Illegal communication prevention system and illegal communication prevention method

Abstract

The system (12) for preventing illegal communication comprises: a communication machine (13), which is arranged on an operation object (1) operable by a terminal (2) and performs wireless communication with the terminal; a notification unit (26), which is arranged on the terminal and notifies the communication machine of the inherent authentication information (Did) of the operation object; a confirmation unit (28), which confirms whether the group of the terminal and the operation object is a correct group based on the authentication information; and a position determination action unit (27), which performs processing for determining the positional relationship between the terminal and the operation object when the confirmation unit confirms that the group of the terminal and the operation object is a correct group.

Description

Technical Field

[0001] The present invention relates to an illegal communication prevention system and an illegal communication prevention method for preventing illegal establishment of communication. Background Art

[0002] In the past, the following technology is known: UWB (Ultra Wide Band) radio waves are sent and received between devices performing wireless communication, and the distance between the devices is measured based on the propagation time required for sending and receiving the radio waves at this time, so as to determine the appropriateness of the distance between the two (see Patent Document 1, etc.). When this technology is used, even if communication is to be illegally established by using, for example, a repeater, the measured distance becomes above a threshold, so that the communication can be identified as illegal, and communication establishment using illegal communication can be prevented before it occurs.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-91071 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, when UWB communication is performed between devices, there may be other devices that are the object of distance determination. In this case, for example, although a terminal sends UWB radio waves to a device that is grouped with the terminal, sometimes not only the device that is grouped with the terminal but also other devices that are not grouped with the terminal take actions to return UWB radio waves. In this case, radio waves from other devices may interfere with communication.

[0008] An object of the present invention is to provide an illegal communication prevention system and an illegal communication prevention method that can suppress useless interference from other communication devices when communication for confirming a positional relationship is performed between a terminal and a communication device.

[0009] Solutions to Solve Problems

[0010] In one embodiment, a system for preventing illegal communications is provided with a communication device capable of performing communications different from the authenticated communications on an operation object that is permitted or has performed an action after wireless authentication is established with a terminal, and the positional relationship of the terminal relative to the operation object is determined through communication between the communication device and the terminal. The system for preventing illegal communications comprises: a notification unit that notifies the operation object of inherent authentication information when the terminal and the communication device communicate; a confirmation unit that confirms whether the group of the terminal and the operation object is a correct group based on the authentication information; and an action unit that performs the determined processing action according to the confirmation result of the confirmation unit.

[0011] In one embodiment of a method for preventing illegal communication, a communication device capable of performing communication different from the authentication communication is provided on an operation object that is permitted or performs an action after wireless authentication is established with a terminal, and the appropriateness of the positional relationship of the terminal relative to the operation object is determined through communication between the communication device and the terminal. The method for preventing illegal communication comprises: a step of notifying the operation object of inherent authentication information when the terminal and the communication device communicate; a step of confirming whether the group of the terminal and the operation object is a correct group based on the authentication information; and a step of performing the determined processing action based on the confirmation result of the authentication information. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of an illegal communication prevention system according to one embodiment.

[0013] Figure 2 This is a schematic diagram showing the arrangement position of the vehicle-mounted communication device.

[0014] Figure 3 : is a flowchart showing the registration procedure of authentication information.

[0015] Figure 4 Detailed description of the process of distance measurement is given in FIG. DETAILED DESCRIPTION

[0016] Below, according to Figure 1 to Figure 4 An embodiment of an illegal communication prevention system and an illegal communication prevention method will be described.

[0017] like Figure 1 As shown, the vehicle 1 is provided with an electronic key system 4 that authenticates the terminal 2 by wireless and permits or executes the action of the vehicle-mounted device 3. The electronic key system 4 in this example is preferably an intelligent verification system that performs ID verification (intelligent verification) by short-range wireless based on the communication from the vehicle 1. The vehicle-mounted device 3 includes, for example, a door lock device for opening and closing the door, an engine of the vehicle 1, etc. The terminal 2 may also be any one of an electronic key that mainly has a key function and a high-performance portable phone that is registered with a key function.

