Terminal and method

Abstract

The purpose of the present disclosure is to provide a terminal and a method for improving terminal security. A terminal 10 according one aspect of the present disclosure is provided with: a storage unit 11 that stores a first physical quantity based on a deformation caused by wearing by a user; a detection unit 12 that detects a second physical quantity based on a deformation caused by wearing by the user; and an authentication unit 13 that performs biometric authentication on the basis of the first physical quantity and the second physical quantity.

Description

Terminal and method

[0001] The present invention relates to a terminal and a method.

[0002] There are known techniques for acquiring biometric information using a wearable device. Patent Document 1 discloses an authentication device that performs authentication using the biometric information of a user wearing a wearable device. Patent Document 2 discloses eyeglasses with a sensor that detects biometric authentication data.

[0003] Japanese Patent Application Laid-Open No. 2020-77398 Japanese Patent Application Laid-Open No. 2020-522756

[0004] In order to prevent unauthorized use of a terminal, personal authentication may be performed. In the technology described in Patent Document 1, biometric information such as vein patterns, irises, fingerprints, wrinkle patterns on the skin, or facial images is used for authentication. In the technology described in Patent Document 2, diagnostic data such as heart rate, electrocardiogram, or electroencephalogram is acquired.

[0005] The present disclosure aims to provide a terminal and a method for improving the security of the terminal.

[0006] A terminal according to one aspect of the present disclosure includes a memory unit that stores a first physical quantity based on deformation caused by wearing the terminal by a user, a detection unit that detects a second physical quantity based on deformation caused by wearing the terminal by a user, and an authentication unit that performs biometric authentication based on the first physical quantity and the second physical quantity.

[0007] In a terminal according to one aspect of the present disclosure, biometric authentication is performed based on a stored first physical quantity and a detected second physical quantity. Each user's wearing comfort and wearing habits are expressed as the first physical quantity and the second physical quantity. By using the first physical quantity and the second physical quantity for biometric authentication, biometric authentication can be performed easily and accurately. As a result, the security of the terminal 10 can be improved.

[0008] According to the present disclosure, it is possible to improve the security of a terminal.

[0009] Fig. 1 is a block diagram showing an example of the configuration of a terminal. Fig. 2 is a diagram showing an example of the external appearance of the terminal. Fig. 3 is a flowchart showing an example of the operation of the terminal. Fig. 4 is a diagram showing an example of the hardware configuration of the terminal.

[0010] The present disclosure will be described with reference to the accompanying drawings. Whenever possible, the same parts are designated by the same reference numerals and redundant description will be omitted.

[0011] FIG. 1 is a block diagram showing an example of the configuration of a terminal 10. The terminal 10 is a wearable terminal that can be worn on a user's body. For example, the terminal 10 is a glasses-type wearable terminal. In one example, the terminal 10 may be smart glasses or a head-mounted display. The terminal 10 of the present disclosure performs biometric authentication when worn on a user's body. The terminal 10 includes, as functional elements, a storage unit 11, a detection unit 12, and an authentication unit 13.

[0012] The storage unit 11 is a non-transitory storage medium or storage device that stores correct answer data for biometric authentication. The storage unit 11 stores a first physical quantity based on deformation caused by wearing the device by a user. The first physical quantity is, for example, a voltage value. The first physical quantity may also be a deformation amount. The storage unit 11 may store a voltage value detected in advance using the detection unit 12 described below as correct answer data.

[0013] The detection unit 12 detects authentication data of an authentication target. The detection unit 12 detects a second physical quantity based on deformation caused by wearing the device by a user. The detection unit 12 is configured by, for example, a piezoelectric element and a voltmeter. The second physical quantity is, for example, a voltage value. The second physical quantity may also be a deformation amount. The number of detection units 12 is not limited.

[0014] The authentication unit 13 performs biometric authentication based on the first physical quantity and the second physical quantity. For example, the authentication unit 13 compares the first physical quantity with the second physical quantity. In other words, the authentication unit 13 compares correct data for biometric authentication with authentication data of the authentication target. In one example, the authentication unit 13 may determine that the biometric authentication is successful if the error in the comparison result is equal to or smaller than a predetermined threshold. The authentication unit 13 may determine that the biometric authentication is unsuccessful if the error in the comparison result exceeds a predetermined threshold.

