP on the restriction side
U10 determines that the use of the foldable mobile phone 2 by the authorized user has ended, and returns to step SP1 to shift from the function use mode to the function restriction mode again.

On the other hand, if a negative result is obtained, the limiting CPU 10 advances to the subsequent step SP9.

In step SP9, the limiting CPU 10
Determines whether or not the foldable mobile phone 2 is closed. If a negative result is obtained here, this means that the folding mobile phone 2 is still in the open state, and at this time, the limiting CPU 10 maintains the function use mode, and returns to step SP8. Determine if the unused time has elapsed.

On the other hand, when a positive result is obtained, this means that the foldable mobile phone 2 is changed from the open state to the closed state. At this time, the limiting side CPU 10 causes the foldable mobile phone 2 to be folded by the authorized user. When it is determined that the use of the tatami-mat type mobile phone 2 has ended, the process returns to step SP1 to shift from the function use mode to the function restriction mode again.

In this way, when the limiting CPU 10 detects that the open state is set in step SP2, the limiting CPU 10 returns to step S
Only when an affirmative result of receiving the encrypted regular key information is obtained in P4 and an affirmative result that coincides with the regular user identification information in the memory 11 is obtained in step SP6, the foldable mobile phone 2 by the authorized user is obtained. It is configured so that it is possible to shift to the function use mode by determining that it is the use of.

(1-5) Operations and Effects With the above configuration, the unauthorized use prevention system 1 stores the regular key information unique to the foldable mobile phone 2 owned by the authorized user in the memory 21 as a storage means. The function restriction releasing device 3 and the foldable mobile phone 2 having the restriction releasing processing unit 13 as the function releasing means are both assumed to be owned by an authorized user.

In this state, the foldable mobile phone 2
Makes a request to acquire the regular key information to the function restriction releasing device 3 via Bluetooth when an operation from the closed state to the open state is made, and the selection is performed by the restriction releasing processing unit 13 only when the regular key information is acquired. Enabled to remove the function limitation.

Therefore, in the unauthorized use prevention system 1, the foldable mobile phone 2 is operated by an authorized user who has both the foldable mobile phone 2 and the function restriction releasing device 3.
When the foldable mobile phone 2 is used, both the foldable mobile phone 2 and the function restriction releasing device 3 exist within a range in which they can communicate with each other via Bluetooth (the Bluetooth modules 14 and 22), so that If the regular mobile phone 2 is opened by a regular user, the regular mobile phone 2 obtains the regular key information from the function limitation releasing device 3 to release the limitation, so that the regular user can use it without requesting the memorization of the personal identification number. be able to.

On the other hand, in the unauthorized use prevention system 1, when the foldable mobile phone 2 is lost or stolen, the function restriction releasing device 3 and the foldable mobile phone 2 owned by the authorized user are held. Since the and are generally not present within a range in which they can communicate with each other via Bluetooth, the foldable mobile phone 2 obtains the regular key information even if a third party operates the closed mobile phone 2 from the closed status to the open status. Since the restriction cannot be released without being able to do so, it is possible to prevent unauthorized use by the third party.

In addition to this, the foldable mobile phone 2 obtains the regular key information when the foldable mobile phone 2 is operated from the closed state to the open state as the first operation required when using the foldable mobile phone 2. By making the request, it is possible to more easily use a special and complicated operation for canceling the foldable mobile phone 2, such as an operation of inputting a personal identification number, without requesting an authorized user. .

In this case, the foldable mobile phone 2 is operated until it is operated from the closed state to the open state.
Since the function of is limited, it can be suppressed with the minimum necessary power consumption.

Further, when the foldable mobile phone 2 acquires the regular key information, the foldable portable telephone 2 determines whether or not the regular user information corresponds to the regular user determination information corresponding to the regular key information. Unauthorized use by a third party can be further prevented by removing the restriction only to the third party.

According to the above-mentioned configuration, the unauthorized use prevention system 1 is a foldable mobile phone when it is used by an authorized user who has both the foldable mobile phone 2 and the function restriction releasing device 3. When the foldable mobile phone 2 is lost or stolen, the third party obtains the regular key information at the time of the opening operation and removes the restriction of functions other than the selection function. Even if the opening operation is performed, the restrictions of functions other than the selection function are not released.

As a result, in the unauthorized use prevention system 1,
Unauthorized use by a third party can be prevented without requiring the authorized user to perform a special and complicated operation for releasing the foldable mobile phone 2 to the authorized user, and thus, an unauthorized use by the third party. Can be prevented more reliably.

(2-1) Overall Configuration of Unauthorized Use Prevention System According to Second Embodiment In FIG. 5, reference numeral 30 indicates an unauthorized use prevention system to which the present invention is applied as a whole, and a credit for limiting the personal information reading function. A card 40, a function restriction canceling device 50 that cancels the restriction, and a card reader 6 that is a data reading device.
0 and.

The function restriction releasing device 50 is provided only to a regular user who owns the credit card 40. For example, the function limitation releasing device 50 has the same shape and size as a business card. Or, it can be easily carried by the authorized user, such as being stored in a pocket of clothes.