[0018] The electronic key system 4 includes a system device 5 for operating the electronic key system 4 in the vehicle 1. The electronic key ID and the key-specific key used in the smart verification are registered in the system device 5. The system device 5 is provided with a vehicle communication unit 6 for transmitting and receiving various radio waves when the system device 5 communicates with the terminal 2 for ID verification. The radio waves transmitted from the system device 5 to the terminal 2 use the radio waves of the LF (Low Frequency) band, and the radio waves transmitted from the terminal 2 to the system device 5 use the radio waves of the UHF (Ultra High Frequency) band.

[0019] The terminal 2 includes a terminal control unit 7 for controlling the operation of the terminal 2 and a terminal communication unit 8 for transmitting and receiving radio waves. The terminal control unit 7 registers a key ID and a key-specific key unique to the terminal 2. The terminal communication unit 8 includes a receiving unit for receiving radio waves in the terminal 2 and a transmitting unit for transmitting radio waves from the terminal 2.

[0020] When the vehicle 1 is in a parked state, when the terminal 2 receives a radio wave (wake-up signal) transmitted from the outdoor transmission unit (not shown) LF included in the vehicle communication unit 6, and the terminal 2 sends a response back to the vehicle 1 via UHF, the outdoor smart verification starts. In the outdoor smart verification, key ID verification, challenge response authentication using the key's inherent key, etc. are performed. The establishment of the outdoor smart verification becomes a condition for permission or execution of door locking / unlocking. In addition, when the terminal 2 receives a radio wave (wake-up signal) transmitted from the indoor transmission unit (not shown) LF included in the vehicle communication unit 6, and the terminal 2 sends a response back to the vehicle 1 via UHF, the indoor smart verification starts. The indoor smart verification is the same process as the outdoor smart verification. The establishment of the indoor smart verification becomes a condition for permission of the vehicle power switching operation (engine start operation, etc.).

[0021] The vehicle 1 has a function (illegal communication prevention system 12) to improve the security against illegal use of the vehicle 1 based on the distance between the terminal 2 and the vehicle 1 measured by communication different from the authentication communication with the terminal 2. The vehicle 1 is an example of an operation object 11 that can be operated by the terminal 2. In this example, the authenticated terminal 2 is used as a vehicle key to operate the vehicle 1. The illegal communication prevention system 12 is installed in the vehicle 1 to prevent: the terminal 2 located in a remote place is illegally connected to the vehicle 1 using a repeater, etc., and the smart verification transfer is established at a place where the user does not expect.

[0022] The illegal communication prevention system 12 includes a communication device 13 of the vehicle 1 and a wireless unit 14 of the terminal 2 in order to determine the positional relationship between the vehicle 1 and the terminal 2 through communication between the vehicle 1 and the terminal 2. In this example, the distance between the vehicle 1 and the terminal 2 is measured to determine the positional relationship. The communication device 13 and the wireless unit 14 transmit and receive UWB (Ultra Wide Band) radio waves to measure the distance between the two. When the distance measurement radio waves use UWB radio waves, the distance between the communication device 13 and the wireless unit 14 can be measured with high resolution (for example, tens of cm intervals).

[0023] The communication device 13 includes an antenna 15 for transmitting and receiving UWB radio waves and a communication control unit 16 for controlling the operation of the antenna 15. The communication control unit 16 of the communication device 13 writes and stores an identification ID (communication device ID) in a memory or the like as unique ID information of each communication device 13. The communication device 13 is connected to the system device 5 via a wire. The wireless unit 14 also includes an antenna 17 and a communication control unit 18 similarly to the communication device 13. The identification ID of each communication device 13 in communication is written and stored in the communication control unit 18 of the wireless unit 14. The wireless unit 14 is connected to the terminal control unit 7 via a wire.

[0024] like Figure 2 As shown, a plurality of (four in this example) communication devices 13 are provided on the vehicle body 19. The communication devices 13 in this example are arranged at the four corners of the vehicle body 19. In this example, the communication device 13 arranged at the right front of the vehicle body is set as the "first communication device 13a", the communication device 13 arranged at the right rear of the vehicle body is set as the "second communication device 13b", the communication device 13 arranged at the left front of the vehicle body is set as the "third communication device 13c", and the communication device 13 arranged at the left rear of the vehicle body is set as the "fourth communication device 13d".

