Anti-theft device and program used therefor

Abstract

To provide an anti-theft device with high anti-theft effect. [Solution] An anti-theft device connected to an in-vehicle device having functions essential for unlocking and / or driving a vehicle, the anti-theft device comprising a main control module and an authentication module, wherein the main control module switches from the alert mode to the normal mode only when re-authentication is performed by the authentication module, controls the in-vehicle device to be disabled during the alert mode, controls the in-vehicle device to be enabled when switched to the normal mode, performs a re-authentication process when the vehicle system is started during the normal mode, and if the authentication fails, disables the in-vehicle device, renders the vehicle inoperable, and / or controls the system to be shut down.

Description

[Technical Field]

[0001] The present invention relates to a device and a program for preventing vehicle theft. [Background technology]

[0002] In recent years, smart key systems that allow vehicle doors to be locked / unlocked and the engine to be started without using a physical key have become widespread.

[0003] However, cars with smart key systems are at risk of theft through so-called relay attacks. Furthermore, there are a variety of methods for vehicle theft, such as CAN invaders and code grabbers.

[0004] In this situation, various anti-theft devices have been proposed not only by manufacturers but also by third parties (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7709790 [Patent Document 2] Patent No. 7652974 Summary of the Invention [Problem to be solved by the invention]

[0006] Patent Document 1 relates to an anti-theft device that uses a secret code to switch from monitoring mode to non-monitoring mode and prevents the engine from starting during monitoring mode. Patent Document 2 relates to an anti-theft device that connects a relay unit to a vehicle fuse box via a cable unit and cuts off power to a drive unit for driving door locks and to brake lights.

[0007] If switching from monitoring mode to non-monitoring mode is too easy, the risk of theft increases, and if it is too cumbersome, it becomes less user-friendly. In Patent Documents 1 and 2, switching from monitoring mode to non-monitoring mode is too easy. The object of the present invention is to provide an anti-theft device that improves the anti-theft effect without imposing an excessive burden on the user (appropriate driver). [Means for solving the problem]

[0008] An anti-theft device that is connected to an in-vehicle device having a function essential for unlocking and / or driving a vehicle and is configured to be switchable between an alert mode and a normal mode, a main control module; an authentication module; The main control module Only when authentication is performed by the authentication module, switching from the alert mode to the normal mode is performed; During the alert mode, the vehicle interior device is controlled to be disabled, and when the mode is switched to the normal mode, the vehicle interior device is controlled to be enabled; When the vehicle system is started during the normal mode, a re-authentication process is performed, and if the re-authentication fails, the in-vehicle device is disabled, the vehicle is rendered inoperable, and / or the system is controlled to be terminated.

[0009] The authentication module also includes a wireless communication module for performing authentication between the authentication module and the paired key terminal.

[0010] The authentication module also includes an input module for performing authentication by inputting a PIN.

[0011] The anti-theft device is connected to a CAN bus of the vehicle, The main control module disables the in-vehicle devices and / or shuts down the system via the CAN bus.

[0012] Additionally, during the alert mode, the main control module monitors communications within the CAN bus and blocks and / or disables abnormal communications.

[0013] The anti-theft device further comprises a machine learning module, The machine learning module classifies communications within the CAN bus during the normal mode through unsupervised learning, and considers communications outside the classification to be the abnormal communications.

[0014] The anti-theft device further includes a switching module capable of switching a state of a signal line and / or a power line for enabling the in-vehicle device between disconnection and connection, The main control module controls the switching module to disable the in-vehicle device.

[0015] The wireless communication module is capable of measuring the distance to the key terminal, The main control module When the distance between the wireless communication module and the key terminal becomes greater than a second distance, the normal mode is switched to the alert mode; When the distance between the wireless communication module and the key terminal is within a first distance that is smaller than the second distance, the security mode is switched to the normal mode.

[0016] The anti-theft device further includes a door lock control module, The main control module When the distance between the wireless communication module and the key terminal becomes greater than the second distance, the door lock control module is controlled to lock the doors of the vehicle. When the distance between the wireless communication module and the key terminal is within the first distance, the door lock control module is controlled to unlock the vehicle doors.

[0017] The authentication module supports a plurality of authentication methods, The re-authentication process requires an authentication method different from the authentication method used for switching to the normal mode immediately before the re-authentication process.

