JP2007255037A - Theft preventing wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a theft preventing wire which allows only a person having legitimate authority to release a connecting lock thereof tied to an electronic appliance. <P>SOLUTION: According to the theft preventing wire, when a USB plug 13 of a key section 12 of the theft preventing wire 10 is inserted into a USB port 31 of a laptop computer 30, a releasing number generated at the key section 12 is notified to the laptop computer 30, and e-mailed to an address of the person having the legitimate authority. The key section 12 mechanically locks the USB plug 13 and the USB port 31 to each other. When the theft preventing wire 10 is disengaged, the e-mailed releasing number is notified via the laptop computer 30 to the key section 12. The key section 12 then releases the mechanical lock between the USB plug 13 and the USB port 31 only when a stored releasing number coincides with the notified releasing number. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an anti-theft wire, and more particularly to an anti-theft wire for safely connecting a portable electronic device.

  As an information processing terminal used in business, an electronic device such as a laptop computer is widely used because the desk space is small and a desk can be widely used. Since such electronic devices are small and light and portable, they are taken out of the workplace, for example, when working at home or on a business trip, and are used.

  Since portable electronic devices are easy to move, there is a high chance of being stolen. In the case of theft, leakage of internal data may become a serious social problem. For this reason, an electronic device cannot be easily moved by using a theft prevention wire that ties a portable electronic device to a table leg or the like.

Such an anti-theft wire is composed of a wire and a key portion that are tied to an electronic device and a leg of a desk. For example, the one described in Patent Document 1 is known. According to this anti-theft wire, after attaching the engagement tool to the electronic device, winding one end of the wire penetrating the key part around the leg of the desk and inserting the other end into the engagement tool The other end of the wire and the key portion are locked by being inserted into the key portion and locked. Thereby, since the electronic device is connected to the leg of the desk via the wire, theft can be prevented.
JP 2004-318426 A

  However, since the lock between the anti-theft wire and the electronic device can be unlocked by using the joint key, the anti-theft wire can be used by anyone who does not have the proper authority as long as the joint key is held. And the connection between the electronic device and the electronic device can be unlocked. As a result, the electronic device may be stolen.

  The present invention has been made in view of these points, and an object of the present invention is to provide an antitheft wire that can be unlocked only by a person who has a legitimate authority.

  In the present invention, as shown in FIG. 1, the anti-theft wire 10 includes a wire 11 and a key portion 12 that can be tied to a fixed object such as a desk 20, and the key portion 12 is a portable electronic device. A USB plug 13 that can be electrically connected to and communicated with a laptop computer 30 as a device, and can be mechanically locked to the USB port 31 after the USB plug 13 is inserted into the USB port 31 of the laptop computer 30. And the lock mechanism based on the first release number stored therein and the second release number transmitted from the laptop computer 30 via the USB port 31 and the USB plug 13. And a controller that controls to lock or unlock.

  The anti-theft wire 10 according to the present invention is configured such that the lock can be released by inputting the second release number to the laptop computer 30, so there is no physical key and the second release number is managed. Only those who have the right authority can unlock the lock.

  The antitheft wire of the present invention does not use a physical key, but uses electronic data having a first release number stored in the key part and a second release number sent from the electronic device. Therefore, there is an advantage that the security can be improved because it can be changed every time it is connected to the electronic device.

  In addition, the second release number input to the electronic device for releasing the lock can be managed by the administrator rather than managed by the user of the electronic device, so that the user can bring the electronic device without permission. This can also be prevented.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings, taking as an example a case where the present invention is applied to an anti-theft wire connected to a laptop computer.
First, a usage example of the antitheft wire will be described.

FIG. 1 is a diagram showing an example of using an anti-theft wire.
The anti-theft wire 10 includes a wire 11 and a key portion 12, and a USB plug 13 of USB (Universal Serial Bus) standard is integrally provided in the key portion 12. The wire 11 of the anti-theft wire 10 has a free end in a ring and is wound around the leg of the desk 20 through the ring, and the USB plug 13 is a general-purpose communication port provided in the laptop computer 30. It is inserted into the USB port 31 and electrically connected.

  When the USB plug 13 is inserted into the USB port 31, a predetermined process is performed between the key unit 12 and the laptop computer 30, and the key unit 12 is controlled to mechanically lock the USB connection part. As a result, the antitheft wire 10 is mechanically connected to the laptop computer 30.

