JP5298807B2 - Electronic key system - Google Patents

Description

  The present invention relates to an electronic key system.

  Conventionally, as a technology in such a field, an electronic key system that performs authentication between a vehicle key and a vehicle by using wireless communication and can execute various operations of the vehicle is known (for example, Patent Document 1). ~ 4). In the technique described in Patent Document 1, by releasing an ID code with an expiration date using a mobile phone separately from a dedicated key, unlocking the vehicle when the dedicated key is not held, and starting the engine Is possible.

In the technique described in Patent Document 2, a key code necessary for an operation of a remote operation target is sent to a wireless portable terminal, and locking and unlocking are performed using the wireless portable terminal that has received the key code. , Limiting users. In the technique described in Patent Document 3, security is improved when the mobile phone is lost by limiting the number of times the electronic key is operated by the mobile phone. In the technology described in Patent Document 4, security is improved by creating signature data using random numbers when communicating between an electronic key and a vehicle.
JP 2007-137136 A JP 2004-243395 A JP-A-6-243395 JP 2006-9333 A

  For example, in valet parking where an employee moves a vehicle to a predetermined position in a parking lot, lending a dedicated vehicle key to another person may be a security problem. Further, since the mobile phone is always carried by the owner, there is a problem that it is difficult to lend a personal mobile phone to another person.

  The present invention has been made to solve such a problem, and provides an electronic key system capable of limiting the functions that can be executed by the electronic key when the electronic key is created. For the purpose.

  An electronic key system according to the present invention recognizes and recognizes a first terminal having a transmission means for transmitting a signal permitting execution of only a part of a plurality of functions, and a signal transmitted from the transmission means. And a second terminal capable of executing only a part of functions based on the signal.

  According to such an electronic key system, since the configuration includes the first terminal including a transmission unit that transmits a signal that permits execution of only a part of the plurality of functions, only the part of the functions is provided. An electronic key including a signal permitting execution can be transmitted to another terminal. Further, according to the electronic key system, the second terminal includes a storage unit that recognizes the signal transmitted from the transmission unit and stores the recognized signal, and can execute only a part of the function based on the signal. Since the electronic key including the signal permitting the execution of only a part of the function is received from the first terminal and stored, only the part of the function is executed with the stored electronic key. Is possible.

  Here, the partial function is preferably a function of locking / unlocking the door lock of the vehicle and a function of starting a drive source of the vehicle. As a result, when an electronic key is created, it is possible to enable only locking / unlocking of the vehicle door lock and starting of the drive source of the vehicle and disable other functions. And strengthening protection of personal information. Examples of the “other functions” include “trunk unlocking”, “console box unlocking”, and “electronic devices such as a navigation system”.

  ADVANTAGE OF THE INVENTION According to this invention, when an electronic key is produced, the electronic key system which can provide a restriction | limiting in the function which can be performed by an electronic key can be provided. Further, in the electronic key system of the present invention, since a function that can be executed by the electronic key combination can be limited, it is possible to realize the electronic key key with improved security performance.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an electronic key system according to the invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 is a block diagram showing an electronic key system according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing delivery of an electronic key in the electronic key system according to the embodiment of the present invention.

  The electronic key system shown in FIG. 1 is a keyless entry system using a mobile phone, and unlocks the door lock of the vehicle 40 using the mobile phones 10 and 30 storing key information without owning a dedicated key. It is possible to do. In this electronic key system, as shown in FIG. 2, key information is transferred from a mobile phone A (first terminal) 10 functioning as a parent key to a mobile phone B (second terminal) 30 functioning as an electronic key. It can be sent.

  The mobile phone A10 is, for example, a mobile phone of the owner A of the vehicle 40, and functions as a parent key that can execute the functions of the vehicle 40 without restriction. The mobile phone B30 is a mobile phone of the other person B to whom an electronic key is lent, and functions as a restricted electronic key that can execute only a part of the plurality of functions of the vehicle 40. . Details will be described later.

  As shown in FIG. 1, a vehicle 40 to which the electronic key system of this embodiment is applied controls locking / unlocking (operation permission / operation disapproval) using an electronic key (mobile phone A10, mobile phone B30). An electronic control unit (hereinafter referred to as “electronic key ECU”) 41 is provided.

