JP2018178651A - On-vehicle equipment remote control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle equipment remote control apparatus capable of improving security.SOLUTION: A portable machine generates a first code C1 on the basis of a first rolling code R1 stored in a first storage unit. Then, the portable machine causes a first transmitting unit to transmit the generated first code to a vehicle. Next, the vehicle can authenticate the portable machine by collating the first code with a second rolling code R2 stored in a second storage unit. Further, the vehicle transmits a challenge code CHG to the portable machine on the basis of the second rolling code. Then, the portable machine generates a reply code on the basis of a predetermined rule or the like for the challenge code and transmits the reply code to the vehicle. Subsequently, the vehicle collates the reply code with the second code C2. In this way, the authentication is performed in duplicate.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to an in-vehicle device remote control device.

  There is known a technology of a smart key system which unlocks or locks a door of a vehicle by wireless communication between the vehicle and a device carried by a user. In the smart key system, there is known a technique for improving security by using data called a so-called rolling code.

  Then, in the smart key system, for example, a relatively large tolerance is set to the device that requests transmission of radio waves. In this way, there is known a technology that can prevent discrimination as an error in collation of rolling codes on the transmission side and the reception side in the smart key system (see, for example, Patent Document 1).

Unexamined-Japanese-Patent No. 11-336394

  However, in the prior art, the rolling code may be leaked and security may not be sufficient.

  Then, this invention aims at provision of the vehicle-mounted apparatus remote control apparatus which can improve security.

According to one aspect, an on-vehicle apparatus remote control device having a vehicle and a portable device to which a first operation for unlocking a door of the vehicle is input,
The portable device is
A first storage unit that stores a first rolling code that is changed when the portable device performs transmission;
A first generation unit configured to generate a first code based on the first rolling code when the first operation is input;
A first transmission unit for transmitting the first code to the vehicle;
The vehicle is
A second storage unit storing a second rolling code;
A first collating unit that authenticates the portable device by collating the first rolling code identified based on the first code and the second rolling code;
When a second operation to unlock the door is input, a challenge code is generated based on the second rolling code and the random number, and a second code indicating a reply result for the challenge code is generated. Department,
And a second transmission unit that transmits the challenge code to the portable device.
The portable device is
A third generation unit configured to generate a reply code for the challenge code based on the challenge code and the first rolling code when the challenge code is transmitted;
And a third transmission unit for transmitting the reply code to the vehicle.
The vehicle is
The mobile communication apparatus further includes a second collating unit that authenticates the portable device by collating the reply code with the second code when the reply code is transmitted.

  First, the portable device generates a first code based on the first rolling code stored by the first storage unit. Then, the portable device transmits the generated first code to the vehicle by the first transmission unit. Next, the vehicle can authenticate the portable device by collating the second code with the second rolling code stored in the second storage unit.

  Further, the vehicle transmits the challenge code to the portable device based on the second rolling code. Then, the portable device generates a reply code to the challenge code based on a predetermined rule or the like, and transmits the reply code to the vehicle. Subsequently, the vehicle collates the reply code with the second code. In this way, the vehicle can authenticate the portable device.

  As described above, when the authentication is performed in duplicate, the on-vehicle apparatus remote control device can improve security as compared with the case where determination is made based on only one authentication. Furthermore, the on-vehicle equipment remote control device can improve security because the rolling code is less likely to be exposed.

  An on-vehicle equipment remote control device capable of improving security can be provided.

FIG. 2 is a block diagram showing an example of the overall configuration and an example of the hardware configuration of the in-vehicle device remote control device according to the present embodiment. It is a timing chart which shows an example of the whole processing by the in-vehicle apparatus remote control device concerning this embodiment.

  Hereinafter, embodiments will be described in detail with reference to the attached drawings.

<Overall Configuration Example and Hardware Configuration Example>
For example, the communication system 100 which is an example of the on-vehicle equipment remote control device has the following overall configuration.

  FIG. 1 is a block diagram showing an example of the overall configuration and an example of the hardware configuration of the in-vehicle device remote control device according to the present embodiment. Hereinafter, as illustrated, an example in which data is transmitted and received by wireless communication between the vehicle 10 and the portable device 20 owned by the user of the vehicle 10 will be described.

  For example, as shown in the figure, the vehicle 10 includes a receiver 1, a first verification unit, a second verification unit, and a verification ECU (Engine Control Unit) 2 which is an example of a second generation unit, a door handle 3, and a body. The hardware configuration includes the ECU 4, the door lock motor 5, and the transmitter 6, which is an example of the second transmission unit. In addition, the vehicle 10 includes a storage device which is an example of a second storage unit.