  When the antitheft wire 10 is removed to move the laptop computer 30, similarly, a predetermined process is performed between the key unit 12 and the laptop computer 30, and the key unit 12 is connected to the USB connection portion. Control to unlock. As a result, the antitheft wire 10 can pull out the USB plug 13 from the USB port 31.

Next, an example of a lock mechanism in which the antitheft wire 10 can be mechanically locked or unlocked to the laptop computer 30 will be described.
FIGS. 2A and 2B are explanatory diagrams showing the locked and unlocked states of the USB connection part, where FIG. 2A shows the state before connection, FIG. The lock state at the time is shown. FIGS. 3A and 3B are explanatory views showing a configuration example of the actuator, in which FIG. 3A shows a state when the actuator is unlocked, FIG. (D) shows the cam position at the time of locking, and (E) shows the part that converts the reciprocating motion into the rotational motion.

  As shown in FIG. 2A, the USB port 31 mounted on the laptop computer 30 is provided with a guide 33 extending in the direction in which the USB plug 13 is inserted and removed from the housing 32, and the lower part of the figure. A plurality of contacts 34 are carried on this surface. Further, the housing 32 is provided with a projecting portion 35 for positioning in the height direction when the USB plug 13 is inserted at a lower opening end in the figure.

  On the other hand, the USB plug 13 is similarly provided with a guide 15 in the housing 14 and a plurality of contacts 16 carried on the upper surface of the figure. In the guide 15, a rotating shaft 17 and a cam 18 fixed to one end thereof are provided. As shown in FIG. 3E, the other end of the rotating shaft 17 is connected to a sleeve 19, and the sleeve 19 has a guide groove 19a formed obliquely with respect to the longitudinal axis. Have.

  As shown in FIG. 3A, the sleeve 19 is provided with an actuator 21 that rotates the rotary shaft 17 by 90 degrees. In the actuator 21, permanent magnets 23 and 24 are disposed at both ends of a sleeve 22, and a plunger 25 is disposed so as to be movable back and forth in the axial direction therebetween. A shaft 26 extending through the permanent magnet 23 is fixed to the plunger 25. The tip of the shaft 26 is fitted into the sleeve 19, and a guide pin 27 is implanted so as to penetrate the guide groove 19 a of the sleeve 19. A coil 28 is wound around the outer periphery of the sleeve 22.

  Here, in order to lock the USB connection portion, first, as shown in FIG. 2B, the USB plug 13 is inserted into the USB port 31 and the cam 18 is rotated. That is, when the USB plug 13 is inserted into the USB port 31, the actuator 21 has the plunger 25 adsorbed by the permanent magnet 24 as shown in FIG. As shown in FIG. 3B, the major axis is in the horizontal direction and is housed in the housing 14. Here, when a current is passed through the coil 28, the plunger 25 repels the permanent magnet 24 and attracts the permanent magnet 23, and as shown in FIG. Moving. At this time, as the guide pin 27 fixed to the shaft 26 advances straight in the right direction in the figure, the sleeve 19 rotates, and when the plunger 25 is attracted to the permanent magnet 23, the sleeve 19 rotates 90 degrees and the cam 18 As shown in FIG. 3D, the major axis is in the vertical direction. As a result, the cam 18 is engaged with the protrusion 35 as shown in FIG. 2C, and the USB plug 13 cannot be removed from the USB port 31.

  On the other hand, in order to unlock the USB connection portion, the actuator 21 is changed from the state shown in FIG. 3C to the state shown in FIG. Since the transition is made, the cam 18 transitions from the state shown in (D) of FIG. 3 to the state shown in (B), and the USB connection portion is changed from the locked state shown in (C) of FIG. 2 to (B). It is possible to enter the unlocked state.

Next, the hardware configuration of the control unit provided in the key unit 12 of the antitheft wire 10 will be described.
FIG. 4 is a block diagram showing a hardware configuration of the key unit.

  The key unit 12 includes a control unit 40 that controls locking or unlocking of the USB connection part. The control unit 40 includes a CPU (Central Processing Unit) 41, a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, an input / output interface 44, and a drive circuit 45, which are interconnected by a bus 46. Has been.

