JP2007207187A - Electronic key device, target device, usage state setting method - Google Patents

Abstract

An object of the present invention is to prevent a target device from easily transitioning to an available state even when an electronic key is delivered to a third party.
An authentication process is performed using key information transmitted from an electronic key device. When the authentication process is performed, a portable terminal that is an electronic key device is shifted to an available state, and the portable terminal is Is used to shift the personal computer 31 to an available state.
[Effect] Authentication is performed using electronic information between two devices, and in order to perform authentication between two devices in a system that performs some operation when authentication is normally performed, two devices Only when the portable terminal is used as a third device different from the above and the authentication involving the portable terminal can be normally performed, the system in which the authentication between the two devices is established and operates can be realized.
[Selection] Figure 1

Description

  The present invention relates to an electronic key device, a target device, and a usage state setting method, and more particularly, an electronic key device that transmits information for making a target device usable state wirelessly or by wire, and wirelessly or wiredly transmitted from the electronic key device The present invention relates to a target device that can be used when an authentication process using information is performed, and a usage state setting method that manages an available state of the target device.

In the ubiquitous information society of “anytime, anywhere, with anyone”, it is necessary to create a space where information can be exchanged and shared by operating terminal devices with peace of mind.
In Non-Patent Document 1, the concept of a safe space in which a target device (that is, a target device) within a certain distance from an individual who has an electronic key (hereinafter referred to as an electronic key) can operate is referred to as Secure Private Cosm , Abbreviated as SPC). In the technique described in Non-Patent Document 1, authentication is always performed between a pair of objects using two-way wireless communication, and function control based on the distance between the pair of objects is enabled. In this case, authentication processing is performed by transmitting key information from the electronic key at a predetermined cycle (for example, a cycle of about 1 second) and receiving a response to the key information.

Only when a pair of a wearable electronic key and a portable terminal is within a certain distance, the portable terminal can be activated, that is, transitioned to an available state. Then, there is a space for using the target device around the person by the wearable electronic key, and when the person moves, the SPC space moves together. In order to realize this SPC, it is necessary to store the key information of the electronic key and the identifier of the target device in advance in association with each other.
“Introduction to SPC technology”, [online], [searched on January 25, 2006], Internet <URL: http://www.spc-c.com/about.html>

When the above-described conventional technology is used, when the electronic key is transferred to a third party, when the person operates the target device, the target device transitions to an available state against the intention of the owner. Then, when the target device is a personal computer (hereinafter referred to as a PC), confidential matters stored in the PC are browsed without permission. In addition, when the target device is a safe, an object stored in the safe can be taken out without permission. Furthermore, if the target device is the door key of the room, the user can enter the room.
The present invention has been made to solve the above-described problems of the prior art, and its purpose is to make it easy for the target device to transition to an available state even when the electronic key is in the hands of a third party. To provide an electronic key device, a target device, and a usage state setting method that can be prevented.

  An electronic key device according to a first aspect of the present invention is an electronic key device that performs an authentication process on a target device and changes the target device to a usable state, and performs the authentication process based on key information transmitted from another device. And an available state setting means for transitioning the own apparatus to an available state when an authentication process is performed by the authentication processing unit. If constituted in this way, in order to perform authentication between two devices in a system that performs some operation when authentication using electronic information is performed between two devices and authentication is normally performed, Only when the electronic key device is used as a third device different from the two devices and the authentication involving the electronic key device can be normally performed, the authentication between the two devices is established and the operation is performed. System can be realized. The electronic key device corresponds to, for example, the portable terminal 12 in FIG.

  According to a second aspect of the present invention, there is provided a target device comprising: an authentication processing unit that performs authentication processing using key information transmitted from an electronic key device; and an authentication process performed by the authentication processing unit using key information transmitted from each of a plurality of electronic key devices. And a usable state setting means for transitioning the own device to a usable state. If comprised in this way, only when the authentication process is each performed using the some electronic key apparatus, a target apparatus can be made into an available state. This target device corresponds to, for example, the personal computer 31 in FIG.

  The communication terminal device according to claim 3 of the present invention comprises: an authentication processing means for performing authentication processing on the own device and performing authentication processing using key information transmitted from an electronic key device that causes the device to transition to a usable state; And an authentication processing result transmitting unit that transmits at least one of the identification information of the electronic key device and the key information to the target device together with the authentication processing result of the authentication processing unit. With this configuration, the target device can be brought into an available state only when two linked authentication processes are performed. This communication terminal device corresponds to, for example, the portable terminal 12 in FIG.

