JP2022162640A - In-vehicle instrument - Google Patents

Abstract

To provide an in-vehicle instrument 100 capable of improving the reliability of location information D1 by preventing the location information D1 from being tampered with.SOLUTION: The in-vehicle instrument 100 includes an in-vehicle device 2, an in-vehicle output unit 3, and a security device 4. The security device 4 includes: a conversion processing unit (GPS processing unit) in which signals acquired by a signal acquisition unit 22 are input via an input/output unit 45 and conversion processing is performed to convert the signals into the location information D1; and a tamper prevention processing unit 43 that directly inputs the location information D1 in which the conversion processing unit performs the conversion processing, and performs tamper prevention processing to convert the location information D1 to high-security location information D2. The high-security location information D2 is output to the in-vehicle device 2 via the input/output unit 45.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle-mounted device.

Some vehicles are equipped with an in-vehicle device called a digital tachograph, which is a digital operation recorder (see, for example, Patent Document 1). The vehicle-mounted device records the travel information of the vehicle in which it is mounted, and transmits the travel information to the outside by, for example, wireless communication.

By the way, in Japan, although the number of traffic accident fatalities is gradually decreasing year by year, a considerable number of fatalities still occur. Therefore, as a countermeasure against traffic accidents, it is desirable to mount a vehicle-mounted device that outputs vehicle position information to the outside.

Also, in order to prevent fraud such as theft of cargo by a driver, it is desirable to install an on-board device and use position information output from the on-board device.

Furthermore, in terms of promotion of eco-driving and countermeasures against environmental problems, it is desirable to use location information output from on-board devices for remote monitoring.

JP 2009-116576 A

However, the location information of the vehicle-mounted device is, for example, received and used by the receiving device, but the position information in the state recorded in the receiving device or in the state recorded in equipment external to the receiving device Information is in a state in which it is possible to falsify it intentionally. If there is a possibility that the location information has been falsified, the reliability of the information will be questioned, and it will be difficult to use it as evidence of a traffic accident, for example.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle-mounted device capable of suppressing falsification of position information and improving the reliability of the position information.

In order to solve the above problems, an on-vehicle device according to the present invention includes an on-board device that has a signal acquisition unit that acquires a signal related to the position of a vehicle, and that records running information of the vehicle. a vehicle-mounted output unit for outputting the traveling information recorded by the device to the outside, a plurality of processing units, and only one input/output unit for transmitting and receiving information between the vehicle-mounted device, a security device for ensuring security of the processing unit, wherein the security device receives the signal acquired by the signal acquisition unit through the input/output unit, and converts the signal into position information. and a tampering suppression processing unit that directly receives the location information converted by the conversion processing unit and performs tampering suppression processing that converts the location information into high-security location information. The high-security location information is output to the vehicle-mounted device via the input/output unit, and the vehicle-mounted device output unit outputs the high-security location information to the outside.

Since the vehicle-mounted device according to the present embodiment has the configuration described above, it is possible to improve the reliability of the position information.

FIG. 1 is a block diagram of a transmission/reception system having a vehicle-mounted device according to the first embodiment. FIG. 2 is a table showing an example of location information and high-security location information in the vehicle-mounted device according to the first embodiment. FIG. 3 is a block diagram of a transmitting/receiving system having a vehicle-mounted device according to the second embodiment. FIG. 4 is a table showing an example of location information and high-security location information in the vehicle-mounted device according to the second embodiment.

A form (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. In addition, the components described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the configurations described below can be combined as appropriate. In addition, various omissions, substitutions, or changes in configuration can be made without departing from the gist of the present invention.

[First embodiment]
FIG. 1 is a block diagram of a transmission/reception system 1 having a vehicle-mounted device 100 according to the first embodiment. FIG. 2 is a table showing an example of position information D1 and high-security position information D2 in the vehicle-mounted device 100 according to the first embodiment.

A transmitting/receiving system 1 according to the present embodiment includes a vehicle-mounted device 100 and a receiving device 200, as shown in FIG.