Further, the function restriction releasing device 50 prestores the regular key information unique to the credit card 40 for releasing the personal information reading function which is restricted in the credit card 40, and the credit card is appropriately sent via Bluetooth. 40 can be transmitted.

On the other hand, the credit card 40 operates so as to be held over a predetermined position of the card reader 60, and at the time of the operation, the regular key information is obtained from the function restriction releasing device 50 via Bluetooth. However, the personal information reading function can be canceled based on the regular key information.

Therefore, in the unauthorized use prevention system 30, the personal information reading function restricted by the credit card 40 is canceled only when the credit card 40 is used in the vicinity of the authorized user who possesses the function restriction canceling device 50. It is designed to get you.

(2-2) Circuit configuration of credit card In FIG. 6 in which the same parts as those in FIG. 2 are designated by the same reference numerals, the modulation / demodulation processing unit 43 of the credit card 40 performs modulation processing and electromotive force generation processing. It is done like this.

That is, the modulation / demodulation processing unit 43 generates a stable electromotive force based on the magnetic field energy of the electromagnetic wave for power supply supplied from the card reader 60 (FIG. 5), and the credit card 42 is operated based on the generated electromotive force. It is designed to work.

The modulation / demodulation processing unit 43 also generates a modulated wave by subjecting the transmission information to a modulation process using a carrier wave in a predetermined frequency band, and an modulated wave is generated by an antenna (not shown).
Can be radiated to the card reader 60 (FIG. 5) as an electromagnetic wave from which information is superimposed.

When the restriction side CPU 41 is operated by the electromotive force generated by the modulation / demodulation processing section 43, it reads the function restriction program from the memory 11 and expands it in the internal RAM (not shown), so that the function restriction canceling device 50 operates. The regular key acquisition data for acquiring the stored regular key information is generated, and this is transmitted to the function restriction releasing device 50 via the Bluetooth module 14.

Further, when the restriction side CPU 41 receives the encryption normal key information supplied from the function restriction releasing device 50 as a response to the normal key acquisition data via the Bluetooth module 14, it controls the decryption unit 15 to obtain the encryption normal key. The regular key information is restored by performing a decryption process on the key information according to a predetermined encryption method.

Then, the restriction side CPU 41 obtains a judgment result in which the restored regular key information matches the regular user discrimination information corresponding to the regular key information stored in the memory 42 for authentication in advance. Only when the function cancellation processing unit 4
By stopping the control of No. 4, the state shifts to a state in which the personal information stored in the memory 42 can be read (hereinafter, this is referred to as a function use mode).

In this state, the restriction side CPU 41 reads out from the memory 42 the payment personal information required for the payment processing in the card reader 60 out of the personal information 43 stored in the memory 42, and reads the payment personal information. It is transmitted to the card reader 60 via the modulation / demodulation processing unit 43.

As described above, the restriction side CPU 41 stores the regular user identification information stored in advance and the function restriction releasing device 5.
The personal information reading function of the credit card 40 is canceled, and the personal information in the memory 42 can be read and transmitted to the card reader 60 only when the judgment result that the regular key information acquired from 0 matches is obtained. Has been done.

(2-3) Circuit Configuration of Function Restriction Canceling Device In FIG. 7 in which parts corresponding to those in FIG. 3 are designated by the same reference numerals, the CPU of the function restriction canceling device 50 (hereinafter, referred to as cancellation side CPU) The 51 reads the regular key management program from the memory 52 and expands it in an internal RAM (not shown) to shift to the standby mode and control the Bluetooth module 22.

Here, when the release side CPU 51 receives the regular key acquisition data transmitted from the BT electronic device via the Bluetooth module 22, it shifts to the transmission mode to control not only the Bluetooth module 22 but also the encryption unit 23. To do.

Then, the releasing CPU 51 reads out the regular key information from the memory 52, performs encryption processing on the regular key information in accordance with a predetermined encryption method, and generates encrypted regular key information. The data is returned to the BT electronic device that is the transmission source of the regular key acquisition data via the Bluetooth module 22.

In this way, the release side CPU 51 can reduce the power consumption of the entire function restriction release device 50 by operating only the Bluetooth module 22 when there is no acquisition request for the regular key information from the BT electronic device. Has been done.

Further, when there is a request to acquire the regular key information from the BT electronic device, the release side CPU 51 causes the memory 52 to operate.
By transmitting the encrypted regular key information obtained by performing the encryption process on the regular key information stored in advance,
It is designed to prevent the leakage of the regular key information.

(2-4) Circuit Configuration of Card Reader As shown in FIG. 8, the CPU (hereinafter referred to as a reader CPU) 61 of the card reader is controlled by the memory 62 when the power is turned on from the external power source. Each circuit unit is controlled by reading out the program and expanding it in an internal RAM (not shown).

The modulation / demodulation processing unit 63 performs modulation processing on a carrier wave of a predetermined frequency band, and the credit card 40
The electromagnetic waves for the power source are continuously radiated from the antenna (not shown).