[0018] The anti-theft program executed by the anti-theft device is monitoring activation of the vehicle's systems during the normal mode; requesting re-authentication from the user and / or the paired key terminal when the activation is detected; If the re-authentication fails, controlling the in-vehicle device to be disabled and / or the system to be terminated, and if the re-authentication is successful, controlling the in-vehicle device and the system to be maintained in a normal mode; Equipped with. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a block diagram showing control of an anti-theft device according to a first embodiment of the present invention via a CAN bus connection. [Figure 2] FIG. 2 is a flowchart showing the operation of the anti-theft device according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a block diagram showing control by a switching module of an anti-theft device according to a second embodiment of the present invention. [Figure 4] FIG. 4 is a diagram showing the relationship between the operation of the anti-theft device according to the second embodiment of the present invention and the distance from the key terminal. [Figure 5] FIG. 5 is a flowchart showing the operation of the anti-theft device according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] (Embodiment 1) As shown in FIG. 1 , an anti-theft device 1 according to an embodiment of the present invention is connected between a steering wheel 185, an ESCL (Electronic Steering Column Lock) 188, an engine ECU (Electronic Control Unit) 163, a gear handle 181, and other vehicle ECUs 161 and 162, which are in-vehicle devices having functions essential for unlocking and / or driving the vehicle. A plurality of vehicle ECUs are typically provided in a vehicle; FIG. 1 shows only one example, but the present invention is not limited to this. The above are examples of in-vehicle devices, and other in-vehicle devices such as the engine, ignition, parking brake, power steering, and door locks may also be controlled. The number of in-vehicle devices to be controlled may be one or more, but the greater the number, the higher the security and cost. The engine ECU refers to an ECU that primarily controls the engine.

[0021] The anti-theft device 1 according to this embodiment includes a main control module 10, an authentication module 190, an ESCL control module 178 for controlling the ESCL 188, and CAN (Controller Area Network) transceiver modules 171-174 for communicating with the ECUs 161-163 and the gear handle 181, and transmits control signals for controlling in-vehicle devices via a CAN bus. The main control module 10 may function as a node on the CAN bus. The anti-theft device 1 may be installed in a physically hidden location that is difficult to detect by electronic scanning. If the anti-theft device 1 is improperly removed, the in-vehicle devices may be disabled, and the improper removal may be considered a theft. If the anti-theft device 1 is reconnected, the disablement may be canceled.

[0022] The main control module 10 may be any known processing device, such as a microcontroller.

[0023] The authentication module 190 may perform authentication via wireless communication, such as Bluetooth (registered trademark, including BLE), UWB (Ultra Wide Band), NFC (Near Field Communication), or RFID (Radio Frequency Identification). In this case, the authentication module 190 includes the necessary wireless communication module. To be used as a key terminal, the authentication module 190 cooperates with the main control module 10, etc., as necessary, to perform pre-authentication such as pairing. Note that two or more types of pairing (e.g., Bluetooth and NFC) may be performed on the same key terminal (e.g., a smartphone). In this way, using a physical key terminal can increase the level of theft prevention.

[0024] The key terminal may be a dedicated terminal for the anti-theft device 1, or may be a smartphone, tablet terminal, or the like capable of the above-mentioned wireless communication. The smartphone or the like is to be paired in advance before use, and may have a dedicated application for the anti-theft device 1 installed. The application may enable manual mode switching and may also be used to issue alarm notifications.

[0025] Furthermore, authentication module 190 may perform authentication by inputting a PIN for a steering wheel switch, air conditioner or window switch, shift button, or the like, in which case a storage unit for PIN information is provided inside or outside authentication module 190. Although authentication using such a secret code has a higher risk of leakage than a physical key, it also has the advantage of reducing the possibility of authentication failure due to equipment malfunction, etc. Authentication module 190 may be capable of individually supporting multiple authentication methods, or may perform authentication using a combination of multiple authentication means, and may be able to change the authentication combination, etc., through user settings.