  The receiver 1 is a device that receives data wirelessly from an external device such as a portable device 20 or the like. For example, the receiver 1 is an antenna, a processing circuit, and the like.

  The verification ECU 2 is an example of an arithmetic device and a control device that perform verification and the like based on a rolling code.

  The door handle 3 is a mechanism for the user to open the door of the vehicle 10. In addition, the door handle 3 has a sensor, a switch, or the like, and receives an operation of unlocking the door from the user.

  The body ECU 4 is an example of an arithmetic device and a control device that perform processing for controlling the door lock motor 5 and the like.

  The door lock motor 5 is an actuator and a mechanism that unlocks or locks the door of the vehicle 10, that is, locks or unlocks the door.

  The portable device 20 is, for example, an example of an input device, an electronic circuit that is an example of a first generation unit, and a third generation unit, a storage device that is an example of a first storage unit, a first transmission unit, and a third transmission unit. It has a transceiver and the like. In addition, the portable device 20 receives an operation of unlocking the door from the user.

  The hardware configuration of each device is not limited to the illustrated configuration. For example, each device may further include a computing device, a storage device, a controller or an interface.

  Further, in the figure, dotted lines mainly indicate wireless transmission and reception of data, and solid lines mainly indicate wired data transmission and reception.

<Example of overall processing>
FIG. 2 is a timing chart showing an example of the overall processing by the on-vehicle apparatus remote control device according to the present embodiment. Hereinafter, the door of the vehicle 10 is assumed to be locked in advance. Then, it is assumed that the user performs an operation of unlocking the door in order to board the vehicle 10.

  At timing TG10, first, the user inputs an operation of unlocking the door, which is an example of the first operation, to the portable device 20. Specifically, when the “unLock” button or the like of the portable device 20 is pressed by the user, an operation to unlock the door is input to the portable device 20. Furthermore, the signal SG20 is a high active signal that is turned "ON" when an operation to unlock the door is input.

  At timing TG11, the portable device 20 generates a remote keyless entry (RKE) code C1 which is an example of a first code based on a rolling code R1 which is an example of a first rolling code. Thus, when the signal SG <b> 20 is turned “ON”, the portable device 20 generates a rolling code R <b> 1. In the illustrated example, the signal SG21 is a signal indicating the rolling code R1.

  At timing TG11, the portable device 20 increments and changes the rolling code R1. In the illustrated example, at timing TG11, the portable device 20 increments the value indicated by the signal SG21 to "+1" the rolling code R1.

  Thus, the rolling code is, for example, data or the like which is counted up each time the device transmits a radio wave and which has a different value for each transmission.

  At timing TG12, the portable device 20 transmits the RKE code C1 to the vehicle 10. In the illustrated example, the signal SG23 indicates a signal transmitted to the vehicle 10. When the signal SG23 is "ON", it indicates that the RKE code C1 is transmitted to the vehicle 10. Further, in the illustrated example, a state in which the signal SG23 is received on the vehicle 10 side is indicated by a signal SG10.

  At timing TG13, the vehicle 10 receives the RKE code C1 transmitted at timing TG12.

  At timing TG14, the vehicle 10 collates the code indicated by the RKE code C1 with the rolling code R2, which is an example of the second rolling code indicated by the signal SG11. In the illustrated example, the signal SG12 is a signal that is turned “ON” when the matching process is performed. Then, if the code indicated by the RKE code C1 matches the rolling code R2 as a result of the collation, the wireless authentication CK1 determines that “the door is unlocked (collation OK)”.

  At timing TG15, the vehicle 10 increments and changes the rolling code R2. In the illustrated example, when it is determined that the door is "unlocked" as a result of the collation, the vehicle 10 increments the value indicated by the signal SG11 and "+1" the rolling code R2 at timing TG15.

  At timing TG20, the user inputs an operation for unlocking the door, which is an example of the second operation, to the vehicle 10. Specifically, when an unlocking operation by the user is detected by an “unLock” sensor or the like included in the door, an operation for unlocking the door is input to the vehicle 10. Furthermore, the signal SG13 is a high active signal that is turned "ON" when an operation to unlock the door is input.