Further, the modulation / demodulation processing unit 63 receives the information superimposing electromagnetic wave radiated from the credit card 40 (FIG. 5) via the antenna (not shown), and with respect to the modulated wave based on the information superimposing electromagnetic wave. The demodulation process is applied to restore the personal information for payment, and this is sent to the signal processing unit 63.

The signal processing unit 63 executes a payment process with an external device via the Internet connection unit 65 based on the personal information for payment, thereby making it possible to make a financial contract with a predetermined company. ing.

(2-5) Unauthorized Use Prevention Processing Procedure Next, using the flowchart shown in FIG. 9, the function cancellation processing procedure of the credit card 40 and the function restriction cancellation device 5 will be described.
An unauthorized use prevention processing procedure of the unauthorized use prevention system 30 by the regular key transmission processing procedure of 0 and the power supply processing procedure of the card reader 60 will be described.

That is, the reader CPU of the card reader 60
In step 61, the process moves from the start step RT3 to step SP21, radiates the electromagnetic waves for power supply, and then moves to step SP22.

On the other hand, the CP on the restricted side of the credit card 40
The U41 moves from the start step RT4 to step SP31 and determines whether or not the electromagnetic wave for power supply has been received. If a negative result is obtained here, this means that the credit card 40 is not held over the card reader 60 yet, and at this time, the restriction side CPU 41 waits until it receives the electromagnetic wave for power supply.

On the other hand, when a positive result is obtained, this means that the credit card 40 is held over the card reader 60, and at this time, the limiting CPU 41.
Moves to the following step SP32.

In step SP32, the CPU 4 on the restriction side
1 is for generating the regular key acquisition data and releasing the function restriction releasing device 5
It transmits to 0 and moves to the following step SP33.

On the other hand, the release side CP of the function restriction release device 50
The U51 moves from the start step RT2 to step SP11 and shifts to the standby mode, and then moves to step SP12 to wait for the acquisition request of the regular key information from the foldable mobile phone 2.

Here, the release side CPU 51 executes the step SP
32, CPU 10 on the limiting side of credit card 40
When the regular key acquisition data transmitted by is received, the process proceeds to the next step SP13.

In step SP13, the release side CPU5
1 shifts to the transmission mode, and in the subsequent step SP14, the regular key information is read out from the memory 52, and then the predetermined regular encryption processing is performed to generate the encrypted regular key information, and then proceeds to the subsequent step SP15.

In step SP15, the release side CPU5
In No. 1, the encrypted regular key information is transmitted to the credit card 40, which is the request source of the regular key information, and the process returns to step SP11 to shift from the transmission mode to the standby mode again.

By the way, the limit side C of the credit card 40
The PU 41 proceeds to step SP33 in step SP33.
It is determined whether or not the encrypted regular key information transmitted in step SP15 is received from the function restriction releasing device 50 as a response to the regular key acquisition data transmitted in 32.

If a negative result is obtained here, this means that the credit card 40 does not exist in the vicinity of the function restriction releasing device 50 possessed by the authorized user, or the function restriction releasing device 50 is normally operated. This means that communication could not be performed. At this time, the restriction side CPU 41 moves to the subsequent step SP37 and ends the function cancellation processing.

On the other hand, if a positive result is obtained, this means that the credit card 40 is present near the function restriction releasing device 50 owned by the authorized user, and the credit card 40 normally operates with the function restriction releasing device 50. This means that communication has been performed, and at this time, the limiting CPU 41 proceeds to step SP3.
Go to 4.

In step SP34, the limiting CPU 4
1 performs step SP33 by performing a predetermined decryption process on the encrypted regular key information received in step SP33.
In 14, the regular key information corresponding to the regular key information before being encrypted by the function restriction releasing device 50 is restored, and the process proceeds to the subsequent step SP35.

In step SP35, the limiting CPU 4
1 determines whether or not the authorized user identification information stored in the memory 42 and the authorized key information restored in step SP34 match.

If a negative result is obtained here, this means that a user who does not have the function restriction releasing device 50 that stores the regular key information is illegally trying to use the credit card 40. Restricting CPU 41
Moves to the subsequent step SP37 and ends the function canceling process.

On the other hand, when a positive result is obtained, this means that the authorized user who possesses the function restriction releasing device 50 is about to use the credit card 40. At this time, the restriction side CPU 41 Continuing step S
Move to P36.

In step SP36, the limiting CPU 4
1 is to release the restriction of the personal information reading function by shifting from the function restriction mode to the function use mode, then read the payment personal information from the memory 42 and perform the modulation processing,
It is radiated to the card reader 60 (FIG. 5) as an information-superimposed electromagnetic wave, and the function release processing is ended in the subsequent step SP37.

In this case, the reader CP of the card reader 60
The U61 obtains a positive result of receiving the information-superimposed electromagnetic wave in step SP22, and proceeds to subsequent step SP23.

At step SP23, the reader CPU 6
1 restores personal information for payment by demodulating the modulated wave based on the electromagnetic wave for information superimposition, executes the payment processing based on the personal information for payment, and then returns to step SP21 for power Emits electromagnetic waves.