  The electronic key ECU 41 includes a CPU that performs arithmetic processing, ROM and RAM serving as a storage unit, an input signal circuit, an output signal circuit, a power supply circuit, and the like, and includes a door lock control unit 51, an engine ECU 52, a trunk room lock control unit 53, an in-vehicle It is electrically connected to the machine 54. In the electronic key ECU 41, an electronic key recognition unit 42, a function restriction unit 43, and a vehicle state detection unit 44 are constructed by executing a program stored in the storage unit. The electronic key ECU 41 can communicate with the mobile phones 10 and 30 and can communicate with the center server 20 of the management center that issues the electronic key.

  The electronic key recognition unit 42 reads the key information of the mobile phones 10 and 30 and determines whether or not the electronic key can execute the function of the vehicle 40. The electronic key recognition unit 42 compares the encrypted data stored in the storage unit with the key information read from the mobile phones 10 and 30 to authenticate the electronic key.

  Further, the electronic key recognition unit 42 recognizes the key information and determines whether the mobile phone A10 functions as a parent key or the mobile phone B30 functions as a restricted electronic key. That is, the functions that can be executed by the mobile phones 10 and 30 and the use conditions (for example, use time) of the functions are determined.

  The functions of the vehicle 40 that can be executed by the electronic key include “door lock locking / unlocking”, “engine start permission”, “trunk room locking / unlocking”, “console box locking / unlocking”, “Usage permission of in-vehicle device functioning as car navigation device”, “Usage permission of in-vehicle device functioning as communication device capable of transmitting / receiving e-mail” and the like.

  The function restriction unit 43 controls execution / non-execution of various functions of the vehicle 40 based on the key information recognized by the electronic key recognition unit 42. The function restriction unit 43 outputs a command signal to the door lock control unit 51 to control locking and unlocking of the door lock. The function restriction unit 43 outputs a command signal to the engine ECU 52 to control engine start permission. The function restriction unit 43 outputs a command signal to the trunk room lock control unit 53 to control locking and unlocking of the trunk room. The function restriction unit 43 outputs a command signal to the in-vehicle device 54 and controls use permission of the in-vehicle device.

  The vehicle state detection unit 44 receives signals output from the door lock control unit 51, the engine ECU 52, the trunk room lock control unit 53, and the in-vehicle device 54, and locks / unlocks the door lock, the engine operating status, the trunk room The locked / unlocked state and the operating state of the in-vehicle device 54 can be detected.

  The vehicle state detection unit 44 is connected to a vehicle-mounted camera (not shown) and can detect the face of the driver. For example, when the door lock of the vehicle 40 is unlocked using the master key, the driver's face may be detected, and the function of the vehicle 40 may be limited based on the detection result. When the detected driver's face is not registered in the user information, a drive mode in which usable functions are limited, or a setting in which the engine cannot be started may be used.

  In the electronic key system, the management center connected to the network issues an electronic key, monitors the vehicle state of the vehicle 40, and the like. In the server 20 of the management center, an electronic key issuing unit 21 and a vehicle state monitoring unit 22 are constructed.

  The electronic key issuing unit 21 generates an electronic key that can be used in the vehicle 40. The electronic key issuing unit 21 generates a restricted electronic key based on the signal output from the mobile phone A10. The generated electronic key and restricted electronic key are transmitted to the mobile phone A10.

  The vehicle state monitoring unit 22 acquires information related to the vehicle state of the vehicle 40 based on the signal output from the vehicle 40. The vehicle state monitoring unit 22 outputs information about the acquired vehicle state to the mobile phone A10.

  The mobile phone A10 has a call function, a mail transmission / reception function, and a network connection function. In addition, the mobile phone A10 functions as a parent key that can execute the function of the vehicle 40 as described above. In the mobile phone A10, a restriction setting unit 11, an electronic key receiving unit 12, and an electronic key transmitting unit 13 are constructed.

  The restriction setting unit 11 can set the functions (partial functions) of the vehicle 40 that can be used by the restricted electronic key based on the operation by the operator. Information regarding the set partial functions is output to the center server 20.

  The electronic key receiving unit 12 functions as an electronic key receiving unit that receives an electronic key (key information) output from the center server 20. The electronic key transmitter 13 functions as an electronic key transmitter that transmits key information as a restricted electronic key to the mobile phone B30. In addition, the electronic key transmission unit 13 transmits key information as a parent key to the electronic key ECU 41. The electronic key transmission unit 13 functions as a transmission unit of the present invention that transmits a signal that permits execution of only some of the plurality of functions.

  Moreover, in the mobile phone A10, the status of the vehicle 40 can be confirmed via the management center. For example, when the key is used, information on the vehicle state of the vehicle 40 is acquired. In the mobile phone A10, based on the acquired information on the vehicle state, the door opening / closing state, the door lock locked / unlocked state, the engine operating state, the trunk room locking / unlocking state, the in-vehicle unit 54 operating state, the driver You can check the face image.