  At timing TG21, the vehicle 10 generates a challenge code CHG. In the illustrated example, the signal SG14 is a signal indicating a challenge code CHG. Furthermore, at timing TG21, the vehicle 10 generates a RES (Response) code RES that has the same content as the reply code sent back by the portable device 20 to the challenge code CHG based on a predetermined rule. In the illustrated example, the signal SG15 is a signal indicating the RES code generated by the vehicle 10.

  The challenge code CHG is data indicating an input, so-called "Challenge". Then, upon receiving the challenge code CHG, the portable device 20 can generate, as a result of a reply to the challenge code CHG, data indicating a so-called “Response” based on a preset rule such as encryption. Next, a reply code indicating “Response” is transmitted from the portable device 20 to the vehicle 10, and the vehicle 10 can authenticate the portable device 20 depending on whether “Response” is as set in the law.

  The challenge code CHG is, for example, data indicating a random number. That is, the challenge code CHG is, for example, data indicating a random number generated by an ECU or the like executing a random number function. Therefore, when “Challenge” indicated by the challenge code CHG is a random number, “Response” that is a reply result to the challenge code CHG is also a random number.

  At timing TG22, the vehicle 10 transmits a challenge code CHG to the portable device 20. The signal SG16 indicates a signal transmitted to the portable device 20, and when the signal SG16 is "ON", indicates that the challenge code CHG is transmitted to the portable device 20. Further, in the illustrated example, a state in which the signal SG16 is received on the side of the portable device 20 is indicated by a signal SG24.

  At timing TG23, the portable device 20 receives the challenge code CHG transmitted at timing TG22.

  At timing TG24, the portable device 20 generates a reply code C2, which is an example of a second code, based on the challenge code CHG and the rolling code R1. The signal SG25 is a signal indicating the reply code C2.

  At timing TG 25, the portable device 20 transmits the reply code C 2 to the vehicle 10. The signal SG25 indicates a signal transmitted to the vehicle 10. When the signal SG25 is "ON", the signal SG26 indicates that the reply code C2 is transmitted to the vehicle 10. Further, in the illustrated example, a state in which the signal SG25 is received on the vehicle 10 side is indicated by a signal SG17.

  At timing TG26, the vehicle 10 receives the reply code C2 transmitted at timing TG25.

  At timing TG27, the vehicle 10 collates the code indicated by the reply code C2 with the RES code RES indicated by the signal SG15. In the illustrated example, the signal SG <b> 18 is a signal that becomes “ON” when the matching process is performed. When the reply code C2 matches the RES code RES as a result of the collation, the smart communication authentication CK2 determines that “the door is unlocked (collation OK)”.

  As described above, the vehicle 10 unlocks the door if it is determined that both the wireless authentication CK1 and the smart communication authentication CK2 “open the door”.

  As described above, the smart communication authentication CK2 is an authentication that continuously uses the rolling code used in the wireless authentication CK1. The communication system 100 can improve security by performing double authentication.

  Further, since the rolling code is continuously used for collation and encryption generation and the like, the rolling code is not exposed as in wireless communication and the like, and secrecy can be easily maintained. Therefore, it is possible to reduce the possibility of receiving tampering, radio interference or interception in wireless communication.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the specific embodiment described. Therefore, various modifications or changes are possible within the scope of the present invention as set forth in the claims.

100 Communication system 10 Vehicle 20 Portable device R1, R2 Rolling code

Claims (1)

An on-vehicle apparatus remote control device comprising: a vehicle; and a portable device to which a first operation for unlocking a door of the vehicle is input.
The portable device is
A first storage unit that stores a first rolling code that is changed when the portable device performs transmission;
A first generation unit configured to generate a first code based on the first rolling code when the first operation is input;
A first transmission unit for transmitting the first code to the vehicle;
The vehicle is
A second storage unit storing a second rolling code;
A first collating unit that authenticates the portable device by collating the first rolling code identified based on the first code and the second rolling code;
When a second operation to unlock the door is input, a challenge code is generated based on the second rolling code and the random number, and a second code indicating a reply result for the challenge code is generated. Department,
And a second transmission unit that transmits the challenge code to the portable device.
The portable device is
A third generation unit configured to generate a reply code for the challenge code based on the challenge code and the first rolling code when the challenge code is transmitted;
And a third transmission unit for transmitting the reply code to the vehicle.
The vehicle is
An on-vehicle apparatus remote control device further comprising: a second collating unit that, when the reply code is transmitted, verifies the reply code and the second code to authenticate the portable device.

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