  The CPU 41 controls the entire control unit 40. The ROM 42 stores an OS (Operating System) program executed by the CPU 41 and application programs necessary for lock control. The RAM 43 temporarily stores at least a part of the OS program and application programs, and stores various data necessary for the processing of the CPU 41. The control unit 40 is preferably constituted by a one-chip IC in which these functions are integrated.

  The input / output interface 44 communicates with the laptop computer 30 via the USB plug 13. The drive circuit 45 controls the drive of the actuator 21 of the key unit 12.

Next, the hardware configuration of the laptop computer 30 connected to the antitheft wire 10 will be described.
FIG. 5 is a block diagram showing a hardware configuration of the laptop computer.

  The laptop computer 30 has a CPU 51, and the CPU 51 includes a ROM 52, a RAM 53, a hard disk drive (HDD) 54, a graphic processing device 55, an input / output interface 56, and a communication interface 57. It is connected to the.

  The CPU 51 governs overall control of the laptop computer 30. The ROM 52 stores a BIOS (Basic Input Output System) that is a program group for controlling peripheral devices. The RAM 53 temporarily stores at least part of an OS program and various application programs executed by the CPU 51, and stores various data necessary for the processing of the CPU 51. The HDD 54 stores OS programs, application programs, and the like.

  The application program includes a lock / unlock processing program for controlling the anti-theft wire 10, a mail transmission program for transmitting mail according to a mail address, a mail receiving program for a user to browse the mail, and the like.

  The graphic processing device 55 displays an image on the monitor in accordance with a command from the CPU 51 when executing the unlock processing program or the like. The input / output interface 56 transmits / receives data to / from an externally connected smart card reader, the antitheft wire 10, and the like, and the communication interface 57 is connected to a mail server or the like via a network such as the Internet.

  Next, the functional configuration of the antitheft wire 10 according to the first embodiment realized by the above hardware configuration and the laptop computer 30 to which the wire is connected will be described.

FIG. 6 is a block diagram showing a functional configuration of the antitheft wire and laptop computer according to the first embodiment.
The control unit 40 provided in the key unit 12 of the antitheft wire 10 includes a release number generation unit 61, a data storage unit 62, a release number transmission unit 63, an address transmission unit 64, a lock control unit 65, and a release number reception unit 66. The determination unit 67 and the release control unit 68 are provided.

  When the USB plug 13 of the antitheft wire 10 is connected to the USB port 31 of the laptop computer 30, the release number generation unit 61 randomly generates a release number that is used when unlocking the USB connection part. Then, the data storage unit 62 stores the generated release number and the legitimate user's mail address set in advance. The cancellation number transmission unit 63 and the address transmission unit 64 transmit the generated cancellation number and a mail address preset in the data storage unit 62 to the laptop computer 30. The lock control unit 65 controls to mechanically lock the USB connection part.

  The release number receiving unit 66 receives the release number from the laptop computer 30 when moving the laptop computer 30. The determination unit 67 determines whether the received release number matches the release number stored in the data storage unit 62, and the release control unit 68 releases the mechanical lock of the USB connection portion. Control to do.

  The laptop computer 30 includes a connection recognition unit 71, a release number reception unit 72, an address reception unit 73, a mail notification unit 74, a lock request unit 75, a release reception unit 76, and a release request unit 77.

  The connection recognition unit 71 recognizes the connection of the USB plug 13 to the USB port 31, and the release number receiving unit 72 and the address receiving unit 73 receive the release number and mail address transmitted from the key unit 12, respectively. The mail notification unit 74 notifies a predetermined mail transmission program to transmit a mail including the received release number to the received mail address. The lock request unit 75 requests the control unit 40 of the key unit 12 to lock the USB connection part.

  The cancellation receiving unit 76 receives a cancellation request when moving the laptop computer 30. The release request unit 77 requests the controller 40 of the key unit 12 to unlock the USB connection part together with the release number input by the user when the release request is received.

  Next, state transition in the process of mechanically locking the USB connection portion between the USB plug 13 of the antitheft wire 10 and the USB port 31 of the laptop computer 30 will be described.

FIG. 7 is a diagram showing state transition in the process of locking the USB connection part.
When the USB connection portion is locked, the operation of the antitheft wire 10 is realized by a program that executes the above function of the key unit 12, and the operation of the laptop computer 30 is a program that executes the above function, that is, a lock processing program. And realized by a mail transmission program.