[0026] The anti-theft device 1 is configured to be switchable between an alert mode and a normal mode. In the alert mode, the main control module 10 controls the in-vehicle devices to be disabled. When the device is switched to the normal mode, the main control module 10 controls the in-vehicle devices to be enabled. Any known method for disabling the in-vehicle devices may be used. For example, the disabling may be performed electronically by sending a command to disable the in-vehicle devices via an in-vehicle network such as a CAN bus or a LIN (Local Interconnect Network) bus, sending information that misleads the ECU into thinking that the in-vehicle devices are disabled, or by blocking, not enabling, or rewriting all commands that enable the in-vehicle devices and commands that are not recognized as normal. Alternatively, the anti-theft device 1 may include a switching module that can switch the state of the signal line and / or power line for enabling the in-vehicle devices between disconnected and connected, and the main control module may control the switching module to physically disable the in-vehicle devices. Furthermore, combining electronic and physical control can further enhance the theft prevention effect. Activation may be achieved by performing the reverse process of deactivation or a process to cancel deactivation.

[0027] The abnormal communication may be set in advance in the anti-theft device 1, or the anti-theft device may further include a machine learning module that classifies communications within the CAN bus in normal mode using unsupervised learning (e.g., K-means) and considers communications outside the classification to be abnormal communications.

[0028] The main control module 10 switches from the security mode to the normal mode only after authentication by the authentication module. This can enhance theft prevention. On the other hand, the switch from the normal mode to the security mode can be performed automatically, manually, or in combination.

[0029] For example, the device may automatically enter the alert mode when one or more, preferably all, of the vehicle's system shutdown, P shift, and parking brake ON are detected via communication within the CAN bus, etc. Alternatively, the device may automatically enter the alert mode when it detects that the connection with a key terminal using wireless communication with a relatively long authentication distance (Bluetooth, UWB, long-distance RFID, etc.) has been lost. Alternatively, the device may be manually switched to the alert mode when it detects all of the vehicle's system shutdown, P shift, and parking brake ON, and also detects authentication (touch authentication) with a key terminal using wireless communication with a relatively short authentication distance (NFC, short- to medium-range RFID, etc.), operation from a dedicated app or dedicated terminal, or PIN entry using a steering wheel switch, etc.

[0030] When the vehicle system is started in normal mode, the main control module 10 performs a re-authentication process. For example, authentication can be performed by detecting a connection with a key terminal using wireless communication (such as Bluetooth, UWB, or medium- to long-range RFID) with a medium or long-range authentication distance. If such authentication is not possible, the main control module 10 determines that the re-authentication has failed and disables the in-vehicle device and / or controls the system to shut down. Alternatively, the main control module 10 may issue a message requesting another authentication to the user, for example, by voice or a display on the navigation screen. The request may be made using one or more of an image, voice, video, or lamp, as appropriate.

[0031] If re-authentication is not performed within a predetermined time (e.g., 15 seconds, which can be set arbitrarily) after a request to the user, or if an incorrect PIN is entered, the re-authentication is determined to have failed, and the in-vehicle device is disabled and / or the system is controlled to be shut down. By requesting re-authentication in this way, the time required for a thief to perform the authentication can be extended without significantly increasing the burden on the user, thereby improving the theft prevention effect. In particular, when authentication is performed by detecting a connection with a wireless key terminal over a medium-range or longer authentication distance, there is no substantial increase in the burden on the user.

[0032] Here, the re-authentication at system startup may be the same as the authentication for switching to normal mode, or may be different. Here, separate personal identification numbers (PINs) may be set for switching to normal mode and for re-authentication. If different PINs are required, the user may be informed by voice or image that the re-authentication method is different from the previous authentication method, or the previous authentication method may not be used (cannot be used).

[0033] The method for disabling the in-vehicle device when re-authentication fails may be the same as described above. The method for making the vehicle inoperable is not particularly limited, and known methods (different from the method for disabling) can be used, such as electronically changing the shift position to P shift or turning on the parking brake. The method for shutting down the system is not particularly limited, and known methods can be used, such as sending a command to shut down the system, blocking all commands that enable the system and commands that are not recognized as normal, or rewriting them to invalid ones or normal ones.

[0034] Even after re-authentication fails, if any appropriate authentication or re-authentication is performed, the system will transition to normal mode or start up normally.

[0035] If the vehicle system is activated during alert mode, the vehicle cannot be driven due to the in-vehicle devices being disabled, so no special processing may be performed, but the main control module 10 may also perform processing such as shutting down the system or notifying of an abnormality using the horn or lamps.

[0036] Such a flow is shown in Figure 2. Steps S101 to S103 are the operation in the alert mode. When the alert mode is switched to (S101), the in-vehicle devices are disabled (S102), and this state is maintained until a switch to the normal mode is detected (S103). If an unauthorized operation or signal is detected during the alert mode, warning processing such as a report, a warning sound such as a horn, or lighting (flashing) a lamp may be performed.

