JP2019211804A - Personal authentication apparatus, personal authentication method and program - Google Patents

Abstract

To provide a personal authentication apparatus capable of preventing spoofing.SOLUTION: A personal authentication apparatus 10 includes an acquisition unit 13 that acquires identification source information indicating motion of a hand from a first motion measurement unit 11 that measures the motion of the hand when signing, a signing information management unit 14 that stores an identifier of an individual and identification target information indicating the motion of the hand of the individual in association with each other, and a signing information matching unit 15 that matches the identification source information acquired by the acquisition unit 13 and the identification target information stored in the signing information management unit 14 and outputs a matching result.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a personal authentication device, a personal authentication method, and a program.

  As a conventional biometric authentication device (personal authentication device), for example, a device using a fingerprint, a palm print, a hand print, a finger joint print, a blood vessel pattern, a retina pattern, an iris pattern, an ear canal pattern, a DNA array, or the like is known. . For example, Patent Document 1 discloses an electronic device in which a fingerprint authentication device comes into contact with a fingerprint of a hand, reads the fingerprint pattern, and compares it with a registered fingerprint pattern for biometric authentication.

Japanese Patent Laying-Open No. 2015-167022

  Biometric information such as fingerprints can be easily duplicated by using a camera, a 3D printer, or the like. In the method of Patent Document 1, it is difficult to prevent impersonation if a fingerprint is copied.

  The present disclosure provides a personal authentication device and the like that can prevent spoofing.

  A personal authentication device according to an aspect of the present disclosure includes an acquisition unit that acquires verification source information indicating the hand movement from a first motion measurement unit that measures the movement of the hand when signing, and an individual identifier And the signature information management unit that stores the verification target information indicating the movement of the individual hand in association with each other, the verification source information acquired by the acquisition unit, and the signature information management unit A signature information collating unit that collates the collation target information and outputs a collation result.

  The personal authentication method according to an aspect of the present disclosure is acquired in the acquisition step of acquiring collation source information indicating the movement of the hand from a motion measurement unit that measures the movement of the hand when signing, and acquired in the acquisition step A collation step of collating the collation source information with collation target information indicating movement of the individual hand associated with the individual identifier; and an output step of outputting the collation result.

  A program according to an aspect of the present disclosure is a program for causing a computer to execute the personal authentication method.

  These comprehensive or specific modes may be realized by a system, a method, an integrated circuit, a computer program, or a recording medium such as a computer-readable CD-ROM. The system, method, integrated circuit, computer program Also, any combination of recording media may be realized.

  According to the present disclosure, a personal authentication device and the like that can prevent spoofing are provided.

FIG. 1 is a schematic diagram illustrating a schematic configuration of the personal authentication device according to the first embodiment. FIG. 2 is a block diagram illustrating a functional configuration of the personal authentication device according to the first embodiment. FIG. 3 is a diagram illustrating an example of time-series information output from the signature operation extraction unit according to the first embodiment. FIG. 4 is a diagram showing time-series information stored in the signature information management unit according to the first embodiment. FIG. 5A is a flowchart showing a procedure for storing time-series information in the signature information management unit according to Embodiment 1. FIG. 5B is a flowchart showing a procedure of personal authentication in the personal authentication apparatus according to Embodiment 1. FIG. 6 is a schematic diagram illustrating a state in which the personal authentication device according to Embodiment 1 signs a signature without using a writing instrument. FIG. 7 is a schematic diagram illustrating another example of the writing instrument according to the first embodiment. FIG. 8 is a schematic diagram illustrating a schematic configuration of the personal authentication device according to the second embodiment. FIG. 9 is a schematic diagram illustrating a schematic configuration of the personal authentication device according to the third embodiment. FIG. 10 is a schematic diagram illustrating a schematic configuration of the personal authentication device according to the fourth embodiment. FIG. 11 is a schematic diagram illustrating a schematic configuration of the personal authentication device according to the fifth embodiment. FIG. 12 is a block diagram illustrating a functional configuration of the personal authentication device according to the fifth embodiment.