The vehicle-mounted device 100 records driving information of a vehicle mounted thereon, and is, for example, a drive recorder (digital tachograph) including various electronic components. Note that the vehicle-mounted device 100 is not limited to a drive recorder or the like. The vehicle-mounted device 100 may be mounted by being incorporated into the vehicle when the vehicle is manufactured, or may be mounted on the vehicle after the vehicle is manufactured. One vehicle-mounted device 100 is mounted in each vehicle. That is, the vehicle-mounted device 100 is mounted on each of a plurality of vehicles.

The vehicle-mounted device 100 includes a vehicle-mounted device 2 , a vehicle-mounted device output unit 3 , and a security device 4 .

The vehicle-mounted device 2 is a part that exhibits the basic functions of a drive recorder, acquires various driving information while the vehicle is running, and records it as driving information.

The onboard device 2 includes an onboard device control unit 21 , a signal acquisition unit 22 , a vehicle signal I/F unit (interface unit) 23 , a CAN conversion unit 24 , and an onboard device memory 25 . In the vehicle-mounted device 100, the vehicle-mounted device ID (vehicle-mounted device identification number) and the type of vehicle to be mounted are registered in advance. 25 is recorded.

The vehicle-mounted device control section 21 comprehensively controls each section of the vehicle-mounted device 100 according to the programs and data stored in the vehicle-mounted device memory 25 .

The signal acquisition unit 22 is a GPS antenna and acquires a signal relating to the position and time of the vehicle.

The vehicle signal I/F unit 23 connects various parts or sensors such as a vehicle ECU, a brake ECU, an acceleration sensor, a winker, and an ignition switch (not shown) to the vehicle-mounted device control unit 21 . The vehicle signal I/F unit 23 processes vehicle travel information acquired by various parts and sensors, and transmits the processed travel information to the vehicle-mounted device control unit 21 .

The CAN conversion unit 24 connects the other device 24a mounted on the vehicle and the onboard device control unit 21, and converts signals transmitted and received between the other device 24a and the onboard device control unit 21 into a communication protocol for CAN. Convert. Then, the CAN converter 24 converts the running signal transmitted from the other device 24a into running information, transmits the converted running information to the vehicle-mounted memory 25, and the vehicle-mounted memory 25 records the running information.

The traveling information in the vehicle-mounted device 100 according to the present embodiment includes, for example, that the brake is turned on, that the accelerator is turned on, that the traveling speed of the vehicle exceeds a predetermined speed, and the like.

The vehicle-mounted device memory 25 records various kinds of information such as various data, programs, and detection results of each sensor necessary for operating the vehicle-mounted device 2 .

The vehicle-mounted device output unit 3 outputs the travel information recorded by the vehicle-mounted device 2 to the outside. More specifically, the vehicle-mounted device output unit 3 transmits the traveling information recorded by the vehicle-mounted device 2 to the receiving device 200 via the transmission antenna 3a, for example. Further, the vehicle-mounted device output unit 3 uses the vehicle-mounted device control unit 21 to output high-security position information D2, which will be described later, to the outside. More specifically, the vehicle-mounted device output unit 3, for example, sends the high-security position information D2 subjected to falsification suppression processing by the falsification suppression processing unit 43 to the receiving device 200 via the transmission antenna 3a to the outside. Send to

The security device 4 has a plurality of processing units and ensures security of the processing units. The security device 4 is formed as a single chip by integrally molding a plurality of processing units, for example. Such a security device 4 has an activation unit 41 , a GPS processing unit 42 , a tampering suppression processing unit 43 , a security memory 44 and an input/output unit 45 .

The activation unit 41 has a function of activating each unit of the vehicle-mounted device 100 when the vehicle-mounted device 100 is powered on.

The GPS processing unit (conversion processing unit) 42 receives the signal acquired by the signal acquisition unit 22 via the input/output unit 45 and performs conversion processing to convert the signal into position information D1. The position information D1 is composed of, for example, latitude, longitude, and time, as shown in FIG.

