JP6204442B2 - Electronic key registration system - Google Patents

Description

  The present invention relates to an electronic key registration system for registering an electronic key with a communication master to be communicated.

  As is conventionally known, many vehicles are equipped with an electronic key system that performs key verification using an electronic key ID that is wirelessly transmitted from the electronic key. In this type of electronic key system, it is necessary to register the electronic key to be used in the vehicle. In this case, the key ID of the electronic key and the encryption key are used to control the operation of the electronic key system in the vehicle (ECU (Electronic Control Unit) etc.) must be registered in advance. Specific examples of the electronic key registration system are disclosed in Patent Documents 1 to 3, for example.

JP-A-7-61328 JP 2003-148018 A JP 2004-107959 A

  By the way, when registering an electronic key with an ECU, there is a difference in the authentication level required for key registration, for example, when registering an electronic key with an arbitrary ECU or when registering an electronic key with a specific ECU. . Therefore, there has been a development need for an electronic key registration system that can take an optimal registration mode according to the authentication level of the registration function.

  An object of the present invention is to provide an electronic key registration system capable of realizing optimum security for key registration.

  The electronic key registration system that solves the above problem transmits a registration code to be used at the time of key registration from the electronic key to the communication master. The communication master uses the registration code to determine key information, and the key information is transmitted to the communication master. By registering in the master, the electronic key is registered in the communication master, and a plurality of the registration codes provided according to the positioning of the communication master as a key registration destination, and the electronic key Based on a plurality of the registration codes, the level determination unit for determining the security level of the key registration when registering to the communication master, and the communication master having a different key registration security level according to the positioning of the communication master, A registration execution unit that executes registration of the electronic key.

  According to this configuration, when performing key registration for registering the electronic key with the communication master, key registration is performed using an appropriate registration code in accordance with the security level required for key registration. As a result, problems such as excessive security setting and insufficient security are not caused. Therefore, optimal security for key registration can be realized.

  In the electronic key registration system, the registration code is at least one of a key information generation code that is a source of the key information and a check code that is used to check whether the key information may be generated. It is preferable that the key information generating code is included. According to this configuration, the key registration can be performed in an appropriate manner using the key information generation code and the check code.

  In the electronic key registration system, the positioning of the communication master preferably means that any electronic key can be registered or only a specific electronic key can be registered. According to this configuration, it is possible to execute key registration at an optimum security level each time an electronic key is registered with an arbitrary communication master or when an electronic key is registered with a specific communication master.

  In the electronic key registration system, key registration includes online registration for registering the electronic key with the communication master through network communication and offline registration for registering the electronic key with the communication master without going through the network communication. The level determination unit preferably determines the security level of key registration based on whether the registration is online or offline. This configuration is advantageous in ensuring optimal security for key registration in each of online registration and offline registration.

  In the electronic key registration system, in the offline registration, the first registration code is obtained from an offline electronic key having a first registration code provided as a key information generation code, and the key is obtained from the first registration code. By creating information, key registration of the offline electronic key is performed. In the online registration, the second registration code is obtained from the online electronic key provided with the second registration code provided as the key information generation code. And registering the key information of the online electronic key by creating the key information from the second registration code, and the offline electronic key includes both the first registration code and the second registration code. By providing, it is preferable that even the online registration can be registered in the communication master. . According to this configuration, since the offline electronic key can be registered in the communication master even by online registration, the convenience of key registration can be ensured.

In the electronic key registration system, the registration code includes a key information generation code that is a source of the key information, and a check code that is used to confirm whether the key information may be generated. Yes, the key registration includes online registration in which the electronic key is registered in the communication master through network communication, and offline registration in which the electronic key is registered in the communication master without going through the network communication, and the level determination unit Determines the security level of key registration according to whether it is online registration or offline registration. In the online registration, the online registration key is provided with a second registration code provided as a key information generation code. Obtain the second registration code and create the key information from the second registration code To register the online electronic key, and in the offline registration, the offline registration includes a first registration code provided as a check code and a second registration code provided as the key information generation code. By obtaining the first registration code and the second registration code from the electronic key, creating the key information from the second registration code, and confirming whether the key registration is correct by using the first registration code The key registration of the off-line electronic key is preferably performed. According to this configuration, the key registration can be performed in an appropriate manner using the key information generation code and the check code. In addition, in each of online registration and offline registration, it is advantageous to ensure optimal security of key registration. In addition, during offline registration, it is advantageous to ensure the security of key registration because the key registration is determined using one of the first registration code and the second registration code.

