JP2008117085A - Portable electronic equipment and security control program for portable electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide portable electronic equipment and its security control program for simplifying a system for preventing the risk of information leakage due to loss or theft based on whether communication can be established with another communication equipment using a short-range communication means. <P>SOLUTION: This portable telephone set 101 for repeatedly communicating with an accessory (not shown) equipped with a Bluetooth communication function as a slave is provided with an accessory information storage region 119 for always registering a Bluetooth address value of the accessory which is likely to exist in the periphery. Then, an IQ packet is broadcast from the Bluetooh communication part 117, and on receipt of an FHS packet, when any Bluetooth address value included therein does not include that registered in the accessory information storage region 119, information leakage from the portable telephone set 101 is prevented by limiting the predetermined function of the device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a mobile phone and a security control program for the portable electronic device, and more particularly to a portable electronic device and a security control program for the portable electronic device that prevent leakage of information as much as possible.

  Many portable electronic devices such as cellular phones, PHS (Personal Handy-phone System), PDA (Personal Digital Assistant), or personal computers that can be carried in a small size are used. Of these portable electronic devices, those equipped with a communication function such as a mobile phone often store information such as an address book and e-mail transmission / reception data. Furthermore, these portable electronic devices are often associated with personal privacy such as personal schedules, electronic memos or files, and store highly confidential information for work. With the increased functionality of portable electronic devices and the increased capacity of storage devices, portable electronic devices are increasingly becoming more likely to retain important information.

  On the other hand, since the portable electronic device is a device that is assumed to be carried by an individual, there is a high possibility that the portable electronic device may be misplaced or stolen. In such a case, there is a possibility that important information may be leaked. Therefore, there are many cases where various lock functions have been conventionally added to mobile phones. For example, if a mobile phone equipped with a remote lock function is lost, the user can place a lock on the device itself to prevent information leakage by calling the mobile phone from another phone such as a public telephone. You can stop the operation of various menus. In addition, a user who has lost a mobile phone can call a communication carrier and lock personal data such as a telephone directory by remote operation, or can lock a function of performing electronic payment with a mobile phone.

  In the conventional security system using such a lock function, the function is locked by remotely operating a portable electronic device such as a lost mobile phone. For this reason, the lock function cannot be activated when the portable electronic device exists in a place where radio waves do not reach from the base station, or when the portable electronic device does not have a communication function with the base station. Also, if the portable electronic device is abused before the original owner notices the loss, it will be too late to execute the lock function after that.

Therefore, the person who has the portable electronic device as the first device is allowed to have the second device that is paired with the first device, and the first device wirelessly communicates with the second device. When it is not possible or when the authentication means of the first device cannot authenticate the second device, it has been proposed to invalidate at least a part of the functions of the first device (for example, Patent Documents). 1). In this proposal, it is also proposed that Bluetooth (registered trademark) is used as wireless communication between the first device and the second device.
JP 2003-288328 A (paragraphs 0037 to 0039, FIG. 4)

  However, in this proposal, it is decided to mutually authenticate whether the first device and the second device are in a pair relationship. This is because both the first device and the second device have a configuration capable of providing both a master and a slave status in Bluetooth communication. For this reason, the processing of the entire authentication is complicated, and it is indispensable that both the first device and the second device have a high communication processing function, and there is a problem that the entire security system becomes expensive.

  Accordingly, an object of the present invention is to more simply realize a system that avoids the risk of information leakage due to loss or theft based on whether communication with other communication devices using short-range communication means is possible. It is an object of the present invention to provide a portable electronic device and a security control program thereof.

  According to the first aspect of the present invention, (b) near field communication means for transmitting and receiving radio at a short distance, and (b) communication apparatus existing around the current position as a master communication apparatus by this near field communication means. A registration-time identification information acquisition means for obtaining a response and obtaining unique identification information about the slave communication device that has responded; and (c) a desired identification among the identification information acquired by the registration-time identification information acquisition means. Identification information registration means for registering information, and (d) after registering the desired identification information with the identification information registration means, a response is made to the communication device existing around the current position using the short-range communication means. Monitoring time identification information acquisition means for obtaining unique identification information of the communication device that has responded, and (e) the monitoring time identification information acquisition means that matches the identification information registered in the identification information registration means Matching identification information presence / absence judging means for judging whether or not it is obtained, and (f) function restriction for restricting a predetermined function when it is not judged that the matching identification information presence / absence judging means has obtained matching identification information. A portable electronic device.