[0015] 2 is a diagram illustrating an example of the external appearance of the terminal 10. The detection unit 12 may detect a voltage value based on deformation of a portion that comes into contact with the user's body and a portion that does not come into contact with the user's body. The terminal 10 is provided with a first detection unit 121, a second detection unit 122, a third detection unit 123, a fourth detection unit 124, and a fifth detection unit 125 as examples of the detection unit 12. When the user wears the terminal 10, the first detection unit 121, the second detection unit 122, the third detection unit 123, the fourth detection unit 124, and the fifth detection unit 125 each detect a second physical quantity.

[0016] The first detection unit 121 is provided at a position corresponding to the user's nose when the terminal 10 is worn. For example, the first detection unit 121 may be provided in the first portion 101 corresponding to the bridge or nose pad of eyeglasses. The first portion 101 deforms when it comes into contact with the user's nose. The first detection unit 121 detects a voltage value generated based on the deformation of the first portion 101.

[0017] The second detector 122 and the third detector 123 are provided at positions corresponding to the front of the user's temples when the terminal is worn. For example, the second detector 122 and the third detector 123 may be provided at the second portion 102 and the third portion 103, which respectively correspond to a pair of hinges (left and right) or a pair of temples (left and right) of eyeglasses. The second portion 102 and the third portion 103 expand and deform as the terminal 10 is worn on the user's head. The second portion 102 and the third portion 103 do not need to come into contact with the user's head. The second detector 122 detects a voltage value generated based on the deformation of the second portion 102. The third detector 123 detects a voltage value generated based on the deformation of the third portion 103.

[0018] The fourth detector 124 and the fifth detector 125 are provided at positions corresponding to the upper parts of the user's ears when the terminal 10 is worn. For example, the fourth detector 124 and the fifth detector 125 may be provided at the fourth part 104 and the fifth part 105, which respectively correspond to the pair of temple tips (left and right) of the eyeglasses. The fourth part 104 and the fifth part 105 deform upon contact with at least one of the user's ear and the temporal part of the head. The fourth detector 124 detects a voltage value generated based on the deformation of the fourth part 104. The fifth detector 125 detects a voltage value generated based on the deformation of the fifth part 105.

[0019] 3 is a flowchart showing an example of the operation of the terminal 10. In the following description, it is assumed that the storage unit 11 has stored therein in advance the first physical quantity as correct data. For example, the storage unit 11 may store, as the first physical quantity, voltage values ​​R1 to R5 corresponding to the first portion 101, the second portion 102, the third portion 103, the fourth portion 104, and the fifth portion 105, respectively.

[0020] In step S1, the user wears the terminal 10. For example, the user wears a glasses-type wearable terminal (terminal 10). Each part of the terminal 10 deforms when worn. In one example, the first part 101 deforms when it comes into contact with the user's nose. The second part 102 and the third part 103 expand and deform when the terminal 10 is worn on the user's head. The fourth part 104 and the fifth part 105 deform when it comes into contact with at least one of the user's ear and temporal region.

[0021] In step S2, the detection unit 12 detects a second physical quantity. The detection unit 12 detects the second physical quantity based on deformation caused by wearing by the user. The second physical quantity is, for example, a voltage value. In one example, the first detection unit 121, the second detection unit 122, the third detection unit 123, the fourth detection unit 124, and the fifth detection unit 125 each detect the second physical quantity. The first detection unit 121, the second detection unit 122, the third detection unit 123, the fourth detection unit 124, and the fifth detection unit 125 may detect voltage values ​​T1 to T5 corresponding to the first portion 101, the second portion 102, the third portion 103, the fourth portion 104, and the fifth portion 105, respectively, as the second physical quantity.