  In the electronic key registration system, in the online registration, the first registration code and the second registration code are obtained from an online electronic key provided with a first registration code and a second registration code provided as a key information generation code. And registering the online electronic key by creating the key information using both the first registration code and the second registration code. In the offline registration, the key information generation code and Obtaining the first registration code and the second registration code from the offline electronic key including the first registration code serving as both the check code and the second registration code provided as the key information generation code; The key information is created using both the first registration code and the second registration code, and the first registration code is By confirming the correctness of the key registration you are, it is preferable to perform the key registration of the offline electronic key. According to this configuration, at the time of key registration, the first registration code of the first registration and the second registration code is used to determine whether or not key registration is possible, which is advantageous for ensuring the security of key registration. .

  According to the present invention, optimal security for key registration can be realized.

The block diagram of the electronic key registration system of 1st Embodiment. Overview of online registration. Overview of offline registration. FIG. 3 is a schematic diagram when an offline electronic key is registered online in a vehicle. Schematic of service specifications for additional registration (online registration). Schematic of service specifications for additional registration (offline registration). The block diagram of the electronic key registration system of 2nd Embodiment. The block diagram of the online registration of an electronic key registration system in 3rd Embodiment. The block diagram of the offline registration of an electronic key registration system.

(First embodiment)
Hereinafter, a first embodiment of an electronic key registration system will be described with reference to FIGS.
[Electronic key system]
As shown in FIG. 1, the vehicle 1 includes an electronic key system 3 that performs validity of the electronic key 2 by wireless communication. The electronic key system 3 is a key system using, for example, near-field wireless communication (communication distance: several to several tens of centimeters) with a very narrow communication range. Near-field wireless communication includes, for example, RFID (Radio Frequency Identification) and NFC (Near field communication). Hereinafter, ID verification of near-field wireless communication is referred to as “immobilizer verification”, and the communication is referred to as “immobilizer communication”.

  The vehicle 1 includes a verification ECU 4 that authenticates the electronic key 2, a body ECU 5 that manages the power source of the on-vehicle electrical components, and an engine ECU 6 that controls the engine 7. These ECUs are connected through a communication line 1a in the vehicle. The communication line 1a is composed of, for example, a CAN (Controller Area Network) or a LIN (Local Interconnect Network). In the memory 9 of the verification ECU 4, an electronic key ID used for ID verification of near-field wireless communication and an encryption key used for challenge response authentication performed at the time of ID verification are written and stored. A plurality of electronic key IDs and encryption keys can be registered according to the number of keys registered in the vehicle 1. The vehicle 1 includes a communication antenna 10 that can transmit and receive radio waves for near-field wireless communication. The communication antenna 10 is connected to the verification ECU 4 and is disposed, for example, in a driver's seat in the vehicle. The communication antenna 10 can transmit and receive radio waves in an LF (Low Frequency) band, for example.

  The electronic key 2 includes a key control unit 11 that controls the operation of the electronic key 2 and a communication antenna 12 that can transmit and receive radio waves of near-field wireless communication. An electronic key ID and an encryption key are written and stored in the memory 13 of the key control unit 11. The communication antenna 12 can transmit and receive LF radio waves.

  When the user gets in, the verification ECU 4 transmits the driving radio wave Svc from the communication antenna 10 by LF. The drive radio wave Svc includes a non-modulated wave serving as a power source for the electronic key 2 and a challenge code whose value is switched every time communication is performed. When the electronic key 2 is held over the communication antenna 10 and the drive radio wave Svc is received by the communication antenna 12, the electronic key 2 operates using the drive radio wave Svc as a power source and returns a transponder signal Str as LF. The transponder signal Str includes an electronic key ID registered in the electronic key 2 and a response code generated by passing the challenge code received from the vehicle 1 through its encryption key.