  In other words, in the present invention, the portable electronic device is provided with a short-range communication means such as a Bluetooth communication means. The identification information related to the electronic device is selected and registered by the identification information registration means. After registration of the identification information, a response is obtained from the communication device existing around the current position using the short-range communication means, and the unique identification information of the communication device that has responded is acquired by the monitoring-time identification information acquisition means. Like to do. When the monitoring identification information acquisition means does not acquire the same identification information registered in the identification information registration means, that is, even if there is no response from the communication device or there is a response, the identification information is the identification information registration means. If they do not match those registered in the above, a predetermined function out of the functions as the portable electronic device is restricted by the function restricting means.

  As described above, in the present invention, on the assumption that the portable electronic device to be protected at the same time often does not form a pair, the portable electronic device to be protected is set as the master and other communication is performed. By making the device a slave, communication processing between the two is simplified. This makes it possible to realize a security system that is cheaper than before.

  According to the sixth aspect of the present invention, as a security control program for a portable electronic device, (b) this short-range communication is provided in a computer of a communication device having a short-range communication means for transmitting and receiving radio at a short distance and having a status as a master. A registration-time identification information acquisition process for requesting a response as a master communication device to a communication device existing around the current position and acquiring unique identification information about the slave communication device that has responded, (I) an identification information registration process for registering desired identification information from among the identification information acquired by the identification information acquisition process at the time of registration; (c) after registering the desired identification information in the identification information registration process, The identification information at the time of monitoring that uses a distance communication means to obtain a response to a communication device existing around the current position and acquires unique identification information of the communication device that responded (D) a matching identification information presence / absence determination process for determining whether or not an identification information registered in the identification information registration process is acquired in this monitoring identification information acquisition process; When the identification information presence / absence determination process does not determine that matching identification information is acquired, a function restriction process for limiting a predetermined function is executed.

  That is, in the present invention, the security control program stored in the portable electronic device realizes processing using a computer based on the same principle as that of the first aspect of the present invention. That is, in the present invention, on the assumption that portable electronic devices to be protected are not often paired with each other, the portable electronic device to be protected is a master and other communication devices. By executing the process of making the slave as a slave, the communication process between the two is simplified. This makes it possible to realize a security system that is cheaper than before.

  As described above, according to the present invention, unlike the proposal described as the prior art, it is not necessary to perform a master / slave switching process, so that the apparatus configuration and the program are simplified. Further, since mutual authentication is not necessary, there is no need for the paired devices to hold the paired information together, thereby improving the reliability of security.

  Moreover, in the present invention, if the portable electronic device as a master registers the identification information of a plurality of communication devices as slaves, it becomes possible to place at least a part of the communication devices as slaves, These can be connected to a commercial power source. Therefore, not only can the effort to replace and charge the battery be reduced, but even if some communication devices are lost or cannot be carried, even if the security of portable electronic devices is incomplete can do.

  Hereinafter, the present invention will be described in detail with reference to examples.

  FIG. 1 shows the configuration of a security system when a cellular phone is used as a portable electronic device as an embodiment of the present invention. The mobile phone security system 100 includes a mobile phone 101, a user 102 that possesses the mobile phone 101, and an accessory 103 as an article that the user 102 wears or places near the user 102 for a relatively long time. ing. The mobile phone 101 and the accessory 103 can communicate with each other via Bluetooth.

  FIG. 2 shows a circuit configuration of a mobile phone that constitutes a part of the security system. The cellular phone 101 includes a control unit 113 including a CPU (Central Processing Unit) 111 and a control program storage memory 112 that partially stores a control program executed thereby. The control unit 113 is a part that performs overall control of the mobile phone 101, and some of the functions are realized by software. The control unit 113 is connected to each unit constituting the mobile phone 101.