  The cellular phone B30 has a call function, a mail transmission / reception function, and a network connection function. In addition, as described above, the mobile phone B30 functions as a restricted electronic key that can execute part of the functions of the vehicle 40. In the mobile phone B30, an electronic key receiving unit 31, an electronic key transmitting unit 32, and a combined key information storage unit 33 are constructed.

  The electronic key receiving unit 31 functions as an electronic key receiving unit that receives an electronic key (key information) output from the mobile phone A10. The electronic key receiving unit 31 receives key information as a restricted electronic key.

  The combined key information storage unit 33 functions as a storage unit that stores the received key information. The electronic key transmission unit 32 transmits the key information stored in the combined key information storage unit 33 to 41.

  Examples of communication means from the mobile phone A10 to the mobile phone B30 include ad hoc communication such as Bluetooth and infrared, human body communication, and mail attachment.

  Next, the operation of the electronic key system according to the embodiment of the present invention will be described. 3 and 4 are flowcharts showing an operation procedure executed in the electronic key system according to the embodiment of the present invention. Step is abbreviated as S.

  First, a connection request is made from the mobile phone A10 of the owner (operator) A to the management center (S1). The cellular phone A10 transmits a connection request signal to the management center based on the operation by the operator. Next, the center server 20 of the management center transmits a response signal to the mobile phone A10 in response to a connection request from the mobile phone A10 (S2), and establishes a connection between the mobile phone A10 and the center server 20 (S3). .

  Next, the cellular phone A10 sets the restriction items in the restricted electronic key based on the operation by the operator (S4). Here, the functions that can be used, the expiration date, and the like are set by the restricted electronic key.

  Subsequently, the mobile phone A10 makes a restricted electronic key issuing request (S5). The cellular phone A10 transmits a restricted electronic key issuing request signal to the management center based on an operation by the operator.

  Next, the center server 20 of the management center issues an electronic key that functions as a restricted electronic key in response to a restricted electronic key issuance request from the mobile phone A10 (S6). Here, the electronic key issuing unit 21 of the center server 20 generates key information related to the restricted electronic key according to the restriction items set by the mobile phone A10.

  Subsequently, the center server 20 transmits the generated key information to the mobile phone A10, thereby transmitting an electronic key (S7).

  Next, the cellular phone A10 transmits the received electronic key to the cellular phone B30 (S8). The band phone A10 transmits key information related to the restricted electronic key to the mobile phone B30 based on an operation by the operator. That is, the electronic key is delivered by transmitting the key information to the mobile phone B30. This eliminates the need to lend a real key.

  The cellular phone B30 receives the electronic key by storing the received key information in the key information storage unit 33. When using the electronic key, the key user B operates the mobile phone B30 to transmit key information to the electronic key ECU 41. The cellular phone B30 transmits the key information (electronic key) stored in the key information storage unit 33 to the vehicle 40 based on the operation of the key user B (S9).

  The electronic key ECU 41 reads the key information output from the mobile phone B30 and authenticates the electronic key (S10). The electronic key ECU 41 controls locking / unlocking of the door lock, permission of engine start, and the like based on the recognized key information. In addition, functions that cannot be used due to the restricted electronic key (for example, unlocking the trunk room and operating the vehicle-mounted device) remain in an inexecutable state.

  Next, a signal relating to the vehicle state (for example, engine start, engine stop, etc.) is transmitted from the vehicle 40 to the management center (S11). The electronic key ECU 41 detects various states of the vehicle 40 and transmits a signal related to the vehicle state to the center server 20 of the management center.

  The signal regarding the vehicle state received at the management center is transmitted to the mobile phone A10 (S12). In addition, the management center periodically transmits a signal requesting information on the vehicle state to the vehicle 40 (S13). In response to a request from the management center, the electronic key ECU 41 transmits a signal relating to the vehicle state to the management center (S14).

  When the owner A wants to check the state of the vehicle 40, he / she operates the mobile phone A10 to request acquisition of information regarding the vehicle state. In response to the operation by the owner A, the cellular phone A10 transmits a signal requesting information on the vehicle state to the management center (S15).

  In response to a request from the mobile phone A10, the management center transmits a signal regarding the vehicle state to the mobile phone A10 (S16).