(Knowledge that became the basis of this disclosure)
In recent years, sensing devices such as high-resolution cameras, advanced AI (Artificial Intelligence) image processing software, and high-precision molding devices such as 3D printers are provided at low cost. Therefore, in the fingerprint authentication device described in Patent Document 1 cited in “Background Art”, a fingerprint pattern image is obtained, and a similar fingerprint is produced using a flexible synthetic resin, etc. There is a problem that authentication can be passed. In addition, palm prints, hand prints, iris patterns, and the like are all biometric authentication methods based on still images, and thus have the same problem that they are technically easy to impersonate.

  The present inventor has intensively studied this problem, and has arrived at an anti-spoofing device (personal authentication device) of the present disclosure that uses human hand movement information as biometric information by non-contact motion measurement to prevent spoofing. did.

  A personal authentication device according to an aspect of the present disclosure includes an acquisition unit that acquires verification source information indicating the hand movement from a first motion measurement unit that measures the movement of the hand when signing, and an individual identifier And the signature information management unit that stores the verification target information indicating the movement of the individual hand in association with each other, the verification source information acquired by the acquisition unit, and the signature information management unit A signature information collating unit that collates the collation target information and outputs a collation result.

  Thereby, it is possible to collate the hand movement (verification source information) when signed and the hand movement (verification target information) stored in advance. Since the collation source information and the collation target information are time-series information, for example, even if a signature is imitated by handwriting, it is possible to collate whether or not the person is the person due to a difference in hand movement during the signature. . Therefore, the personal authentication device according to an aspect of the present disclosure can prevent impersonation by using human hand movement information as biometric information by non-contact motion measurement.

  In addition, the acquisition unit may acquire the verification source information from the first motion measurement unit that measures the movement of the hand at a distance and a relative speed from a millimeter wave radar using a millimeter wave band radio wave.

  Thereby, a difference in the shape of the hand or the like appears in the radio wave reflection pattern, so that it is possible to check whether or not the person is the person using the hand shape in addition to the hand movement. That is, spoofing can be further prevented.

  In addition, the acquisition unit obtains a detection result as to whether or not the writing tool and the signature target are in contact from a writing pressure detection unit that detects whether or not the writing tool for signing and the signature target are in contact with each other. The collation source information acquired and acquired by the acquisition unit includes information indicating the movement of the hand measured by the first motion measurement unit, wherein the writing pressure detection unit determines whether the writing instrument and the signature target are included. The information which extracted the part measured when detecting contacting may be sufficient.

  As a result, it is possible to acquire information indicating the hand movement measured by the first motion measurement unit when the signing person is actually signing. That is, it is possible to remove a portion (noise component) that is not necessary for collation from the hand movement measured by the first motion measurement unit. Therefore, the accuracy of verification in the signature information verification unit is improved.

  The writing pressure detection unit includes a guideline indicating a position where the signature object is arranged in the writing pressure detection unit, and the acquisition unit includes the signature object arranged corresponding to the guideline. The hand movement may be acquired as the verification source information.

  Thereby, since the area | region which needs to be measured by the 1st motion measurement part can be estimated, the area | region where a 1st motion measurement part radiate | emits a radio wave, etc. can be determined easily.

  The writing instrument may include a reflection unit that reflects the radio wave emitted by the first motion measurement unit, and the verification source information may be information indicating the movement of the hand and the movement of the writing instrument. .

  Thereby, the verification source information includes information on the movement of the writing instrument in addition to the movement of the hand. For example, the accuracy of verification by the signature information verification unit can be improved by setting the position of the reflection unit of the writing instrument for each individual. That is, spoofing can be further prevented.

  Moreover, you may further provide the guard part which suppresses that an electromagnetic wave injects into the said personal authentication apparatus from the outside of the said personal authentication apparatus.

  Thereby, since disturbance (noise component) can be suppressed, the accuracy of verification by the signature information verification unit can be improved. That is, spoofing can be further prevented.

  The writing pressure detection unit is plate-shaped and includes a first main surface and a second main surface that faces away from the first main surface, and the first motion measurement unit includes the first main surface. The second motion measurement unit is arranged at a position overlapping the first motion measurement unit in plan view, and the acquisition unit is 1) The movement of the hand measured by the first motion measurement unit on the first main surface is acquired as the verification source information, or 2) the second motion measurement unit measured on the second main surface Hand movement may be acquired as the verification source information.

  Thereby, regardless of whether the right hand or the left hand is used for signing, the hand movement can be measured under the same conditions. Therefore, it is possible to prevent impersonation regardless of the signing hand.