  Of these, the operation unit 115 is a part for setting various functions and performing an input operation for communication, and includes a plurality of key switches (not shown). The display unit 116 includes a liquid crystal display, an organic EL (electroluminescence) display, and a display driving circuit (both not shown), and is used for confirming setting contents and displaying various visual data. Is done. The Bluetooth communication unit 117 is configured to perform Bluetooth wireless communication with the accessory 103 illustrated in FIG.

  The storage device 118 includes an accessory information storage area 119 for storing accessory information as information on the accessory 103 shown in FIG. 1, and stores various types of information. The storage device unit 118 may also be used as the control program storage memory 112 in the control unit 113. The A / D converter 121 converts an audio signal as an analog signal input from the microphone 122 into a digital signal. The D / A converter 123 converts the sound signal as a digital signal into an analog signal and supplies the analog signal to the receiver 124. Here, the microphone 122 and the receiver 124 are devices for realizing voice communication, which is a function as a general telephone. The data encoding / decoding processing unit 125 is connected to a radio unit 127 with an antenna 126 attached, and encodes data to be transmitted to a mobile communication network via a base station (not shown) and sends the encoded data to the radio unit 127. Data received by the wireless unit 127 is decoded.

  Naturally, the cellular phone 101 may include additional circuits such as a digital camera and a television receiver (not shown).

  FIG. 3 shows the circuit configuration of the accessory. The accessory 103 of the present embodiment is like a decorative article, a wristwatch, a hearing aid, or a trouser belt that the user 102 shown in FIG. 1 usually wears. The accessory 103 includes a control unit 133 including a CPU 131 and a control program storage memory 132 that partially stores a control program executed by the CPU 131. The control unit 133 is connected to the Bluetooth communication unit 134. The control program storage memory 132 is provided with an address value storage area 135 for storing an accessory-side Bluetooth address value as a unique value.

  As described above, the cellular phone 101 shown in FIG. 2 and the accessory 103 shown in FIG. 3 include the Bluetooth communication units 117 and 134, respectively, and perform Bluetooth communication therebetween. In Bluetooth communication, peer-to-peer data transmission / reception can be performed between two devices, and communication can also be performed by configuring a network with three or more devices. At this time, the device that starts communication first becomes the master, while the other devices communicate as slaves or participate in the network. In the security system 100 (FIG. 1) of this embodiment, a master device is fixed to the mobile phone 101. The accessory 103 has a status as a slave. For this reason, the cellular phone 101 according to the present embodiment needs to read and register the accessory-side Bluetooth address value stored in the address value storage area 135 of the accessory 103.

  FIG. 4 shows how the accessory side Bluetooth address value is registered. Here, the description is made by replacing the accessory 103 shown in FIG. 1 with a pedometer 141 that the user 102 usually carries. In Bluetooth communication, the mobile phone 101 and the pedometer 141 can communicate at a distance of about 10 meters. Therefore, the user 102 can monitor the mobile phone 101 not only when he / she goes out but also when the pedometer 141 is placed at the entrance or his / her own study at home.

  This will be described with reference to FIG. First, the user 102 operates the operation unit 115 of the mobile phone 101 to display a menu screen on the display unit 116 (step S201). In this state, the control unit 113 monitors whether the user 102 selects the “accessory registration” menu item using the operation unit 115 (step S202) or other menu items (step S203). is doing. When the other menu item is selected (step S203: Y), the selected menu item is executed (step S204).

  On the other hand, when the menu item “accessory registration” is selected (step S202: Y), the control unit 113 broadcasts an inquiry packet called an IQ (Inquiry) packet via the Bluetooth communication unit 117 (step S202). S205). If the pedometer 141 as a slave exists in the vicinity of the mobile phone 101 (for example, within 10 mails), the pedometer 141 transmits an FHS (Frequency Hop Synchronization) packet in response to the reception of the IQ packet. Therefore, if the FHS packet is not received by the Bluetooth communication unit 117 within a predetermined time (step S206: N), the “accessory registration” process ends (end). The predetermined time is measured using a response confirmation timer realized by, for example, CPU 111 counting the clock signal input to control unit 113 by software.