  The electronic key ECU 41 determines whether or not the use period of the restricted electronic joint key has expired, and when the use period has expired, the electronic key ECU 41 is set so that some functions made available by the restricted electronic joint key cannot be used. Change (S17). In addition, the electronic key ECU 41 transmits a signal (use end data) notifying that the use time limit of the restricted electronic key has ended to the management center (S18).

  When receiving the use end data, the center server 20 of the management center transmits the received use end data to the mobile phone A10 (S19) and disconnects from the mobile phone A10 (S20).

  FIG. 2 shows an example of a display image displayed on the mobile phone A10 and the mobile phone B30 when the restricted electronic key is transmitted from the owner A to the borrower B. For example, on the display screen of the mobile phone A10, a message such as “Send key information has been sent in a setting in which the navigation cannot be used. Expiration date: 3/13 until 17:04” is displayed, and the display screen of the mobile phone B30 Displays a message such as "The key information has been received in a setting in which the navigation cannot be used. Expiration date: 3/13 until 17:04."

  According to such an electronic key system, using the mobile phone A10, a restricted electronic key including a signal that permits execution of only a part of a plurality of functions is transmitted to the mobile phone B30. Can do. Further, the cellular phone B30 can recognize the electronic key transmitted from the cellular phone A10, and can execute only a part of the functions of the vehicle 40 based on the received key information of the electronic key. Thus, it is possible to limit the functions that can be executed by the electronic key, and there is no need to lend a master key or an electronic key having the same authority as the master key. Therefore, it is possible to solve the security problem and lend the electronic key to another person. For example, it is particularly effective to use a limited electronic key in valet parking. Also, by lending a restricted electronic key with an expiration date set, there is no need for the borrower to return the key.

  In addition, some functions that can be used with a restricted electronic key are limited to functions for locking / unlocking the vehicle door lock and functions for starting the vehicle drive source, and other functions cannot be executed. Can do. Therefore, it is possible to realize an electronic key with improved security function and enhanced protection of personal information. For example, it is possible to solve the problem that, when a vehicle is lent to another person, information on the in-vehicle device can be seen or inside the trunk room can be seen.

  In addition, in the conventional electronic key system, the electronic device (terminal) used as the electronic key must be pre-registered as a condition for creating the electronic key, the procedure is complicated, and the electronic key is temporarily lent. There was a problem that it was difficult. In the electronic key system of the present embodiment, a restricted electronic key can be issued with a simple procedure.

  Moreover, in the electronic key system of this embodiment, since the vehicle state of the vehicle 40 can be confirmed during the period in which the electronic key is lent, the owner A can rent the electronic key to another person with peace of mind. Can do.

  As mentioned above, although this invention was concretely demonstrated based on the embodiment, this invention is not limited to the said embodiment. In the above embodiment, a terminal that can be used as an electronic key is described as a mobile phone, but other terminals that can communicate with each other may be used.

It is a block block diagram which shows the electronic key system which concerns on embodiment of this invention. It is the schematic which shows delivery of the electronic joint key in the electronic key system which concerns on embodiment of this invention. It is a flowchart which shows the flowchart which shows the operation | movement procedure of the electronic key system which concerns on embodiment of this invention. It is a flowchart which shows the flowchart which shows the operation | movement procedure of the electronic key system which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Mobile phone A (1st terminal), 11 ... Restriction setting part, 12 ... Electronic key receiving part, 13 ... Electronic key transmission part, 20 ... Center server, 21 ... Electronic key issuing part, 22 ... Vehicle state monitoring part , 30 ... mobile phone B (second terminal), 31 ... electronic key receiving unit, 32 ... electronic key transmitting unit, 33 ... combination key information storage unit, 40 ... vehicle, 41 ... electronic key ECU, 42 ... electronic key recognizing unit , 43 ... function restriction unit, 44 ... vehicle state detection unit, 51 ... door lock control unit, 52 ... engine ECU, 53 ... trunk room lock control unit, 54 ... in-vehicle device.

Claims (1)

An electronic key system capable of transmitting key information from a first terminal to a second terminal,
The first terminal is
Transmitting means for transmitting, to the second terminal, restricted key information including a signal that permits execution of only some of the functions related to the vehicle ;
Obtaining means for obtaining information on the state of the vehicle after the sending means sends the restricted key information to the second terminal;
Equipped with a,
The second terminal is
Recognizing the signal transmitted from the transmission means, and comprising storage means for storing the recognized signal,
Based on the signal, only the partial function can be executed ,
The electronic key system characterized in that the partial functions are a function of locking / unlocking a door lock of the vehicle and a function of starting a drive source of the vehicle .

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