  A target device according to a fourth aspect of the present invention provides at least one of identification information of an electronic key device that causes the device to transition to a usable state and key information transmitted from the electronic key device. An authentication process result receiving unit that is received together with the authentication process result, a determination unit that determines whether the content received by the authentication process result receiving unit is a predetermined combination, and a result of determination by the determination unit are predetermined. And a usable state setting means for transitioning the own device to a usable state. With this configuration, the target device can be brought into an available state only when two linked authentication processes are performed. This target device corresponds to, for example, the personal computer 31 in FIG.

  A usage state setting method according to claim 5 of the present invention is a usage state setting method for setting a target device to one of an available state and an unavailable state, which is transmitted from the first electronic key device. A first authentication processing step for performing authentication processing using the key information to be authenticated, and authentication using the key information transmitted from the second electronic key device that becomes available when authentication is performed by the first authentication processing step. A second authentication processing step for performing processing; and an available state transition step for transitioning the target device to an available state when authentication is performed in the second authentication processing step. If such a method is adopted, authentication using electronic information is performed between two devices, and in a system that performs some operation when authentication is normally performed, authentication between the two devices is performed. In addition, the authentication between the two devices is established only when the electronic key device is used as a third device different from the two devices and the authentication involving the electronic key device can be normally performed. A working system can be realized.

  A usage state setting method according to claim 6 of the present invention is a usage state setting method for setting a target device to one of an available state and an unavailable state, and is transmitted from the first electronic key device. A first authentication processing step for performing authentication processing using the key information, a second authentication processing step for performing authentication processing using the key information transmitted from the second electronic key device, and authentication performed by the first authentication processing step. And a usable state transition step of transitioning the target device to a usable state when authentication by the second authentication processing step is performed. By adopting such a method, the target device can be made available only when authentication processing is performed using a plurality of electronic key devices.

  A usage state setting method according to claim 7 of the present invention is a usage state setting method for setting a target device to one of an available state and an unavailable state, and key information transmitted from an electronic key device. A first authentication processing step for performing an authentication process according to the above, and an authentication processing result for transmitting at least one of the identification information of the electronic key device and the key information to the target device together with the authentication processing result of the first authentication processing step. A transmission step, a determination step for determining whether the content transmitted in the authentication processing result transmission step is a predetermined combination, and a result of determination in the determination step are a predetermined combination, A second authentication process step for performing an authentication process, and the target when the authentication by the second authentication process step is performed. Characterized in that it comprises a usable state transition step to transition the device to a usable state. If such a method is adopted, the two authentication processes can be linked, and the target device can be brought into an available state only when the linked authentication process is performed.

  As described above, when authentication processing is performed using key information transmitted from another device, the electronic key device can be normally authenticated by changing the electronic key device to an available state. In such a case, authentication between the two devices can be established and a system that operates can be realized. For this reason, even when only one of the electronic keys is in the hands of a third party, it is possible to prevent the target device from changing to an available state against the intention of the owner.

  In addition, only when authentication processing is performed by key information transmitted from each of a plurality of electronic key devices, the authentication processing is performed using a plurality of electronic key devices by changing the target device to an available state. Only when this is done, a system that can make the target device available can be realized. For this reason, even when only one of the electronic keys is in the hands of a third party, it is possible to prevent the target device from changing to an available state against the intention of the owner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings referred to in the following description, the same parts as those in the other drawings are denoted by the same reference numerals.
(First embodiment)
FIG. 1A is a diagram showing a schematic configuration of an electronic key system configured using the electronic key device according to the first embodiment of the present invention. In the figure, the system of the present embodiment includes an electronic key device 11, a portable terminal 12 that functions as an electronic key device, and a personal computer (hereinafter abbreviated as a personal computer) 31. In this system, only when the authentication process 100 is performed between the electronic key device 11 and the mobile terminal 12, the function as the electronic key of the mobile terminal 12 transitions to an available state, and transitions to this available state. The authentication process 200 is performed between the portable terminal 12 and the personal computer 31.
In order to realize such an operation, the key information transmission unit 111 is provided in the electronic key device 11, the authentication processing unit 211 and the key information transmission unit 213 are provided in the mobile terminal 12, and the authentication processing unit 311 is provided in the personal computer 31. Yes.