[0025] In this example, the identification ID of the first communication device 13a is set to "identification ID1", the identification ID of the second communication device 13b is set to "identification ID2", the identification ID of the third communication device 13c is set to "identification ID3", and the identification ID of the fourth communication device 13d is set to "identification ID4". In addition, the wireless unit 14 registers "identification ID1 to ID4" as the identification IDs of the first communication device 13a to the fourth communication device 13d in a memory or the like in order to perform ranging communication with the first communication device 13a to the fourth communication device 13d.

[0026] return Figure 1The illegal communication prevention system 12 includes a measuring unit 22, and the measuring unit 22 measures parameters used when confirming the positional relationship between the communication machine 13 and the wireless unit 14. The measuring unit 22 of this example includes a measuring unit 22a provided in each communication machine 13 and a measuring unit 22b provided in the wireless unit 14. The measuring unit 22a is provided in the communication control unit 16 of the communication machine 13. The measuring unit 22b is provided in the communication control unit 18 of the wireless unit 14. The measuring unit 22 of this example performs ranging communication for sending and receiving UWB radio waves between the communication machine 13 and the wireless unit 14, calculates the propagation time required for the communication at this time, and measures the measurement value Dx based on the distance between the two based on the propagation time, and uses it as a parameter for confirming the mutual positional relationship. The measuring unit 22 performs the communication of sending and receiving UWB radio waves by using a predetermined key communication (encrypted communication). Preferably, the measurement value Dx is a ranging value indicating the distance between the communication machine 13 and the wireless unit 14.

[0027] The illegal communication prevention system 12 includes a distance determination unit 23, and the distance determination unit 23 determines the validity of the positional relationship between the communication machine 13 and the wireless unit 14 based on the measurement value Dx obtained by the measurement unit 22. The distance determination unit 23 is provided in each communication machine 13 (communication control unit 16). The distance determination unit 23 performs the following distance measurement determination: by comparing the measurement value Dx obtained by the measurement unit 22 with a preset threshold value Dk, the validity of the positional relationship between the communication machine 13 and the wireless unit 14 is confirmed. When the measurement value Dx is less than the threshold value Dk, the distance determination unit 23 determines that the positional relationship between the communication machine 13 and the wireless unit 14 is valid, and when the measurement value Dx is greater than the threshold value Dk, the distance determination unit 23 determines that the positional relationship between the communication machine 13 and the wireless unit 14 is invalid.

[0028] However, when there are other vehicles near the vehicle, if the other vehicles are equipped with a communication device 13, when the terminal 2 and the communication device 13 of the vehicle perform ranging communication, the UWB radio waves sent from the terminal 2 may reach the communication device 13 of the other vehicle. In this case, the UWB radio waves returned from the communication device 13 of the other vehicle instead of the communication device 13 of the vehicle may be used for ranging determination, and the correct ranging determination may fail. This example is a countermeasure for this problem.

[0029] In this example, authentication information Did is registered in the communication device 13 and the wireless unit 14. The authentication information Did is used to determine whether the communication device 13 is mounted on the vehicle (vehicle 1) or another vehicle during distance measurement communication. Preferably, the authentication information Did is, for example, a unique ID (vehicle unique ID) registered in the vehicle 1. Preferably, the authentication information Did is registered in both the communication device 13 and the wireless unit 14 using, for example, the electronic key system 4 provided in the vehicle 1.

[0030] The illegal communication prevention system 12 includes a notification unit 26, which notifies the vehicle 1 of the unique authentication information Did when the terminal 2 and the communication device 13 communicate. The notification unit 26 is provided in the wireless unit 14 (communication control unit 18). When the distance measurement communication is performed between the vehicle 1 and the terminal 2, the notification unit 26 notifies the other party (communication device 13) of the authentication information Did.

