WO2024100891A1 - Information processing device, information processing method, and recording medium - Google Patents

Abstract

An information processing device 1 comprises an acquisition unit 11 that acquires living body information relating to a subject, a determination unit 12 that uses the acquired living body information relating to the subject to determine whether the subject is conducting impersonation, and a control unit 13 that controls the determination according to situation information indicating a situation in which the living body information was acquired from the subject.

Description

Information processing device, information processing method, and recording medium

This disclosure relates to the technical fields of information processing devices, information processing methods, and recording media.

Patent Literature 1 describes an authentication control device capable of reducing the decrease in user convenience in multimodal authentication. The authentication control device includes a biometric information acquisition means for acquiring first biometric information and second biometric information of a predetermined user, an authentication control means for controlling at least one of a first biometric authentication using the first biometric information and a second biometric authentication using the second biometric information, and a determination means for determining whether or not to use the result of the other biometric authentication when at least one of the first biometric authentication and the second biometric authentication is successful.
Patent document 2 describes a technology in which a target iris image, which is the iris image to be processed, is obtained, and one or more similar registered iris images that are similar to the target iris image are searched for from a registered iris image, and if the person corresponding to the target iris image and the person corresponding to the similar registered iris image are different people, the target iris image and the similar registered iris image are determined to be iris images of color contact lenses.
Patent Document 3 describes a technology in which an imaging unit captures a first image (visible light image) by irradiating a subject with light in a first wavelength range and a second image (IR image) by irradiating the subject with light in a second wavelength range, and determines whether the subject is a living body or not based on feature amounts obtained from the first image and feature amounts obtained from the second image, thereby determining whether or not the subject is an identifiable living body regardless of the image quality of the captured images.
Patent Document 4 describes a technology that accepts a facial image, determines whether the person depicted in the facial image is unsuitable for obtaining iris data based on the facial image, and if it is determined that the person is unsuitable for obtaining iris data, outputs information based on the determination that the person is unsuitable for obtaining iris data, thereby reducing unnecessary actions and unnecessary processing that may occur in scenes where iris data is being obtained.
Patent Document 5 describes an authentication system using multiple types of authentication. The terminal device transmits a user's face image, the user's voice, the position of the terminal device, and the like as authentication data to the server device. The server device performs individual authentication such as face authentication, voiceprint authentication, and position validity verification using the authentication data received from the terminal device. The server device adds up multiple authentication scores obtained by the individual authentications with weighting, calculates a total score, and permits high security operations if the total score exceeds a first threshold. If the total score is equal to or less than the first threshold and exceeds a second threshold, permits operations limited to low security operations. If additional authentication data is received from the terminal device and additional authentication is performed, the server device further uses the authentication score of the additional authentication to calculate a total score, and permits high security operations if the total score exceeds a first threshold.
Patent document 6 describes a technology that recognizes the surrounding conditions of a biometric measurement subject who appears in an image captured by an imaging means for capturing the biometric measurement subject, processes the biometric information of the biometric measurement subject based on the recognition results, and measures the biometric information of the biometric measurement subject while taking into account fluctuations due to the surrounding conditions of the biometric measurement subject.

International Publication No. 2022/044274 International Publication No. 2022/014001 JP 2017-191374 A International Publication No. 2020/066776 JP 2020-166597 A JP 2011-244841 A

The objective of this disclosure is to provide an information processing device, an information processing method, and a recording medium that aim to improve upon the technology described in prior art documents.

One aspect of the information processing device includes an acquisition means for acquiring biometric information of a target, a determination means for determining whether the target is impersonating another person using the biometric information of the target, and a control means for controlling the determination of the determination means in response to situation information indicating the situation when the biometric information was acquired from the target.

One aspect of the information processing method involves acquiring biometric information of a target, using the biometric information of the target to determine whether the target is impersonating another person, and controlling the determination in response to situational information indicating the situation when the biometric information was acquired from the target.

In one embodiment of the recording medium, a computer program is recorded to cause a computer to execute an information processing method that acquires biometric information of a target, uses the biometric information of the target to determine whether the target is impersonating another person, and controls the determination in response to situational information that indicates the situation when the biometric information was acquired from the target.

FIG. 1 is a block diagram showing the configuration of an information processing apparatus according to the first embodiment. FIG. 2 is a block diagram showing the configuration of an information processing device according to the second embodiment. FIG. 3 is a flowchart showing the flow of information processing operations of the information processing device in the second embodiment. FIG. 4 is a block diagram showing the configuration of an information processing apparatus according to the third embodiment. FIG. 5 is a block diagram showing the configuration of an information processing apparatus according to the fourth embodiment. FIG. 6 is a flowchart showing the flow of information processing operations of the information processing device according to the fourth embodiment. FIG. 7 is a block diagram showing the configuration of an information processing device according to the fifth embodiment. FIG. 8 is a flowchart showing the flow of information processing operations of the information processing device according to the fifth embodiment. FIG. 9 is a block diagram showing the configuration of an information processing device according to the sixth embodiment. FIG. 10 is a flowchart showing the flow of information processing operations of the information processing device in the sixth embodiment. FIG. 11 is a block diagram showing the configuration of an information processing device according to the seventh embodiment. FIG. 12 is a flowchart showing the flow of information processing operations of the information processing device in the seventh embodiment.

Hereinafter, embodiments of an information processing device, an information processing method, and a recording medium will be described with reference to the drawings.
[1: First embodiment]

A first embodiment of an information processing device, an information processing method, and a recording medium will be described below. In the following, the first embodiment of the information processing device, the information processing method, and the recording medium will be described using an information processing device 1 to which the first embodiment of the information processing device, the information processing method, and the recording medium is applied.
[1-1: Configuration of information processing device 1]

FIG. 1 is a block diagram showing the configuration of an information processing device 1 in the first embodiment. As shown in FIG. 1, the information processing device 1 includes an acquisition unit 11, a determination unit 12, and a control unit 13.

The acquisition unit 11 acquires biometric information of a target. The determination unit 12 uses the biometric information of the target to determine whether the target is impersonating another person. The control unit 13 controls the determination in accordance with situation information indicating the situation when the biometric information was acquired from the target.
[1-2: Technical Effects of Information Processing Device 1]

The information processing device 1 in the first embodiment uses the target's biometric information to control the determination of whether the target is impersonating someone else, depending on situational information indicating the situation when the biometric information was obtained from the target, and can therefore perform appropriate impersonation determination.
[2: Second embodiment]

Next, a second embodiment of the information processing device, information processing method, and recording medium will be described. Below, the second embodiment of the information processing device, information processing method, and recording medium will be described using an information processing device 2 to which the second embodiment of the information processing device, information processing method, and recording medium is applied.

