JP2022023406A - Authentication system, authentication device and authentication method - Google Patents

Abstract

To provide an authentication system, an authentication device, and an authentication method that can prevent fraud such as impersonation of a person in biometric information authentication, with a simple configuration.SOLUTION: An authentication device 20 stores registered biometric information 24a registered in advance by a plurality of users and an authentication allowable condition 24c for allowing authentication processing corresponding to each of the plurality of users. A payment terminal 40 as a biometric information acquisition unit acquires acquisition biometric information 46a from the user. The authentication device 20 authenticates one person from among the plurality of users based on the stored registered biometric information 24a and the acquired acquisition biometric information 46a, and allows the authentication when condition correspondence information 46b satisfies the authentication allowable condition 24c.SELECTED DRAWING: Figure 1

Description

The present invention relates to an authentication system, an authentication device, and an authentication method capable of preventing fraud such as impersonation of a person in biometric information authentication with a simple configuration.

Conventionally, in the field of personal authentication, technology for preventing false authentication has been adopted. For example, in Patent Document 1, a wide-angle camera and a face recognition device including a pair of mirrors provided at the left and right positions of the wide-angle camera are configured to wide-angle the front image of the face of the person to be authenticated as a direct image. In addition to being incident on the camera, the right side image and the left side image of the face of the person to be authenticated are incident on the wide-angle camera as a reflection image by two mirrors, and the front image, the right side image and the left side image of the face are simultaneously projected on the wide-angle camera. By taking an image with a camera, the authentication accuracy and the authentication speed are improved, and spoofing is prevented. In addition, as an existing technology to prevent spoofing, it is known as a general function to perform "liveness check" that "living human" is authenticated, such as detecting blinking eyes, which is not a photograph. There is.

Japanese Unexamined Patent Publication No. 2007-011456

By the way, in the face recognition payment, the user's face recognition is performed by the tablet placed in the store, and the payment is completed when the authentication is passed. This face recognition payment is convenient because the shopping user can complete the payment without having to carry a wallet or smartphone. However, biometric authentication such as face authentication has a problem that it is not possible to prevent fraudulent use of credit card payment if fraudulent impersonation such as forgery of biometric information is performed. Here, it is possible to improve the accuracy of biometric authentication and reduce fraud such as spoofing, but it takes a lot of time and effort.

The present invention has been made to solve the above-mentioned problems, and provides an authentication system, an authentication device, and an authentication method capable of preventing fraud such as impersonation of a person in biometric information authentication with a simple configuration. The purpose is to provide.

In order to solve the above-mentioned problems and achieve the object, the present invention corresponds to a registered biometric information storage unit that stores registered biometric information registered in advance by a plurality of users, and a corresponding to each of the plurality of users. The authentication condition storage unit that stores the authentication acceptance condition that allows the authentication process, the biometric information acquisition unit that acquires the acquired biometric information from the user, the stored registered biometric information, and the acquired biometric information. Based on this, it is characterized by including an authentication processing unit that authenticates one person from the plurality of users and allows the authentication when the authentication acceptance condition is satisfied.

Further, in the present invention, in the above invention, the biometric information acquisition unit is set in a plurality of areas corresponding to a plurality of usage areas, and the authentication permissible condition depends on the usage area in which the biometric information acquisition unit is installed. It is characterized in that it sets whether or not to allow the authentication process.

Further, the present invention is characterized in that, in the above invention, the use area where the authentication process is permitted under the authentication allowable condition is set as an allowable value of the distance from a predetermined point.

Further, in the present invention, in the above invention, the biometric information acquisition unit is set in a plurality of areas corresponding to a plurality of usage areas, and the authentication permissible condition depends on the facility in which the biometric information acquisition unit is installed. It is characterized in that it sets whether or not to allow authentication processing.

Further, in the present invention, in the above invention, the biometric information acquisition unit is set in a plurality of areas corresponding to a plurality of usage areas, and the authentication permissible condition is a service type in the facility where the biometric information acquisition unit is installed. It is characterized in that whether or not the authentication process is permitted is set according to the above.

Further, the present invention is characterized in that, in the above invention, the authentication permissible condition sets whether or not the authentication process is permitted according to the time.

Further, the present invention is characterized in that, in the above invention, the authentication permissible condition sets whether or not the authentication process is permitted according to the usage amount.