  FIG. 2 is a block diagram illustrating a configuration example of the electronic key device 11, the mobile terminal 12, and the personal computer 31 in FIG. In the figure, an electronic key device 11 has a key information transmission unit 111 that transmits key information. In addition, the mobile terminal 12 includes an authentication processing unit 211 that performs an authentication process using the received key information, an available state setting unit 212 that causes the terminal itself to transition to an available state, and key information transmission that transmits key information. Part 213. Furthermore, the personal computer 31 includes an authentication processing unit 311 that performs an authentication process using the received key information, and an available state setting unit 312 for transitioning itself to an available state.

  An example of the operation of the electronic key system having such a configuration will be described with reference to FIG. In the figure, the key information is transmitted from the electronic key device 11 to the portable terminal 12 to make an authentication request (step S301). The mobile terminal 12 that has received the key information confirms whether the key information is registered in advance and is valid (step S302). If the key information is registered and valid, authentication is established (step S303). As a result, the mobile terminal 12 transitions to an available state such as the operation being turned on (step S304). Note that the processing from step S301 to step S303 is periodically repeated at a predetermined cycle (for example, a cycle of about 1 second).

Next, the key information is transmitted from the portable terminal 12 that has transitioned to the usable state to the personal computer 31, and an authentication request is made (step S305). The personal computer 31 that has received the key information confirms whether the key information is registered in advance and is valid (step S306). If the key information is registered and valid, authentication is established (step S307). As a result, the personal computer 31 transitions to an available state, such as an operation ON state (step S308). Note that the processing from step S305 to step S307 is periodically repeated at a predetermined cycle (for example, a cycle of about 1 second).
Since it operates as described above, only when authentication involving the electronic key device can be performed normally, authentication between the two devices can be established and an operating system can be realized. For this reason, even when only one of the electronic keys is in the hands of a third party, it is possible to prevent the target device from changing to an available state against the intention of the owner.

(Second Embodiment)
FIG.1 (b) is a figure which shows schematic structure of the electronic key system comprised using the target apparatus by the 2nd Embodiment of this invention. In the same figure, the system of this embodiment is comprised from the electronic key apparatus 11, the portable terminal 12, and the personal computer 31 which is a target apparatus. In this system, the personal computer 31 can be used only when the authentication process 101 is performed between the electronic key device 11 and the personal computer 31 and the authentication process 102 is performed between the portable terminal 12 and the personal computer 31. It is supposed to transition to.
In order to realize such an operation, the key information transmission unit 111 is provided in the electronic key device 11, the key information transmission unit 213 is provided in the mobile terminal 12, and the authentication processing unit 311 ′ is provided in the personal computer 31.

FIG. 4 is a block diagram showing a configuration example of the electronic key device 11, the mobile terminal 12, and the personal computer 31 in FIG. In the figure, an electronic key device 11 has a key information transmission unit 111 that transmits key information. The portable terminal 12 has a key information transmission unit 213 that transmits key information. Furthermore, the personal computer 31 includes an authentication processing unit 311 ′ that performs an authentication process for each of the received plurality of key information, and an available state setting unit 312 for transitioning itself to an available state.
The authentication processing unit 311 ′ has a function of performing authentication processing with all of a plurality of key information registered in advance. Then, only when the authentication process is performed between all of the plurality of key information and the authentication processing unit 311 ′, the available state setting unit 312 causes the personal computer 31 to transition to the available state.

  An operation example of the electronic key system having such a configuration will be described with reference to FIG. In the figure, authentication information is requested by transmitting key information from the electronic key device 11 to the personal computer 31 (step S501). The personal computer 31 that has received the key information checks whether the key information is registered in advance and is valid (step S502). If the key information is registered and valid, authentication is established (step S503).

Further, key information is transmitted from the portable terminal 12 to the personal computer 31 to make an authentication request (step S504). The personal computer 31 that has received the key information checks whether the key information is registered in advance and is valid (step S505). If the key information is registered and valid, authentication is established (step S506). As a result, the personal computer 31 transitions to an available state such as an operation ON state (step S507).
Here, the processing from step S501 to step S503 and the processing from step S504 to step S506 are each periodically repeated at a predetermined cycle (for example, a cycle of about 1 second). Note that either the process from step S501 to step S503 or the process from step S504 to step S506 may be performed first.

In order to operate as described above, a plurality of electronic key devices can be obtained by changing the target device to an available state only when authentication processing is performed using key information transmitted from each of the plurality of electronic key devices. Only when the authentication process is performed using each, a system that can make the target device available can be realized. For this reason, even when only one of the electronic keys is in the hands of a third party, it is possible to prevent the target device from changing to an available state against the intention of the owner.
For example, when a parent and his / her child have electronic key devices, the target device does not transition to the use state unless authentication processing is performed simultaneously with both electronic key devices.