[0031] The illegal communication prevention system 12 includes a confirmation unit 28, which confirms whether the group of the terminal 2 and the vehicle 1 is a correct group based on the authentication information Did. The confirmation unit 28 is provided in the communication device 13 (communication control unit 16). The confirmation unit 28 confirms whether the communication device 13 is mounted on the vehicle (vehicle 1) or another vehicle based on the authentication information Did. The confirmation unit 28 compares the authentication information Did obtained from the terminal 2 with the authentication information Did registered in the communication device 13, thereby confirming whether the authentication information Did is correct.

[0032] The illegal communication prevention system 12 includes an action unit 27, and the action unit 27 performs a ranging determination processing action based on the confirmation result of the authentication information Did. Specifically, the action unit 27 performs the function as the following position determination action unit: when it is confirmed by the confirmation unit 28 that the group of the terminal 2 and the vehicle 1 is the correct group, the processing of determining the position relationship between the terminal 2 and the vehicle 1 is performed. The action unit 27 is set in the communication machine 13 (communication control unit 16). When the action unit 27 confirms that the authentication information Did is consistent, the communication between the terminal 2 and the communication machine 13, that is, the ranging communication, continues. On the other hand, when the action unit 27 cannot confirm the consistency of the authentication information Did, the communication between the terminal 2 and the communication machine 13, that is, the ranging communication, ends.

[0033] Next, use Figure 3 and Figure 4 The operation and effects of the illegal communication prevention system according to this embodiment will be described.

[0034] Figure 3 101 shows the steps for registering the authentication information Did in the terminal 2 and the communication device 13. First, in step 101, when the system device 5 performs the process of registering the terminal 2 in the system device 5 (terminal registration process), the authentication information Did registered in the vehicle 1 is read from the vehicle body 19, and the authentication information Did is sent to the terminal 2. The terminal registration process is a process in which the electronic key ID and the key-specific key written and stored in the terminal 2 are registered in the system device 5 of the vehicle 1 through, for example, the communication network of the electronic key system 4. During the implementation of the terminal registration process, the authentication information Did is transmitted from, for example, the vehicle communication unit 6 to the terminal 2 by LF, and is thus acquired by the terminal 2.

[0035] In step 102, when the terminal 2 receives the authentication information Did from the system device 5, the terminal 2 writes and stores the authentication information Did in a memory (not shown) of the wireless unit 14. Thus, the authentication information Did is registered in the terminal 2.

[0036] In step 103, when the system device 5 sends the authentication information Did to the terminal 2, it also notifies the authentication information Did to the communication device 13. At this time, when the communication device 13 is connected to the system device 5 via the communication line in the vehicle, the authentication information Did is output from the system device 5 to the communication device 13 via the communication line. Examples of the communication line include LIN (Local Interconnect Network) and CAN (Controller Area Network). The system device 5 outputs the authentication information Did to each communication device 13 installed in the vehicle 1.

[0037] In step 104, when each communication device 13 obtains the authentication information Did from the system device 5, it writes and stores it in a memory (not shown). As a result, the communication device 13 is in a state where the authentication information Did is registered.

[0038] Figure 4 201, when the ranging start request as the ranging start instruction is input, the measuring unit 22b of the wireless unit 14 starts ranging communication as ranging between the vehicle 1 and the terminal 2. Preferably, the ranging start input is input from the vehicle 1 (system device 5) through the smart communication when the vehicle 1 and the terminal 2 perform smart communication. Therefore, it is preferred that the ranging communication and the smart communication are implemented in parallel.

[0039] In step 202, the measuring unit 22b of the wireless unit 14 transmits the UWB ranging signal Sa from the antenna 17 of the wireless unit 14 toward the communicator 13 during ranging communication. In the case of this example, the measuring unit 22b sequentially performs ranging communication for each of the multiple communicators 13 arranged on the vehicle body 19. In this example, for example, ranging communication is performed in the order of the first communicator 13a → the second communicator 13b → the third communicator 13c → the fourth communicator 13d.