[0037] When a switching operation is detected (Yes in S103), the mode is switched to the normal mode (S104), and the in-vehicle device is enabled (S105).

[0038] During the normal mode, the detection of system startup (S106) and the detection of a switching operation (S107) are repeated. When a switching operation is detected (Yes in S107), the mode is switched to the alert mode (S101).

[0039] If system startup is detected (Yes in S106), the system proceeds to re-authentication processing. First, it is determined whether the key terminal paired at that time can be detected (S108). If it can be detected (Yes in S108), the re-authentication is deemed successful, and the system enters a state in which the engine can be started, for example (S111). If the system is subsequently shut down by user operation (S112), the system returns to normal mode in the system shutdown state (S107). At this time, the system may also directly transition to alert mode (S101).

[0040] After this, if the user desires proper startup, S106, S108 to S110, etc. may be carried out appropriately.

[0041] If there is no paired key terminal (No in S108), re-authentication is requested by other means (NFC, app operation, PIN, etc.) (S109). After the re-authentication request, it is detected whether or not there is proper re-authentication, for example, for a predetermined time (S110). If there is proper re-authentication, the system proceeds to S111, and if there is not proper re-authentication, the system shuts down (S113) and enters alert mode (S101). It is also possible to enter alert mode (S101) if an incorrect PIN is entered multiple times (which can be set arbitrarily).

[0042] (Embodiment 2) This embodiment requires a key terminal, automatically switches between alarm mode and normal mode using distance information from the key terminal, and automatically locks / unlocks the doors using distance information from the key terminal, similar to a smart door lock. Furthermore, signal lines and power lines are cut off as a means for disabling in-vehicle devices. Other aspects are the same as those of the first embodiment. Some of the functions of the first embodiment (e.g., disabling in-vehicle devices using a CAN) may be replaced with or added to some of the functions of the second embodiment, or some of the functions of the second embodiment (e.g., automatically locking / unlocking the doors) may be replaced with or added to some of the functions of the first embodiment. This provides an anti-theft effect without substantially increasing the burden on the user. The re-authentication mechanism is the same as that of the first embodiment, and therefore will not be described again.

[0043] As shown in Fig. 3, an anti-theft device 1 according to another embodiment of the present invention is connected between an in-vehicle device 120 having functions essential for unlocking and / or driving the vehicle and a vehicle ECU (Electronic Control Unit) 101. A plurality of vehicle ECUs are usually provided in a vehicle, and Fig. 3 shows two vehicle ECUs 101 and 102 as an example.

[0044] The anti-theft device 1 includes a wireless communication module 30 capable of measuring the distance to a key terminal 130 paired with the anti-theft device 1, a switching module 20 capable of switching between disconnection and connection of a signal line and / or a power line for enabling the in-vehicle device 120, and a main control module 10. The distance to the key terminal 130 may be calculated by the wireless communication module 30 itself, or may be calculated by another module such as the main control module 10 based on the state of communication (communication strength, communication speed, etc.) between the key terminal 130 and the wireless communication module 30. In FIG. 3, the switching module 2 is provided so as to be capable of switching between disconnection and connection of the signal line between the in-vehicle device 120 and the vehicle ECU 101.

[0045] Referring to Figure 4, the main control module 10 controls the switching module 20 to disconnect at least one signal connection between the in-vehicle device 120 and the vehicle ECU 101 when the distance between the wireless communication module 30 and the key terminal 130 becomes greater than a second distance R2, and controls the switching module 20 to restore at least one signal connection between the in-vehicle device 120 and the vehicle ECU 101 to a connected state when the distance between the wireless communication module 30 and the key terminal 130 becomes within a first distance R1 that is smaller than the second distance R2.

[0046] In this way, when the distance between the wireless communication module 30 and the key terminal 130 becomes greater than the second distance R2, by disconnecting at least one signal connection between the in-vehicle device 120 and the vehicle ECU 101, even if a relay attack occurs, the in-vehicle device 120 will remain unusable, and functions essential for unlocking and / or driving the vehicle will not be performed, making it impossible to steal the vehicle.