As described above, when the CPU 41 on the restriction side receives the electromagnetic wave for electric power in step SP31, the CPU 41 in step SP32
In step SP34, an affirmative result of receiving the encrypted regular key information is obtained, and in step SP34.
Only when an affirmative result that matches the authorized user determination information in the memory 42 is obtained in 36, it is determined that the authorized user is using the credit card 40 and the personal information for payment can be read. There is.

(2-6) Operation and Effect With the above configuration, the unauthorized use prevention system 30 releases the function restriction in which the memory 42 as a storage means stores the regular key information unique to the credit card 40 owned by the authorized user. The configuration is based on the assumption that the authorized user possesses both the device 50 and the credit card 40 having the restriction release processing unit 44 as the function releasing means.

In this state, the credit card 40
Requests the function restriction releasing device 50 to acquire the regular key information via the Bluetooth when the card reader 60 is operated, and selects the function by the restriction releasing processing unit 44 only when the regular key information is acquired. I tried to remove the restriction of.

Therefore, in the unauthorized use prevention system 30, when used by an authorized user who has both the credit card 40 and the function restriction releasing device 50, the credit card 40 and the function restriction releasing device 50 are used.
Since both of them are within a range in which they can communicate with each other via Bluetooth (Bluetooth modules 14 and 22), the credit card 40 obtains the regular key information and lifts the restriction when it is held over the card reader 60. Therefore, the authorized user can be used without requiring the memorization of the personal identification number.

On the other hand, in the unauthorized use prevention system 30, if the credit card 40 is lost or stolen, the function restriction releasing device 50 possessed by the authorized user is held.
Since the credit card 40 and the credit card 40 do not generally exist outside the range in which they can communicate with each other via Bluetooth, the credit card 40 cannot obtain the regular key information even if it is held by the card reader 60, and the restriction is not released. Therefore, the unauthorized use by the third party can be prevented.

In addition to this, the credit card 40 requests the acquisition of the regular key information when an operation of holding the card over the card reader 60 is performed as the first operation required when using the credit card 40. Due to
It is possible to use a special and complicated operation for canceling the credit card 40 without requiring the authorized user.

In this case, since the credit card 40 operates by the electromagnetic wave for power supply radiated from the card reader 60, it is not necessary to provide a power supply circuit in the credit card 40, so that the credit card 40 can be miniaturized. .

According to the above configuration, the unauthorized use prevention system 30 includes the credit card 40 and the function restriction releasing device 5.
When the credit card 40 is held by the card reader 60, the regular key information is acquired from the function limitation releasing device 50 to restrict the personal information reading function when the credit card 40 is held by the card reader 60. If the credit card 40 is lost or stolen, the card reader 6
Even if the credit card 40 is held over 0, the credit card 40 cannot acquire the regular key information from the function restriction releasing device 50 and the restriction of the personal information reading function is not released.

As a result, the unauthorized use prevention system 30 can prevent unauthorized use by a third party without requiring the special user to perform a special and complicated operation for releasing the credit card 40. Unauthorized use by the three parties can be prevented more reliably.

(3-1) Overall Structure of Unauthorized Use Prevention System According to Third Embodiment In FIG. 9, reference numeral 70 denotes an unauthorized use prevention system to which the present invention is applied as a whole, and the unlocking function of the door 80 is restricted. A door knob 81 for opening and a function restriction releasing device 90 for releasing the restriction.

The function restriction releasing device 90 is, for example, a door 90.
It is given only as a regular user to the resident of the house where is installed.For example, it has the same shape and size as a business card, so that it can be worn by a regular user or stored in a pocket of clothes. By doing so, the authorized user can easily carry it.

Further, the function restriction releasing device 90 includes the door knob 8
The regular key information unique to the function limitation releasing device 90 for releasing the unlocking function limited in 1 is stored in advance and can be appropriately transmitted to the door knob 81 via Bluetooth.

On the other hand, the door knob 81 is adapted to operate based on the current supplied through the distribution line (not shown) routed from the wiring board of the house, and the door knob 81 is turned. At this time, the regular key information is acquired from the function restriction releasing device 90 via Bluetooth, and the unlocking function can be released based on the regular key information.

Therefore, in the unauthorized use prevention system 70, the unlocking function limited by the door knob 81 can be released only when the door knob 81 is used in the vicinity of the authorized user who possesses the function limitation releasing device 90. It is done like this.

(3-2) Door Circuit Configuration In FIG. 11 in which parts corresponding to those in FIG. 2 are designated by the same reference numerals, the CPU of the door knob 81 (hereinafter, referred to as the limiting CPU
82) reads the function restriction program from the memory 83 and expands it in the internal RAM (not shown) to control the restriction release processing unit 84 so that the unlocking function cannot be executed, that is, the door knob 81 is locked. The door 80 cannot be opened / closed (hereinafter referred to as a function restriction mode).

In this state, the limiting CPU 82 controls the door state detecting section 85 to constantly monitor the rotating state of the door knob 81.