Further, in the present invention, it is a special report that the registered biometric information storage unit sets the authentication permissible condition in response to an input by each of the plurality of users.

Further, the present invention is characterized in that, in the above invention, the authentication processing unit executes at least two types of authentication processes and permits authentication when all the authentication processes are valid.

Further, the present invention stores a registered biometric information storage unit that stores registered biometric information registered in advance by a plurality of users, and an authentication permissible condition that allows authentication processing corresponding to each of the plurality of users. From the plurality of users based on the authentication condition storage unit, the authentication side biometric information acquisition unit that acquires the acquired biometric information from the user, the stored biometric information, and the acquired biometric information. It is characterized by comprising an authentication processing unit that authenticates one person and permits the authentication when the authentication acceptance condition is satisfied.

Further, the present invention stores a registered biometric information storage step for storing registered biometric information registered in advance by a plurality of users, and an authentication permissible condition for permitting authentication processing corresponding to each of the plurality of users. Based on the authentication condition storage step, the biometric information acquisition step of acquiring the biometric information acquired from the user, the stored biometric information, and the acquired biometric information, one of the plurality of users is selected. It is characterized by including an authentication processing step that authenticates and permits the authentication when the authentication acceptance condition is satisfied.

According to the present invention, it is possible to prevent fraud such as impersonation of a person in biometric information authentication with a simple configuration.

FIG. 1 is an explanatory diagram for explaining an outline of the authentication system according to the present embodiment. FIG. 2 is a block diagram showing an internal configuration of the mobile terminal shown in FIG. FIG. 3 is a block diagram showing an internal configuration of the authentication device shown in FIG. FIG. 4 is a diagram showing an example of authentication acceptance conditions. FIG. 5 is a block diagram showing an internal configuration of the payment terminal shown in FIG. FIG. 6 is a diagram showing an operation input example at the time of registration of registered biometric information or the like by a mobile terminal. FIG. 7 is a flowchart showing an authentication processing procedure by the authentication device.

Hereinafter, preferred embodiments of the authentication system, the authentication device, and the authentication method according to the present invention will be described in detail with reference to the accompanying drawings.

<Overview of the authentication system according to the embodiment>
First, the outline of the authentication system according to this embodiment will be described. FIG. 1 is an explanatory diagram for explaining an outline of the authentication system according to the present embodiment. Here, the user registers biometric information such as face information from a mobile terminal such as a smartphone to the authentication device, and then the authentication device performs the registered biometric information of the registered user and the currently acquired acquisition. It shows an authentication system that collates with biometric information and performs authentication processing of the person. The face information is an example of biometric information, and biometric information such as iris information, fingerprint information, palm information, vein information, and voiceprint information may be used.

Here, even if the authentication process of the registered biometric information and the acquired biometric information is valid, if the acquired biometric information is spoofed, an unauthorized authentication process is performed. Therefore, in the present embodiment, as a weighted condition of the biometric authentication process, an authentication permit condition that allows the authentication process is provided. The authentication permissible condition is set by the user in advance, and limits the usage area, facility, time, usage amount, etc. from which the acquired biometric information is acquired. Multiple usage areas may be set. Further, the use area may be set as an allowable value of the distance to a predetermined point. For example, the use area may be set as a range with a radius of 5 km from the point A. As the usage area, a facility such as a convenience store of a predetermined series may be set. In addition, the facility may provide a specific service type such as food, medical care, and games.

For example, if Tokyo is set as the authentication acceptance condition, the area where the acquired biometric information is acquired is Hokkaido, or if the biometric authentication process is valid but the authentication acceptance condition is not satisfied, the authentication process is performed. Is determined to be unjustified. In the present embodiment, by setting the weighted condition of the biometric authentication process to satisfy the authentication allowable condition at the time of the biometric authentication process, for example, it is possible to prevent erroneous authentication in a usage area where the user does not perform the biometric authentication process. Can be done.

As shown in FIG. 1, in the authentication system, a mobile terminal 10, an authentication device 20, a payment server 30, and a payment terminal 40 are connected to a network N such as the Internet. Here, the case where the authentication result of the authentication system is used for credit card payment is shown, and FIG. 1 shows the case where the payment server 30 using the authentication processing result is included.