  On the other hand, when the pedometer 141 exists in the vicinity of the mobile phone 101 (for example, within 10 mails), the FHS packet transmitted by the pedometer 141 within a predetermined time is received by the Bluetooth communication unit 117 (step S206: Y ).

  FIG. 5 shows an example of the state of communication at the time of registration of the cellular phone as the master and the pedometer as the slave. The mobile phone (master) 101 repeatedly broadcasts IQ packets. When the pedometer 141 as a slave receives this IQ packet, the FHS packet can be returned within a predetermined time.

  Incidentally, the FHS packet received from the pedometer 141 in step S206 in FIG. 4 includes the accessory side Bluetooth address value of the pedometer 141 stored in the address value storage area 135 shown in FIG. This accessory-side Bluetooth address value may be defined as information that allows the user 102 to determine that the accessory 103 such as the pedometer 141 is one of his / her accessories.

  The cellular phone 101 displays the accessory-side Bluetooth address value obtained from the received FHS packet on the display unit 116 (step S207). If the displayed accessory-side Bluetooth address value is the accessory-side Bluetooth address value of the pedometer 141 as the target accessory, the user 102 operates the operation unit 115 to select it as the target accessory (step S208: Y). . In this case, the control unit 113 acquires the accessory-side Bluetooth address value from the FHS packet and registers it in the accessory information storage area 119 of the storage device unit 118 (step S209).

  On the other hand, when the user 102 performs an operation input to reject the selection from the operation unit 115 as not being the target accessory (step S208: N, step S210: Y), the “accessory registration” process ends. For example, when another person's Bluetooth communication device (not shown) happens to respond to the FHS packet in response to the IQ packet in step S205, the user 102 refuses the registration.

  Although not shown in FIG. 4, when a plurality of Bluetooth communication devices return FHS packets, the user 102 processes these in order. Such processing is repeated until no FHS packet is received from the periphery of the mobile phone 101.

  Next, security management of the mobile phone 101 after the user 102 registers the pedometer 141 as his / her accessory as a slave will be described. First, an operation in which the user 102 sets on / off of the security function of the mobile phone 101 will be described. When the security function is turned on, a process is automatically performed so that information on the mobile phone 101 is not leaked to another person in a situation where communication with the pedometer 141 has occurred. On the other hand, when the security function is turned off, such processing is not performed. For example, when the pedometer 141 is temporarily repaired as a result of repair, the mobile phone 101 is used unless the security function is turned off until the pedometer 141 returns from repair. It becomes impossible or the function is limited.

  FIG. 6 shows the state of processing when security function on / off setting processing is performed as another menu item in step S204 of FIG. The user 102 shown in FIG. 1 operates the operation unit 115 shown in FIG. 2 to display the menu screen for setting the operation invalid automatic switching function on the display unit 116 (step S221). Here, the setting of the operation invalid automatic switching function is a setting of whether the security function is turned on or off. When the user 102 selects the operation invalid automatic switching function setting ON by operating the operation unit 115 (step S222: Y), the control unit 113 turns on the operation invalid automatic switching setting flag assigned to a predetermined area of the storage device unit 118. (Step S223).

  On the other hand, when the user 102 selects setting of the operation invalid automatic switching function off by operating the operation unit 115 (step S224: Y), the control unit 113 sets the operation invalid automatic switching setting flag to off (step S225). ). At this time, the control unit 113 determines whether or not a connection confirmation timer as a timer different from the response confirmation timer is in operation (step S226). The connection confirmation timer is a timer for measuring a check interval when periodically checking whether or not the mobile phone 101 can continue to communicate with the pedometer 141 as an accessory, and is similarly controlled by the CPU 111. This can be realized by counting the clock signal input to the unit 113 by software. The time interval of the connection confirmation timer is a relatively long time such as one minute, three minutes, five minutes, or ten minutes in order to reduce power consumption required for communication of the mobile phone 101. The time until the connection confirmation timer times out is set in advance as a default value, and the user 102 can change it as necessary.