[0040] The measuring unit 22b of the wireless unit 14 first transmits a distance measurement signal Sa with the first communication device 13a as the communication partner. At this time, the notification unit 26 notifies the first communication device 13a of the authentication information Did registered in the terminal 2 every time the distance measurement signal Sa is transmitted to the first communication device 13a. Therefore, when the first communication device 13a is the communication partner, the distance measurement signal Sa includes an instruction to indicate the start of the distance measurement communication, the identification ID1 of the first communication device 13a as the communication partner at this time, and the authentication information Did registered in the terminal 2. The distance measurement signal Sa is transmitted after being encrypted by, for example, a key pre-registered between the first communication device 13a and the wireless unit 14.

[0041] When the measuring unit 22a of the first communication device 13a receives the distance measurement signal Sa from the wireless unit 14, it confirms the identification ID1 included in the distance measurement signal Sa, thereby obtaining the distance measurement signal Sa transmitted from the wireless unit 14 at this time. That is, the first communication device 13a that matches the identification ID1 included in the distance measurement signal Sa receives the distance measurement signal Sa transmitted from the wireless unit 14.

[0042] In addition, when the confirmation unit 28 of the first communication device 13a receives the ranging signal Sa from the wireless unit 14, it compares the authentication information Did in the ranging signal Sa with the authentication information Did registered in the first communication device 13a to confirm whether the authentication information Did is correct. When the authentication information Did is sent from the wireless unit 14 of the terminal 2 that is paired with the vehicle 1, the authentication information Did is consistent in the confirmation of the authentication information Did in the first communication device 13a. Therefore, when the authentication information Did is consistent, the operation unit 27 allows the ranging communication to continue.

[0043] On the other hand, when the ranging signal Sa reaches another vehicle 1 that is not in a group with the terminal 2, the judgment of the authentication information Did is not established in the communication device 13 of the vehicle 1. That is, when the vehicle 1 and the terminal 2 are in another combination, the authentication information Did of the terminal 2 is different from the authentication information Did of the communication device 13 of the other vehicle, so the authentication information Did is inconsistent. Therefore, even if the communication device 13 of the other vehicle receives the ranging signal Sa, the ranging communication cannot be continued. In addition, the state in which the ranging communication cannot be continued can also be caused by, for example, the failure of the judgment of the authentication information Did or the inability to decipher any of the authentication information Did due to differences in data formats, etc.

[0044] In step 203, when the measurement unit 22a of the first communication device 13a can confirm the consistency of the authentication information Did included in the ranging signal Sa, as a response to the ranging communication, the same UWB ranging signal Sb is transmitted from the antenna 15 to the UWB. The ranging signal Sb includes at least a ranging response indicating a response to the ranging communication. The ranging signal Sb is transmitted after being encrypted by, for example, a key pre-registered between the first communication device 13a and the wireless unit 14.

[0045] In step 204, when the measuring unit 22b of the wireless unit 14 receives the ranging signal Sb from the first communication device 13a, it transmits ranging data Sc concerning the propagation time required for the round trip of the ranging signals Sa and Sb to the first communication device 13a via UWB communication. The propagation time is determined by checking the timestamp added when the signal is transmitted, for example.

[0046] In step 205, when the distance determination unit 23 of the first communication device 13a receives the distance measurement data Sc from the wireless unit 14, it determines the validity of the measurement value Dx (the distance between the terminal 2 and the first communication device 13a) calculated based on the distance measurement data Sc. The distance determination unit 23 compares the calculated measurement value Dx with the threshold value Dk to confirm whether the distance measurement determination is correct. When the measurement value Dx is less than the threshold value Dk, the distance determination unit 23 sets the distance measurement determination to be established. On the other hand, when the measurement value Dx is greater than the threshold value Dk, the distance measurement determination is set to be invalid. In the case where the distance measurement determination is invalid, regardless of the establishment / non-establishment of the smart verification, the action of the vehicle 1 using the terminal 2 is set to be not permitted (prohibited).