[0047] Furthermore, when the distance between the wireless communication module 30 and the key terminal 130 is within a first distance R1, which is smaller than the second distance R2, at least one signal connection between the in-vehicle device 120 and the vehicle ECU 101 is restored to a connected state, so that even if the signal connection with the in-vehicle device 120 having a function related to unlocking is disconnected, the smart entry function becomes available after the connection is restored. Furthermore, when the signal connection with the in-vehicle device 120 having a function related to driving is disconnected, the smart entry function remains available even before the connection is restored, and the driving-related functions are not impaired after the connection is restored.

[0048] The second distance R2 may be set equal to the distance R3 that is the limit of connectability with the wireless communication module 30, or the limit of connectability distance R3 may be set greater than the second distance R2.

[0049] The main control module 10 may be the same as in the above-described embodiment 1. The wireless communication module 30 may be a known wireless communication device capable of measuring the distance to the key terminal 130, such as a wireless communication device that communicates using a communication protocol such as Bluetooth, BLE, NFC, or UWB, or may use multiple types of communication protocols and use them appropriately depending on the function.

[0050] The key terminal 130 may be a dedicated terminal for the anti-theft device 1, or may be a smartphone, tablet terminal, or the like capable of the above-mentioned wireless communication. The smartphone or the like may be paired in advance before use, and may have a dedicated application for the anti-theft device 1 installed.

[0051] Furthermore, regardless of the first distance R1 or the second distance R2, the state of the signal line and / or power line may be disconnected / connected by operating the key terminal (such as operating a dedicated button, operating on the app screen, touch authentication, etc.) or by entering a PIN using a steering wheel switch, etc.

[0052] The in-vehicle device 120 has a function essential for unlocking and / or driving the vehicle, and can be, for example, a door handle button 121, an accelerator sensor 122, or a gear 123 of the vehicle. The anti-theft device 1 may target one in-vehicle device 120, or may target two or more in-vehicle devices. By using, for example, a switching module 20 (door button signal line relay module 21, accelerator pedal signal line relay module 22, gear signal line relay module 23) that can disconnect / connect signal lines connected to the target in-vehicle device 120, it is possible to prevent unlocking or driving of the vehicle in the event of a relay attack, and thus prevent vehicle theft.

[0053] Note that the activation of the function of the in-vehicle device 120 may be terminated / prevented by a method other than interrupting the signal line between the in-vehicle device 120 and the vehicle ECU 101, such as by cutting off the power line that supplies power to the in-vehicle device 120. Also, the relay module as the switching module is an example, and other switching means may be used. Also, the installation location of the anti-theft device 1 may be set appropriately depending on the position and wiring of the in-vehicle device 120 that performs switching.

[0054] The main control module 10 can measure the distance to the key terminal 130, for example, using the strength of communication between the wireless communication module 30 and the key terminal 130, although other measurement methods may also be used. The first distance R1, the second distance R2, and the limit distance R3 at which connection is possible may be set as appropriate; for example, R1 may be 2 m, R2 may be 5 m, and R3 may be 20 m. Note that while FIG. 4 shows the distance from the center of the vehicle, the reference position for distance measurement will vary depending on the actual installation location of the anti-theft device 1 (wireless communication module 30).

[0055] Here, by making the first distance R1 larger than the distance at which the automatic door unlock function of the vehicle's smart entry function is activated, the automatic door unlock function of the smart entry function can be more reliably activated. Also, by making the second distance R2 larger than the distance at which the automatic door lock function of the vehicle's smart entry function is activated, the reliability of performing anti-theft switching after the automatic door lock function is activated increases. However, if the anti-theft device 1 has an automatic door lock / unlock function, such a setting is not necessary.

[0056] The anti-theft device 1 according to the embodiment of the present invention may further include a door lock motor control module 40, a central door lock control module 50, a power supply module 70, a CAN transceiver 80, etc. These are merely examples, and some of the modules may be omitted or additional modules may be added.

[0057] The door lock motor control module 40 controls the lock / unlock operation of the vehicle's door lock motor 140, and can be, for example, a relay module that switches the connection / disconnection of the unlock signal line and the lock signal line between the door lock motor 140 and the vehicle ECU 102.

[0058] The central door locking control module 50 controls the locking / unlocking operation of the vehicle's central door locking device 150, and can be arranged, for example, on the unlock signal line and lock signal line between the central door locking device 150 and the vehicle ECU 102, and can be configured to simulate the switch operation of the central door locking device 150.