  And an identifier acquisition unit that acquires an identifier of the individual to be signed, and a display unit that displays the personal signature corresponding to the identifier input to the identifier acquisition unit, wherein the acquisition unit includes the displayed signature The movement of the hand at the time of tracing may be acquired as the verification target information.

  Thereby, it is possible to check whether or not the person has signed from the movement of the hand when tracing the signature. When a person other than the person traces the signature, it is considered that the person cannot trace smoothly compared to the person himself / herself. That is, it becomes easy to make a difference in the measurement result of the hand movement depending on whether the person is the person or not. Therefore, impersonation can be further prevented.

  Further, the signature information collating unit associates with the collation target information indicating the movement of the hand most similar to the collation source information acquired by the acquiring unit from the signature information managing unit as a result of the collation. The individual identifier and the degree of belonging to the individual may be output.

  As a result, the identifier (for example, name) and the degree of attribution of the most likely person are output from the results collated by the signature information collation unit, so it is easy to determine whether the person who is signing is the person himself / herself. Can be determined. That is, spoofing can be further prevented.

  Further, the information processing apparatus may further include a signature information registration unit that associates the identifier of the individual and information indicating hand movement at the time of signing the individual and stores the information in the signature information management unit.

  As a result, since the verification target information can be updated in the personal authentication device, the convenience of the authentication device is improved.

  The personal authentication method according to an aspect of the present disclosure is acquired in the acquisition step of acquiring collation source information indicating the movement of the hand from a motion measurement unit that measures the movement of the hand when signing, and acquired in the acquisition step A collation step of collating the collation source information with collation target information indicating movement of the individual hand associated with the individual identifier; and an output step of outputting the collation result. A program according to an aspect of the present disclosure is a program for causing a computer to execute the personal authentication method.

  Thereby, there exists an effect similar to a personal authentication apparatus.

  Hereinafter, a personal authentication device and the like according to an embodiment will be described with reference to the drawings. The embodiment described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present disclosure. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description may be abbreviate | omitted or simplified.

  Further, in this specification, a term indicating a relationship between elements such as parallel, a term indicating a shape of an element such as a rectangle, and a numerical value range are not expressions expressing only a strict meaning, It is an expression that means to include an equivalent range, for example, a difference of about several percent.

  In the present specification and drawings, an X axis, a Y axis, and a Z axis indicate three axes of a three-dimensional orthogonal coordinate system. In each figure, the Z-axis direction is, for example, a direction parallel to the thickness direction of the writing pressure detection unit. The X-axis direction and the Y-axis direction are orthogonal to each other, and both are directions orthogonal to the Z-axis direction. For example, in the following embodiments, “plan view” means viewing from the Z-axis direction.

(Embodiment 1)
A personal authentication device and the like according to the present embodiment will be described with reference to FIGS.

[1. Configuration of personal authentication device]
First, the personal authentication device 10 according to the present embodiment will be described with reference to FIGS.

  FIG. 1 is a schematic diagram showing a schematic configuration of a personal authentication device 10 according to the present embodiment. FIG. 2 is a block diagram showing a functional configuration of the personal authentication device 10 according to the present embodiment. The personal authentication device 10 according to the present embodiment is a device that measures the movement of the hand h when writing a predetermined character and performs personal authentication using the measured result. Characters include kanji, hiragana, katakana, numbers, alphabets, and figures and symbols. In the following description, an example in which a predetermined character is a name will be described. The personal authentication device 10 authenticates the individual by comparing the movement of the hand h signed by the person with the movement of the hand h stored in advance in the personal authentication device 10. FIG. 1 shows an example in which a signature is made using the writing instrument 20. The writing instrument 20 is, for example, a ballpoint pen or a pencil. The writing instrument 20 may be an electronic pen.

  In the following description, an example in which the movement of the hand h is the movement of the hand h when signing is described, but the present invention is not limited to this. The movement of the hand h may be a movement of the hand h that is relatively simple and highly reproducible. In addition, the signature may be a full name or only a name or a name. The signature may be hiragana, kanji, or alphabet.