(Application examples)
You may combine 1st Embodiment mentioned above and 2nd Embodiment.
For example, as shown in FIG. 6, key information transmission units 111 a and 111 b are provided in a plurality of electronic key devices 11 a and 11 b, and authentication processes 101 a and 101 b are performed with the mobile terminal 12. Only when transitioning to the available state, authentication processing may be performed between the mobile terminal 12 and the personal computer 31 to transition the personal computer 31 to the usable state.
Further, for example, as shown in FIG. 7, using a portable terminal 12a having an authentication processing unit 211a and a key information transmission unit 213a, and a portable terminal 12b having an authentication processing unit 211b and a key information transmission unit 213b. Also good. In this case, only when the authentication processes 101 and 102 are performed between the portable terminals 12a and 12b and one electronic key device 11, the portable terminals 12a and 12b are changed to the usable state, and they are used. Authentication processing 200a and 200b may be performed between the personal computer 31 and the personal computer 31 may transition to an available state.

(Other application examples)
FIG. 8 is a block diagram showing another configuration example of the electronic key system. In the figure, an electronic key device 11 has a key information transmission unit 111 that transmits key information. In addition, the mobile terminal 12 sends the authentication processing unit 211 that performs authentication processing using the key information transmitted from the electronic key device 11 and the identification information of the electronic key device 11 to the target device 31 together with the authentication processing result of the authentication processing unit 211. And an authentication processing result transmission unit 214 for transmission. Further, the personal computer 31 is an authentication processing result receiving unit 313 that receives the identification information of the electronic key device together with the authentication processing result, and whether the received authentication processing result and the identification information of the electronic key device are a predetermined combination. The determination unit 314 to be determined and the authentication processing unit 311 that performs the authentication process when the result of the determination by the determination unit 314 is a predetermined combination, and the device can be used for transitioning the device itself to an available state. A state setting unit 312.

  An operation example of the electronic key system having such a configuration will be described with reference to FIGS. In FIG. 9, the identification information of the electronic key device 11a is “A”. Key information is transmitted from the electronic key device 11a to the portable terminal 12 to make an authentication request (step S301). The mobile terminal 12 that has received the key information confirms whether the key information is registered in advance and is valid (step S302). If the key information is registered and valid, authentication is established (step S303). As a result, the mobile terminal 12 transitions to an available state such as the operation being turned on (step S304). Note that the processing from step S301 to step S303 is periodically repeated at a predetermined cycle (for example, a cycle of about 1 second).

Next, the portable terminal 12 that has transitioned to the usable state transmits, to the personal computer 31, that the authentication processing result is OK and the identification information “A” of the electronic key device 11 a in addition to the key information. Then, an authentication request is made (step S305).
The personal computer 31 that has received the authentication processing result and the identification information of the electronic key device first determines whether the received authentication processing result and the identification information of the electronic key device 11a are a predetermined combination (step S306 ′). . In this example, it is assumed that these are predetermined combinations.

  Therefore, the determination result is OK, and it is further confirmed whether the key information is registered in advance and is valid (step S306). If the key information is registered and valid, authentication is established (step S307). As a result, the personal computer 31 transitions to an available state, such as an operation ON state (step S308). Note that the processing from step S305 to step S307 is periodically repeated at a predetermined cycle (for example, a cycle of about 1 second).

  On the other hand, in FIG. 10, the identification information of the electronic key device 11b different from the electronic key device 11a is “B”. Key information is transmitted from the electronic key device 11b to the portable terminal 12 to make an authentication request (step S301). The mobile terminal 12 that has received the key information confirms whether the key information is registered in advance and is valid (step S302). If the key information is registered and valid, authentication is established (step S303). As a result, the mobile terminal 12 transitions to an available state such as the operation being turned on (step S304). Note that the processing from step S301 to step S303 is periodically repeated at a predetermined cycle (for example, a cycle of about 1 second).

Next, the portable terminal 12 that has transitioned to the usable state transmits, to the personal computer 31, that the authentication processing result is OK and the identification information “B” of the electronic key device 11 b in addition to the key information. Then, an authentication request is made (step S305).
The personal computer 31 that has received the authentication processing result and the identification information of the electronic key device first determines whether the received authentication processing result and the identification information of the electronic key device 11a are a predetermined combination (step S306 ′). . In this example, it is assumed that these are not predetermined combinations.
For this reason, since the determination result is NG, the key information is not registered and is not valid (step S306), and therefore the authentication is NG (step S307 ′). As a result, the personal computer 31 does not transition to the available state.