[0059] By including such door lock control modules (door lock motor control module 40, central door lock control module 50), the main control module 10 can control the door lock control module to automatically lock the vehicle doors when the distance between the wireless communication module 30 and the key terminal 130 becomes greater than the second distance R2. Furthermore, the main control module 10 can control the door lock control module to automatically unlock the vehicle doors when the distance between the wireless communication module 30 and the key terminal 130 becomes within the first distance R1. In other words, a smart entry function (automatic door lock, automatic unlock) using the key terminal 130 can be realized, separate from the genuine smart entry function.

[0060] The power supply module 70 supplies power to the anti-theft device 1 and is connected to a power line extending from a battery in the vehicle.

[0061] The CAN transceiver 80 is similar to a CAN transmitter / receiver module, and is connected to a CAN bus in the vehicle so that information communicated on the CAN bus can be sent to the main control module 10 .

[0062] In an embodiment of the present invention, for example, when Bluetooth is used, the number of key terminals that can be simultaneously connected to the anti-theft device is 1. In this case, the key terminal that is authenticated first is given priority, and other key terminals will not be authenticated (connected) to the anti-theft device until the connection of the key terminal that was authenticated first is disconnected.

[0063] In other words, if one key terminal is located closer than the distance R3, which is the limit of connectability when the switching module is in a disconnected state, and is authenticated first, the switching module will not return to a connected state if another key terminal is at or below the first distance R1.

[0064] When the switching module is in a connected state and a previously authenticated key terminal is present within a first distance R1, the switching module will not become disconnected if another key terminal is further away than a second distance R2.

[0065] When the switching module is connected and an unauthenticated key terminal is present within the first distance R1, if an authenticated key terminal moves further than the second distance R2, the switching module enters a disconnected state. This state is maintained as long as the key terminal is within the first distance R1 and the limiting distance R3. If the key terminal then moves further than the limiting distance R3, the connection between the key terminal and the anti-theft device is severed, and authentication of the unauthenticated key terminal is performed. If the unauthenticated key terminal is still within the first distance R1, the switching module returns to the connected state. In other words, the key terminal that connects the switching module and the key terminal that disconnects the switching module may be the same or different.

[0066] When the switching module is connected and an unauthenticated key terminal is present within the first distance R1, if an authenticated key terminal moves further than the second distance R2, the switching module enters a disconnected state. This state is maintained as long as the key terminal is within the first distance R1 and the limiting distance R3. If the key terminal then moves further than the limiting distance R3, the connection between the key terminal and the anti-theft device is severed, and authentication of the unauthenticated key terminal is performed. If the unauthenticated key terminal is still within the first distance R1, the switching module returns to the connected state. In other words, the key terminal that connects the switching module and the key terminal that disconnects the switching module may be the same or different.

[0067] The operation of the program executed by the anti-theft device 1 when the vehicle system is shut down will be explained below using the flowchart in Fig. 5. This flow does not include re-authentication (system startup) during normal mode, and can be implemented in any suitable combination.

[0068] The wireless communication module 30 starts detecting the key terminal 130 (S201). It is determined whether or not there is a signal from the paired key terminal 130 (S202). If there is a signal from the paired key terminal 130 (Yes in S202), the key terminal 130 is authenticated, and communication between the wireless communication module 30 and the key terminal 130 begins (S203). The authentication method is an example, and may be performed in accordance with each communication standard. If there is no signal from the paired key terminal 130 (No in S202), S201 and S202 are repeated until there is a signal from the paired key terminal 130. Note that the preliminary pairing method may also be performed in accordance with each communication standard.

[0069] When communication between the wireless communication module 30 and the key terminal 130 begins, the main control module 10 measures the distance between the wireless communication module 30 and the key terminal 130, for example, from the strength of the communication between the wireless communication module 30 and the key terminal 130 (S204).

[0070] The main control module 10 determines whether the distance between the wireless communication module 30 and the key terminal 130 is equal to or less than R1 (S205).

[0071] If it is less than R1 (Yes in S205), the main control module 10 determines whether the door is locked (S206), and if it is locked (Yes in S206), the main control module 10 controls the operation of the door lock motor control module 40 and the central door lock control module 50 to unlock the door (S207).

