JP2016138375A - Collation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collation device with high security.SOLUTION: A communication control section 30 includes an IC memory 33 and a CPU memory 34. The IC memory 33 has a plurality of storage blocks A-D for storing data, and an ID code used for collation with an electronic key 20 is stored at least in one of the storage blocks A-D. A control program 35 including information which shows the storage block storing the ID code is stored in the CPU memory 34. The communication control section 30 executes various kinds of control in accordance with the control program 35.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a verification device.

  Conventionally, a collation system disclosed in Patent Document 1 is well known. The in-vehicle collation device that constitutes this system collates wirelessly with the electronic key, and permits the engine to start when the collation is established.

  Such a collation device includes a storage unit for storing ID data common to the electronic key, a demodulated ID data wirelessly transmitted from the electronic key, and the demodulated ID data and storage unit. And a processing unit that performs collation with the ID data stored therein.

  In addition, as shown in Patent Document 1, the processing unit is electrically connected to other in-vehicle devices such as an engine control unit that controls engine start and a door lock device that switches between locking and unlocking the door, Various information is exchanged with these in-vehicle devices. The storage unit stores various types of data necessary for exchange of information with these other in-vehicle devices.

  Usually, the storage unit is divided into a plurality of blocks, and one data is stored for each block. For example, the A block has ID data common to the electronic key used for verification, the B block has data for permitting the engine to start, and the C block has an instruction to switch the door from locking to unlocking. That is data.

JP 2014-207564 A

  Various data stored in the storage unit of the collation device is different for each vehicle. For example, the ID data of the electronic key is stored in the A block, and the ID data is always stored in the same block when viewed in blocks. Therefore, acquisition and rewriting of ID data are easy.

  The present invention has been made in view of such a situation, and an object thereof is to provide a collation apparatus having high security.

  In order to solve the above-mentioned problem, the collation apparatus has a plurality of storage areas in which data is stored, and at least one of the plurality of storage areas has collation data used for collation with a communication target. A first storage unit that is stored; a second storage unit that stores storage region data indicating which of the plurality of storage regions stores the verification data; and the second storage unit A controller that reads out the verification data stored in the first storage unit from the stored storage area data and performs verification of the communication target using the read verification data. Is the gist.

  According to this configuration, even when the verification data is stored in any of the plurality of storage areas, the control unit reads the verification data stored in the second storage unit, thereby verifying the communication target. It can be performed. Further, it is not necessary to store the verification data in a specific storage area. In other words, the verification data storage area can be changed for each product. This makes it difficult for a third party to acquire or rewrite the verification data, thereby increasing the security as a verification device.

The said structure WHEREIN: It is preferable that the said control part makes various data memorize | stored in the said 1st memory | storage part interlock | cooperate with the said memory | storage area data.
According to this configuration, it is possible to change the storage area of the verification data before and after the change only by changing the storage area data, so that the security as the verification apparatus is improved.

In the above configuration, the storage area data is preferably stored in the second storage unit as a control program of the control unit.
According to this configuration, since the storage area data is a control program, program analysis is required to obtain or rewrite the verification data. Therefore, security as a verification device is enhanced.

  The collation device of the present invention has high security of stored data.

The block diagram which shows schematic structure of an electronic key system. (A) is a block diagram showing a communication control unit of a lot, (b) is a block diagram showing a communication control unit of a lot different from (a), (c) is a lot of a lot different from (a) and (b) The block diagram which shows a communication control part.

Hereinafter, an embodiment of a collation apparatus embodied in an electronic key system will be described with reference to the drawings.
As shown in FIG. 1, the electronic key system 1 performs various vehicle controls through wireless communication between the vehicle 10 and the electronic key 20.

<Electronic key>
The electronic key 20 includes an electronic key control unit 21, an LF reception unit 22, and a UHF transmission unit 23. Among these, each part except the electronic key control part 21 is electrically connected to the electronic key control part 21, respectively, and is comprehensively controlled by the electronic key control part 21. Each unit of the electronic key 20 is driven by consuming driving power supplied from a battery (not shown).

The LF receiver 22 receives a radio signal in the LF (Low Frequency) band and demodulates the received signal into an electrical signal.
The UHF transmission unit 23 modulates an electrical signal into a UHF (Ultra Hi Frequency) band and transmits the modulated radio signal.

An ID code common to the vehicle 10 is stored in the memory 21 a of the electronic key control unit 21.
When the electronic key control unit 21 receives a later-described request signal through the LF receiving unit 22, the electronic key control unit 21 generates a response signal including the ID code stored in the memory 21a. The generated response signal is modulated by the UHF transmitter 23 and then wirelessly transmitted.

<Vehicle>
As shown in FIG. 1, the vehicle 10 includes a communication control unit 30, an engine control unit 40, and a body control unit 50. These control units 30, 40, 50 can communicate with each other via the CAN 11.