The mobile terminal 10 is a device of a user who registers the registered biometric information 24a, the authentication allowable condition 24c, and the registration password 24e in the authentication device 20. The payment terminal 40 is a tablet terminal in a store that performs credit card payment, and when a user uses credit card payment, the acquired biometric information 46a, condition correspondence information 46b, and input password 46c are transmitted to the authentication device 20. It is a device. The condition correspondence information 46b is information corresponding to the authentication allowable condition 24c, and includes, for example, the position information (use area or point) of the payment terminal 40. The authentication device 20 contains the registered biometric information 24a, the authentication allowable condition 24c, and the registration password 24e registered from the mobile terminal 10, and the acquired biometric information 46a, the condition correspondence information 46b, and the input password 46c sent from the payment terminal 40, respectively. The collation is performed and the authentication process is performed, and the authentication result is transmitted to the payment server 30.

As an authentication processing procedure, first, the mobile terminal 10 registers the registered biometric information 24a, the authentication allowable condition 24c, and the registration password 24e in the authentication device 20 in advance (S1). After that, when the user makes a credit card payment, the payment terminal 40 sends the acquired biometric information 46a, the condition correspondence information 46b, and the input password 46c to the authentication device 20, and applies for authentication (S2). After that, the authentication device 20 collates the registered biometric information 24a with the acquired biometric information 46a to authenticate the biometric information, determines whether or not the condition correspondence information 46b satisfies the authentication permissible condition 24c, and further. An authentication process is performed to determine whether or not the registered password 24e and the input password 46c match (S3). In the authentication process, it is determined that the authentication result is valid only when the authentication of the biometric information is valid, the condition correspondence information 46b satisfies the authentication allowable condition 24c, and the registration password 24e and the input password 46c match. .. After that, the authentication device 20 transmits the authentication result to the payment server 30 (S4). The payment server 30 receives a payment request from the payment terminal 40 and makes a payment only when the authentication result is valid.

In the above embodiment, the password determination is performed, but the password determination is not essential. That is, the authentication of the biometric information and the condition determination may be performed.

<Internal configuration of mobile terminal 10>
Next, the internal configuration of the mobile terminal 10 shown in FIG. 1 will be described. FIG. 2 is a block diagram showing an internal configuration of the mobile terminal 10 shown in FIG. As shown in FIG. 2, the mobile terminal 10 includes an operation display unit 11, a camera 12, a microphone 13, a speaker 14, a communication unit 15, a storage unit 16, and a control unit 17. It should be noted that, for convenience of explanation, only the part directly related to the present invention is described here, and the other explanations are omitted.

The operation display unit 11 is an input / output device such as a liquid crystal touch panel. The camera 12 is an image pickup device provided on the back surface of the mobile terminal 10 or the like. The microphone 13 is a voice input device provided at the lower end of the mobile terminal 10 or the like. The speaker 14 is an audio output device provided on the surface of the mobile terminal 10 or the like. The communication unit 15 is an interface unit for communicating with another device via a wireless communication network.

The storage unit 16 is a storage device including a hard disk device, a non-volatile memory, and the like. The storage unit 16 stores biometric information 16a such as a user's face image acquired by the camera 12 or a face image of an identity verification document captured by the camera 12, an authentication allowable condition 16b, and a registration password 16c.

The control unit 17 is a control unit that controls the mobile terminal 10 as a whole, and has a registration processing unit 17a. Actually, the process is executed by loading the program corresponding to the registration processing unit 17a into the CPU (Central Processing Unit) and executing the program.

The registration processing unit 17a performs a process in which the user registers the registered biometric information 24a, the authentication allowable condition 24c, and the registration password 24e in the authentication device 20.

<Internal configuration of authentication device 20>
Next, the internal configuration of the authentication device 20 shown in FIG. 1 will be described. FIG. 3 is a block diagram showing an internal configuration of the authentication device 20 shown in FIG. As shown in FIG. 3, the authentication device 20 is connected to the display unit 21 and the input unit 22, and has a communication unit 23, a storage unit 24, and a control unit 25.

The display unit 21 is a liquid crystal panel, a display device, or the like. The input unit 22 is a keyboard, a mouse, or the like. The communication unit 23 is an interface unit for communicating with other devices via the Internet or the like.