  First, when the USB plug 13 is connected to the USB port 31, in the laptop computer 30, the USB connection is recognized by the connection recognition unit 71 (step S11), the lock processing program is activated, and the key unit 12 has a release number. Is requested (step S12).

  In the control unit 40 of the key unit 12, the release number generation unit 61 generates a release number in response to a request for the release number from the laptop computer 30 (step S13), and the generated release number is stored in the data storage unit 62. And is transmitted to the laptop computer 30 by the release number transmission unit 63 (step S14).

  In the laptop computer 30, the release number receiving unit 72 receives the release number transmitted from the key unit 12 (step S15), and then the lock processing program requests an address from the key unit 12 (step S16).

  In the control unit 40 of the key unit 12, in response to the address request from the laptop computer 30, the address transmission unit 64 transmits the mail address stored in the data storage unit 62 in advance to the laptop computer 30 (step S17). .

  In the laptop computer 30, when the address receiving unit 73 receives the mail address transmitted from the key unit 12 (step S18), the lock processing program notifies the mail transmission program of the previously received release number and mail address. (Step S19).

  When the mail transmission program receives the notification from the lock processing program (step S20), the mail transmission program transmits a mail including the notified release number to the address of the mail address (step S21).

When receiving the notification of transmission completion from the mail transmission program, the lock processing program requests the key unit 12 to lock (step S22).
When the control unit 40 of the key unit 12 receives a lock request from the laptop computer 30, the lock control unit 65 locks the USB connection unit (step S23).

  In addition, the mail transmitted by the mail transmission program is received by the user using the mail reception program, and the legitimate user obtains the mail including the release number necessary for unlocking the USB connection part. Can do.

  Next, state transition in the process of unlocking the USB connection portion between the USB plug 13 of the antitheft wire 10 and the USB port 31 of the laptop computer 30 will be described.

FIG. 8 is a diagram showing state transition in the process of releasing the lock of the USB connection part.
The control unit 40 and the laptop computer 30 of the key unit 12 execute processing according to the following steps when unlocking the USB connection.

  When the user moves the laptop computer 30 after unlocking the USB connection portion, the user first activates the unlock processing program of the laptop computer 30. The unlock receiving program 76 of the unlock processing program prompts the user to input a release number, and receives a lock release request when the user inputs the release number notified by mail (step S31). Then, the release request unit 77 transmits a lock release request together with the release number input to the control unit 40 of the key unit 12 (step S32).

  In the control unit 40 of the key unit 12, when the release number receiving unit 66 receives the unlock request from the laptop computer 30 together with the release number (step S33), the determination unit 67 stores the release number stored in the data storage unit 62. And the release number notified from the laptop computer 30 are compared to determine whether or not they match (step S34). If the release numbers match, the determination unit 67 determines that the release is possible (step S35), and the release control unit 68 releases the lock of the USB connection portion. If the release numbers do not match, the determination unit 67 determines that the release is not possible (step S36), and the lock is not released. Note that the determination unit 67 may notify the determination result to the unlock processing program. At this time, the unlock processing program displays that the release is successful if the release numbers match, and if the release numbers do not match, the unlock processing program displays the correct release number again to the user. An input may be prompted.

  In the above embodiment, the e-mail address is described as the address of a valid user of the laptop computer 30, but may be the address of the administrator of the laptop computer 30. In this case, the lock can only be released after obtaining approval from the administrator. Thereby, the management regarding the movement and take-out of the laptop computer 30 is facilitated.

  Next, the functional configuration of the antitheft wire 10 according to the second embodiment realized by the hardware configuration of FIG. 4 and the laptop computer 30a realized by the hardware configuration of FIG. 5 to which the wire is connected will be described. To do.

FIG. 9 is a block diagram showing a functional configuration of an antitheft wire and a laptop computer according to the second embodiment.
The control unit 40a provided in the key unit 12 of the antitheft wire 10 includes an identification number storage unit 81, an identification number transmission unit 82, a lock control unit 83, a card number reception unit 84, a determination unit 85, and a release control unit 86. I have.

  In the identification number storage unit 81, a unique identification number assigned to the antitheft wire 10 is stored in advance. The identification number transmission unit 82 transmits the identification number stored in the identification number storage unit 81 to the laptop computer 30a in response to a request from the laptop computer 30a. When there is a lock request from the laptop computer 30a, the lock control unit 83 controls to mechanically lock the USB connection part.