Here, the CPU 82 on the restriction side has the door knob 81.
When it is detected that the function restriction release device 90 has been turned, normal key acquisition data for acquiring the normal key information stored in the function restriction release device 90 is generated, and this is generated via the Bluetooth module 14. Send to 90.

When the restriction side CPU 82 receives the encryption normal key information supplied from the function restriction releasing device 90 as a response to the normal key acquisition data through the Bluetooth module 14, it controls the decryption unit 15 to control the encryption normal key. The regular key information is restored by performing a decryption process on the information according to a predetermined encryption method.

Further, when the restriction side CPU 82 obtains a judgment result in which the restored regular key information matches the regular user discrimination information corresponding to the regular key information stored in the memory 83 for authentication in advance, Restricted use processing unit 84
Function control mode is released by stopping the control of
A state in which the door knob 81 can be unlocked and opened / closed (hereinafter,
This is called a function use mode).

In this state, the restriction side CPU 82 controls the door state detection unit 85 to monitor the open / closed state of the door 80. When it is detected that the door 80 is opened / closed, By controlling the limit release processing section 84 again, the function use mode is shifted to the function limit mode.

As described above, the restriction side CPU 82 stores the regular user identification information stored in advance and the function restriction releasing device 9 in advance.
The unlocking function of the door knob 81 is released and the opening / closing operation of the door knob 81 can be performed only when the determination result that the regular key information acquired from 0 matches.

(3-3) Circuit Configuration of Function Restriction Canceling Device In FIG. 12 in which parts corresponding to those in FIG. 3 are designated by the same reference numerals, the CPU of the function restriction canceling device 90 (hereinafter, referred to as cancellation side CPU) 91 reads out the regular key management program from the memory 92 and expands it in an internal RAM (not shown) to shift to the standby mode and control the Bluetooth module 22.

Here, when the release side CPU 91 receives the regular key acquisition data transmitted from the BT electronic device via the Bluetooth module 22, it shifts to the transmission mode to control not only the Bluetooth module 22 but also the encryption section 23. To do.

Then, the release-side CPU 91 reads the regular key information from the memory 92, performs encryption processing on the regular key information in accordance with a predetermined encryption method, and generates encrypted regular key information, and this is generated. The data is returned to the BT electronic device that is the transmission source of the regular key acquisition data via the Bluetooth module 22.

In this way, the release-side CPU 91 can reduce the power consumption of the entire function restriction release device 90 by operating only the Bluetooth module 22 when there is no request to acquire the regular key information from the BT electronic device. Has been done.

When there is a request to acquire the regular key information from the BT electronic device, the release side CPU 91 causes the memory 92.
By transmitting the encrypted regular key information obtained by performing the encryption process on the regular key information stored in advance,
It is designed to prevent the leakage of the regular key information.

(3-4) Unauthorized Use Prevention Processing Procedure Next, using the flow chart shown in FIG. 13, the unauthorized use prevention by the function release processing procedure of the door knob 81 and the regular key transmission processing procedure of the function restriction release device 90 will be described. The unauthorized use prevention processing procedure of the system 70 will be described.

That is, the limiting CPU 82 of the door knob 81
Shifts from the start step RT5 to step SP41 to shift to the function limitation mode to limit the unlocking function, and then proceeds to step SP42.

In step SP42, the limiting CPU 8
2 determines whether the door knob 81 (FIG. 9) has been turned. If a negative result is obtained here, the limiting CPU 82
Restricts the unlocking function by maintaining the function restriction mode.

On the other hand, when an affirmative result is obtained, the limiting CPU 82 proceeds to the subsequent step SP43.

In step SP43, the limiting CPU 8
2 is for generating the regular key acquisition data and releasing the function restriction releasing device 9
It transmits to 0 and moves to the following step SP44.

On the other hand, the CP on the release side of the function restriction release device 90
The U 91 moves from the start step RT 2 to step SP 11 and shifts to the standby mode, then moves to step SP 12 and waits for the acquisition request of the regular key information from the door knob 81.

Here, the release side CPU 91 executes the step SP
When the regular key acquisition data transmitted by the restriction side CPU 91 of the door knob 81 is received at 43, the process proceeds to the subsequent step SP13.

In step SP13, the release side CPU 9
1 shifts to the transmission mode, and in the subsequent step SP14, the regular key information is read out from the memory 92, and then the predetermined regular encryption processing is performed to generate the encrypted regular key information, and then proceeds to the subsequent step SP15.

At step SP15, the release side CPU 9
In No. 1, the encrypted regular key information is transmitted to the doorknob 81, which is the request source of the regular key information, and the process returns to step SP11 to shift from the transmission mode to the standby mode again.

By the way, the limiting CPU 82 of the door knob 81
Determines in step SP44 whether or not the encrypted regular key information transmitted from the function restriction releasing device 90 as a response to the regular key acquisition data transmitted in step SP43 is received.