The information processing device 2 may be a device capable of performing biometric authentication of the subject. The information processing device 2 may perform a matching operation using biometric information, and may also be a device capable of determining whether the subject is impersonating another person using the biometric information, and authenticating the subject. The information processing device 2 may determine whether the biometric information used in the matching operation is biometric information acquired from a living body, and determine whether the subject may be authenticated. The case where the biometric information is not acquired from a living body corresponds to, for example, the case where the information is acquired from a counterfeit of a person who the subject is impersonating. The counterfeit of a person may include, for example, a photograph in which a person is captured, an object such as a display on which a person is displayed, and a three-dimensional object such as a doll imitating a person, a face mask made of silicone, etc. When the biometric information is information that can be acquired from a face area including the face of the subject, the information acquired from an image of the counterfeit of the person corresponds to the case where the information is not acquired from a living body. In addition, when the biometric information is an image from the iris region including the subject's iris, information obtained from an image of a forgery of the above-mentioned person, or information obtained by imaging the iris of a subject wearing an artificial eye, falls under the case where the biometric information is not obtained from a living body.
[2-1: Configuration of information processing device 2]

FIG. 2 is a block diagram showing the configuration of the information processing device 2 in the second embodiment. As shown in FIG. 2, the information processing device 2 includes a calculation device 21 and a storage device 22. Furthermore, the information processing device 2 may include a communication device 23, an input device 24, and an output device 25. However, the information processing device 2 does not have to include at least one of the communication device 23, the input device 24, and the output device 25. The calculation device 21, the storage device 22, the communication device 23, the input device 24, and the output device 25 may be connected via a data bus 26.

The arithmetic device 21 includes, for example, at least one of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and an FPGA (Field Programmable Gate Array). The arithmetic device 21 reads a computer program. For example, the arithmetic device 21 may read a computer program stored in the storage device 22. For example, the arithmetic device 21 may read a computer program stored in a computer-readable and non-transient recording medium using a recording medium reading device (e.g., an input device 24 described later) not shown in the figure that is provided in the information processing device 2. The arithmetic device 21 may acquire (i.e., download or read) a computer program from a device (not shown) located outside the information processing device 2 via the communication device 23 (or other communication device). The arithmetic device 21 executes the read computer program. As a result, a logical functional block for executing the operation to be performed by the information processing device 2 is realized within the calculation device 21. In other words, the calculation device 21 can function as a controller for realizing a logical functional block for executing the operation (in other words, processing) to be performed by the information processing device 2.

FIG. 2 shows an example of logical functional blocks realized within the arithmetic device 21 to execute information processing operations. As shown in FIG. 2, realized within the arithmetic device 21 are an acquisition unit 211, which is a specific example of an "acquisition means" described in the appendix described below, a determination unit 212, which is a specific example of a "determination means" described in the appendix described below, and a control unit 213, which is a specific example of a "control means" described in the appendix described below. The control unit 213 may have a selection unit 2131. Details of the operations of the acquisition unit 211, determination unit 212, and control unit 213 will be described later with reference to FIG. 3.

The storage device 22 can store desired data. For example, the storage device 22 may temporarily store a computer program executed by the arithmetic device 21. The storage device 22 may temporarily store data that is temporarily used by the arithmetic device 21 when the arithmetic device 21 is executing a computer program. The storage device 22 may store data that the information processing device 2 stores for a long period of time. The storage device 22 may include at least one of a RAM (Random Access Memory), a ROM (Read Only Memory), a hard disk device, a magneto-optical disk device, an SSD (Solid State Drive), and a disk array device. In other words, the storage device 22 may include a non-temporary recording medium.

The communication device 23 is capable of communicating with devices external to the information processing device 2 via a communication network (not shown). The communication device 23 may be a communication interface based on standards such as Ethernet (registered trademark), Wi-Fi (registered trademark), Bluetooth (registered trademark), and USB (Universal Serial Bus).

The input device 24 is a device that accepts information input to the information processing device 2 from outside the information processing device 2. For example, the input device 24 may include an operating device (e.g., at least one of a keyboard, a mouse, and a touch panel) that can be operated by an operator of the information processing device 2. For example, the input device 24 may include a reading device that can read information recorded as data on a recording medium that can be attached externally to the information processing device 2.

The output device 25 is a device that outputs information to the outside of the information processing device 2. For example, the output device 25 may output information as an image. That is, the output device 25 may include a display device (so-called a display) capable of displaying an image showing the information to be output. For example, the output device 25 may output information as sound. That is, the output device 25 may include an audio device (so-called a speaker) capable of outputting sound. For example, the output device 25 may output information on paper. That is, the output device 25 may include a printing device (so-called a printer) capable of printing desired information on paper.
[2-2: Information Processing Operation Performed by Information Processing Device 2]

The information processing operation performed by the information processing device 2 in the second embodiment will be described with reference to FIG. 3. FIG. 3 is a flowchart showing the flow of the information processing operation performed by the information processing device 2 in the second embodiment.

As shown in FIG. 3, the acquisition unit 211 acquires biometric information of the subject (step S20). The biometric information of the subject may be information that can be acquired from an image. The biometric information of the subject may be an image of the subject's facial area. In this case, the acquisition unit 211 may acquire an image from a visible light camera that images the subject, and acquire a facial image of the subject's facial area from the image. Alternatively, the acquisition unit 211 may acquire an image from a near-infrared camera that images the subject, and acquire a facial image of the subject's facial area from the image.

The subject's biometric information may be an image of the subject's eye region including the iris. In this case, the acquisition unit 211 may acquire an image from a near-infrared camera that images the subject, and acquire an iris image of the subject's iris region from the image. Alternatively, the acquisition unit 211 may acquire an image from a visible light camera that images the subject, and acquire an iris image of the subject's iris region from the image.

The subject's biometric information may be information indicating the subject's fingerprint. In this case, the acquisition unit 211 may acquire the fingerprint information from a fingerprint scanner. The subject's biometric information may be the subject's ear acoustic information. In this case, the acquisition unit 211 may acquire the ear acoustic information from an earphone-type authentication device. The earphone-type authentication device may be a device that sends a test sound to the ear hole in the direction of the ear canal and acquires the sound reflected from the test sound.

The acquisition unit 211 may acquire, together with the subject's biometric information, situation information S indicating the situation when the biometric information was acquired from the subject.
[Situation Information S]

The situation information S may include, for example, information indicating the presence of people around the subject. The situation information S may also include information indicating the presence of a specific person around the subject. The situation information S may include information indicating the business form of the facility where the subject is located. If the subject is making a payment, the situation information S may include information indicating the payment amount. The situation information S may also include information indicating whether the subject is a person who requires impersonation determination. The impersonation determination may be a liveness determination that determines whether a living person is actually being photographed.

The situation information S may also be information generated based on biometric information. In this case, the situation information S may include information indicating an article worn by the subject. The article may be, for example, a patterned contact lens. If it is detected based on the iris image that the subject is wearing a patterned contact lens, the situation information S may include information indicating that the subject is wearing a patterned contact lens.

The subject may also be in a situation where he or she is to be authenticated. In this case, the situation information S may include information indicating a matching operation to be performed on the subject. The situation information S may also include information indicating the matching result of the matching operation performed on the subject.