The storage unit 24 is a storage device such as a hard disk device or a non-volatile memory, and stores registered biometric information 24a, acquired biometric information 24b, authentication allowable condition 24c, condition correspondence information 24d, registered password 24e, input password 24f, and authentication result 24g. Remember.

The registered biometric information 24a, the authentication allowable condition 24c, and the registered password 24e are data sent from the user's mobile terminal 10. Further, the acquired biometric information 24b, the condition correspondence information 24d, and the input password 24f are data corresponding to the acquired biometric information 46a, the condition correspondence information 46b, and the input password 46c sent from the payment terminal 40.

The control unit 25 is a control unit that controls the entire authentication device 20, and includes a registration processing unit 25a, an authentication processing unit 25b, and an authentication side biometric information acquisition unit 25c. Actually, the process is executed by loading and executing the program corresponding to the registration processing unit 25a, the authentication processing unit 25b, and the authentication side biometric information acquisition unit 25c into the CPU.

The registration processing unit 25a performs registration processing of the registered biometric information 24a, the authentication allowable condition 24c, and the registration password 24e sent from the mobile terminal 10.

The authentication processing unit 25b collates the registered biometric information 24a with the acquired biometric information 24b, and the authentication of the biometric information is valid. The condition correspondence information 46b satisfies the authentication allowable condition 24c, and the registration password 24e and the input password 46c are used. Only if they match, the authentication result is judged to be valid.

The authentication side biometric information acquisition unit 25c performs a process of indirectly acquiring the acquired biometric information 24b from the payment terminal 40.

FIG. 4 is a diagram showing an example of the authentication allowable condition 24c. As shown in FIG. 4, the authentication allowable condition 24c has items of a usage area, a usage facility, a service type, a usage time, and a usage amount for each user ID, and at least one horizontal attribute is registered in advance. In FIG. 4, the usage area is set to "Tokyo", the usage time is set to "08 (hour) to 20 (hour)", and the usage amount is set to "10,000 yen or less" for the user ID "A102001". There is. Further, for the user ID "A103050", the usage area is set to "a radius of 1 km from the point A" and the service type is set to "food". Further, the facility used is set to the "A-series convenience store" for the user ID "A104010". The registered content of the authentication allowable condition 24c can be changed and set at any time from the mobile terminal 10 or the like. For example, a user with a user ID "A102001" can change the usage area "Tokyo" to "Hokkaido" when he / she has a business trip to Hokkaido.

<Internal configuration of payment terminal 40>
Next, the internal configuration of the payment terminal 40 shown in FIG. 1 will be described. FIG. 5 is a block diagram showing an internal configuration of the payment terminal 40 shown in FIG. As shown in FIG. 5, the payment terminal 40 is connected to an operation display unit 41, a camera 42, a microphone 43, and a speaker 44, and has a communication unit 45, a storage unit 46, and a control unit 47. The payment terminal 40 has a function as a biometric information acquisition unit that acquires biometric information for acquiring biometric information acquired from the user.

The operation display unit 41 is an input / output device such as a liquid crystal touch panel. The camera 42 is an image pickup device provided on the back surface of the payment terminal 40 or the like. The microphone 43 is a voice input device provided at the lower end of the payment terminal 40 or the like. The speaker 44 is an audio output device provided on the surface of the payment terminal 40 or the like. The communication unit 45 is an interface unit for communicating with another device via a wireless communication network.

The storage unit 46 is a storage device such as a hard disk device or a non-volatile memory, and stores acquired biometric information 46a and condition correspondence information 46b.

The control unit 47 is a control unit that controls the payment terminal 40 as a whole, and has a payment processing unit 47a. Actually, the process is executed by loading the program corresponding to the payment processing unit 47a into the CPU and executing it.

When making a credit card payment, the payment processing unit 47a applies for payment to the payment server 30, and also authenticates information for authentication processing for this payment, that is, acquired biometric information 46a, condition correspondence information 46b, and input password 46c. Send to 20.