If a negative result is obtained here, this means that the door 80 does not exist in the vicinity of the function restriction releasing device 90 possessed by the authorized user or the function restriction releasing device 9 is present.
0 indicates that communication could not be normally performed with 0. At this time, the limiting CPU 82 returns to step SP41 and maintains the function limiting mode.

On the other hand, when a positive result is obtained, this means that the door 80 exists near the function restriction releasing device 90 owned by the authorized user, and normal communication with the function restriction releasing device 90 occurs. This means that the restriction side CPU 82 moves to the following step SP45.

In step SP45, the limiting CPU 8
2 performs step SP4 by performing a predetermined decryption process on the encrypted regular key information received in step SP44.
In step 14, the regular key information corresponding to the regular key information before being encrypted is restored, and the process proceeds to step SP46.

In step SP46, the limiting CPU 8
The item 2 determines whether or not the regular user identification information stored in the memory 83 and the regular key information restored in step SP45 match.

If a negative result is obtained here, this means that the user who does not have the function restriction releasing device 90 for storing the regular key information illegally operated the door knob 81 for rotation. The restriction side CPU 82 returns to step SP41 and maintains the function restriction mode.

On the other hand, when a positive result is obtained, this means that the authorized user who possesses the function restriction releasing device 90 has rotated the door knob 81. At this time, the restriction side CPU 82 Then, it proceeds to step SP47.

In step SP47, the limiting CPU 8
2 releases the restriction of the unlocking function by shifting from the function restriction mode to the function use mode, and the subsequent step SP4
Go to 8.

At the step SP48, the CPU 8 on the restriction side
2 determines whether the opening / closing operation of the door 80 has been performed.

If a negative result is obtained here, step S
In P47, it indicates that the opening / closing operation of the door 80 has not been performed after releasing the restriction of the unlocking function, and at this time, the restriction side CPU 82 indicates that the authorized user has not finished using the door 80. The determination is waited until it is detected that the door 80 is changed from the open state to the closed state.

On the other hand, when an affirmative result is obtained, this means that the opening / closing operation of the door 80 has been performed after releasing the restriction of the unlocking function in step SP47. At this time, the restriction side CPU 82 Judges that the authorized user has finished using the door 80, returns to step SP41, and shifts from the function use mode to the function restriction mode again.

In this way, the limiting CPU 82 obtains an affirmative result of receiving the encryption regular key information in step SP44, and obtains an affirmative result that matches the regular user discrimination information in the memory 83 in step SP46. Only, it is possible to determine that the door 80 is being used by an authorized user and remove the restriction of the unlocking function 80 on the door knob 81.

The limiting CPU 82 executes step SP4.
In step 7, if it is not possible to detect that the opening / closing operation of the door 80 has been performed even after a lapse of a predetermined time after releasing the restriction of the unlocking function in step SP47, the process proceeds to step SP48 following the lapse of the predetermined time. After that, the function use mode is switched to the function restriction mode again.

As a result, the restricting CPU 82 causes the door 80 to operate even though the authorized user once releases the restriction on the unlocking function.
Door 8 by a third party, even if not used
The use of 0 can be prevented in advance.

(3-5) Operations and Effects With the above configuration, the unauthorized use prevention system 70 has a function limitation that the regular key information peculiar to the door 80 of the house where the regular user lives is stored in the memory 92 as the storage means. It is configured on the assumption that the authorized user carries the releasing device 90.

In this state, the door knob 81 having the restriction releasing processing section 84 as the function releasing means sends a request for obtaining the regular key information to the function limiting releasing device 90 to the Bluetooth function when the door knob 81 is turned. The restriction release processing unit 84 releases the restriction on the unlocking function only when the regular key information is acquired.

Therefore, in the unauthorized use prevention system 70, when the door 80 is opened and closed by an authorized user who possesses the function restriction releasing device 90, the door knob 8
Since both 1 and the function restriction release device 90 exist within a range in which they can communicate with each other via Bluetooth (the Bluetooth modules 14 and 22), the door knob 81 can be turned by the authorized user. Since the regular key information is acquired from the function limitation releasing device 90 and the limitation is released, the regular user can unlock the key without using the physical key.

On the other hand, in the unauthorized use prevention system 70, when the door 80 is opened / closed by a third party who does not have the function restriction releasing device 90, both the door knob 81 and the function restriction releasing device 90. Are not within a range in which they can communicate with each other via Bluetooth (the Bluetooth modules 14 and 22), the doorknob 81 can acquire the regular key information from the function restriction releasing device 90 even if the doorknob 81 is turned by a third party. Unauthorized use by the third party can be prevented because the restrictions are not released without first doing so.

In this case, since the door knob 81 does not require a physical key, unauthorized use such as picking by a third party can be prevented.

In addition to this, the door 80 has a door knob 81 as an operation that is first necessary when using the door 80.
By requesting the acquisition of the regular key information when the rotation operation is performed, a special and complicated operation for releasing the unlocking function can be used without requesting the regular user.

According to the above-described configuration, the unauthorized use prevention system 70 has the unlocking function of the door knob 81, which acquires the regular key information when the door knob 81 is rotated by the regular user who possesses the function restriction releasing device 90. When the door knob 81 is rotated by a third party who does not have the function limitation releasing device 90, the door knob 81 cannot acquire the regular key information and does not release the limitation of the unlocking function. did.