The selection unit 2131 performs a selection operation to select whether or not to perform spoofing determination and, if so, which liveness method to use, according to situation information S indicating the situation when biometric information is acquired from the subject (step S21). The selection unit 2131 may select the optimal liveness method according to the situation information S.
[Selection behavior according to surrounding people]

The selection unit 2131 may perform a selection operation according to the situation information S indicating the presence of people around the target, for example. In this case, the selection unit 2131 may perform a selection operation according to the number of people around the target. The selection unit 2131 may determine the congestion state of the facility where the target is located according to the number of people around the target. The selection unit 2131 may select not to perform the impersonation determination when it is determined that there are a predetermined number of people or more around the target and the facility is crowded. When there are many people around the target, it is difficult to impersonate someone other than a living body, so it may be determined that the target is not impersonating someone. Alternatively, even if there are not a predetermined number of people or more around the target, if it is determined that a queue has formed, it may be selected not to perform the impersonation determination. In a situation where it is better to avoid making the target wait, the selection unit 2131 may select not to perform the impersonation determination even if there are not a predetermined number of people or more around the target.

The selection unit 2131 may also identify people around the subject based on situation information S that indicates the presence status of people around the subject. In this case, the selection unit 2131 may perform a selection operation depending on the identified people. For example, the selection unit 2131 may compare and identify people around the subject, and determine whether or not they are people who perform a specified job, such as facility staff or security guard. If the people around the subject are people who perform a specified job, the selection unit 2131 may choose not to perform an impersonation determination.

The selection unit 2131 may also perform a selection operation according to situation information S that indicates the business status of the facility where the target person is located. In this case, the situation information S may include information indicating whether the facility is staffed or unstaffed as a parameter according to the location. The situation information S may also include information indicating whether the location in the facility where the payment operation is performed is managed by a person as a parameter according to the location.

Alternatively, the selection unit 2131 may determine the business type of the facility in which the subject is located based on the situation information S that indicates the presence of people around the subject. The selection unit 2131 may determine whether the subject is in an unmanned facility depending on the number of people around the subject.

The selection unit 2131 may select to perform impersonation determination when it is determined that the subject is in an unmanned facility that is open for business. Furthermore, the selection unit 2131 may select to perform impersonation determination when it is determined that the subject is in an unmanned facility that is open for business and the facility is not crowded. When there are few people around the subject, particularly when there are no staff members at the facility, it is relatively easy to impersonate someone, so it may be determined that the subject may be impersonating someone.
[Selection behavior according to payment amount]

The selection unit 2131 may perform a selection operation according to the status information S indicating the payment amount of the target person. In this case, the selection unit 2131 may select not to perform the spoofing determination if the payment amount of the target person is less than a predetermined amount. The selection unit 2131 may select to perform the spoofing determination if the payment amount of the target person is more than the predetermined amount.
[Selective action according to the subject's clothing]

The selection unit 2131 may perform a selection operation according to the situation information S indicating what the subject is wearing. For example, if the situation information S indicates that the subject is wearing patterned contact lenses, the selection unit 2131 may select to perform an impersonation determination. When patterned contact lenses are worn, the subject may be determined to be the person in question through iris matching, even though he or she is a different person. For this reason, when the subject is wearing patterned contact lenses, an impersonation determination may be performed to determine that the subject has not been impersonated.

The selection unit 2131 can select a liveness method that can take time to perform a more accurate determination when it is acceptable to spend time on it. Also, the selection unit 2131 can select a liveness method that can be performed in a relatively short time when spoofing determination is not required, such as when the matching result of the biometric information is better than a predetermined value. The selection unit 2131 can select an appropriate liveness method from a plurality of liveness methods according to the environment around the subject.
[When spoofing check is not required]

For example, depending on the situation, such as when making a payment or logging in to a social networking service, the subject may accept that the spoofing judgment is not performed. In this case, the selection unit 2131 may perform a selection operation according to the situation information S indicating whether the subject needs the spoofing judgment. The situation information S indicating whether the subject needs the spoofing judgment may be registered in advance. In a situation where the information processing device 2 performs an information processing operation, the subject may input information indicating that the spoofing judgment is not required to be performed to the information processing device 2 via the input device 24. The selection unit 2131 may select not to perform the spoofing judgment according to the situation information S indicating that the subject does not need the spoofing judgment.
[Liveness method used in spoofing detection]

The determination unit 212 can perform spoofing determination using any one of one or more liveness methods. For example, the liveness method may include a liveness method that requires a large amount of time and/or effort from the subject. A liveness method that requires a large amount of time and/or effort from the subject may be called a high-stress liveness method. A high-stress liveness method may include, for example, a liveness method that involves the subject's movements. An example of a liveness method that involves the subject's movements is a liveness method that prompts the subject to blink, shake their head, etc., and analyzes the movements. Other examples include a liveness method that detects changes in the subject's line of sight, and a liveness method that detects changes in the subject's iris reflex.

The liveness technique may also include a liveness technique that applies a stimulus to a subject and obtains the subject's response to the stimulus. The response may include the response of the subject's eyes. By using this liveness technique, it is possible to determine whether or not an impersonator is using a prosthetic eye.

　Furthermore, the liveness technique may include a liveness technique that requires less time and/or less effort from the subject. A liveness technique that requires less time and/or less effort from the subject may be referred to as a low-burden liveness technique. A low-burden liveness technique may include a liveness technique that does not involve the subject's movements. An example of a liveness technique that does not involve the subject's movements is a liveness technique that shines light on the subject and analyzes its reflection, shadow, etc. Such a liveness technique may be referred to as "lighting liveness." The lighting may be lighting that uses visible light. The lighting may be lighting that uses near-infrared light. The temperature distribution within the image may be analyzed. The brightness difference within the image may be analyzed.

The control unit 213 may select liveness methods in the order of lightest load liveness method to heaviest load liveness method, and perform spoofing determination.

The control unit 213 judges whether the selection unit 2131 has selected to perform an impersonation judgment for judging whether the target person is impersonating another person (step S22). If the selection unit 2131 has selected to perform an impersonation judgment (step S22: Yes), the control unit 213 controls the performance of the impersonation judgment according to the selection of the selection unit 2131. The judgment unit 212 performs an impersonation judgment under the control of the control unit 213 (step S23). The judgment unit 212 may be able to perform a strict impersonation judgment or a lenient impersonation judgment according to the situation information S.
[2-3: Technical Effects of Information Processing Device 2]

In identity authentication using images of a face, iris, etc., it is necessary to prevent fraudulent approval due to spoofing by presenting a photo, etc. On the other hand, the implementation of the spoofing judgment places a burden on the subject. There may be a trade-off between the burden on the subject and the security of the authentication. The information processing device 2 in the second embodiment has a plurality of liveness methods, and can determine whether or not to implement the spoofing judgment and the liveness method to be used for the spoofing judgment depending on the situation in which it is necessary to authenticate the subject. Since the liveness methods are used differently depending on the situation, an appropriate operation according to the situation information S can be performed. The information processing device 2 can appropriately determine whether or not to implement the spoofing judgment and select an appropriate liveness method, thereby achieving both reliability and usability of the authentication system.
[3: Third embodiment]

Next, a third embodiment of the information processing device, information processing method, and recording medium will be described. Below, the third embodiment of the information processing device, information processing method, and recording medium will be described using an information processing device 3 to which the third embodiment of the information processing device, information processing method, and recording medium is applied.