  The communication control unit 30 is electrically connected to an LF transmission unit 31 and a UHF reception unit 32, and the LF transmission unit 31 and the UHF reception unit 32 are comprehensively controlled by the communication control unit 30. .

The LF transmission unit 31 modulates the electrical signal generated by the communication control unit 30 into an LF band radio signal and transmits the modulated radio signal toward a communication area set around the vehicle.
The UHF receiver 32 receives a UHF band radio signal and demodulates the received signal into an electrical signal.

  The communication control unit 30 is an Electronic Control Unit (hereinafter referred to as ECU), and has a Central Processing Unit (hereinafter referred to as CPU) and an integrated circuit (hereinafter referred to as IC).

  The IC memory 33 has storage blocks A, B, C, and D. Each of these storage blocks A to D is assigned and stored with various types of usage data such as an ID code, an engine ID, and a CAN ID common to the electronic key 20. Which of the storage blocks A to D is assigned to which use data is determined by a control program 35 stored in a CPU memory 34 described below. The IC memory 33 corresponds to the first storage unit, the storage blocks A to D correspond to the storage area, and the ID code corresponds to the verification data.

  The CPU memory 34 stores a control program 35 necessary for control of the communication control unit 30 including ID verification with the electronic key 20. In the control program 35, information indicating in which storage blocks A to D of the IC memory 33 each type of usage data such as an ID code common to the electronic key 20, an engine ID, and a CANID is stored in a computer. It is written as a program. For example, as shown in FIGS. 1 and 2A, when the control program 35 is the program ProA, the storage block A has an ID code, the storage block B has an engine ID, and the storage block C has a CANID. Are stored, and the storage block D is blank (empty area). As shown in FIG. 2B, when the control program 35 is the program ProB, the storage block B stores an ID code, the storage block C stores an engine ID, and the storage block D stores a CANID. The storage block A is blank (empty area). As shown in FIG. 2C, when the control program 35 is the program ProC, the storage block C stores an ID code, the storage block D stores an engine ID, and the storage block A stores a CAN ID. The storage block B is blank (empty area). The control program 35 is set differently for each lot (product unit). The CPU memory 34 corresponds to the second storage unit, and the control program 35 corresponds to the storage area data.

  The communication control unit 30 performs ID verification with the electronic key 20 along the control program 35. That is, the communication control unit 30 periodically generates a request signal including information requesting transmission of an ID code. The request signal is modulated by the LF transmitter 31 and wirelessly transmitted.

  When the communication control unit 30 receives a response signal as a response to the request signal through the UHF receiving unit 32, the communication control unit 30 collates the ID code included in the response signal with the ID code stored in the IC memory 33. If the ID verification is established, the communication control unit 30 outputs a verification establishment signal indicating that the ID verification is established to the CAN 11.

  The communication control unit 30 can be connected to a dedicated external device, and various types of use data can be rewritten and the control program 35 can be transmitted via the external device. When various types of usage data are input from the external device, the communication control unit 30 writes the input usage data in the corresponding storage block in accordance with the control program 35. Further, when the control program 35 is rewritten, various use data stored in the storage blocks A to D are rewritten according to the rewritten control program. The communication control unit 30 corresponds to a verification device.

  The engine control unit 40 is connected to an engine 41 that acts as a driving source for traveling and an engine switch 42, and the engine 41 is comprehensively controlled by the engine control unit 40. The engine control unit 40 starts the engine 41 when the engine switch 42 is operated in a state where the engine 41 is stopped and a collation establishment signal is recognized. And the engine control part 40 outputs the normal start signal which shows that the engine 41 was started normally to CAN11.

  Further, the engine control unit 40 stops the engine 41 when the engine switch 42 is operated while the engine 41 is driven. Then, the engine control unit 40 outputs a stop signal indicating that the engine 41 has been stopped to the CAN 11.

  A door switch 51 provided on the vehicle door and a door lock device 52 that switches between locking and unlocking the vehicle door are electrically connected to the body control unit 50, and the door lock device 52 is connected to the body control unit 50. Controlled by. The body control unit 50 switches between locking and unlocking the vehicle door when the door switch 51 is operated in a state where the verification establishment signal is recognized. In addition, the body control unit 50 outputs a door state signal indicating the locked state and the unlocked state of the door to the CAN 11.

<Action>
Next, an operation when the communication control unit 30 of this example is employed will be described.
As shown in FIGS. 2A to 2C, the control program 35 stored in the CPU memory 34 is different for each lot. For this reason, the use data stored in each of the storage blocks A to D of the IC memory 33 differs for each communication control unit 30.