[0047] Next, in step 206, the measuring unit 22b of the wireless unit 14 transmits a distance measurement signal Sa with the second communication device 13b as the communication partner. When the second communication device 13b is used as the communication partner, the distance measurement signal Sa includes an instruction to start distance measurement communication, the identification ID2 of the second communication device 13b as the communication partner at this time, and the authentication information Did registered in the terminal 2. The distance measurement signal Sa is transmitted after being encrypted, for example, by a key pre-registered between the second communication device 13b and the wireless unit 14. The distance measurement signal Sa is received by the second communication device 13b with the same identification ID2.

[0048] In step 207, when the authentication information Did included in the ranging signal Sa is confirmed to be consistent, the measuring unit 22a of the second communication device 13b transmits the same UWB ranging signal Sb from the antenna 15 to the UWB as a response to the ranging communication. The ranging signal Sb is transmitted after being encrypted by, for example, a key pre-registered between the second communication device 13b and the wireless unit 14.

[0049] In step 208, when the measuring unit 22b of the wireless unit 14 receives the ranging signal Sb from the second communication device 13b, the ranging data Sc related to the propagation time required for the round trip of the ranging signals Sa and Sb is sent to the second communication device 13b through UWB communication. In addition, the ranging data Sc is determined by the distance determination unit 23 of the second communication device 13b. When the ranging determination is established, the processing continues. When the ranging determination is not established, the action of the vehicle 1 using the terminal 2 is set to be not permitted (prohibited).

[0050] The aforementioned distance measurement determination is also performed between the wireless unit 14 (terminal 2) and other communication devices 13 (third communication device 13c, fourth communication device 13d) on the vehicle 1 side. In the case of this example, after the distance measurement communication with the first communication device 13a, the distance measurement communication is performed in the order of the second communication device 13b → the third communication device 13c → the fourth communication device 13d. In addition, depending on the position of the terminal 2, there are also communication devices 13 that are affected by the vehicle body 19, the human body, etc. and do not establish distance measurement communication. Therefore, it is also possible to make: when the distance measurement communication is started and the communication is not established within a certain period of time, the communication is forced to end and the action is transferred to other communication devices 13.

[0051] In addition, ranging communication is not limited to being performed after smart communication (smart verification) is performed between the terminal 2 and the system device 5. In other words, ranging communication is not limited to being performed after smart communication (after smart verification is established), but may be performed during smart communication or before smart communication starts.

[0052] As described above, according to this example, when the terminal 2 (wireless unit 14) and the communication device 13 perform communication (ranging communication) for confirming the positional relationship, even if there are other vehicles (communication devices 13) that are not related to the terminal 2 in the surroundings, the communication for confirming the positional relationship is completed only with the communication device 13 provided in the vehicle that is grouped with the terminal 2, based on the authentication information Did of the vehicle 1 notified during the communication. Therefore, when the communication (ranging communication) for confirming the positional relationship is performed between the terminal 2 and the communication device 13, useless interference from other communication devices 13 is less likely to occur.

[0053] The notification unit 26 notifies the other party (communication device 13) of the authentication information Did when the distance measurement communication is performed between the vehicle 1 and the terminal 2. Therefore, in this example, the authentication information Did can be notified to the communication device 13 during the distance measurement communication. Therefore, it is advantageous to shorten the processing time required for communication.

[0054] The authentication information Did is an individual ID given to each vehicle 1. Therefore, by a simple process of checking the individual ID of the vehicle 1, it is possible to determine whether it is a grouped communication device 13.

[0055] The communication device 13 acquires the authentication information Did from the system device 5 that performs authentication in the vehicle 1 that is the operation target 11. Therefore, the communication device 13 can easily acquire the authentication information Did from the system device 5 mounted on the vehicle.

[0056] The vehicle 1 is provided with a plurality of communication devices 13. In addition, ranging communication is performed by each of the plurality of communication devices 13 and the terminal 2. Therefore, the terminal 2 communicates with the plurality of communication devices 13 to determine the validity of the positional relationship, which is advantageous in accurately detecting the position of the terminal 2 relative to the vehicle 1.

[0057] In addition, the present embodiment can be implemented as follows: The present embodiment and the following modified examples can be implemented in combination with each other within the range that there is no technical contradiction.