[0022] In step S3, the terminal 10 allocates processing based on whether the variation satisfies a condition. The condition may be whether the variation range of the second physical quantity per certain time period is equal to or less than a predetermined threshold. The certain time period may be, for example, several seconds. If the variation satisfies the condition (YES in step S3), the processing proceeds to step S4. If the variation does not satisfy the condition (NO in step S3), the processing returns to step S2.

[0023] In step S4, the authentication unit 13 performs biometric authentication based on the first physical quantity and the second physical quantity. For example, the authentication unit 13 compares the first physical quantity with the second physical quantity. In one example, the authentication unit 13 compares the voltage values ​​R1 to R5 with the voltage values ​​T1 to T5, respectively.

[0024] In one example, assume that the voltage values ​​R1 to R5 are 0.1 V, 0.2 V, 0.2 V, 0.1 V, and 0.3 V, respectively. Also assume that the voltage values ​​T1 to T5 are 0.1 V, 0.2 V, 0.2 V, 0.1 V, and 0.3 V, respectively. In this case, since the voltage values ​​R1 to R5 and the voltage values ​​T1 to T5 match, the authentication unit 13 may determine that the biometric authentication was successful.

[0025] In another example, assume that the voltage values ​​R1 to R5 are 0.1 V, 0.2 V, 0.2 V, 0.1 V, and 0.3 V, respectively. Also assume that the voltage values ​​T1 to T5 are 0.2 V, 0.2 V, 0.2 V, 0.2 V, and 0.3 V, respectively. In this case, since the voltage values ​​T1 and T4 do not match the voltage values ​​R1 and R4, respectively, the authentication unit 13 may determine that the biometric authentication has failed.

[0026] The authentication unit 13 may determine that the biometric authentication is successful if the error in the matching result is equal to or smaller than a predetermined threshold. The error may be the difference between the first physical quantity and the second physical quantity. The authentication unit 13 may determine that the biometric authentication is unsuccessful if the error in the matching result exceeds a predetermined threshold. The authentication unit 13 may perform biometric authentication using a threshold according to the position of the detection unit 12. For example, the predetermined threshold corresponding to the first detection unit 121 and the predetermined threshold corresponding to the fifth detection unit 125 may be different from each other. The variation in voltage values ​​detected at a position corresponding to the user's nose may be different from the variation in voltage values ​​detected at a position corresponding to the top of the user's ear. The authentication unit 13 may set a threshold according to the variation.

[0027] In step S5, the terminal 10 assigns processing based on whether the biometric authentication is successful. If the biometric authentication is successful (YES in step S5), the processing proceeds to step S6. If the biometric authentication is unsuccessful (NO in step S6), the processing proceeds to step S7.

[0028] In step S6, the authentication unit 13 permits the use of the terminal 10. The authentication unit 13 may permit the use of some or all of the functions of the terminal 10.

[0029] In step S7, the authentication unit 13 prohibits the use of the terminal 10. The authentication unit 13 may prohibit the use of some or all of the functions of the terminal 10.

[0030] As described above, the terminal 10 according to one aspect of the present disclosure includes a memory unit 11 that stores a first physical quantity based on deformation caused by wearing the terminal 10 by a user, a detection unit 12 that detects a second physical quantity based on deformation caused by wearing the terminal 10 by a user, and an authentication unit 13 that performs biometric authentication based on the first physical quantity and the second physical quantity.

[0031] A method according to one aspect of the present disclosure includes the steps of storing a first physical quantity based on deformation caused by wearing the device by a user, detecting a second physical quantity based on deformation caused by wearing the device by a user, and performing biometric authentication based on the first physical quantity and the second physical quantity.

[0032] In a terminal 10 and a method according to an aspect of the present disclosure, biometric authentication is performed based on a stored first physical quantity and a detected second physical quantity. Each user's wearing comfort and wearing habits are expressed as the first physical quantity and the second physical quantity. By using the first physical quantity and the second physical quantity for biometric authentication, biometric authentication can be performed easily and accurately. As a result, the security of the terminal 10 can be improved.

[0033] The terminal 10 is a glasses-type wearable terminal. The detection unit 12 is a piezoelectric element and a voltmeter. The first physical quantity and the second physical quantity are voltage values. In the case of a glasses-type wearable terminal, various parts of the frame may deform when the terminal is worn on the user's head. The voltage value associated with the deformation of the frame is used for biometric authentication, allowing biometric authentication to be performed easily and accurately.