  As described above, in this example, since the authentication between the electronic key device and the portable terminal and the authentication between the portable terminal and the personal computer (that is, the target device) are linked, the following effects are obtained. It is done. That is, as shown in FIG. 11, consider a case where the administrator has the portable terminal 12 and different managed persons have the electronic key devices 11a, 11b, and 11c. When the personal computer 31a as the target device is authenticated with the electronic key device with the identification information “A”, the personal computer 31b is authenticated with the electronic key device with the identification information “B”. When the authentication is successful with the electronic key device “C”, the state changes to an available state.

  In such a case, if the person who owns the portable terminal 12 and the person who possesses the electronic key device 11a are near the personal computer 31a, the personal computer 31a can be shifted to an available state. On the other hand, even if the person who owns the portable terminal 12 and the person who possesses the electronic key device 11a are near the personal computer 31b, the personal computer 31b cannot be changed to an available state. In other words, if the personal computer 31a is not a predetermined combination of the electronic key device and the portable terminal (that is, if the administrator and the specific managed person are not close together), the personal computer 31a makes it usable. It cannot be transitioned.

  In addition, when the person who possesses the portable terminal 12 and the person who possesses the electronic key device 11b are near the personal computer 31b, the personal computer 31b can be changed to an available state, and the portable terminal 12 is possessed. Of course, when the person who holds the electronic key device 11c is near the personal computer 31c, the personal computer 31c can be shifted to the usable state.

  In the above description, the mobile terminal 12 transmits the identification information of the electronic key device 11 to the personal computer that is the target device together with the authentication processing result, but the key information received from the electronic key device 11 instead of the identification information. May be transmitted to the personal computer together with the authentication processing result. In this case, the personal computer performs the authentication process for the key information in addition to determining the authentication process result. Moreover, you may make it transmit both the identification information and key information of the electronic key apparatus 11 to a personal computer with an authentication process result. In short, at least one of the identification information and key information of the electronic key device 11 may be transmitted to the personal computer together with the authentication processing result, and the personal computer may determine whether the received contents are a predetermined combination.

  In the above description, the portable terminal 12 has transitioned to the usable state by the authentication process with the electronic key device 11 (see step S304 in FIGS. 9 and 10), but the entire function of the terminal is used by the authentication. There is no need to switch between a possible state and an unusable state. That is, of the functions of the mobile terminal 12, it is sufficient that only the functions for performing authentication processing with the personal computer (that is, the authentication processing unit 211 and the authentication processing result transmission unit 214 in FIG. 8) operate. Or the like) may be in an always available state or an always unavailable state.

(Usage status setting method)
In the system described above, the following usage state setting method is realized.
In other words, in the first embodiment, there is a usage state setting method for setting a target device to one of an available state and an unavailable state, and key information transmitted from the first electronic key device. The authentication process is performed by the first authentication process step for performing the authentication process by the key information transmitted from the second electronic key device that becomes available when the authentication by the first authentication process step is performed. A usage state setting method is realized that includes a second authentication processing step and an available state transition step for transitioning the target device to an available state when authentication is performed in the second authentication processing step. If such a method is adopted, authentication using electronic information is performed between two devices, and in a system that performs some operation when authentication is normally performed, authentication between the two devices is performed. In addition, the authentication between the two devices is established only when the electronic key device is used as a third device different from the two devices and the authentication involving the electronic key device can be normally performed. A working system can be realized.

  Further, in the second embodiment, there is a usage state setting method for setting a target device to one of an available state and an unavailable state, and key information transmitted from the first electronic key device. Authentication is performed by the first authentication processing step for performing authentication processing, the second authentication processing step for performing authentication processing based on the key information transmitted from the second electronic key device, and the first authentication processing step. And a usable state setting method including a usable state transition step for transitioning the target device to a usable state when authentication is performed in the second authentication processing step. By adopting such a method, the target device can be made available only when authentication processing is performed using a plurality of electronic key devices.

  Furthermore, in another application example described above, there is a usage state setting method for setting a target device to one of a usable state and an unusable state, and authentication is performed using key information transmitted from an electronic key device. A first authentication processing step for performing processing, and an authentication processing result transmission step for transmitting at least one of the identification information of the electronic key device and the key information to the target device together with the authentication processing result of the first authentication processing step. And a determination step for determining whether or not the content transmitted in the authentication processing result transmission step is a predetermined combination, and a result of the determination in the determination step is a predetermined combination. A second authentication processing step for performing the authentication, and the target device when the authentication by the second authentication processing step is performed. Use state setting method comprising the availability status transition steps to transition to the available state is realized. If such a method is adopted, the two authentication processes can be linked, and the target device can be brought into an available state only when the linked authentication process is performed.