  The card number receiving unit 84 receives a card number necessary for unlocking from the laptop computer 30a when moving the laptop computer 30a. The determination unit 85 determines whether or not the received card number matches the identification number stored in the identification number storage unit 81, and the release control unit 68 locks the USB connection portion mechanically. Control to release.

  The laptop computer 30 a includes a connection recognition unit 91, an identification number reception unit 92, a card number acquisition unit 93, a determination unit 94, a lock request unit 95, a release reception unit 96, and a release request unit 97.

  The connection recognition unit 91 recognizes the connection of the USB plug 13 to the USB port 31 and requests the control unit 40a of the key unit 12 to transmit an identification number. The identification number receiving unit 92 receives the identification number transmitted from the control unit 40a. The card number acquisition part 93 acquires the card number memorize | stored in the smart card via the card reader connected to the laptop computer 30a. The determination unit 94 determines whether or not the acquired card number matches the received identification number, and the lock request unit 95 requests the control unit 40a of the key unit 12 to lock the USB connection part.

  The cancellation receiving unit 96 receives a cancellation request when moving the laptop computer 30a. The release request unit 97 requests the controller 40a of the key unit 12 to unlock the USB connection part together with the card number acquired by the card number acquisition unit 93 when the release request is received.

  Next, state transition in the process of mechanically locking the USB connection portion between the USB plug 13 of the antitheft wire 10 and the USB port 31 of the laptop computer 30a will be described.

FIG. 10 is a diagram showing state transition in the process of locking the USB connection part.
Here, a smart card is attached to the antitheft wire 10, and the smart card stores a card number that is the same as or corresponds to the identification number stored in the identification number storage unit 81 of the control unit 40a. Suppose that The smart card is used when the anti-theft wire 10 is locked and unlocked.

  First, when the USB plug 13 is connected to the USB port 31, in the laptop computer 30a, the USB connection is recognized by the connection recognition unit 91 (step S41), the lock processing program is activated, and the identification number is assigned to the key unit 12. Is requested (step S42).

  In the control unit 40a of the key unit 12, in response to the request for the identification number from the laptop computer 30a, the identification number transmission unit 82 transmits the identification number stored in the identification number storage unit 81 to the laptop computer 30a ( Step S43).

  In the laptop computer 30a, the identification number receiving unit 92 receives the identification number transmitted from the control unit 40a (step S44), and the identification number received by the determination unit 94 and the card number acquired by the card number acquisition unit 93 Are compared to determine whether or not they match (step S45). If the two match, the determination unit 94 determines that the lock is possible (step S46), and transmits a lock request to the control unit 40a (step S47).

The control unit 40a of the key unit 12 receives a lock request from the laptop computer 30a, and the lock control unit 83 locks the USB connection unit (step S48).
If the identification number and the card number do not match in the determination result by the determination unit 94 of the laptop computer 30a, the determination unit 94 determines that the lock is impossible (step S49), and does not transmit a lock request to the control unit 40a.

  Next, state transition in the process of unlocking the USB connection portion between the USB plug 13 of the antitheft wire 10 and the USB port 31 of the laptop computer 30a will be described.

FIG. 11 is a diagram showing state transition in the process of releasing the lock of the USB connection part.
When the lock of the USB connection is released, the control unit 40a of the key unit 12 of the anti-theft wire 10 and the laptop computer 30a execute processing according to the following steps.

  When the user moves the laptop computer 30a after unlocking the USB connection portion, the user first activates the unlock processing program of the laptop computer 30a. When the unlock receiving program 96 receives a release instruction from the user (step S51), the unlock request unit 97 requests the controller 40a to release the lock together with the card number acquired by the card number acquiring unit 93. Transmit (step S52).

  In the control unit 40a of the key unit 12, when the card number receiving unit 84 receives the unlock request from the laptop computer 30a together with the card number (step S53), the determination unit 85 identifies the identification stored in the identification number storage unit 81. The number and the card number notified from the laptop computer 30a are compared to determine whether or not they match (step S54). If the numbers match, the determination unit 85 determines that the release is possible (step S55), and the release control unit 86 unlocks the USB connection part. If the numbers do not match, the determination unit 85 determines that the release is impossible (step S56), and the lock is not released.