As a result, the unauthorized use prevention system 70 can not only prevent unauthorized use by a third party without having an authorized user possess a physical key.
Unauthorized use such as picking by a third party can be prevented, and thus, unauthorized use by a third party can be prevented more reliably.

(4) Other Embodiments In the above-described first embodiment, the case of shifting from the function use mode to the function restriction mode when the unused time has passed was described, but the present invention is not limited to this. In addition, the foldable mobile phone 2 that exists when the unused time has elapsed
The position information of may be transmitted to a position information management server registered in advance.

In this case, when the foldable mobile phone 2 is lost or stolen, it is possible to prevent not only unauthorized use by a third party but also the unauthorized use itself.

Further, in the above-mentioned embodiment, when there is an acquisition request for the regular key information from the restriction side CPU 10, 41 or 82 as the acquisition request means, the release side CPU 20, 51 or as the acquisition request response means or Although the case has been described in which the cipher regular key information is transmitted via the Bluetooth module 22 as a response to the request by 91, the present invention is not limited to this, and the release side CPUs 20 and 5 are not limited thereto.
A response may be made after determining whether the request is an acquisition request from the folding mobile phone 2, the credit card 40, or the door 80 by 1 or 91.

In this case, when the restriction side CPU 10 of the foldable mobile phone 2 as the acquisition request means makes an acquisition request for the regular key information in step SP4 described above with reference to FIG.
The authorized user determination information (authorized user determination information) stored in the memory 11 is transmitted to the function restriction releasing device 3.

Similarly, the CP on the restricted side of the credit card 40
U41 (the CPU 82 on the restriction side of the door knob 81) is shown in FIG.
When requesting acquisition of regular key information in step SP32 (step SP43) described above with reference to FIG. 13, the regular user identification information stored in the memory 42 (memory 83) is used as the function limitation releasing device 50 (function limitation). Release device 90)
Send to.

On the other hand, the release side CPU of the function restriction release device 3
After performing step SP13 described above with reference to FIG. 4, the process step 20 performs the process of step SP6 performed by the limiting CPU 10 of the foldable mobile phone 2, and proceeds to step SP14 that follows only when a positive result is obtained. To do.

Similarly, the release side CPU 51 (release side CPU 91) of the function limit release apparatus 50 (function limit release apparatus 90)
Is the step SP13 described above with reference to FIG. 9 (FIG. 13).
After that, the processing of step SP35 (step SP46) performed by the CPU 41 on the limiting side of the credit card 40 (the CPU 82 on the limiting side of the door knob 81) is performed, and only when a positive result is obtained, the process proceeds to the subsequent step SP14. .

In this way, the function restriction releasing device 3,
It is possible to respond after determining whether the request is from the folding mobile phone 2, the credit card 40 or the door knob 81 by the release side CPU 20, 51 or 91 of 50 or 90, and the function restriction releasing device 3 , 50 or 9
0 can reliably transmit the regular key information to the foldable mobile phone 2, the credit card 40, or the doorknob 81 which should be originally transmitted.

Further, in the above-mentioned embodiments, the case where the Bluetooth modules 14 and 22 as the short-distance wireless communication means communicate with each other via Bluetooth has been described. However, the present invention is not limited to this, for example, Home R
F, wireless1394, IEEE (Institute of Electrical and
Electronics Engineers) 802.11b Wi-Hi, IEEE802.11a
In addition to communicating with a communication target within a predetermined distance range, various short-distance wireless communication means may be used for communication.

Further, in the above-mentioned embodiments, the case where the present invention is applied to the folding mobile phone 2, the credit card 40 or the door knob 81 as the function limiting device has been described, but the present invention is not limited to this, and for example, Flipper type mobile phone, PDA (Personal Digital) with communication function
Assistants), personal computers and other electronic devices, or deposit cards, certification cards and other IC (Int
egrated Circuit) card, or an openable / closable glass door, gate, safe door or other open / close door, or one intended to limit the functions of other devices other than these, can be applied as the function limiting device.

Further, in the above-described embodiment, the function restriction releasing device 3, 50 or 90 individually stores the regular key information of the foldable portable telephone 2, the credit card 40 or the door knob 81 used by the regular user. Although the case has been described, the present invention is not limited to this, and the unauthorized use of a plurality of function restricting devices may be collectively managed by unifying various function restricting devices used by an authorized user.

[0178]

As described above, according to the present invention, when used by a user who possesses both the function limiting device and the function limiting releasing device, the function limiting device only needs to be operated by the user. If the function restriction device is lost or stolen by acquiring the regular key information from the function restriction release device and the function restriction device is lost or stolen, the function restriction device is released even if operated by a third party. By preventing the restriction from being released without being able to obtain the regular key information from the device, it is possible to prevent unauthorized use by a third party, and thus more surely prevent unauthorized use by a third party.