[0034] The detector 12 detects voltage values ​​based on deformation of parts of the body that come into contact with the user's body and parts that do not come into contact with the user's body. Not only parts that come into contact with the user's body (e.g., the first part 101, the fourth part 104, and the fifth part 105) but also parts that do not come into contact with the user's body (e.g., the second part 102 and the third part 103) may deform. By using voltage values ​​corresponding to various parts for biometric authentication, the accuracy of biometric authentication is improved.

[0035] The detector 12 includes a first detector 121 provided at a position corresponding to the user's nose, a pair of second and third detectors 122 and 123 provided at a position corresponding to the front of the user's temples, and a pair of fourth and fifth detectors 124 and 125 provided at a position corresponding to the top of the user's ears. The first detector 121, second detector 122, third detector 123, fourth detector 124, and fifth detector 125 are provided at locations where they can accurately detect voltage values ​​associated with deformation. As a result, the accuracy of biometric authentication is improved.

[0036] The authentication unit 13 performs biometric authentication using a threshold value according to the position of the detection unit 12. The biometric authentication is performed according to the position of the detection unit 12. As a result, the accuracy of the biometric authentication is improved.

[0037] The authentication unit 13 performs biometric authentication when a change in the second physical quantity per unit time satisfies a condition. Since biometric authentication is performed when a change in the second physical quantity per unit time satisfies a condition, for example, biometric authentication is performed when the terminal 10 is worn stably. Noise due to deformation when the user adjusts the wearing position of the terminal 10 can be suppressed. As a result, the accuracy of biometric authentication is improved.

[0038] In the above embodiment, an example has been described in which the terminal 10 is a glasses-type wearable terminal, but this is not limiting. For example, the terminal 10 may be an armband-type, earphone-type, or accessory-type wearable terminal. In this case, the detection unit 12 may be provided at a location that deforms when worn by a user. In one example, if the terminal 10 is an armband-type wearable terminal, the detection unit 12 may be provided on the entire band. The detection unit 12 may detect a voltage value, etc. based on the deformation of the terminal 10 along the bone structure and muscles of the arm. In another example, if the terminal 10 is an earphone-type wearable terminal, the detection unit 12 may be provided on the outer periphery of an earpiece inserted into the ear. The detection unit 12 may detect a voltage value, etc. based on the deformation of the terminal 10 along the shape of the ear canal.

[0039] The authentication unit 13 may use a specific action for biometric authentication. For example, the user may perform a specific action when wearing the terminal 10. The storage unit 11 may store a first physical quantity based on a deformation associated with the specific action. The detection unit 12 may detect a second physical quantity based on a deformation associated with the specific action. In one example, the specific action may be pressing the second part 102 of the terminal 10 for several seconds to generate a voltage value above a threshold for several seconds. Using a specific action that only the user knows for biometric authentication improves the reliability of the biometric authentication.

[0040] The storage unit 11 may store the difference between the first physical quantity and the second physical quantity as a history for each biometric authentication. The authentication unit 13 may dynamically change the acceptable range for biometric authentication using the history for a certain period of time. In one example, the authentication unit 13 may set a new acceptable range up to a predetermined error range based on the history for a certain period of time. In another example, the authentication unit 13 may update the second physical quantity within a predetermined error range as a new first physical quantity for each biometric authentication and store the updated first physical quantity in the storage unit 11. The authentication data of the authentication target may be affected by the season, physical condition, etc. For example, the condition of the user's head and skin is not constant. Dynamically changing the acceptable range for biometric authentication improves the reliability of biometric authentication.