(Summary)
In the conventional key system, the key and the target device are bound one-on-one. In this case, if the key is lost due to loss or theft, the registered information on the target device is changed (invalidation of the lost key). Until the process is completed, the lost key remains valid, and a third party can obtain the above key and use it, which is a very big security issue. . By using this system, even if the key is lost, the key alone will not work as a valid key, so existing problems can be solved.

  The present invention can be used in a system that uses a target device and an electronic key device that transmits information for making it available for use wirelessly or by wire.

(A) is a figure which shows schematic structure of the electronic key system comprised using the electronic key apparatus by the 1st Embodiment of this invention, (b) is comprised using the target apparatus by the 2nd Embodiment of this invention. It is a figure which shows schematic structure of the made electronic key system. It is a block diagram which shows the structure of each part of Fig.1 (a). It is a sequence diagram which shows operation | movement of each part of FIG. It is a block diagram which shows the structure of each part of FIG.1 (b). It is a sequence diagram which shows operation | movement of each part of FIG. It is a figure which shows an application example. It is a figure which shows the other application example. It is a block diagram which shows the structure of the electronic key system of another application example. It is a sequence diagram which shows the operation example of each part of FIG. FIG. 9 is a sequence diagram illustrating another operation example of each unit in FIG. 8. It is a figure which shows the operation example of the electronic key system of FIG.

Explanation of symbols

11, 11a, 11b Electronic key device 12, 12a, 12b Portable terminal 31 Personal computer 111, 111a, 111b,
213, 213a, 213b Key information transmission unit 211, 211a, 211b, 311, 311 ′ Authentication processing unit 212, 312 Available state setting unit

Claims (7)

  An electronic key device that performs an authentication process on a target device and changes the target device to a usable state, and performs an authentication process using key information transmitted from another device, and the authentication processing unit An electronic key device comprising: an available state setting means for transitioning the own device to an available state when an authentication process is performed.   When the authentication processing means for performing authentication processing with the key information transmitted from the electronic key device and the authentication processing by the authentication processing means with the key information transmitted from each of the plurality of electronic key devices, respectively, And a usable state setting means for making a transition to a usable state.   An authentication processing means for performing authentication processing on the own device and performing authentication processing using key information transmitted from an electronic key device that changes the device to a usable state; and identification information of the electronic key device and the key information. A communication terminal apparatus comprising: an authentication process result transmitting unit configured to transmit at least one to the target device together with an authentication process result of the authentication process unit.   Authentication processing result receiving means for receiving at least one of identification information of an electronic key device that causes the device to transition to a usable state and key information transmitted from the electronic key device together with an authentication processing result for the electronic key device And determining means for determining whether the content received by the authentication processing result receiving means is a predetermined combination, and if the result of determination by the determining means is a predetermined combination, A target device comprising: an available state setting means for transitioning to an available state.   A usage state setting method for setting a target device to one of an available state and an unusable state, wherein the first authentication process performs an authentication process using key information transmitted from a first electronic key device A second authentication processing step for performing an authentication process using key information transmitted from a second electronic key device that becomes available when authentication is performed by the first authentication processing step; And a usable state transition step of transitioning the target device to a usable state when authentication is performed by the second authentication processing step.   A usage state setting method for setting a target device to one of an available state and an unusable state, wherein the first authentication process performs an authentication process using key information transmitted from a first electronic key device A second authentication processing step for performing authentication processing using key information transmitted from the second electronic key device, and authentication performed by the first authentication processing step, and the second authentication. A usage state setting method comprising: an available state transition step for transitioning a target device to an available state when authentication is performed by a processing step.   A usage state setting method for setting a target device to one of an available state and an unusable state, a first authentication processing step for performing an authentication process using key information transmitted from an electronic key device; At least one of the identification information of the electronic key device and the key information is transmitted together with the authentication processing result of the first authentication processing step to the target device and transmitted in the authentication processing result transmission step. A determination step for determining whether the content is a predetermined combination, a second authentication processing step for performing an authentication process when the determination result of the determination step is a predetermined combination, and An availability state for transitioning the target device to an available state when authentication is performed in the second authentication processing step. Use state setting method characterized by comprising a transition step.

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