4 shows the configuration of the information processing device 3 in the third embodiment. In the third embodiment, the operation of the selection unit 3131 is different from that in the second embodiment. Other features of the information processing device 3 may be the same as other features of the information processing device 2 in the second embodiment. Therefore, in the following, the parts that differ from the embodiments already described will be described in detail, and the description of other overlapping parts will be omitted as appropriate.
[3-1: Information Processing Operation Performed by Information Processing Device 3]

In the third embodiment, a selection result by a selection operation according to situation information S indicating a situation when biometric information is acquired from a subject may be determined in advance. The selection unit 3131 may have a mechanism for outputting a selection result according to the situation information S when the situation information S is input.
[Realization by function F]

The selection unit 3131 may include a function F as exemplified in the following formula 1, which outputs an appropriate operation A when the situation information S is input. The operation A may include an operation A that does not perform spoofing determination, and an operation A that performs spoofing determination using any liveness method.
Action A = F (situation information S) ... (Equation 1)
[Realization by method table 321]

The selection unit 3131 may refer to the technique table 321 as a lookup table and output a selection result according to the situation information S. In the third embodiment, the technique table 321 may be realized in the storage device 22. However, the technique table 321 does not have to be realized in the storage device 22. The technique table 321 may store information that associates the situation information S with an action A. When the situation information S is input, the selection unit 3131 may refer to the technique table 321 and select an appropriate action A.
[3-2: Technical Effects of Information Processing Device 3]

The information processing device 3 in the third embodiment can select an appropriate operation according to situation information S that is determined in advance.
[4: Fourth embodiment]

Next, a fourth embodiment of the information processing device, the information processing method, and the recording medium will be described. In the following, the fourth embodiment of the information processing device, the information processing method, and the recording medium will be described using an information processing device 4 to which the fourth embodiment of the information processing device, the information processing method, and the recording medium is applied.
[4-1: Configuration of information processing device 4]

As shown in FIG. 5, the information processing device 4 in the fourth embodiment includes a calculation device 21 and a storage device 22, similar to the information processing device 2 in the second embodiment and the information processing device 3 in the third embodiment. Furthermore, the information processing device 4 in the fourth embodiment may include a communication device 23, an input device 24, and an output device 25, similar to the information processing device 2 in the second embodiment and the information processing device 3 in the third embodiment. However, the information processing device 4 may not include at least one of the communication device 23, the input device 24, and the output device 25. The information processing device 4 in the fourth embodiment differs from the information processing device 2 in the second embodiment and the information processing device 3 in the third embodiment in that the control unit 413 further includes a frequency determination unit 4132 and a numerical value determination unit 4133. Other features of the information processing device 4 may be the same as other features of the information processing device 2 in the second embodiment. For this reason, hereinafter, the parts that are different from the embodiments already described will be described in detail, and other overlapping parts will be appropriately omitted.
[4-2: Information Processing Operation Performed by Information Processing Device 4]

The information processing operation performed by the information processing device 4 in the fourth embodiment will be described with reference to FIG. 6. FIG. 6 is a flowchart showing the flow of the information processing operation performed by the information processing device 4 in the fourth embodiment.

As shown in FIG. 6, when the biometric information of the subject is acquired (step S20) and a selection operation is performed (step S21), the frequency determination unit 4132 determines the frequency of the determination for performing the spoofing determination according to the situation information S indicating the situation when the biometric information was acquired from the subject (step S40). In the fourth embodiment, the storage device 22 may be provided with a frequency table 422. The frequency table 422 may register the frequency of the determination in association with the situation information S. The frequency determination unit 4132 may determine the frequency of the determination by referring to the frequency table 422. The frequency of the determination may be a value of 0 or more and 1 or less. For example, the frequency determination unit 4132 may determine that the frequency of the determination is a high value in the case where it is preferable to perform the spoofing determination every time. Also, the frequency determination unit 4132 may determine that the frequency of the determination is a low value in the case where it is not necessary to perform the spoofing determination every time. Also, in the case where the frequency of the determination is not necessary to be taken into consideration, the frequency determination unit 4132 may determine that the frequency of the determination is "1".

For example, if the situation information S indicates a situation in which a liveness method with a heavy load should be used, the frequency determination unit 4132 may determine that the frequency of judgment is a high numerical value. In other words, since the situation requires a strong spoofing judgment, it may be determined that spoofing judgment should be performed frequently. Also, if the situation information S indicates a situation in which a liveness method with a light load should be used, the frequency determination unit 4132 may determine that the frequency of judgment is a low numerical value.

Alternatively, when the situation information S indicates a situation in which a liveness method with a light load should be used, the frequency determination unit 4132 may determine that the judgment implementation frequency is a high numerical value. In other words, since the load of spoofing judgment is light, it may be determined that spoofing judgment may be performed frequently. When the situation information S indicates a situation in which a liveness method with a heavy load should be used, the frequency determination unit 4132 may determine that the judgment implementation frequency is a low numerical value. Also,

The control unit 413 determines whether or not to perform an impersonation determination based on the selection of the selection unit 3131 and the frequency of determination (step S41).

The numerical value determination unit 4133 determines a numerical value regarding whether or not to perform spoofing detection. The numerical value determination unit 4133 randomly determines a numerical value from numerical values greater than or equal to 0 and less than or equal to 1. The numerical value determination unit 4133 may determine a numerical value by generating a random number.

The control unit 413 determines that an spoofing assessment will be performed if the selection unit 3131 selects to perform an spoofing assessment and the numerical value is equal to or less than the assessment implementation frequency. Even if the selection unit 3131 selects to perform an spoofing assessment, the control unit 413 determines that an spoofing assessment will not be performed if the numerical value exceeds the assessment implementation frequency. Furthermore, the control unit 413 determines that an spoofing assessment will not be performed if the selection unit 3131 selects not to perform an spoofing assessment.

The control unit 413 controls the implementation of the spoofing determination in accordance with the selection of the selection unit 3131. The determination unit 212 implements the spoofing determination under the control of the control unit 413 (step S23).
[4-3: Technical Effects of Information Processing Device 4]

The information processing device 4 in the fourth embodiment performs impersonation determination operations according to the situation at an appropriate frequency depending on the situation, thereby reducing the time and operational burden on the subject and the information processing device 4.
[5: Fifth embodiment]

Next, a fifth embodiment of the information processing device, the information processing method, and the recording medium will be described. Below, the fifth embodiment of the information processing device, the information processing method, and the recording medium will be described using an information processing device 5 to which the fifth embodiment of the information processing device, the information processing method, and the recording medium is applied.

In the fifth embodiment, the concept of cost is introduced. The cost may be the cost required for the spoofing judgment. The cost may be a concept including the time and effort required for the subject. The cost may be determined by the time required for the spoofing judgment, the load on the subject who is the subject of the spoofing judgment, and the load caused by the subject's actions. The cost may also be determined by taking into account the processing load on the information processing device 5 caused by performing the spoofing judgment.

For each liveness method, the cost required to perform spoofing determination using that liveness method may be set in advance. The heavier the load of a liveness method, the higher the cost may be set. Also, the lighter the load of a liveness method, the lower the cost may be set. For example, when spoofing determination is performed, the cost may be set higher than when spoofing determination is not performed. Also, a liveness method that involves the subject's movements may be set to a higher cost than a liveness method that does not involve the subject's movements.