Further, as described above, according to the present invention, the acquisition requesting means is made to request the acquisition of the regular key information when the first operation that needs to be performed when using the function limiting device is performed. Thus, it is possible to use the function limiting device without requiring the user to perform a special operation for releasing the function limiting device, as long as the indispensable first operation is performed.

Further, as described above, according to the present invention, when the regular key information is acquired, it is determined whether or not the regular user information corresponds to the regular user determination information corresponding to the regular key information, and the determination result is obtained. By canceling the restriction only in the case of the above, it is possible to further prevent the unauthorized use of the function restriction device by a third party.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of an unauthorized use prevention system according to a first embodiment.

FIG. 2 is a block diagram showing a circuit configuration of a foldable mobile phone.

FIG. 3 is a block diagram showing a circuit configuration (1) of the function restriction releasing device.

FIG. 4 is a flowchart showing an unauthorized use prevention processing procedure according to the first embodiment.

FIG. 5 is a schematic diagram showing an overall configuration of an unauthorized use prevention system according to a second embodiment.

FIG. 6 is a block diagram showing a circuit configuration of a credit card.

FIG. 7 is a block diagram showing a circuit configuration (2) of the function restriction releasing device.

FIG. 8 is a block diagram showing a circuit configuration of a card reader.

FIG. 9 is a flowchart showing an unauthorized use prevention processing procedure according to the second embodiment.

FIG. 10 is a schematic diagram showing an overall configuration of an unauthorized use prevention system according to a third embodiment.

FIG. 11 is a block diagram showing a circuit configuration of a door knob.

FIG. 12 is a block diagram showing a circuit configuration (3) of the function restriction releasing device.

FIG. 13 is a flowchart showing an unauthorized use prevention processing procedure according to the third embodiment.

[Explanation of symbols]

1, 30, 70 ... Unauthorized use prevention system, 2 ... Foldable mobile phone, 3, 50, 90 ... Function restriction releasing device,
40 ... Credit card, 80 ... Door, 81 ... Door knob, 10, 41, 82 ... Restriction side CPU, 20, 5
1, 91 ... Release side CPU, 11, 21, 42, 52,
62, 83 ... Memory, 12 ... Folding detection unit, 13, 4
4, 84 ... Restriction removal processing unit, 14, 22 ... Bluetooth module, 23 ... Encryption unit, 43 ... Modulation / demodulation processing unit, 85 ... Door state detection unit.

Continued front page    F term (reference) 5K027 AA11 BB09 HH11 HH23                 5K067 AA32 BB04 DD17 DD27 EE02                       EE12 FF01 GG01 HH23 HH24                       KK17

Claims (6)

[Claims] 1. A fraudulent use prevention system comprising a function restriction device for restricting its own function and a function restriction cancellation device for canceling the restriction, wherein the function restriction cancellation device is a regular key unique to the function restriction device. Storage means for storing information, short-distance wireless communication means for communicating with a communication target in a predetermined distance range, and the normal key information in response to an acquisition request for the normal key information from the outside via the short-distance wireless communication means. The function restriction device includes an acquisition request response means for transmitting the acquisition request for the regular key information to the short range wireless communication means and the function restriction release device through the short range wireless communication means. When a predetermined operation is performed by the requesting means and the acquisition requesting means, the acquisition requesting means is requested to acquire the regular key information and transmitted from the acquisition request responding means of the function restriction releasing device. Unauthorized use prevention system, characterized in that it comprises a function releasing means only releasing the restriction when acquiring the normal key information. 2. The function canceling means, when the first operation required to use the function limiting device is performed,
The unauthorized use prevention system according to claim 1, wherein the acquisition requesting means is caused to request acquisition of the regular key information. 3. The function releasing means, when the regular key information is acquired, determines whether or not the regular key information matches the regular user determination information corresponding to the regular key information, and if the determination result is the same. The unauthorized use prevention system according to claim 1, wherein the restriction is released only in the case. 4. The function limiting device is a foldable mobile phone, and the function releasing means causes the acquisition requesting means to send the regular key information when the foldable mobile phone is changed from a closed state to an open state. The unauthorized use prevention system according to claim 1, wherein a request for acquisition of 5. A function restricting device for restricting its own function, comprising: a near field communication means for communicating with a communication object within a predetermined distance range; Acquisition request means for requesting acquisition of key information via the short-range wireless communication means; and, when a predetermined operation is performed, causes the acquisition request means to request acquisition of the regular key information, and the function restriction releasing device. A function limiting device comprising a function releasing means for releasing the limitation only when the regular key information transmitted from the device is acquired. 6. A function restriction releasing device for releasing a restriction on a function restricting device for restricting its own function, and communicating with a storage means for storing regular key information unique to the function restricting device and a communication target within a range of a predetermined distance. Short-distance wireless communication means, and a judgment means for judging whether or not the request to acquire the regular key information made via the short-distance wireless communication means is from the function limiting device, by using the regular key information. An acquisition request response means for making a response to the acquisition request for the regular key information via the short-distance wireless communication means only when the judgment means obtains the judgment result of the function restriction device. Function restriction release device.