[0072] If the door is unlocked (No in S206) or after the door is unlocked, the main control module 10 determines whether the relay of the switching module 20 is disconnected (S208), and if it is disconnected (alert mode) (Yes in S208), the main control module 10 controls the switching module 20 to restore the relay (transition to normal mode) (S209). After No in S208 and after S209, the process returns to S204.

[0073] If the distance is not equal to or less than R1 (No in S205), it is determined whether the distance between the wireless communication module 30 and the key terminal 130 is equal to or less than R2 (S210).

[0074] If it is greater than R2 (No in S210), the main control module 10 determines whether the doors are locked (S211), and if they are unlocked (No in S211), the main control module 10 controls the operation of the door lock motor control module 40 and the central door lock control module 50 to lock the doors (S212). If it is less than R2 (Yes in S210), the process returns to S204.

[0075] If the door is locked (Yes in S211) or after the door is locked, the main control module 10 determines whether the relay of the switching module 20 is disconnected (S213), and if it is connected (normal mode) (No in S213), the main control module 10 controls the switching module 20 to disconnect the relay (transition to alert mode) (S214).

[0076] After No in S213 and after S214, it is determined whether authentication of the key terminal has expired. If it has expired (Yes in S215), the process returns to S201, and if it has not expired (No in S215), the process returns to S204.

[0077] The processes from S204 to S215 are repeatedly performed. These processes may be performed at predetermined intervals or without intervals, but considering power consumption, it is preferable to perform them at predetermined intervals. The predetermined intervals may be set arbitrarily.

[0078] In the embodiment of the present invention, the door unlocking step (S207) and the door locking step (S212) are not essential elements. Furthermore, the order of the unlocking step (S207) and the restoration step (S209), and the order of the door locking step (S212) and the disconnection step (S214) are not limited to the above description, and may be reversed or performed simultaneously. Note that if the door cannot be locked / unlocked due to disconnection, the restoration step is performed before the unlocking step, and the door locking step is performed before the disconnection step.

[0079] Furthermore, the order in which the determination that the distance is less than or equal to R1 (S205) and the determination that the distance is between R1 and R2 (S210) is performed is not limited to the above description, and may be reversed or performed simultaneously.

[0080] The determination of the door lock state (S206, S211) may be performed in any manner, such as through a CAN bus, or based on the history of locking and unlocking processes, a flag for determining the state, or the like.

[0081] Similarly, the state of the relay (S208, S213) may be determined in any manner, and may be determined through a CAN bus or the like, or may be determined from a history of disconnection processing, recovery processing, etc., or a flag for determining the state.

[0082] For example, if the switching module prevents the gear shift position from being changed from park or neutral, the vehicle will not move even if the parking brake is applied and the engine is running when the driver leaves the vehicle, and it is possible to leave the vehicle until the temperature inside the vehicle is at an optimum level, using the air conditioner, etc., while taking necessary measures to keep the vehicle in a shut-off state. When leaving the vehicle under such conditions, higher security is important, and this can be achieved by the anti-theft device of the present invention.

[0083] In this embodiment, the number of key terminals that can be simultaneously connected to the anti-theft device may be two or more. However, to prevent conflicting processes, it is preferable to limit the number of simultaneously connected key terminals to one, or to prioritize the simultaneously connected key terminals so that processing is performed only based on the key terminal with the highest priority. In this case, the priority can be determined in any way, such as giving priority to the key terminal authenticated first, the key terminal authenticated last, the key terminal that is closest, or the key terminal that is farthest from the authenticated key terminals.

[0084] The concepts described herein may be implemented in other forms without departing from their spirit and character. The specific embodiments disclosed should be considered illustrative rather than limiting. Accordingly, the scope of the invention should be determined by the appended claims, rather than by the foregoing description. All changes within the literal language and range of equivalency of the claims are intended to be within their scope. [Explanation of symbols]

[0085] 1 Anti-theft device 10 Main Control Module 20 Switching Module 21 Door button signal line relay module 22 Accelerator pedal signal line relay module 23 Gear signal line relay module 30 Wireless communication module 40 Door Lock Motor Control Module 50 Central door locking control module 70 Power Supply Module 80 CAN transceiver 101 Vehicle ECU 102 Vehicle ECU 120 In-vehicle equipment 121 Door handle button 122 Accelerator sensor 123 gears 130 key terminal 140 Door lock motor 150 Central door locking device 161 Vehicle ECU 162 Vehicle ECU 163 Engine ECU 171 CAN Transmitter / Receiver Module 172 CAN Transmitter / Receiver Module 173 CAN Transmitter / Receiver Module 174 CAN Transmitter / Receiver Module 178 ESCL (Electronic Steering Column Lock) 181 Gear Handle 185 Handle 188 ESCL (Electronic Steering Column Lock) Control Module 190 Authentication Module