In addition, a cost that may be applied to the spoofing determination may be set in advance for each piece of situation information S. That is, the cost may be determined according to the situation information S, and the spoofing determination to be performed may be determined according to the cost.
[5-1: Configuration of information processing device 5]

As shown in FIG. 7, the information processing device 5 in the fifth embodiment includes a calculation device 21 and a storage device 22, similar to the information processing device 2 in the second embodiment to the information processing device 4 in the fourth embodiment. Furthermore, the information processing device 5 in the fifth embodiment may include a communication device 23, an input device 24, and an output device 25, similar to the information processing device 2 in the second embodiment to the information processing device 4 in the fourth embodiment. However, the information processing device 5 may not include at least one of the communication device 23, the input device 24, and the output device 25. The information processing device 5 in the fifth embodiment differs from the information processing device 2 in the second embodiment to the information processing device 4 in the fourth embodiment in that the control unit 513 further includes a cost determination unit 5134. Other features of the information processing device 5 may be the same as at least one other feature of the information processing device 2 in the second embodiment to the information processing device 4 in the fourth embodiment. For this reason, hereinafter, the parts that are different from the respective embodiments already described will be described in detail, and the explanation of other overlapping parts will be omitted as appropriate.
[5-2: Information Processing Operation Performed by Information Processing Device 5]

The information processing operation performed by the information processing device 5 in the fifth embodiment will be described with reference to FIG. 8. FIG. 8 is a flowchart showing the flow of the information processing operation performed by the information processing device 5 in the fifth embodiment.

As shown in FIG. 8, the biometric information of the subject is acquired (step S20), and the cost determination unit 5134 determines the cost to be applied to the impersonation determination according to the situation information S indicating the situation when the biometric information was acquired from the subject (step S50).

The selection unit 5131 performs a selection operation according to the cost (step S51). If the cost is less than the cost threshold (step S51: No), the selection unit 5131 selects not to perform the spoofing determination (step S52). If the cost is equal to or greater than the cost threshold (step S51: Yes), the selection unit 5131 selects to perform the spoofing determination (step S53).

If it is selected to perform spoofing assessment, the selection unit 5131 selects a liveness method according to cost (step S54). In the fifth embodiment, the storage device 22 may include a method table 521. The method table 521 may register liveness methods in association with costs. The selection unit 5131 may select a liveness method by referring to the method table 521.

The liveness techniques may be ranked based on the cost associated with the liveness technique. The selection unit 5131 may select a liveness technique that satisfies both the need for spoofing detection and the acceptable cost according to the situation information S.

The cost determination unit 5134 may determine the cost according to the number of people around the target person. If there are a predetermined number or more people around the target person, the cost determination unit 5134 may determine that the cost is equal to the cost threshold. In this case, the selection unit 5131 may select not to perform the impersonation determination.

If the subject is in an unmanned facility that is open for business, the cost determination unit 5134 may determine that the cost is equal to or greater than the cost threshold. In this case, the selection unit 5131 may select to perform an impersonation determination.

The cost determination unit 5134 may determine the cost based on the payment amount of the target person.

If the cost determination unit 5134 detects that the subject is wearing patterned contact lenses, it may determine that the cost is equal to or greater than the cost threshold. In this case, the selection unit 5131 may select to perform an impersonation determination.

If the cost determination unit 5134 wishes to accurately determine whether or not the target person is impersonating someone else, it may determine the cost to be relatively high.

The frequency determination unit 5132 determines the frequency of performing the spoofing determination in accordance with the cost (step S40). In the fifth embodiment, the storage device 22 may include a frequency table 522. The frequency table 522 may register the frequency of performing the determination in association with the cost. The frequency determination unit 5132 may determine the frequency of performing the determination by referring to the frequency table 522. The cost and the frequency of performing the determination may be values that are correlated. That is, when the cost is determined to be high, the frequency determination unit 5132 may determine the frequency of performing the determination to be high. Also, when the cost is determined to be low, the frequency determination unit 5132 may determine the frequency of performing the determination to be low. Or, when the cost is determined to be high, the frequency determination unit 5132 may determine the frequency of performing the determination to be low. Also, when the cost is determined to be low, the frequency determination unit 5132 may determine the frequency of performing the determination to be high.

The control unit 513 determines whether or not to perform spoofing determination based on the selection of the selection unit 5131 and the frequency of determination (step S41). If spoofing determination is to be performed (step S41: Yes), the control unit 513 controls the implementation of the spoofing determination in accordance with the selection of the selection unit 5131. The determination unit 212 performs spoofing determination under the control of the control unit 513 (step S23).

In the fifth embodiment, the operations of steps S40 and S41 may be omitted.
[5-3: Technical Effects of Information Processing Device 5]

The information processing device 5 in the fifth embodiment can select a liveness method that satisfies both the necessity for spoofing judgment and the allowable cost according to the situation information S. The information processing device 5 judges the cost to be spent on spoofing judgment according to the situation information S and selects the spoofing judgment according to the cost, so that it can perform an appropriate spoofing judgment according to the situation information S. The information processing device 5 does not perform spoofing judgment when the cost is judged to be low, and performs spoofing judgment when the cost is judged to be high, so that it can perform an operation according to the situation information S.
[6: Sixth embodiment]

Next, a sixth embodiment of the information processing device, the information processing method, and the recording medium will be described. In the following, the sixth embodiment of the information processing device, the information processing method, and the recording medium will be described using an information processing device 6 to which the sixth embodiment of the information processing device, the information processing method, and the recording medium is applied.
[6-1: Configuration of information processing device 6]

As shown in FIG. 9, the information processing device 6 in the sixth embodiment includes a calculation device 21 and a storage device 22, similar to the information processing device 2 in the second embodiment to the information processing device 5 in the fifth embodiment. Furthermore, the information processing device 6 in the sixth embodiment may include a communication device 23, an input device 24, and an output device 25, similar to the information processing device 2 in the second embodiment to the information processing device 5 in the fifth embodiment. However, the information processing device 6 may not include at least one of the communication device 23, the input device 24, and the output device 25. The information processing device 6 in the sixth embodiment differs from the information processing device 2 in the second embodiment to the information processing device 5 in the fifth embodiment in that the calculation device 21 further includes a situation information generating unit 614 and the control unit 613 further includes a re-determination necessity determining unit 6135. Other features of the information processing device 6 may be the same as at least one other feature of the information processing device 2 in the second embodiment to the information processing device 5 in the fifth embodiment. For this reason, hereinafter, the parts that are different from the respective embodiments already described will be described in detail, and other overlapping parts will not be described as appropriate.
[6-2: Information Processing Operation Performed by Information Processing Device 6]

In the sixth embodiment, the status information S may include at least one of a status indicating the status when biometric information was acquired from the subject, a judgment status of the impersonation judgment, and a matching status of the matching operation of the subject using the biometric information. The status information S may be generated by the status information generating unit 614. The status information generating unit 614 may update the status information S based on the judgment status of the impersonation judgment and the matching status of the matching operation of the subject using the biometric information.

The information processing operation performed by the information processing device 6 in the sixth embodiment will be described with reference to FIG. 10. FIG. 10 is a flowchart showing the flow of the information processing operation performed by the information processing device 6 in the sixth embodiment.