The tampering suppression processing unit 43 directly receives the location information D1 converted by the GPS processing unit 42, and performs tampering suppression processing for converting the location information D1 into the high-security location information D2. The tampering suppression processing unit 43 according to the present embodiment converts the position information D1 into high-security position information D2 by adding an electronic signature (indicated by a ☆-shaped mark indicated by symbol D3 in FIG. 2) to the position information D1. Perform falsification suppression processing.

An electronic signature certifies that an electronic document is authentic and has not been tampered with. An electronic signature is, for example, an "encrypted code" in which a "code" determined based on a predetermined rule is formed, and the "code" is encrypted by performing encryption processing with a predetermined encryption key. , and the "encryption code" is added to the position information D1. Then, the position information D1 to which the "encryption code", which is an electronic signature, is decrypted based on the above-mentioned encryption key at the time of verification in the receiving device 200, thereby converting the "code". Acquisition processing is performed. Then, if the "code" formed by the tampering suppression processing unit 43 of the security device 4 and the "code" obtained by decryption in the receiving device 200 are not the same, the verifier determines that the location information D1 has been tampered with. If it is the same, it is known that the position information D1 has not been tampered with.

The security memory 44 records various data, programs, and various information necessary for operating the security device 4 .

The input/output unit 45 performs transmission/reception with the vehicle-mounted device 2 , and only one input/output unit 45 is provided in the security device 4 . The security device 4 is connected only to the vehicle-mounted device 2 via the input/output unit 45 . Therefore, the security device 4 cannot be connected to external equipment. As a result, the reliability of the security device 4 can be improved.

Receiving device 200 has receiving section 210 and receiving memory 211 .

The receiving unit 210 receives the travel information transmitted via the transmitting antenna 3a and the high-security location information D2 via the receiving antenna 210a.

The reception memory 211 records the travel information received by the reception unit 210 and the high-security position information D2.

Next, the positional information D1 output process performed by the vehicle-mounted device 100 will be described. First, the vehicle-mounted device control unit 21 acquires a signal regarding the position of the vehicle by the signal acquisition unit 22, which is a GPS antenna.

Next, the vehicle-mounted device control unit 21 inputs the signal acquired by the signal acquisition unit 22 to the security device 4 via the input/output unit 45, and the GPS processing unit 42 converts the above-described signal into position information D1. perform conversion processing.

Next, the vehicle-mounted device control unit 21 directly inputs the location information D1 converted by the GPS processing unit 42 to the tampering suppression processing unit 43 inside the security device 4, A tampering prevention process is performed to convert the information D1 into the high-security position information D2.

Finally, the vehicle-mounted device control unit 21 outputs the high-security position information D2 converted by the tampering suppression processing unit 43 from the vehicle-mounted device output unit 3 to the outside. More specifically, the vehicle-mounted device output unit 3 transmits the high-security location information D2 to the receiving device 200 via the transmitting antenna 3a.

Then, the high-security location information D2 transmitted to the receiving device 200 is received by the receiving section 210 and recorded in the receiving memory 211 .

The vehicle-mounted equipment 100 which concerns on this embodiment has the following structures. The security device 4 includes a GPS processing unit (conversion processing unit) 42 that converts the signal acquired by the signal acquisition unit 22 into positional information D1, and the positional information D1 that has been converted by the GPS processing unit 42. and a tampering suppression processing unit 43 that performs tampering suppression processing for converting into the security position information D2. Therefore, according to the vehicle-mounted device 100 according to the present embodiment, the location information D1 is generated inside the security device 4 that cannot be accessed from the outside, and the location information D1 is generated inside the security device 4 at a high security location. It can be converted into information D2. When the information is transmitted from the security device 4 to the outside, it is in a state of being converted into the high-security location information D2, so it is difficult to tamper with the location information D1. As a result, the vehicle-mounted device 100 according to this embodiment can improve the reliability of the position information D1.