Claims

1. An anti-theft device that is detachably connected to an in-vehicle device having a function essential for unlocking and / or driving a vehicle, and is configured to be switchable between an alert mode and a normal mode, a main control module; an authentication module; The main control module Only when authentication is performed by the authentication module, switching from the alert mode to the normal mode is performed; During the alert mode, the vehicle interior device is controlled to be disabled, and when the mode is switched to the normal mode, the vehicle interior device is controlled to be enabled; When the vehicle system is started during the normal mode, a re-authentication process is performed, and if the re-authentication fails, the in-vehicle device is disabled, the vehicle is made inoperable, and / or the system is controlled to be terminated; the anti-theft device is connected to a bus of the vehicle; The in-vehicle device is disabled by the main control module: transmitting a command to disable the in-vehicle device over the bus; Transmitting information via the bus that misleads the ECU into thinking that the in-vehicle device is disabled; An anti-theft device that monitors the bus and blocks all commands that enable in-vehicle devices and commands that are not recognized as normal, rewriting them as commands that do not enable devices, or rewriting them as normal commands.

2. An anti-theft device that is detachably connected to an in-vehicle device having a function essential for unlocking and / or driving a vehicle, and is configured to be switchable between an alert mode and a normal mode, a main control module; an authentication module; a switching module capable of switching a state of a signal line for enabling the in-vehicle device between disconnection and connection; The main control module Only when authentication is performed by the authentication module, switching from the alert mode to the normal mode is performed; During the alert mode, the switching module is controlled to disable the in-vehicle device, and when the mode is switched to the normal mode, the switching module is controlled to enable the in-vehicle device; When the vehicle system is started during the normal mode, a re-authentication process is performed, and if the re-authentication fails, the in-vehicle device is disabled, rendering the vehicle inoperable, and / or the system is controlled to be terminated.

3. The anti-theft device according to claim 1 , further comprising a switching module capable of switching a state of a signal line and / or a power line for enabling the in-vehicle device between disconnection and connection.

4. 2. The anti-theft device of claim 1, wherein the main control module further monitors communications within the bus during the alert mode and blocks and / or disables any commands that are not considered normal.

5. the anti-theft device further comprising a machine learning module; The anti-theft device according to claim 4 , wherein the machine learning module classifies communications within the bus during the normal mode by unsupervised learning, and regards communications outside the classification as the abnormal command.

6. The anti-theft device according to claim 1 , wherein the authentication module includes a wireless communication module for performing authentication between the authentication module and a paired key terminal.

7. 6. The anti-theft device according to claim 1, wherein the authentication module includes an input module for performing authentication by inputting a PIN.

8. the wireless communication module is capable of measuring the distance to the key terminal, The main control module When the distance between the wireless communication module and the key terminal becomes greater than a second distance, the normal mode is switched to the alert mode; 7. The anti-theft device according to claim 6, wherein when the distance between the wireless communication module and the key terminal is within a first distance that is smaller than the second distance, the device is controlled to switch from the alert mode to the normal mode.

9. The anti-theft device further comprises a door lock control module; The main control module When the distance between the wireless communication module and the key terminal becomes greater than the second distance, the door lock control module is controlled to lock the doors of the vehicle.

9. The anti-theft device according to claim 8, wherein when the distance between the wireless communication module and the key terminal is within the first distance, the door lock control module is controlled to unlock the vehicle doors.

10. the authentication module supports a plurality of authentication methods; 6. The anti-theft device according to claim 1, wherein the re-authentication process requires an authentication method different from that used for switching to the normal mode immediately before the re-authentication process.

11. An anti-theft program executed by the anti-theft device according to any one of claims 1 to 5, monitoring activation of the vehicle's systems during the normal mode; requesting re-authentication from the user and / or the paired key terminal when the activation is detected; If the re-authentication fails, controlling the in-vehicle device to be disabled and / or the system to be terminated, and if the re-authentication is successful, controlling the in-vehicle device and the system to be maintained in a normal mode; Anti-theft program.

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