As shown in FIG. 10, the biometric information of the subject is acquired (step S20), and the cost determination unit 6134 determines the cost of the spoofing determination according to the situation information S (step S62). The selection unit 6131 performs a selection operation according to the cost (step S51). If the cost is less than the cost threshold (step S51: No), the selection unit 6131 selects not to perform the spoofing determination (step S52). If the cost is equal to or greater than the cost threshold (step S51: Yes), the selection unit 6131 selects to perform the spoofing determination (step S53). If it is selected to perform the spoofing determination, the selection unit 6131 selects a liveness method according to the cost (step S63). The frequency determination unit 5132 determines the determination implementation frequency for performing the spoofing determination according to the cost (step S40). The control unit 613 determines whether or not to perform the spoofing determination according to the selection of the selection unit 6131 and the determination implementation frequency (step S41).

The control unit 613 controls the implementation of the spoofing determination (step S23). In the first step S23, the spoofing determination implemented may be an spoofing determination using a first liveness method having a first cost value. The first liveness method having a first cost value may be a liveness method that imposes a relatively light load on the subject. The liveness method that imposes a relatively light load on the subject may be, for example, lighting liveness.

The control unit 613 determines whether or not it is necessary to perform further spoofing assessment (step S60). The control unit 613 may determine that it is necessary to perform further spoofing assessment when the value indicating the result of the spoofing assessment using the first liveness method is lower than a predetermined value. In other words, the control unit 613 may determine that it is necessary to perform further spoofing assessment when there is a suspicion of spoofing.

If it is determined that further spoofing assessment needs to be performed (step S60: Yes), the situation information generation unit 614 updates the situation information S based on the assessment status of the spoofing assessment (step S61). The reassessment necessity determination unit 6135 reassess the cost according to the updated situation information S (step S62). In the second step S62, the reassessment necessity determination unit 6135 may determine the cost according to the updated situation information S to be higher than the cost corresponding to the first liveness method.

The selection unit 6131 selects a second liveness method corresponding to a higher cost than the cost corresponding to the first liveness method (step S63). When the value indicating the result of the spoofing determination using the first liveness method is lower than a predetermined value, the selection unit 6131 may select a second liveness method corresponding to a higher cost than the cost corresponding to the first liveness method. In other words, when it is necessary to perform further spoofing determination, the control unit 613 may control to perform spoofing determination using a second liveness method that imposes a relatively heavy load on the subject. The second liveness method that imposes a relatively heavy load on the subject may be a liveness method that involves the subject's actions.

The frequency of judgment may be updated in accordance with updates to the status information S and costs. On the other hand, in the sixth embodiment, the operations of steps S40 and S41 may be omitted.

In step S23 for the second time, the control unit 613 controls the execution of the spoofing determination using the first liveness method with the cost of the second value.
[6-3: Technical Effects of Information Processing Device 6]

In the information processing device 6 of the sixth embodiment, when it is determined that there is a possibility of spoofing by the spoofing determination, the second method corresponding to a higher cost than the cost corresponding to the first method already performed is selected, so that an appropriate spoofing determination can be performed and spoofing can be suppressed. The information processing device 6 can update the situation information S according to at least one of the determination status of the spoofing determination and the matching status of the matching operation of the subject using biometric information, so that the spoofing determination and the matching operation suitable for the situation can be performed. The information processing device 6 can improve the possibility of completing the matching operation and the spoofing determination at a relatively low cost, and when the matching operation cannot be completed, can adopt a costly liveness method to perform a strict spoofing determination.
[7: Seventh embodiment]

Next, a seventh embodiment of the information processing device, the information processing method, and the recording medium will be described. In the following, the seventh embodiment of the information processing device, the information processing method, and the recording medium will be described using an information processing device 7 to which the seventh embodiment of the information processing device, the information processing method, and the recording medium is applied.
[7-1: Configuration of information processing device 7]

11, the information processing device 7 in the seventh embodiment includes a calculation device 21 and a storage device 22, similar to the information processing device 2 in the second embodiment to the information processing device 6 in the sixth embodiment. Furthermore, the information processing device 7 in the seventh embodiment may include a communication device 23, an input device 24, and an output device 25, similar to the information processing device 2 in the second embodiment to the information processing device 6 in the sixth embodiment. However, the information processing device 7 may not include at least one of the communication device 23, the input device 24, and the output device 25. The information processing device 7 in the seventh embodiment differs from the information processing device 2 in the second embodiment to the information processing device 6 in the sixth embodiment in that the calculation device 21 further includes a matching unit 715 and an authentication unit 716, and the storage device 22 further includes an attribute table 723. Other features of the information processing device 7 may be the same as at least one other feature of the information processing device 2 in the second embodiment to the information processing device 6 in the sixth embodiment. For this reason, the following will provide a detailed explanation of the differences from the embodiments already described, and will omit explanations of other overlapping parts as appropriate.

In the seventh embodiment, the matching operation of the subject using biometric information includes face matching using a face image and iris matching using an iris image. The matching unit 715 may be capable of performing both face matching using a face image and iris matching using an iris image. The matching unit 715 may perform at least one of face matching using a face image and iris matching using an iris image.

Facial matching may be a matching operation using a facial image of the subject captured by a visible light camera.Facial matching may be a matching operation using a facial image of the subject captured by a near-infrared camera.Iris matching may be a matching operation using a facial image of the subject captured by a near-infrared camera.Iris matching may be a matching operation using a facial image of the subject captured by a visible light camera.

Attributes of the subject may be registered in attribute table 723. As attributes of the subject, the attribute table 723 may register the results of past spoofing determinations, the liveness method used in the spoofing determination, the results of matching biometric information, and authentication results including an authentication score, in association with the date and time of the determination. As attributes of the subject, the attribute table 723 may register information indicating factors that make it difficult to identify an individual, such as wearing patterned contact lenses.

In the seventh embodiment, the situation information generating unit 714 may generate the situation information S according to the attributes of the subject registered in the attribute table 723. The situation information generating unit 714 may generate the situation information S according to the attributes of the subject registered in the attribute table 723, as well as an image including biometric information and an image captured from an overhead view by a surveillance camera or the like.
[7-2: Information Processing Operation Performed by Information Processing Device 7]

The information processing operation performed by the information processing device 7 in the seventh embodiment will be described with reference to FIG. 12. FIG. 12 is a flowchart showing the flow of the information processing operation performed by the information processing device 7 in the seventh embodiment.

As shown in FIG. 12, biometric information of the subject is acquired (step S20), and the cost determination unit 7134 determines the cost to be applied to the spoofing determination according to the situation information S indicating the situation when the biometric information was acquired from the subject (step S73). The cost determination unit 7134 may determine the allowable cost according to the time that has passed since the previous spoofing determination was performed.

The selection unit 7131 performs a selection operation according to the cost (step S51). If the cost is less than the cost threshold (step S51: No), the selection unit 7131 selects not to perform the spoofing determination (step S52). If the cost is equal to or greater than the cost threshold (step S51: Yes), the selection unit 7131 selects to perform the spoofing determination (step S53). If it is selected to perform the spoofing determination, the selection unit 7131 selects a liveness method according to the cost (step S74). The selection unit 7131 may select a liveness method according to the time that has passed since the previous spoofing determination was performed.