The vehicle-mounted equipment 100 which concerns on this embodiment has the following structures. The falsification suppression processing unit 43 performs a process of adding an electronic signature to the location information D1 and converting it into high-security location information D2. Therefore, the vehicle-mounted device 100 according to the present embodiment verifies the electronic signature of the high-security location information D2 to know whether the information has been tampered with. As a result, the vehicle-mounted device 100 according to the present embodiment can suppress falsification of the high-security location information D2, thereby further improving the reliability of the location information D1.

[Second embodiment]
Next, a transmission/reception system 1A according to the second embodiment will be described. The transmitting/receiving system 1A according to the second embodiment differs from the transmitting/receiving system 1 according to the first embodiment in the content of tampering suppression processing performed by the tampering suppression processing unit 43 of the security device 4A. In the following, differences between the transmission/reception system 1A according to the second embodiment and the transmission/reception system 1 according to the first embodiment will be described.

The security device 4 according to this embodiment has an encryption key generation processing unit 46 in addition to the configuration of the security device 4 according to the first embodiment, and the details of the processing performed by the tampering suppression processing unit 43A are as follows. different like

FIG. 3 is a block diagram of a transmission/reception system 1A having a vehicle-mounted device 100A according to the second embodiment. FIG. 4 is a table showing an example of position information D1 and high-security position information D2 in the vehicle-mounted device 100A according to the second embodiment.

The tampering suppression processing unit 43A directly receives the location information D1 converted by the GPS processing unit 42, and performs tampering suppression processing for converting the location information D1 into the high-security location information D2. The tampering suppression processing unit 43A according to the present embodiment performs tampering suppression processing of encrypting the location information D1 and converting it into high-security location information D2.

The encryption key generation processing unit 46 generates an encryption key that can decrypt the information encrypted by the tampering suppression processing unit 43A.

The encryption is performed by the tampering suppression processing unit 43A, for example, by encrypting the position information D1 based on a predetermined rule, thereby converting the high security position information D2 (for example, formed with a predetermined symbol as shown in FIG. 4). information), and the encryption key generation processing unit 46 generates an encryption key corresponding to the encryption. Then, the encryption key is distributed, for example, from the vehicle-mounted device output unit 3 to an organization (for example, a public agency, a specific company, etc.) whose reliability is guaranteed between the vehicle-mounted device manufacturer and the vehicle-mounted device manufacturer. . Then, the organization incorporates the encryption key into the receiving device 200 owned by the organization. In such a state, high-security location information D2, in which location information D1 is encrypted, is decrypted in receiving device 200 using the above-described encryption key, and is converted into intelligible location information D1. Become.

The vehicle-mounted equipment 100 which concerns on this embodiment has the following structures. The tampering suppression processing unit 43 performs a process of encrypting the location information D1 and converting it into high-security location information D2. Therefore, the vehicle-mounted device 100 according to the present embodiment cannot understand the contents of the position information D1 unless the encrypted high-security position information D2 is decrypted and converted into the position information D1. As a result, the vehicle-mounted device 100 according to the present embodiment can suppress falsification of the high-security location information D2, thereby further improving the reliability of the location information D1.

In addition, the vehicle-mounted device 100, 100A according to the present embodiment described above is provided with an imaging unit capable of capturing a moving image of the exterior of the vehicle in the vehicle-mounted device 2, and records the moving image captured by the imaging unit. A moving image memory may be provided. In addition, the vehicle-mounted device 100 includes a sensor capable of measuring the distance between the vehicle and an external object (hereinafter simply referred to as "external object"). When an external object approaches the vehicle, the driver may be warned by sound or light. In this case, the vehicle-mounted device 100 is detected by the sensor beyond a predetermined distance from the vehicle, and when an external object approaches the vehicle, the vehicle-mounted device 100 exceeds the predetermined distance from the vehicle. High security location information D2 corresponding to the location information D1 of the location where the external object approached the vehicle may be associated with the moving image. Since the high-security position information D2 includes the position information D1, the position information D1 can be used to specify the place and time when an external object approaches the vehicle beyond a predetermined distance. can.