  If it is determined in step S226 that the connection confirmation timer is in operation (Y), the connection confirmation timer does not need to be operated thereafter. Therefore, the timing operation is stopped and the measured time is reset (step S227). If the connection confirmation timer is not operating (step S226: N), such processing is unnecessary, and the security function on / off setting processing is terminated as it is (end).

  FIG. 7 shows the flow of processing when the security function is on. Note that when the security function is off, the mobile phone 101 shown in FIG. 1 does not need to communicate with the pedometer 141, so no processing is performed and the function is stopped or restricted. Nor.

  In the state shown in FIG. 7 in which the security function is on, the control unit 113 of the mobile phone 101 on the master side shown in FIG. 2 repeatedly broadcasts IQ packets (step S241). As a result of receiving this IQ packet, when an FHS packet is sent to the mobile phone 101 within a predetermined time (step S242: Y), the Bluetooth communication unit 117 identifies ID (Identification) to the Bluetooth communication unit 134 (FIG. 3). ) The packet is transmitted (step S243). Then, it is checked whether any of the Bluetooth address values of the FHS packet received within the predetermined time matches the accessory-side Bluetooth address value registered in the accessory information storage area 119 (step S244).

  FIG. 8 shows the state of communication between the master and the slave in steps S241 to S243 in FIG. In step S241, the IQ packet is transmitted from the cellular phone 101 as the master to the pedometer 141 as the slave, and the FHS packet is transmitted from the pedometer 141 to the cellular phone 101 in the next step S242. In step S243, an ID packet is sent from the mobile phone 101 to the pedometer 141.

  By the way, it is assumed that another person's Bluetooth communication device is present around the mobile phone 101 together with the pedometer 141 of the user 102. In this case, if both the pedometer 141 and another person's Bluetooth communication device respond at different times, the mobile phone 101 receives the Bluetooth address values from these two devices. As described above, the mobile phone 101 may receive two or more Bluetooth address values. If at least one of these Bluetooth address values matches the Bluetooth address value registered in the accessory information storage area 119, It is confirmed that the telephone 101 is around the pedometer 141.

  In addition, when a plurality of Bluetooth communication devices exist around the mobile phone 101, FHS packets may be received in competition. In order to avoid such a failure in reception due to contention thereafter, a technique may be adopted in which each Bluetooth communication device is caused to transmit an FHS packet after an elapsed time determined by a random number, for example. Regarding these countermeasures in the case of conflict, a known method can be adopted, and therefore details are not described in the processing of FIG. The same applies to the processing of FIG.

  Returning to FIG. 7, the description will be continued. If it is detected in step S244 that one of the Bluetooth address values of the FHS packet matches the accessory-side Bluetooth address value registered in the accessory information storage area 119 (Y), the mobile phone 101 is currently A check is made to see if the operation is disabled (step S245). If the operation invalidation setting is set (Y), the operation invalidation setting is canceled (step S246). Then, timing of the connection confirmation timer is started (step S247), and when the connection confirmation timer times out (step S248: Y), the processing is returned to step S241 again (return). That is, when a relatively long predetermined time has passed, such as 1 minute, 3 minutes, 5 minutes, or 10 minutes, the check as to whether the mobile phone 101 can communicate with the pedometer 141 is repeated again. It will be.

  On the other hand, if the operation invalidation setting is canceled in step S245 (N), the mobile phone 101 proceeds to step S247 with the normal function being enabled and proceeds to the mobile phone 101 at the cycle of the connection confirmation timer. It is checked whether or not can maintain communication with the pedometer 141. At this point, the user 102 can continue to use the mobile phone 101 normally.