  When the verification ECU 4 receives the transponder signal Str transmitted from the electronic key 2 by the communication antenna 10, the verification ECU 4 performs challenge response authentication by comparing the response code in the transponder signal Str with the response code calculated in the same manner. Do. The verification ECU 4 also executes electronic key ID authentication by comparing the electronic key ID in the transponder signal Str with the electronic key ID registered in itself. When the verification ECU 4 confirms that both authentications are established, the verification ECU 4 establishes immobilizer verification, and permits the power switch operation (engine start operation) by the engine switch 8.

[Electronic key registration system]
As shown in FIG. 1, the vehicle 1 includes an electronic key registration system 15 used when registering an electronic key 2 in a communication master 14 (an example is a verification ECU 4, the same applies hereinafter). The electronic key registration system 15 transmits the registration code C in which the key information 16 is encrypted from the electronic key 2 to the communication master 14 (an example is a verification ECU 4; the same applies hereinafter), and decrypts the registration code C in the communication master 14. By registering this in the communication master 14, the electronic key 2 is registered in the communication master 14. The key information 16 is preferably, for example, an electronic key ID or an encryption key.

  The electronic key registration system 15 includes a plurality of registration codes C provided in accordance with the positioning of the communication master 14 that is the key registration destination, and performs key registration based on these registration codes C. The registration code C in this example is a key information generation code that is the basis of the key information 16. Two registration codes C1 and C2 are prepared as the registration code C in this example according to the security level of key registration (registration command). In the case of this example, both the first registration code C1 and the second registration code C2 are key information generation codes.

  Since the first registration code C1 is a code that can register the electronic key 2 to be registered only in a specific communication master 14, it is used in a registration environment with a low security level. That is, since the security level is secured by limiting the communication master 14 (ECU) that can be used, the first registration code C1 is used in a registration environment with a low security level. The second registration code C2 is a code that can register the electronic key 2 to be registered in the arbitrary communication master 14, and is therefore used in a registration environment with a high security level. That is, since the communication master 14 (ECU) that can be used is not limited, the second registration code C2 is used in a high security level registration environment. Thus, the positioning of the communication master 14 means that any electronic key 2 can be registered, or only a specific electronic key 2 can be registered.

  In this example, the key registration includes “online registration” and “offline registration”. Online registration refers to a registration environment in which key registration is performed using network communication in an environment where network communication is possible. Offline registration refers to a registration environment where key registration is performed without using network communication in an environment where network communication is not possible.

  The electronic key registration system 15 includes a level determination unit 17 that determines a security level of key registration when registering the electronic key 2 in the communication master 14. The level determination unit 17 is provided in the verification ECU 4, for example. For example, the level determination unit 17 determines the security level of key registration based on a “registration command” input from the registration tool 18. The registration command is a notification for instructing the communication master 14 what kind of registration the key registration to be executed is. For example, when an “online registration command” is input from the registration tool 18, the level determination unit 17 determines that the security level of key registration is high. For example, when an “offline registration command” is input from the registration tool 18, the level determination unit 17 determines that the security level of key registration is low.

  The electronic key registration system 15 includes a registration execution unit 22 that executes key registration based on the determination result of the level determination unit 17. The registration execution unit 22 is provided in the verification ECU 4, for example. The registration execution unit 22 executes registration of the electronic key 2 by using a plurality of registration codes C for each communication master 14 having different key registration security levels according to the positioning of the communication master 14.

Next, the operation of the electronic key registration system 15 will be described with reference to FIGS.
[Online registration]
FIG. 2 illustrates an outline of online registration operation. Online registration refers to registration that requires authentication through the center 27. For example, the dealer 21a or the like in an environment capable of network communication includes an ECU 25 manufactured at the ECU manufacturing factory 23 and an online electronic key 2a in which the second registration code “C2-β” is written and stored. And Further, the ECU 25 in the figure is an ECU in which the key registration with the second registration code “C2-α” has been completed, but of course, it may be an ECU in which this key registration has not been completed.