Moreover, the vehicle-mounted device output part 3 of the vehicle-mounted device 100, 100A which concerns on embodiment mentioned above demonstrated what directly transmits driving|running|working information to the receiving apparatus 200. FIG. However, the vehicle-mounted device 100, 100A according to the present embodiment is not limited to this. After performing the tampering suppression process for converting to the information D2, the vehicle-mounted device output unit 3 may output the information to the outside. In this manner, the location information D1 is associated with the travel information, and tampering suppression processing is performed to convert them into the high-security location information D2. As a result, according to the vehicle-mounted device 100, 100A according to the present embodiment, when an external object approaches the vehicle beyond a predetermined distance with respect to the vehicle, the vehicle-mounted device 100, 100A is placed in the high security position. The content of the information D2 clarifies the time and position of the external object approaching the vehicle, and the traveling information of the vehicle. Therefore, the evidence can be clarified and reliability can be improved.

Furthermore, the vehicle-mounted device output unit 3 of the vehicle-mounted device 100, 100A according to the present embodiment described above transmits the traveling information recorded by the vehicle-mounted device 2 to the receiving device 200 via the transmitting antenna 3a and the high-security location information. What transmits the information D2 has been described. However, the vehicle-mounted device output unit 3 of the vehicle-mounted device 100, 100A according to the present embodiment is not limited to this, and has an interface unit to which various storage media (for example, SD memory cards) can be physically or mechanically connected. , the travel information and the high-security position information D2 may be output to the storage medium via the interface unit. Further, the vehicle-mounted device output unit 3 of the vehicle-mounted device 100, 100A according to the present embodiment is not limited to them, and may output the travel information and the high-security location information D2 to the external device via USB. good. Furthermore, the vehicle-mounted device output unit 3 of the vehicle-mounted device 100 according to the present embodiment is not limited to them, and transmits driving information to an external device via Bluetooth (registered trademark) communication or Wi-Fi (registered trademark) communication, and , the high-security location information D2 may be output to an external device.

Further, the vehicle-mounted device 100 according to the first embodiment performs processing for converting the location information D1 into high-security location information D2 by adding an electronic signature. 100A has been explained to perform a process of converting the location information D1 into high-security location information D2 by encrypting the location information D1. However, the vehicle-mounted device according to the present embodiment is not limited to these, and performs a process of adding an electronic signature to the location information D1 and encrypting the location information D1 to convert it into high-security location information D2. may

The content of each embodiment and the content of each modification described above can be applied in combination with a part of the content and another part of the content.

2 onboard device 22 signal acquisition unit 3 onboard device output unit 4, 4A security device 42 GPS processing unit (conversion processing unit)
43, 43A falsification suppression processing unit 45 input/output unit 100, 100A vehicle-mounted device D1 location information D2 high-security location information

Claims (4)

An on-vehicle device that has a signal acquisition unit that acquires a signal related to the position of the vehicle and that records running information of the mounted vehicle;
A vehicle-mounted device output unit that outputs the traveling information recorded by the vehicle-mounted device to the outside;
a security device that has a plurality of processing units and only one input/output unit that transmits and receives information to and from the vehicle-mounted device, and that ensures security of the processing unit;
with
The security device is
a conversion processing unit that receives the signal acquired by the signal acquisition unit as input via the input/output unit and performs conversion processing for converting the signal into position information;
a tampering suppression processing unit that directly receives the location information converted by the conversion processing unit and performs tampering suppression processing that converts the location information into high-security location information;
the high-security location information is output to the vehicle-mounted device via the input/output unit;
The vehicle-mounted device output unit outputs the high-security location information to the outside.
An in-vehicle device characterized by: The tampering suppression processing unit
performing a process of converting the location information into high-security location information by adding an electronic signature to the location information;
The vehicle-mounted device according to claim 1. The tampering suppression processing unit
performing a process of converting the location information into high-security location information by encrypting the location information;
The vehicle-mounted device according to claim 1 or 2. The tampering suppression processing unit associates the travel information with the location information, and performs tampering suppression processing for converting the location information associated with the travel information into the high-security location information.
The vehicle-mounted device according to any one of claims 1 to 3.

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