  On the other hand, if the FHS packet is not received within the predetermined time in step S242 (N), or the Bluetooth address value of the FHS packet received in step S244 is registered in the accessory information storage area 119. If it does not coincide with the side Bluetooth address value (N), it is checked whether or not the mobile phone 101 is currently set to operation invalid (step S249). If the operation is not disabled (N), the operation is disabled (step S250). In other words, from this point on, the cellular phone 101 is in an operation invalid state except for some functions of the Bluetooth communication unit 117 and the control unit 113. For example, the cellular phone 101 can perform a call or communication regardless of how the operation unit 115 is operated. I can't. In addition, data stored in the storage device 118 cannot be read or written. By such processing, information stored in the mobile phone 101 is prevented from leaking to others. Then, the control unit 113 proceeds to step S247 and subsequent steps, and when the connection confirmation timer times out (step S248: Y), the process returns to step S241 again (return).

  On the other hand, when the operation invalidation setting has already been performed in step S249 (Y), the process proceeds to step S247 and subsequent steps while maintaining the operation invalidation setting. That is, as long as the master cellular phone 101 maintains a state in which it cannot communicate with the pedometer 141 that is in a slave relationship with this, the operation invalidation setting is maintained.

  As described above, according to the mobile phone security system 100 according to this embodiment, the user 102 as the original owner of the mobile phone 101 can communicate with the pedometer 141 as an accessory without being aware of anything. If the distance is not maintained, the function of the mobile phone 101 can be automatically disabled. Therefore, even if the mobile phone is lost, other people cannot operate the mobile phone, so that information leakage can be prevented without seeing personal information without permission. Even if the mobile phone 101 is lost once, if it returns to its original state, it automatically returns to an operable state.

  In this embodiment, the mobile phone 101 has a function of registering accessories. Therefore, there is no restriction on the combination of the mobile phone 101 and the accessory. For example, when the mobile phone 101 is replaced, the operation invalidity automatic switching function of the present invention can be continuously used with the combination of the mobile phone 101 and an existing accessory.

  <Modification of the invention>

  FIG. 9 shows a security system for a mobile phone according to a modification of the present invention. In the mobile phone security system 100 </ b> A of this modified example, the user 102 registers three accessories in the mobile phone 101. The first accessory 103 is a pedometer 141 that the user 102 can wear when going out. A second accessory 103 is a home accessory 301 disposed in the home 302 of the user 102. This is, for example, a charger main body of a pedometer 141, and a Bluetooth communication device is similarly incorporated therein. Although the household accessory 301 is connected to a commercial power source (not shown), there is no possibility that the power source will be exhausted. The third is a work accessory 304 arranged in the vicinity of his / her desk of the user's 102 commuting company 303. This is, for example, a personal computer of the same, and similarly a Bluetooth communication device is incorporated.

  The user 102 stores the accessory-side Bluetooth address values of the pedometer 141, the household accessory 301, and the workplace accessory 304 as three accessories in the accessory information storage area 119A of the mobile phone 101A (see the accessory information storage area 119 in FIG. 2). Registered. Therefore, even when the user 102 forgets to have the pedometer 141 to wear, the user can use the cellular phone 101A in the home 302 and at the company 303 as usual.

  Further, even when the pedometer 141 is lost, the operation invalidation automatic switching setting flag described with reference to FIG. 6 is set to OFF while the mobile phone 101A can be used in the home 302 or the company 303 (step S225). Therefore, the mobile phone 101 can be used even when going out. Of course, the user 102 goes to a nearby mobile phone supply store, purchases a new accessory, registers the Bluetooth address value in the mobile phone 101A, and deletes the lost Bluetooth address value of the pedometer 141 from the registration. It is desirable to set the operation invalid automatic switching setting flag to ON (step S223).

  If the user 102 tends to forget to bring the accessory 103 when going out, the Bluetooth communication device can be incorporated into a plurality of articles such as bags, leather shoes, belts, and periodic holders, and a plurality of accessories 103 of this embodiment can be carried at the same time. It is also possible to do so.

  In the embodiment, the mobile phone 101 is the target of the security system, but the present invention can be applied to all portable electronic devices such as PHS, PDA, small-sized portable personal computers or portable music players. Is natural.