<Example of operation input when registering biometric information registered by mobile terminal 10>
FIG. 6 is a diagram showing an operation input example at the time of registration of registered biometric information and the like by the mobile terminal 10. First, as shown in FIG. 6A, the operation user information registration screen is displayed. Registration information includes address, name, age, telephone number, e-mail address, secret question, and the like. Here, when the OK button is pressed, the registration content confirmation screen shown in FIG. 6B is displayed. Here, when the OK button is pressed, the face information registration screen shown in FIG. 6 (c) is displayed. On this face information registration screen, the face information captured by the camera 42 is displayed. Here, when the OK button is pressed, the face information which is the biometric information 16a corresponding to the registered biometric information 24a is stored, and the password registration screen shown in FIG. 6D is displayed. When the 4-digit password is input on the password registration screen and the OK button is pressed, the password is stored as the registration password 16c, and the authentication acceptance condition registration screen shown in FIG. 6 (e) is displayed. On the registration screen of FIG. 6 (e), it is possible to specify the "use area", the "service type", and the "use amount". Here, when each designated input is completed, it is stored as the authentication allowable condition 16b, and when the OK button is pressed, the registration confirmation screen is displayed. Here, when the confirmation button and the consent button are pressed, the user information, the biometric information 16a, the authentication allowable condition 16b, and the registration password 16c stored in the storage unit 16 are transmitted to the authentication device 20 and registered.

<Authentication processing by the authentication device 20>
FIG. 7 is a flowchart showing an authentication processing procedure by the authentication device 20. As shown in FIG. 7, first, the authentication processing unit 25b acquires the acquired biometric information 24b stored in the storage unit 24 (step S101). After that, the authentication processing unit 25b refers to and collates the plurality of registered biometric information 24a, and determines whether or not one user has been authenticated (step S102). If one user cannot be authenticated (step S102: No), the payment server 30 is notified that the authentication is not permitted (step S108), and this process is terminated.

On the other hand, when one user can be authenticated (step S102: Yes), the condition correspondence information 24d stored in the storage unit 24 is further acquired (step S103). Then, it is determined whether or not the condition correspondence information 24d satisfies the authentication allowable condition 24c (step S104). If the condition correspondence information 24d does not satisfy the authentication allowable condition 24c (step S104: No), the payment server 30 is notified of the authentication disapproval (step S108), and this process is terminated.

If the condition correspondence information 24d satisfies the authentication allowable condition 24c (step S104: Yes), the input password 24f stored in the storage unit 24 is further acquired (step S105). Then, it is determined whether or not the input password 24f and the registration password 24e match (step S106). If the input password 24f and the registration password 24e do not match (step S106: No), the payment server 30 is notified of the authentication disapproval (step S108), and this process ends.

On the other hand, if the input password 24f and the registration password 24e match (step S106: Yes), the payment server 30 is notified of the authentication permission (step S107), and this process ends.

As described above, since the authentication system according to the present embodiment restricts the use of biometric authentication by using the authentication acceptance condition set by the user, it is possible to prevent erroneous authentication of biometric authentication. In this case, erroneous authentication can be effectively prevented with a simple configuration without improving the biometric authentication accuracy and the biometric authentication speed. As described above, in the present embodiment, password authentication is performed, but in the present invention, password authentication is not essential, and the password authentication process may be deleted. Further, password authentication may be performed periodically instead of being performed for each authentication.

<Modification 1>
In the above embodiment, the acquired biometric information is acquired by using the payment terminal 40 arranged in a store or the like and the authentication application is made. However, in the present modification 1, the authentication application is made to the user's mobile terminal 10. The mobile terminal 10 is used as the payment terminal 40 by having a function, for example, a function of a biological information acquisition unit. That is, in the present modification 1, the mobile terminal 10 is used as a mobile payment terminal 40.

<Modification 2>
As a further weighted condition in the above embodiment, when one user is authenticated and specified by the authentication process, a notification requesting payment use permission is sent to the mobile terminal registered by the user, and approval from the user is requested. You may do so. Alternatively, if one user is authenticated and identified by the authentication process, a notification requesting payment use permission is sent by SMS (Short Message Service) or email registered by the user, and approval from the user is requested. You may.

<Modification 3>
In the third modification, the user sets in advance the relationship between the biometric image of the request instruction and the biometric image different from the request instruction, and the authentication permissible condition is that a different biometric image is acquired. For example, in the case of face information, when the request instruction for face information is "diagonal right side image", "the diagonal left side image is regarded as a legitimate face image and authentication processing is permitted. In the case of fingerprint information, fingerprint information" When the request instruction of is "thumb", the fingerprint information of "index finger" is regarded as legitimate fingerprint information, and the authentication process is permitted.