  When the online electronic key 2a is registered in the ECU 25 by online registration using the dealer 21a or the like, the registration electronic tool 18 can be used and the online electronic key 2a can be registered in the ECU 25 through the center 27. In this case, a registration command (online registration command) is input from the registration tool 18 to the ECU 25 to start online registration. At this time, the center 27 confirms the legitimacy of the ECU 25 that is now registered (center authentication), and permits key registration if authentication is established. The registration tool 18 used for online registration is preferably a market tool installed in the dealer 21a or the like.

  By the way, since online registration is registration that imposes center authentication, it can be said that the security level of key registration is high. Therefore, in the case of online registration, key registration is executed using the second registration code “C2-β”. That is, the second registration code “C2-β” is a code that can register an arbitrary key to an arbitrary ECU, and is therefore used in a registration environment in which a high security level is ensured.

[Offline registration]
FIG. 3 shows an outline of the offline registration operation. Offline registration refers to key registration that does not impose authentication through the center 27. The key manufacturing factory 26 manufactures an offline electronic key 2b that can be used for offline registration. The off-line electronic key 2b is an order key produced upon receipt of a key order from the ECU 25, and stores not only the first registration code C1 but also the second registration code “C2-γ”.

  Further, for example, the dealer 21b in an environment where network communication is impossible has an ECU 25 manufactured at the ECU manufacturing factory 23 and an off-line electronic key 2b manufactured by ordering at the key manufacturing factory 26. The ECU 25 used for offline registration is positioned as a “specific ECU” that can register only a certain electronic key 2. The ECU 25 is an ECU that has been registered with the second registration code “C2-α”. Of course, the ECU 25 may be an ECU that has not been registered with the key.

  When the offline electronic key 2b is registered in the ECU 25 by offline registration using the dealer 21b or the like, the offline electronic key 2b is registered using the registration tool 18. In this case, a registration command (offline registration command) is input from the registration tool 18 to the ECU 25 to start offline registration, and the offline electronic key is used by using the first registration code C1 registered in the offline electronic key 2b. 2b is registered in the ECU 25. The registration tool 18 used for offline registration is preferably a market tool installed in the dealer 21b or the like.

  By the way, since offline registration is registration that does not impose center authentication or the like, it can be said that the security level of key registration is low. Therefore, in the case of offline registration, key registration is executed using the first registration code C1. That is, since the first registration code C1 is a code that can be registered only in a specific ECU, it is used in a registration environment in which a low security level is ensured. This is because the first registration code C1 is difficult to obtain for a third party or the like because security is ensured by limiting the available ECUs. The low security level means offline registration (key registration not via network communication).

  As shown in FIG. 4, since both the first registration code C1 and the second registration code “C2-γ” are written in the offline electronic key 2b of this example, not only offline registration but also online registration is performed. Can also be registered in the ECU 25. As a result, even if there is only an offline electronic key 2b at hand, it is possible to register it in the ECU 25 by online registration even in an environment where online registration is possible.

[Additional registration (online registration)]
FIG. 5 shows an outline of service specifications for additional registration (online registration). The situation where the service of additional registration (online registration) is performed is the addition of an electronic key 2 that can be used in the market where the center can be connected.

  In the additional registration (online registration), the key manufacturing factory 26 manufactures the online electronic key 2a and delivers it to the dealer 21a. When the dealer 21a accepts an owner addition registration request which is a request for key addition registration from the user, the dealer 21a registers the electronic key 2a for online delivery or delivered from the key manufacturing factory 26 in the ECU 25 using the registration tool 18, The vehicle 1 equipped with the in-vehicle ECU is delivered to the user. At this time, the registration tool 18 performs key registration while performing center authentication.

  In the registration procedure of additional registration (online registration), an additional online registration command is input from the registration tool 18 to the ECU 25, and the ECU 25 (registration execution unit 22) checks whether or not it has a registered electronic key. To do. The confirmation of the presence or absence of the registered electronic key is preferably a process for confirming whether or not the encryption key has been written in the memory 9 of the ECU 25, for example.