The selection unit 7131 may select to perform spoofing determination using at least one of a face region included in an image captured by a visible light camera and a face region included in an image captured by a near-infrared camera. The selection unit 7131 may also select to perform spoofing determination using at least one of an iris region included in an image captured by a near-infrared camera and an iris region included in an image captured by a visible light camera.

The selection unit 7131 may perform the selection operation of the liveness method for spoofing determination related to face matching independently of the selection operation of the liveness method for spoofing determination related to iris matching. The items prioritized in the selection operation of the liveness method for spoofing determination related to face matching may be different from the items prioritized in the selection operation of the liveness method for spoofing determination related to iris matching.

If the selection unit 7131 selects to perform both impersonation determination based on face matching and impersonation determination based on iris matching, the selection unit 7131 may select a liveness method that encourages the subject to move their eyes.

If the selection unit 7131 selects not to perform spoofing determination, the matching unit 715 may increase the matching threshold for the matching operation of the subject using biometric information.

The frequency determination unit 4132 determines the frequency at which the spoofing determination is performed according to the cost (step S40). The control unit 613 determines whether or not to perform the spoofing determination according to the selection by the selection unit 6131 and the frequency at which the spoofing determination is performed (step S41). The control unit 713 controls the implementation of the spoofing determination (step S23).

The matching unit 715 performs a matching operation using the subject's biometric information (step S70). The matching operation may be at least one of a face matching operation and an iris matching operation.

The authentication unit 716 determines whether or not to authenticate the subject based on the result of the impersonation determination in step S23 and the result of the matching operation of the subject using the biometric information in step S70 (step S71).

If it is determined that the subject should not be authenticated (step S71: No), the situation information generation unit 714 updates the situation information S based on the result of the impersonation determination and the result of the matching operation of the subject using biometric information (step S72). A case in which the authentication unit 716 does not authenticate the subject may include at least one of a case in which the impersonation determination was not successful and a case in which the matching result indicates that the matching failed. A case in which the impersonation determination was not successful may be a case in which the impersonation determination was not performed or a case in which the determination result indicates that there is a possibility that the subject has been impersonated. A case in which there is a possibility that the subject has been impersonated may include a case in which the subject has been impersonated.

If the authentication unit 716 determines that the subject is not authenticated, the cost determination unit 7134 updates the cost (step S73). If the authentication unit 716 determines that the subject is not authenticated, the cost determination unit 7134 may determine the cost based on the updated status information S. If the authentication unit 716 determines that the subject is not authenticated, the cost determination unit 7134 may determine that the cost is to be high.

The selection unit 7131 performs a selection operation according to the updated cost (step S74). For example, if the determination is made after the spoofing determination has not been performed, the selection unit 7131 may select to perform the spoofing determination in step S51.

In step S73, the cost determination unit 7134 may determine the cost according to at least one of the results of face matching using a face image and the results of iris matching using an iris image. The cost determination unit 7134 may determine that the cost is equal to or greater than the cost threshold when at least one of the face matching score is worse than a predetermined score and the iris matching score is worse than a predetermined score. In this case, the selection unit 7131 may select to perform an impersonation determination.

In step S73, if both face matching using a face image and iris matching using an iris image are successful, the cost determination unit 7134 may determine that the cost is less than the cost threshold. In this case, in step S51, the selection unit 7131 may select not to perform spoofing determination.

In step S72, the status information generating unit 714 may update the status information S according to the frequency with which the target is authenticated by the authentication unit 716. In step S73, the cost determining unit 7134 may determine that the cost is equal to or greater than the cost threshold, for example, according to status information S indicating that the target has been authenticated a predetermined number of times or more within a predetermined time period. In this case, in step S51, the selecting unit 7131 may select to perform an impersonation determination.

If the selection unit 7131 determines that it is necessary to perform an impersonation determination in consideration of both the face matching result and the iris matching result, and if it determines that a time-consuming liveness method can be used, it may select a liveness method that prompts the subject to move their eyes.

The selection unit 7131 may select whether or not to perform an impersonation judgment regarding face matching or an impersonation judgment regarding iris matching depending on the result of one of the judgments. If the score of the impersonation judgment regarding face matching is equal to or higher than a predetermined value, the selection unit 7131 may determine that an impersonation judgment regarding iris matching is unnecessary. Also, the selection unit 7131 may determine that an impersonation judgment regarding face matching is unnecessary if the score of the impersonation judgment regarding iris matching is equal to or higher than a predetermined value.

The frequency of judgment may be updated in accordance with updates to the status information S and the cost. Meanwhile, in the seventh embodiment, the operations of steps S40 and S41 may be omitted.
[7-3: Technical Effects of Information Processing Device 7]

The information processing device 7 in the seventh embodiment determines whether to authenticate the subject based on the result of the spoofing determination and the result of the matching operation of the subject using biometric information, so that appropriate authentication can be performed. When the information processing device 7 determines not to authenticate the subject, at least one of the situation information S and the cost is updated, and a selection operation is performed according to the updated situation information S and the cost, so that an appropriate spoofing determination can be selected and the subject can be appropriately authenticated.
[8: Additional notes]