  Therefore, even if a third party tries to acquire or rewrite data stored in the IC memory 33 by any method, it is only necessary to check the data stored in the IC memory 33 for each storage block A. It is unclear whether the usage data stored in .about.D corresponds to any of the ID code, engine ID, or CANID common to the electronic key 20.

  In addition, although it becomes clear from the control program 35 whether the use data stored in each of the storage blocks A to D corresponds to an ID code, an engine ID, or a CAN ID common to the electronic key 20, it is programmed. Analysis of the program is necessary. Therefore, it takes time to acquire or rewrite data stored in the IC memory 33.

Furthermore, since the control program 35 is stored in the CPU memory 34 that is an internal memory of the ECU, it is difficult to obtain the control program 35 itself.
As described above in detail, according to the present embodiment, the following effects can be obtained.

  (1) The control program 35 stored in the CPU memory 34 is different for each lot. Thereby, the use data stored in each of the storage blocks A to D of the IC memory 33 is different for each communication control unit 30. Therefore, even if a third party tries to acquire or rewrite data stored in the IC memory 33 by any method, it is only necessary to check the data stored in the IC memory 33 for each storage block A. It is unclear whether the usage data stored in .about.D corresponds to any of the ID code, engine ID, or CANID common to the electronic key 20. For this reason, since it is difficult for a third party to acquire or rewrite usage data, the security of the communication control unit 30 is high.

  (2) The communication control unit 30 rewrites various usage data stored in the storage blocks A to D according to the control program 35. In this way, by simply rewriting the control program 35, it is possible to change the storage block of each used data before and after the rewriting, so that the security of the communication control unit 30 is further improved.

  (3) Data indicating which of the storage blocks A to D of each IC data 33 is stored in the CPU memory 34 as the control program 35. Therefore, in order for a third party to acquire or rewrite usage data stored in the IC memory 33, the control program 35 needs to be analyzed. That is, since it takes time to acquire or rewrite the usage data by a third party, the security of the communication control unit 30 is further enhanced.

  (4) Since the control program 35 is stored in the CPU memory 34 which is an internal memory, it is difficult for a third party to access. Therefore, the security of the communication control unit 30 is further increased.

In addition, you may change the said embodiment as follows.
In the above embodiment, the case where the IC memory 33 has the four storage blocks A to D has been described, but this is an example. If an IC memory having a plurality of storage blocks is employed, the same effect as in the above embodiment can be obtained. Note that as the number of storage blocks increases, the number of combinations of storage blocks in which each use data is stored increases, and thus the security as the communication control unit 30 is further improved.

  In the above embodiment, the information indicating the combination of the use data stored in each storage block is stored in the CPU memory 34 as the control program 35, but it is not necessarily a program. Even if what is stored in the CPU memory 34 is not a program but information indicating a combination of use data stored in each storage block, only the information stored in the IC memory 33 can be used for the IC. Since it is unknown what the information stored in the memory 33 indicates, the security as the communication control unit 30 is high.

In the above embodiment, the CPU memory 34 in which the control program 35 is stored is an internal memory, but it need not be an internal memory.
In the above embodiment, the usage data stored in the IC memory 33 is an ID code, an engine ID, and a CANID, but the type of data is not limited to these. For example, it may be an ID code of an additional electronic key, a remote ID used for remote communication, a wireless ID used for wireless communication, a lock ID used for operation of the lock device, or the like.

-In above-mentioned embodiment, although the communication control part 30 provided in the vehicle 10 was demonstrated, the object in which the communication control part 30 is provided is not restricted to a vehicle. For example, it may be a house.
In the above embodiment, the object with which the communication control unit 30 communicates is the electronic key 20, but is not limited to the electronic key and may be a smartphone or the like.

DESCRIPTION OF SYMBOLS 1 ... Electronic key system, 10 ... Vehicle, 11 ... CAN, 20 ... Electronic key, 21 ... Electronic key control part, 22 ... LF reception part, 23 ... UHF transmission part, 30 ... Communication control part, 31 ... LF transmission part, 32 ... UHF receiver, 33 ... IC memory, 34 ... CPU memory, 35 ... control program, 40 ... engine controller, 41 ... engine, 42 ... engine switch, 50 ... body controller, 51 ... door switch, 52 ... door Locking device.

Claims (3)

A first storage unit having a plurality of storage areas in which data is stored, and at least one of the plurality of storage areas in which data for verification used for verification with a communication target is stored;
A second storage unit storing storage area data indicating which of the plurality of storage areas stores the data for verification;
The verification data stored in the first storage unit is read from the storage area data stored in the second storage unit, and the communication target is verified using the read verification data. A verification device comprising a control unit for performing the verification. The verification apparatus according to claim 1,
The control unit is a collation device that links various data stored in the first storage unit to the storage area data. In the collation device according to claim 1 or 2,
The said storage area data is a collation apparatus memorize | stored in a said 2nd memory | storage part as a control program of the said control part.