It is a figure which shows the usage example of a wire for antitheft. It is explanatory drawing which shows the state of locking and unlocking of a USB connection part, Comprising: (A) shows the state before connection, (B) shows the unlocked state at the time of connection, (C) shows the lock at the time of connection Indicates the state. It is explanatory drawing which shows one structural example of an actuator, Comprising: (A) shows the state at the time of unlocking of an actuator, (B) shows the cam position at the time of unlocking, (C) is the state at the time of locking of an actuator (D) shows a cam position at the time of locking, and (E) shows a part for converting a reciprocating motion into a rotational motion. It is a block diagram which shows the hardware constitutions of a key part. It is a block diagram which shows the hardware constitutions of a laptop computer. It is a block diagram which shows the function structure of the antitheft wire and laptop computer which concern on 1st Embodiment. It is a figure which shows the state transition of the process which locks a USB connection part. It is a figure which shows the state transition of the process which cancels | releases the lock | rock of a USB connection part. It is a block diagram which shows the function structure of the antitheft wire and laptop computer which concern on 2nd Embodiment. It is a figure which shows the state transition of the process which locks a USB connection part. It is a figure which shows the state transition of the process which cancels | releases the lock | rock of a USB connection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antitheft wire 11 Wire 12 Key part 13 USB plug 20 Desk 30 Laptop computer 31 USB port

Claims (5)

In the anti-theft wire that is connected to a portable electronic device in a lockable manner,
A plug that is electrically connected to a communication port mounted on the electronic device, a lock mechanism that can be mechanically locked with the communication port after the plug is inserted into the communication port, and a first that is stored therein A key unit having control means for controlling the lock mechanism based on a release number of the electronic device and a second release number received from the electronic device via the communication port and the plug;
A wire having one end fixed to the key part and the other end having a ring for binding to a fixed object;
An antitheft wire characterized by comprising:   The control means generates a different first release number each time the plug is inserted into the communication port, and transmits the generated first release number to the electronic device as the second release number. 2. The anti-theft wire according to claim 1, wherein a mail function of the electronic device is used to notify the administrator of the electronic device by mail.   The control means is a release number generation unit that randomly generates the first release number in response to recognition of connection of the plug to the communication port on the electronic device side, and the generated first number A data storage unit for storing a release number and a mail address for notifying the user of the first release number by e-mail through the electronic device, and storing the first release number and the e-mail address in the electronic device A transmitting unit for transmitting, a receiving unit for receiving the first release number transmitted from the electronic device as the second release number, and a determination for comparing and determining the first release number and the second release number And the lock mechanism after the transmission of the first release number and the e-mail address by the transmission unit, and according to the determination result of the determination unit Anti-theft wire according to claim 1, characterized in that it has a control unit for controlling to unlock the click mechanism.   The control means includes an identification number storage unit in which a unique identification number is stored as the first release number, and the identification in response to the connection of the plug to the communication port being recognized on the electronic device side. A transmission unit that transmits a number to the electronic device, a determination unit that compares the identification number with the card number stored in the smart card and received as the second release number from the electronic device, and the electronic device side In response to the fact that the identification number transmitted by the transmitting unit and the card number coincide with each other, the lock mechanism is controlled to be locked and the lock mechanism is unlocked according to the determination result of the determination unit. The antitheft wire according to claim 1, further comprising a control unit that controls the antitheft. In an anti-theft method using an anti-theft wire that is connected to a portable electronic device in a lockable manner,
By computer
In response to the fact that the release number generating means recognizes the electrical connection of the plug of the antitheft wire to the communication port mounted on the electronic device on the electronic device side, the first release number Randomly generating, and
A data storage means for storing the generated first release number;
A transmission means for transmitting to the electronic device an e-mail address stored in advance by the data storage means for notifying a user of the first release number and the first release number by e-mail through the electronic device; ,
The lock control means controls to lock a lock mechanism that can be mechanically locked with the communication port after the plug is inserted into the communication port after the transmission of the first release number and the mail address by the transmission means. And steps to
Receiving means for receiving a second release number from the electronic device;
A step of determining and comparing the first release number and the second release number;
A step of controlling the release control means to release the lock of the lock mechanism according to the determination result of the determination means;
The anti-theft method characterized in that the process is executed.

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