[0058] The authentication information Did on the terminal 2 side may be written and stored in the memory of the terminal control unit 7, for example.

[0059] The authentication information Did is not limited to being notified to the other party during the distance measurement communication, and may be notified to the other party at a timing different from the distance measurement communication.

[0060] The registration of the authentication information Did is not limited to the method using the communication network of the electronic key system 4, and may be set to a method using, for example, a tool (registration tool). In this case, for example, the tool is connected to the vehicle 1, and the authentication information Did is obtained from the vehicle 1. Then, by connecting the tool to the terminal 2, the authentication information Did is given from the tool to the terminal 2, and the authentication information Did is registered in the terminal 2.

[0061] When the terminal 2 sends a ranging signal Sa to the communication device 13 of another vehicle, the terminal 2 cannot receive the ranging signal Sb of the ranging response even if the ranging signal Sa is sent. Therefore, the terminal 2 may forcibly terminate (stop) the ranging communication when it cannot receive the ranging signal Sb within a certain period of time after sending the ranging signal Sa.

[0062] The authentication information Did on the vehicle 1 side may be registered in various ECUs such as the verification ECU in the vehicle body 19 , for example.

[0063] The distance measurement communication may be a communication in which a UWB radio wave is transmitted from the communication device 13 to the terminal 2 , and the terminal 2 which has received the UWB radio wave returns the same UWB radio wave to the communication device 13 .

[0064] Distance determination (distance determination between the terminal 2 and the communication device 13) may be centrally performed by, for example, one ECU, etc. In this case, each communication device 13 only performs distance measurement and outputs its measured value Dx to other ECUs.

[0065] The ranging communication may be a sequence in which UWB radio waves are communicated only once between the terminal 2 and the communication device 13. For example, in the embodiment, if the ranging determination is performed on the terminal 2 side, the transmission of the ranging data Sc may be omitted.

[0066] The communication device 13 may be connected to the system device 5 by wireless.

[0067] The communication device 13 is not limited to being arranged outside the vehicle, and a communication device arranged inside the vehicle may also be used.

[0068] It is also possible to implement distance measurement communication before smart communication, transmit the authentication information Did of the communication device 13 to the terminal 2, and confirm the authentication information Did on the terminal 2 side.

[0069] The plurality of communication devices 13 may be configured such that a specific one becomes a master communication device and manages the operations of the other slave communication devices. In this case, for example, the master communication device may confirm the authentication information Did.

[0070] The operation unit 27 and the confirmation unit 28 are not limited to being provided in the communication device 13, but may be provided in other places.

[0071] The authentication information Did may be confirmed by the system device 5, for example.

[0072] The authentication of the terminal 2 is not limited to the smart verification, and any method can be used as long as it can confirm whether the terminal 2 is correct.

[0073] The electronic key system 4 is not limited to the smart verification system, and can be changed to other systems. In addition, the frequency of the radio waves and the communication method used in the electronic key system 4 can also be changed to various methods.

[0074] The radio waves used in the distance measurement communication are not limited to the radio waves of UWB, and may be changed to radio waves of other frequencies, such as radio waves of Bluetooth (registered trademark).

[0075] The authentication information Did is not limited to the unique ID of the vehicle 1 , and various information can be used as long as it is information that can identify the vehicle 1 .

[0076] The operation targets of the vehicle 1 are not limited to locking / unlocking of the doors and power switching operation of the vehicle power source.

[0077] The operation object 11 is not limited to the vehicle 1 , and may be other equipment or devices.

[0078] Any one or more of the multiple devices that implement the illegal communication prevention system 12 in the present disclosure (for example, the system device 5, each communication machine 13 (each communication control unit 16), the terminal control unit 7 and / or the wireless unit 14 (communication control unit 18)) can be constructed as a computer system, which includes one or more processors and a non-transitory memory, and the non-transitory memory stores commands that can be executed by the processor and is used to implement various processes (for example, illegal communication prevention processes) according to any of the above-mentioned embodiments and any of the above-mentioned variations. Alternatively, any one or more of the multiple devices included in the illegal communication prevention system 12 can also be composed of dedicated hardware such as a specific application integrated circuit (ASIC).