  As shown in FIGS. 1 and 2, the personal authentication device 10 includes a motion measurement unit 11, a writing pressure detection unit 12, a signature operation extraction unit 13, a signature information management unit 14, a signature information verification unit 15, and signature information registration. The unit 16 is provided. The components such as the signature operation extraction unit 13, the signature information matching unit 15, and the signature information registration unit 16 may be configured by dedicated hardware, and are realized by executing a software program suitable for each component. May be. Each component may be realized by a program execution unit such as a CPU (Central Processing Unit) or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

  The motion measurement unit 11 measures the movement (movement) of the hand h when the subject signs with the writing instrument 20. The motion measurement unit 11 is configured by a sensing device such as a radar device (for example, a radar imaging device). Although it does not specifically limit as a frequency of the electromagnetic wave w, From a viewpoint of measuring more finely, it is good to use the millimeter wave band of the range of 30 GHz to 300 GHz, for example. Further, by using the millimeter wave band radio wave w, the radio wave w passes through the gloves and reaches the hand h (skin) even if the hand h is covered with clothes such as gloves. Since the reflection pattern of the reflected wave reflected by the hand h changes depending on the shape of the hand h, it is possible to prevent impersonation even when another person puts on a glove and impersonates a signature. Also, the reflection pattern of the reflected wave varies depending on the material. Therefore, even when a robot or the like imitates a handwriting and performs a signature, detection is possible due to a difference between the human skin and the material of the robot's hand (for example, metal). The motion measurement unit 11 outputs the measurement result to the signature operation extraction unit 13.

  As described above, the motion measurement unit 11 may be configured by a millimeter wave radar that uses the radio wave w in the millimeter wave band. The motion measurement unit 11 measures the movement of the hand h from the distance from the motion measurement unit 11 to the object (specifically, the hand h) and the relative speed of the object with respect to the motion measurement unit 11. The distance and the relative speed are included in the verification source information. Note that the motion measurement unit 11 may perform measurement by increasing the directivity of the radio wave w and scanning the radio wave w, or may decrease the directivity of the radio wave w and perform measurement without scanning. Further, the motion measuring unit 11 may emit the radio wave w at every predetermined time interval or may continuously emit the radio wave w.

  The writing instrument 20 may be covered with a radio wave absorber that absorbs the radio wave w emitted by the motion measurement unit 11. Thereby, since reflection of the electromagnetic wave w from the writing instrument 20 is suppressed, the motion measuring unit 11 can more accurately measure the movement of the hand h. The writing instrument 20 is not limited to being covered with a radio wave absorber.

  The motion measurement unit 11 is disposed on the surface of the writing pressure detection unit 12. As shown in FIG. 1, the writing pressure detection unit 12 according to the present embodiment has a rectangular plate shape. The motion measuring unit 11 is arranged at a corner c of the principal surface 12a on the Z-axis plus side of the writing pressure detecting unit 12. The corner c is a region including the intersection of the contour lines of the writing pressure detection unit 12 and is an example of a predetermined position where the motion measurement unit 11 is arranged. The position where the motion measurement unit 11 is arranged is not limited to the corner c. The main surface 12a on the Z-axis plus side of the writing pressure detection unit 12 is an example of a first main surface. In addition, the rectangular plate shape refers to a thin rectangular parallelepiped shape, but each ridge and side surface need not be a straight line or a plane, and includes a shape whose cross section is a polygon that approximates a rectangle. In addition, the shape of the writing pressure detection part 12 is not limited to a rectangular plate shape, Arbitrary plate shape can be employ | adopted. The shape of the writing pressure detection unit 12 may be, for example, an elliptical plate shape or a round plate shape (disk shape).

  Note that the motion measurement unit 11 is not limited to measurement using a radar. The motion measurement unit 11 may be, for example, a camera (for example, a TOF camera) that can obtain a distance image. The motion measurement unit 11 is an example of a first motion measurement unit.

  The writing pressure detection unit 12 determines whether or not the writing tool 20 for writing a signature is in contact with a signature entry destination (hereinafter also referred to as a signature target). The writing pressure detection unit 12 is configured by, for example, a sheet-like pressure sensor. For example, a signature target is arranged on the main surface 12 a of the writing pressure detection unit 12. The pressure sensor detects, for example, that the writing instrument 20 and the signature object are in contact with each other when the resistance value or the capacitance changes due to the pressing force. Note that the writing pressure detection unit 12 is not limited to the pressure sensor, and it is only necessary to determine whether or not the writing tool 20 is in contact with the signature target. The writing pressure detection unit 12 may determine whether or not the writing tool 20 is in contact with the signature target from the analysis result of the image captured by the imaging device (not shown). Then, the writing pressure detection unit 12 outputs the determination result to the signature operation extraction unit 13. For example, the writing pressure detection unit 12 outputs different signals to the signature operation extraction unit 13 depending on whether the writing tool 20 and the signature target are in contact with each other.