The following supplementary notes are further disclosed regarding the above-described embodiment.
[Appendix 1]
An acquisition means for acquiring biometric information of a target;
a determination means for determining whether or not the subject is impersonating another person by using the biometric information of the subject;
and a control unit that controls the determination of the determination unit in response to situation information indicating a situation when the biometric information was acquired from the subject.
[Appendix 2]
The determination means performs the determination using one or more methods,
The control means
a selection means for performing a selection operation of selecting whether or not to perform the determination and, if so, which method to use, according to the situation information;
The information processing device according to claim 1, further comprising: a processor for controlling the determination in accordance with a selection made by the selecting means.
[Appendix 3]
a selection result by the selection action according to the situation information is determined in advance;
The information processing device according to claim 2, wherein the selection means has a mechanism for outputting the selection result according to the situation information when the situation information is input.
[Appendix 4]
The control means further includes a frequency determination means for determining a frequency at which the determination is made in accordance with the situation information,
The information processing device according to claim 2 or 3, wherein the control means controls the determination in accordance with the selection by the selection means and the frequency.
[Appendix 5]
The control means further includes a determination means for determining a cost to be applied to the determination in accordance with the situation information,
The information processing device according to any one of claims 2 to 4, wherein the selection means performs the selection operation according to the cost.
[Appendix 6]
The selection means is
electing not to perform the determination if the cost is less than a cost threshold;
The information processing device according to claim 5, further comprising: selecting to perform the determination if the cost is equal to or greater than a cost threshold.
[Appendix 7]
The selection means is
If the value indicating the determination result using the first method is lower than a predetermined value,
The information processing device according to claim 5 or 6, further comprising: selecting a second technique corresponding to a cost higher than a cost corresponding to the first technique.
[Appendix 8]
The situation information includes at least one of a situation indicating a situation when the biometric information was acquired from the target, a determination status of the determination, and a matching status of a matching operation of the target using the biometric information,
The information processing device according to any one of claims 2 to 7, further comprising a situation information generating means for generating the situation information.
[Appendix 9]
Further, an authentication means is provided for determining whether or not to authenticate the target based on a result of the determination and a result of a matching operation of the target using the biometric information,
The situation information generating means updates the situation information when the authentication means determines not to authenticate the target;
The information processing device according to claim 8, wherein the selection means performs the selection operation in accordance with the updated situation information.
[Appendix 10]
Acquire the subject's biometric information;
using the biometric information of the subject to determine whether the subject is impersonating another person;
The information processing method further comprises controlling the determination in accordance with situation information indicating a situation when the biometric information was acquired from the subject.
[Appendix 11]
On the computer,
Acquire the subject's biometric information;
using the biometric information of the subject to determine whether the subject is impersonating another person;
A recording medium having a computer program recorded thereon for executing an information processing method for controlling the determination in accordance with situation information indicating a situation when the biometric information was acquired from the subject.
[Appendix 12]
The situation information includes information indicating a presence status of people around the target,
The selection means performs the selection operation in accordance with an amount of people around the target;
The information processing device according to any one of claims 2 to 9, wherein the selection means selects not to perform the determination operation when a predetermined number or more of people are present around the target.
[Appendix 13]
The information processing device according to any one of claims 2 to 9, wherein the selection means selects to perform the determination operation when the target is in an unmanned facility.
[Appendix 14]
The information processing device according to any one of claims 2 to 9, wherein the selection means identifies people around the target, and performs the selection operation in accordance with the identified people.
[Appendix 15]
The status information includes information indicating a payment amount of the target,
The information processing device according to any one of claims 2 to 9, wherein the selection means performs the selection operation according to the payment amount.
[Appendix 16]
The information processing device according to any one of claims 2 to 9, wherein, when an input of information indicating that the determination operation does not need to be performed is received from the target, the selection means selects not to perform the determination operation.
[Appendix 17]
The information processing device according to any one of claims 2 to 9, wherein the selection means selects to perform the determination operation when it detects that the subject is wearing patterned contact lenses.
[Appendix 18]
The information processing device according to any one of claims 2 to 9, wherein the method includes a method of applying a stimulus to the subject and acquiring a response of the subject to the stimulus, the response including an eye response of the subject.
[Appendix 19]
The information processing device according to claim 9, wherein, when the selection means selects not to perform the determination operation, the authentication means increases a matching threshold for a matching operation of the target using the biometric information.
[Appendix 20]
The information processing device according to claim 9 or 20, wherein the matching operation of the target using the biometric information includes face recognition using a face image of the target captured by a visible light camera, and iris recognition using an iris image of the target captured by a near-infrared camera.
[Appendix 21]
The information processing device according to claim 20, wherein the determination operation includes an impersonation determination using the face image, an impersonation determination using the iris image, and an impersonation determination using a face area included in an image captured by the near-infrared camera.
[Appendix 22]
The selection means is
In response to the situation information,
selecting whether or not to perform face spoofing determination using the face image or a face area included in an image captured by the near-infrared camera, and selecting whether or not to perform iris spoofing determination using the iris image,
The information processing device according to claim 21, further comprising: a step of selecting a method for making the subject move his/her eyes when the step of selecting to perform both the face spoofing determination and the iris spoofing determination is selected.
[Appendix 23]
The information processing device according to claim 21 or 22, wherein the selection means selects whether or not to perform the other determination depending on a result of one of the face spoofing determination and the iris spoofing determination.
[Appendix 24]
The information processing device according to any one of claims 21 to 23, wherein the determining means determines the cost according to at least one of a result of face authentication using the face image and a result of iris authentication using the iris image.
[Appendix 25]
The information processing device according to any one of claims 21 to 24, wherein the determination means determines that the cost is less than a cost threshold when both face authentication using the face image and iris authentication using the iris image are successful.
[Appendix 26]
26. The information processing device according to any one of claims 21 to 25, wherein the determination means determines the cost depending on a frequency at which the target is authenticated.
[Appendix 27]
27. The information processing device according to any one of claims 21 to 26, wherein the determination means determines the cost to be relatively high when it is desired to accurately determine whether the target is spoofing an identity.

This disclosure may be modified as appropriate within the scope of the claims and the technical idea that can be read from the entire specification. Information processing devices, information processing methods, and recording media that incorporate such modifications are also included in the technical idea of this disclosure.

1, 2, 3, 4, 5, 6, 7 Information processing device 11, 211 Acquisition unit 12, 212 Determination unit 13, 213, 313, 413, 513, 613, 713 Control unit 2131, 3131, 5131, 6131, 7131 Selection unit 321, 521 Method table 4132, 5132 Frequency determination unit 4133 Numerical value determination unit 422, 522 Frequency table 5134, 6134, 7134 Cost determination unit 6135, 7135 Re-determination necessity determination unit 614, 714 Status information generation unit 715 Collation unit 716 Authentication unit 723 Attribute table

Claims (11)

1. An acquisition means for acquiring biometric information of a target;
   a determination means for determining whether or not the subject is impersonating another person by using the biometric information of the subject;
   and a control unit that controls the determination of the determination unit in response to situation information indicating a situation when the biometric information was acquired from the subject.
2. The determination means performs the determination using one or more methods,
   The control means
   a selection means for performing a selection operation of selecting whether or not to perform the determination and, if so, which method to use, according to the situation information;
   The information processing device according to claim 1 , wherein the determination is controlled in accordance with a selection made by the selection means.
3. a selection result by the selection action according to the situation information is determined in advance;
   The information processing apparatus according to claim 2 , wherein the selection means has a mechanism for outputting the selection result according to the situation information when the situation information is input.
4. The control means further includes a frequency determination means for determining a frequency at which the determination is made in accordance with the situation information,
   The information processing device according to claim 2 , wherein the control means controls the determination in accordance with the selection of the selection means and the frequency.
5. The control means further includes a determination means for determining a cost to be applied to the determination in accordance with the situation information,
   The information processing apparatus according to claim 2 , wherein the selection means performs the selection operation in accordance with the cost.
6. The selection means is
   electing not to perform the determination if the cost is less than a cost threshold;
   The information processing apparatus according to claim 5 , further comprising: selecting to perform the determination when the cost is equal to or greater than a cost threshold value.
7. The selection means is
   If the value indicating the determination result using the first method is lower than a predetermined value,
   The information processing apparatus according to claim 5 , further comprising: selecting a second technique corresponding to a cost higher than a cost corresponding to the first technique.
8. The situation information includes at least one of a situation indicating a situation when the biometric information was acquired from the target, a determination status of the determination, and a matching status of a matching operation of the target using the biometric information,
   The information processing apparatus according to claim 2 , further comprising situation information generating means for generating the situation information.
9. Further, an authentication means is provided for determining whether or not to authenticate the target based on a result of the determination and a result of a matching operation of the target using the biometric information,
   The situation information generating means updates the situation information when the authentication means determines not to authenticate the target;
   The information processing device according to claim 8 , wherein the selection means performs the selection operation in accordance with the updated situation information.
10. Acquire the subject's biometric information;
    using the biometric information of the subject to determine whether the subject is impersonating another person;
    The information processing method further comprises controlling the determination in accordance with situation information indicating a situation when the biometric information was acquired from the subject.
11. On the computer,
    Acquire the subject's biometric information;
    using the biometric information of the subject to determine whether the subject is impersonating another person;
    A recording medium having a computer program recorded thereon for executing an information processing method for controlling the determination in accordance with situation information indicating a situation when the biometric information was acquired from the subject.

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