[Additional registration (offline registration)]
FIG. 6 shows an outline of service specifications for additional registration (offline registration). The situation where the additional registration (offline registration) service is performed is the addition of an available electronic key 2 in a market where the center connection is impossible.

  In the additional registration (offline registration), the dealer 21b reads an ECU-ID (a unique ID of the ECU 25) from the ECU 25 when receiving an owner additional registration request. The dealer 21b issues a purchase order 33 in which the key order is made with the ECU-ID to the key manufacturing factory 26. The key manufacturing factory 26 manufactures the offline electronic key 2b based on the received purchase order 33 and delivers it to the dealer 21b. The dealer 21b registers the offline electronic key 2b delivered from the key manufacturing factory 26 in the ECU 25 using the registration tool 18, and delivers the vehicle 1 equipped with the ECU 25 to the user.

  The registration procedure for additional registration (offline registration) is as follows: an additional offline registration command is input from the registration tool 18 to the ECU 25, and the ECU 25 (registration execution unit 22) checks whether or not it has a registered electronic key. To do. The confirmation of the presence or absence of the registered electronic key is preferably a process of confirming whether or not the encryption key has been written in the memory 9 of the ECU 25 as described above.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Two registration codes C (first registration code C1 and second registration code C2) are prepared in the electronic key 2 and are required for key registration when registering the electronic key 2 in the vehicle 1 (ECU 25). The registration code C to be used is properly used according to the security level. As a result, problems such as excessive security setting and insufficient security are not caused. Therefore, optimal security for key registration can be realized.

  (2) When registering the electronic key 2 in an arbitrary ECU 25 or registering the electronic key 2 in a specific ECU 25, the key registration can be executed with an optimum security level.

  (3) When both the first registration code C1 and the second registration code C2 are written in the electronic key 2 (offline electronic key 2b) and the electronic key 2 is registered in the vehicle 1 by online registration, the first registration code When registering the electronic key 2 in the vehicle 1 by offline registration using C1, the second registration code C2 is used. In this way, the electronic key 2 can be registered in the vehicle 1 not only by offline registration but also by online registration, so the convenience of key registration can be ensured.

  (4) The registration code C is a key information generation code. Therefore, since the key information 16 cannot be created unless the correct registration code C is acquired, it is possible to ensure security against duplication of the key information 16.

  (5) Since the key registration method is switched between online registration and offline registration, it is advantageous to ensure optimal security of key registration in each of online registration and offline registration.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The second embodiment is an example in which the offline registration method described in the first embodiment is changed. Therefore, the same portions as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions are described in detail. In the case of this example, online registration is the same as in the first embodiment, so only offline registration will be described.

  As shown in FIG. 7, in the offline electronic key 2b, the first registration code C1 is provided as a check code used for confirming whether or not the key information 16 (in this example, an encryption key) may be generated. ing. Further, in the off-line electronic key 2b, the second registration code “C2-γ” is provided as a key information generation code that is the basis of the key information 16 (an encryption key in this example).

  When the offline electronic key 2b is registered in the ECU 25 by offline registration with the dealer 21b or the like, the ECU 25 inputs the first registration code C1 and the second registration code “C2-γ” from the offline electronic key 2b. The ECU 25 preferably takes in the first registration code C1 and the second registration code “C2-γ” using the hardware of the electronic key system 3.

  The ECU 25 (registration execution unit 22) uses the first registration code C1 acquired from the offline electronic key 2b to determine whether or not the key information 16 (the encryption key in this example) may be registered in the ECU 25. Run. In the case of this example, whether or not registration is possible is determined by comparing the first registration code C1 obtained from the offline electronic key 2b with the value determined by the ECU 25. When these matches are confirmed, registration of the key information 16 is permitted.