[0079] The present disclosure includes the following embodiments.

[0080] (Implementation Method 1)

[0081] A system for preventing illegal communication, comprising:

[0082] A communication device, arranged at an operation object operable by the terminal, and wirelessly communicating with the terminal;

[0083] a notification unit, provided in the terminal, for notifying the communication device of the inherent authentication information of the operation object;

[0084] a confirmation unit that confirms whether the group of the terminal and the operation object is a correct group based on the authentication information; and

[0085] The position determination operation unit executes a process of determining the positional relationship between the terminal and the operation object when the confirmation unit confirms that the combination of the terminal and the operation object is a correct combination.

[0086] (Implementation Method 2)

[0087] According to the illegal communication prevention system of the first embodiment, the notification unit notifies the communication device of the authentication information when performing distance measurement communication for measuring the distance between the terminal and the operation object.

[0088] (Implementation 3)

[0089] According to the illegal communication prevention system of embodiment 1 or 2, the communication device is one of a plurality of communication devices provided at the operation object,

[0090] The terminal communicates with each of the communication devices individually by transmitting the communication device ID unique to each of the communication devices together with the authentication information from the notification unit,

[0091] Whenever each of the communication devices communicates with the terminal,

[0092] The confirmation unit confirms whether the group of the terminal and the operation object is a correct group based on the authentication information.

[0093] The position determination operation unit executes a process of determining a positional relationship between the terminal and a corresponding one of the plurality of communication devices when the confirmation unit confirms that the combination of the terminal and the operation target is a correct combination.

[0094] (Implementation 4)

[0095] A computer system comprising:

[0096] one or more processors; and

[0097] a non-transitory memory storing commands executable by the processor and used to implement illegal communication prevention processing,

[0098] The illegal communication prevention process includes:

[0099] Notifying, from the terminal, authentication information inherent to the operation object to a communication device provided at the operation object operable by the terminal and communicating wirelessly with the terminal;

[0100] confirming whether the group of the terminal and the operation object is a correct group based on the authentication information;

[0101] When it is confirmed that the group of the terminal and the operation object is a correct group, a process of determining the positional relationship between the terminal and the operation object is executed.

Claims

1. An illegal communication prevention system, wherein a plurality of communication devices capable of performing communication different from the authenticated communication are provided on an operation object that is permitted or performs an action after wireless authentication is established with a terminal, and a positional relationship of the terminal relative to the operation object is determined through communication between the communication devices and the terminal, the illegal communication prevention system comprising: a notification unit configured to notify a ranging signal when a ranging communication using a key is performed between the terminal and each of the communication devices of the operation object; a confirmation unit that confirms whether the communication is with a party that is a group with itself based on the authentication information included in the ranging signal; and an action unit that performs the determined processing action according to the confirmation result of the confirmation unit, The action unit is composed of: The distance measurement communication is continued when the confirmation result of the confirmation unit confirms that the communication is with the other party in a group with itself, and the distance measurement communication is not continued when the confirmation result of the confirmation unit cannot confirm that the communication is with the other party in a group with itself.

2. A method for preventing illegal communication, wherein a plurality of communication devices capable of performing communication different from the communication for authentication are provided on an operation object that is permitted or performs an action after wireless authentication is established with a terminal, and the appropriateness of the positional relationship of the terminal with respect to the operation object is determined through communication between the communication devices and the terminal, the method for preventing illegal communication comprising: A step of notifying a distance measurement signal during key-based communication between the terminal and each of the communication devices of the operation object; A step of confirming whether the communication is with a party grouped with the self according to the authentication information included in the ranging signal; and the step of performing the determination processing action according to the confirmation result of the ranging signal, The action unit is composed of: The distance measurement communication is continued when the confirmation result of the confirmation unit confirms that the communication is with the other party in a group with itself, and the distance measurement communication is not continued when the confirmation result of the confirmation unit cannot confirm that the communication is with the other party in a group with itself.

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