1 is a system configuration diagram of a security system when a mobile phone is used as a portable electronic device as an embodiment of the present invention. FIG. It is a block diagram which shows the circuit structure of the mobile telephone which comprises some security systems of a present Example. It is a block diagram showing the circuit structure of the accessory of a present Example. It is a flowchart showing the mode of the registration process of the accessory side Bluetooth address value in a present Example. It is sequence explanatory drawing showing an example of the mode of communication at the time of registration of the mobile telephone as a master and the pedometer as a slave in a present Example. FIG. 5 is a flowchart showing the state when the security function on / off setting process is performed as another menu item in step S <b> 204 of FIG. 4. FIG. It is a flowchart showing the mode of processing when the security function is on. It is sequence explanatory drawing showing the mode of communication of the master and slave in step S241-step S243 of FIG. It is a system configuration | structure figure which showed the security system of the mobile telephone in the modification of this invention.

Explanation of symbols

100, 100A Mobile phone security system 101, 101A Mobile phone 102 User 103 Accessory 111, 131 CPU
112, 132 Control program storage memory 113, 133 Control unit 115 Operation unit 117, 134 Bluetooth communication unit 119 Accessory information storage area 141 Pedometer (accessory)
301 Household accessories 304 Workplace accessories

Claims (7)

Short-range communication means for transmitting and receiving wireless at short distance;
A registration-time identification information acquisition unit that obtains a response as a master communication device to a communication device existing around the current position by this short-range communication unit and acquires unique identification information about the slave communication device that has responded When,
Identification information registration means for registering desired identification information from among the identification information acquired by the registration information acquisition means at the time of registration;
After registering the desired identification information with this identification information registration means, the near-field communication means is used to obtain a response to the communication equipment existing around the current position, and the unique identification of the communication equipment that has responded Monitoring-time identification information acquisition means for acquiring information;
Coincidence identification information presence / absence discriminating means for discriminating whether or not the monitoring-time identification information acquiring means has acquired one that matches the identification information registered in the identification information registering means;
A portable electronic device comprising: a function limiting unit that limits a predetermined function when the matching identification information presence / absence determining unit does not determine that the matching identification information has been acquired.   A plurality of pieces of identification information can be registered in the identification information registration unit, and when the plurality of pieces of identification information are registered in the identification information registration unit, one or more of them coincide with each other. The portable electronic device according to claim 1, wherein the portable electronic device is a means for discriminating between the two.   2. The portable electronic device according to claim 1, wherein the short-range communication means is a communication means using Bluetooth, and the identification information is a Bluetooth address value of each communication device.   When the matching identification information presence / absence determination means determines that there is matching identification information, and the function restriction means restricts the predetermined function, a function restriction release means for releasing those function restrictions The portable electronic device according to claim 1, further comprising:   The monitoring-time identification information obtaining unit obtains a response to the communication device existing around the current position by using the short-range communication unit at a certain time, and the determination result of the coincidence identification information presence / absence determination unit each time 5. The portable electronic device according to claim 4, wherein the predetermined function is restricted by the function restricting means or the restriction is released by the function restriction releasing means. To a computer of a communication device having a position as a master equipped with a short-range communication means for transmitting and receiving radio at a short distance,
A registration-time identification information acquisition process for obtaining a response as a master communication device to a communication device existing around the current position by this short-range communication means and acquiring unique identification information about the slave communication device that has responded When,
An identification information registration process for registering desired identification information from among the identification information acquired by the identification information acquisition process at the time of registration;
After registering the desired identification information in this identification information registration process, the short distance communication means is used to obtain a response to the communication device existing around the current position, and the unique identification of the communication device that has responded Monitoring identification information acquisition processing for acquiring information;
A matching identification information presence / absence determination process for determining whether or not the identification information registered in the identification information registration process is acquired in the monitoring identification information acquisition process;
A security control program for a portable electronic device, wherein a function restriction process for restricting a predetermined function is executed when it is not determined that matching identification information is acquired in the matching identification information presence / absence determination process.   When it is determined that there is matching identification information in the matching identification information presence / absence determination process, and the predetermined function is already restricted by the function restriction process, a function restriction release process for releasing those function restrictions 7. The security control program for a portable electronic device according to claim 6, further comprising:

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