  When the ECU 25 (registration execution unit 22) confirms that the determination of whether or not registration is possible using the first registration code C1 is established, the ECU 25 generates key information 16 (in this example, an encryption key) and stores it in its own memory. 13 is registered. In this example, the key information 16 is created using the second registration code “C2-γ”. Thus, registration of the key information 16 is completed.

According to the configuration of this embodiment, in addition to (1) to (5) described in the first embodiment, the following effects can be obtained.
(6) At the time of offline registration, it is determined whether or not key registration is possible by using one of the first registration code C1 and the second registration code C2, so that the security of key registration is ensured. It will be advantageous.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. In the third embodiment, only parts different from the first and second embodiments will be described in detail.

  As shown in FIG. 8, in the online electronic key 2a, the first registration code C1 is provided as a key information creation code. In the online electronic key 2a, the second registration code “C2-γ” is provided as a key information creation code.

  When registering the electronic key 2 in the ECU 25 by online registration, the ECU 25 inputs the first registration code C1 and the second registration code “C2-γ” from the electronic key 2. Note that imposing center authentication in online registration is the same as in the first and second embodiments.

  When the ECU 25 (registration execution unit 22) inputs the first registration code C1 and the second registration code “C2-γ” from the online electronic key 2a, the key information 16 (in this example, the encryption key) is used using both. Generate the data and register it in its own memory 13. That is, in the case of online registration of this example, the key information 16 is created using the first registration code C1 and the second registration code “C2-γ”. Thus, registration of the key information 16 is completed.

  As shown in FIG. 9, in the offline electronic key 2b, the first registration code C1 is provided as both a key information creation code and a check code. In the offline electronic key 2b, the second registration code “C2-γ” is provided as a key information creation code.

  When registering the electronic key 2 in the ECU 25 by offline registration, the ECU 25 inputs the first registration code C1 and the second registration code “C2-γ” from the electronic key 2. At this time, the ECU 25 (registration execution unit 22) uses the first registration code C1 acquired from the electronic key 2 to determine whether or not the key information 16 (the encryption key in this example) may be registered in the ECU 25. Execute. In the case of this example, whether or not registration is possible is determined by comparing the first registration code C1 acquired from the electronic key 2 with the value determined by the ECU 25. When these matches are confirmed, registration of the key information 16 is permitted.

  When the ECU 25 (registration execution unit 22) confirms that the determination of whether or not registration is possible using the first registration code C1 is established, the ECU 25 generates key information 16 (in this example, an encryption key) and stores it in its own memory. 13 is registered. In the case of offline registration in this example, the key information 16 is created using the first registration code C1 and the second registration code “C2-γ”. Thus, registration of the key information 16 is completed.

According to the configuration of the present embodiment, in addition to (1) to (6) described in the first and second embodiments, the following effects can be obtained.
(7) Since the encryption key is generated using both the first registration code C1 and the second registration code C2, it is advantageous to create a correct encryption key.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
In each embodiment, the communication master 14 may be constructed from one ECU or a plurality of ECUs.

  In each embodiment, the electronic key system 3 may be a smart communication system in which the vehicle 1 and the electronic key 2 perform ID verification (smart verification) by narrow area communication. Further, when registering an immobilizer key, hardware of a smart communication system may be used.

  In each embodiment, the security level determination for key registration is not limited to a method performed by a registration command input from the registration tool (market tool) 18. For example, various methods such as setting a flag indicating the contents of the security level in the ECU 25 and performing level determination based on the flag can be adopted.

  In each embodiment, the center authentication may be authentication that confirms the validity of the communication master 14 and the electronic key 2 through the center 27. The center authentication is not limited to the authentication that is performed by the center 27 serving as a master, but may be authentication that confirms whether the center 27 is correct by the communication master 14 serving as an authentication master.

In each embodiment, the key information 16 may be any data or information as long as it is a matter that must be registered in the communication master 14 when performing key registration.
In each embodiment, the positioning of the communication master 14 includes implications such as the degree of registration limitation, type, functional characteristics, usage level, and confidentiality.

In each embodiment, the registration code C may be encrypted information necessary for key registration.
In each embodiment, the communication master 14 is not limited to the ECU 25 (collation ECU 4), and may be any device that manages communication with the electronic key 2.