In the above embodiment, password authentication is performed in addition to the biometric authentication process. The password authentication of the embodiment is one authentication process, and in the embodiment, two authentication processes are performed. Not limited to this embodiment, an authentication process may be further added. The added authentication process may be another biometric authentication process.

Further, each configuration shown in the above-described embodiment and each modification is a schematic function, and does not necessarily have to be physically illustrated. That is, the form of distribution / integration of each device is not limited to the one shown in the figure, and all or part of them may be functionally or physically distributed / integrated in any unit according to various loads and usage conditions. Can be configured.

The authentication system, authentication device, and authentication method according to the present invention are suitable for preventing fraud such as impersonation of a person in biometric information authentication with a simple configuration.

10 Mobile terminal 11,41 Operation display unit 12,42 Camera 13,43 Microphone 14,44 Speaker 15,23,45 Communication unit 16,24,46 Storage unit 16a Biometric information 16b Authentication tolerance 16c Registration password 17,25,47 Control unit 17a, 25a Registration processing unit 20 Authentication device 21 Display unit 22 Input unit 24a Registered biometric information 24b, 46a Acquired biometric information 24c Authentication allowable conditions 24d, 46b Condition correspondence information 24e Registration password 24f, 46c Input password 25b Authentication processing unit 25c Authentication side biometric information acquisition unit 24g Authentication result 30 Payment server 40 Payment terminal 47a Payment processing unit N network

Claims (11)

A registered biometric information storage unit that stores registered biometric information registered in advance by multiple users,
An authentication condition storage unit that stores authentication acceptance conditions that allow authentication processing corresponding to each of the plurality of users, and an authentication condition storage unit.
The biometric information acquisition unit that acquires biometric information from users,
An authentication processing unit that authenticates one person from the plurality of users based on the stored registered biometric information and the acquired acquired biometric information, and permits the authentication when the authentication allowable conditions are satisfied. An authentication system characterized by being equipped with. A plurality of the biometric information acquisition units are set corresponding to a plurality of usage areas.
The authentication system according to claim 1, wherein the authentication acceptance condition sets whether or not the authentication process is permitted according to the usage area in which the biometric information acquisition unit is installed. The authentication system according to claim 2, wherein the use area to which the authentication process is permitted under the authentication allowable condition is set as an allowable value of a distance from a predetermined point. A plurality of the biometric information acquisition units are set corresponding to a plurality of usage areas.
The authentication system according to claim 1, wherein the authentication acceptance condition sets whether or not the authentication process is permitted according to the facility in which the biometric information acquisition unit is installed. A plurality of the biometric information acquisition units are set corresponding to a plurality of usage areas.
The authentication system according to claim 1, wherein the authentication acceptance condition sets whether or not authentication processing is permitted according to the service type in the facility where the biometric information acquisition unit is installed. The authentication system according to any one of claims 1 to 5, wherein the authentication acceptance condition sets whether or not to allow authentication processing according to time. The authentication system according to any one of claims 1 to 6, wherein the authentication acceptance condition sets whether or not the authentication process is permitted according to the usage amount. The authentication system according to any one of claims 1 to 7, wherein the registered biometric information storage unit sets the authentication allowable condition in response to an input by each of the plurality of users. The authentication system according to any one of claims 1 to 8, wherein the authentication processing unit executes at least two types of authentication processes and permits authentication when all the authentication processes are valid. .. A registered biometric information storage unit that stores registered biometric information registered in advance by multiple users,
An authentication condition storage unit that stores authentication acceptance conditions that allow authentication processing corresponding to each of the plurality of users, and an authentication condition storage unit.
The authentication side biometric information acquisition unit that acquires biometric information from the user,
An authentication processing unit that authenticates one person from the plurality of users based on the stored registered biometric information and the acquired acquired biometric information, and permits the authentication when the authentication allowable conditions are satisfied. An authentication device characterized by being equipped with. A registered biometric information storage step that stores registered biometric information registered in advance by multiple users,
An authentication condition storage step for storing authentication acceptance conditions that allow authentication processing corresponding to each of the plurality of users, and an authentication condition storage step.
The biometric information acquisition step to acquire biometric information from the user,
With the authentication processing step of authenticating one person from the plurality of users based on the stored registered biometric information and the acquired acquired biometric information and permitting the authentication when the authentication allowable condition is satisfied. An authentication method characterized by including.

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