[0041] The present disclosure may have the following configurations. [1] A terminal comprising: a storage unit that stores a first physical quantity based on deformation caused by wearing the terminal by a user; a detection unit that detects a second physical quantity based on deformation caused by wearing the terminal by the user; and an authentication unit that performs biometric authentication based on the first physical quantity and the second physical quantity. [2] The terminal described in [1], wherein the terminal is a glasses-type wearable terminal, the detection unit is a piezoelectric element and a voltmeter, and the first physical quantity and the second physical quantity are voltage values. [3] The terminal described in [2], wherein the detection unit detects voltage values ​​based on deformation of a part that contacts the user's body and a part that does not contact the user's body. [4] The terminal described in [2], wherein the detection unit has a first detection unit provided at a position corresponding to the user's nose, second and third detection units that are provided as a pair at a position corresponding to in front of the user's temples, and fourth and fifth detection units that are provided as a pair at positions corresponding to the tops of the user's ears. [5] The terminal according to [4], wherein the authentication unit performs the biometric authentication using a threshold value according to the position of the detection unit. [6] The terminal according to any of [1] to [5], wherein the authentication unit performs the biometric authentication when a change in the second physical quantity per certain period of time satisfies a condition. [7] A method comprising: a step of storing a first physical quantity based on a deformation caused by wearing by a user; a step of detecting a second physical quantity based on the deformation caused by wearing by the user; and a step of performing biometric authentication based on the first physical quantity and the second physical quantity.

[0042] The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

[0043] Functions include, but are not limited to, judgment, determination, assessment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0044] For example, the terminal 10 according to an embodiment of the present disclosure may function as a computer that performs information processing according to the present disclosure. Fig. 4 is a diagram illustrating an example of a hardware configuration of the terminal 10 according to an embodiment of the present disclosure. The terminal 10 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0045] In the following description, the term "device" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the terminal 10 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0046] Each function of the terminal 10 is realized by loading specified software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and storage 1003.

[0047] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, each function of the terminal 10 described above may be realized by the processor 1001.

[0048] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, each function of the terminal 10 may be implemented by a control program stored in the memory 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may also be transmitted from a network via a telecommunications line.

[0049] The memory 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for performing information processing according to an embodiment of the present disclosure.

[0050] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The storage medium provided in terminal 10 may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0051] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.

[0052] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0053] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0054] The terminal 10 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0055] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0056] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be transmitted to another device.

[0057] The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0058] The aspects / embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

[0059] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0060] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0061] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0062] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0063] Furthermore, the information, parameters, etc. described in this disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information.

[0064] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0065] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0066] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0067] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0068] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0069] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0070] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0071] 10...terminal, 11...memory unit, 12...detection unit, 13...authentication unit, 101...first part, 102...second part, 103...third part, 104...fourth part, 105...fifth part, 121...first detection unit, 122...second detection unit, 123...third detection unit, 124...fourth detection unit, 125...fifth detection unit.

Claims

1. A terminal comprising: a memory unit that stores a first physical quantity based on deformation caused by wearing the terminal by a user; a detection unit that detects a second physical quantity based on deformation caused by wearing the terminal by a user; and an authentication unit that performs biometric authentication based on the first physical quantity and the second physical quantity.

2. The terminal according to claim 1, wherein the terminal is a glasses-type wearable terminal, the detection unit is a piezoelectric element and a voltmeter, and the first physical quantity and the second physical quantity are voltage values.

3. The terminal according to claim 2, wherein the detection unit detects a voltage value based on deformation of a portion that is in contact with the user's body and a portion that is not in contact with the user's body.

4. The terminal according to claim 2, wherein the detection unit comprises a first detection unit provided at a position corresponding to the nose of the user, a second detection unit and a third detection unit provided as a pair at a position corresponding to the front of the temples of the user, and a fourth detection unit and a fifth detection unit provided as a pair at a position corresponding to the tops of the ears of the user.

5. The terminal according to claim 4, wherein the authentication unit performs the biometric authentication using a threshold value according to the position of the detection unit.

6. The terminal according to claim 1, wherein the authentication unit performs the biometric authentication when a variation in the second physical quantity per unit time satisfies a condition.

7. A method comprising the steps of: storing a first physical quantity based on deformation caused by wearing the device by a user; detecting a second physical quantity based on deformation caused by wearing the device by the user; and performing biometric authentication based on the first physical quantity and the second physical quantity.

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