In each embodiment, network communication is not limited to Internet communication, and can be changed to various wide area communications.
In each embodiment, the electronic key registration system 15 is not limited to being provided in the vehicle 1 and can be applied to various systems and devices.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(A) In the electronic key registration system, the key registration is executed using hardware of the electronic key system provided between the communication master and the electronic key. According to this configuration, it is possible to register the electronic key in the communication master using the hardware of the electronic key system, so there is no need to newly provide a separate part for key registration.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Electronic key, 2a ... Electronic key for online, 2b ... Electronic key for offline, 4 ... Verification ECU which is an example of communication master, 14 ... Communication master, 15 ... Electronic key registration system, 16 ... Key information , 17 ... level determination unit, 22 ... registration execution unit, 25 ... ECU, C ... registration code, C1 ... first registration code, C2, C2-α, C2-β, C2-γ ... second registration code.

Claims (7)

A registration code used at the time of key registration is transmitted from the electronic key to the communication master, the key information is determined using the registration code in the communication master, and the key information is registered in the communication master, whereby the electronic key is An electronic key registration system for registering with a communication master,
A plurality of the registration codes provided in accordance with the positioning of the communication master as a key registration destination;
A level determination unit that determines a security level of key registration when registering the electronic key in the communication master;
A registration execution unit that executes registration of the electronic key based on a plurality of the registration codes for the communication master having different key registration security levels according to the positioning of the communication master. Electronic key registration system. The registration code is
A code for generating key information which is a source of the key information;
Among the check codes used to confirm whether the key information may be generated,
The electronic key registration system according to claim 1, wherein the electronic key registration system includes at least the key information generation code. The electronic key registration system according to claim 1 or 2, wherein the positioning of the communication master is whether any electronic key can be registered, or only a specific electronic key can be registered. Key registration includes online registration for registering the electronic key with the communication master via network communication and offline registration for registering the electronic key with the communication master without going through the network communication,
The electronic key registration system according to any one of claims 1 to 3, wherein the level determination unit determines a security level of key registration based on whether the registration is online registration or offline registration. In the offline registration, by acquiring the first registration code from an offline electronic key provided with a first registration code provided as a key information generation code, and creating the key information from the first registration code, Perform key registration of the offline electronic key,
In the online registration, the second registration code is obtained from the online electronic key provided with the second registration code provided as the key information generation code, and the key information is created from the second registration code. , Register the online electronic key,
5. The electronic key registration system according to claim 4, wherein the off-line electronic key includes both the first registration code and the second registration code, so that it can be registered in the communication master even in the online registration. The registration code is
A code for generating key information which is a source of the key information;
Including a check code used to confirm whether or not the key information may be generated,
Key registration includes online registration for registering the electronic key with the communication master via network communication and offline registration for registering the electronic key with the communication master without going through the network communication,
The level determination unit determines the security level of key registration based on whether the registration is online or offline,
In the online registration, by acquiring the second registration code from an online electronic key provided with a second registration code provided as a key information generation code, and creating the key information from the second registration code, Perform key registration of the online electronic key,
In the offline registration, the first registration code and the second registration are obtained from an offline electronic key including a first registration code provided as a check code and a second registration code provided as the key information generation code. obtains the code, as well as create the key information from the second registration codes, by confirming the correctness of the key registration using the first registration code, claim 1 for key registration of the offline electronic key Electronic key registration system described in 1. In the online registration, the first registration code and the second registration code are obtained from an online electronic key provided with a first registration code and a second registration code provided as key information generation codes, and the first registration code is obtained. Registering the online electronic key by creating the key information using both a registration code and a second registration code;
In the off-line registration, the off-line electronic key including a first registration code serving as both a key information generation code and a check code and a second registration code provided as the key information generation code is used to generate the first registration code. Acquiring a registration code and a second registration code, creating the key information using both the first registration code and the second registration code, and confirming whether the key registration is correct using the first registration code 5. The electronic key registration system according to claim 4, wherein key registration of the off-line electronic key is performed.

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