  The writing pressure detection unit 12 is arranged in any position of the writing pressure detection unit 12 because the writing pressure detection unit 12 that may be larger or smaller than the signature target in plan view is larger than the signature target. Even so, it can be determined whether or not the writing instrument 20 is in contact with the signature target. Further, since the writing pressure detection unit 12 is smaller than the signature target, the personal authentication device 10 can be downsized. Moreover, in this Embodiment, although the pen pressure detection part 12 is rectangular plate shape, the shape of the pen pressure detection part 12 is not limited to this. Moreover, the writing pressure detection part 12 may have translucency.

  The signature target may be a sheet on which a writing area for writing a signature is printed, a touch panel provided in a tablet terminal that signs with an electronic pen, or the like. The writing pressure detection unit 12 may function as a touch panel for inputting a signature.

  1 shows an example in which one motion measuring unit 11 is arranged, a plurality of motion measuring units 11 may be arranged. The writing pressure detection unit 12 may be a pressure sensitive sensor attached to the writing instrument 20. Thereby, the writing pressure detection part 12 can detect that the writing instrument 20 contacts a signature object.

  The signature motion extraction unit 13 is a part corresponding to the time at which the writing pressure detection unit 12 determines that the writing tool 20 and the signature target are in contact from the information regarding the movement of the hand h output from the motion measurement unit 11. Extract information. That is, when the writing pressure detection unit 12 detects that the writing tool 20 is in contact with the signature target from the information regarding the movement of the hand h acquired from the motion measurement unit 11, the signature motion extraction unit 13 Information regarding the movement of the hand h measured by the motion measuring unit 11 is extracted. The extracted information is output to the signature information verification unit 15. The information related to the movement of the hand h output by the signature operation extraction unit 13 to the signature information verification unit 15 (extracted information in the above) is an example of verification source information. The collation source information is generated from information on the movement of the hand h measured by the current motion measurement unit 11.

  When the personal authentication device 10 does not include the writing pressure detection unit 12, the signature operation extraction unit 13 may output the measurement result acquired from the motion measurement unit 11 to the signature information verification unit 15 as it is. In this case, the information regarding the movement of the hand h that the signature action extraction unit 13 acquires from the motion measurement unit 11 is an example of collation source information. The signature operation extraction unit 13 is an example of an acquisition unit.

  Here, verification source information (time-series information) output from the signature operation extraction unit 13 to the signature information verification unit 15 will be described with reference to FIG.

  FIG. 3 is a diagram illustrating an example of time-series information output from the signature operation extraction unit 13 according to the present embodiment. FIG. 3 shows time-series information at five different times. In each of the five measurement results, the vertical direction indicates the distance from the motion measurement unit 11 to the hand h, and the horizontal direction indicates the relative speed of the hand h with respect to the motion measurement unit 11. It shows that the distance from the motion measurement unit 11 is farther as it goes up, and the relative speed that approaches the motion measurement unit 11 is faster as it goes to the right, and the relative speed that moves away from the motion measurement unit 11 as it goes to the left. It is fast. The signature operation extraction unit 13 outputs the distance from the motion measurement unit 11 and the distribution of the relative speed with respect to the motion measurement unit 11 in time series. FIG. 3 shows measurement results obtained from when the subject started writing the signature to when the signature was completed.

  FIG. 3 shows data obtained by extracting a reflected wave having a predetermined radio wave intensity or higher from the reflected wave reflected from the hand h of the subject who is signing the radio wave w emitted from the motion measuring unit 11. A bright part indicates that the radio wave intensity of the reflected wave is high. The motion measurement unit 11 outputs a plurality of measurement results in one signature.

  Referring again to FIG. 2, the signature information management unit 14 stores an identifier of a person who may sign a signature and collation target information that is information indicating the movement of the hand h at the time of signature of the individual in association with each other. Storage device. That is, the signature information management unit 14 stores in advance time-series information regarding the movement of the hand h at the time of signature for each individual. The signature target information is information stored in advance in the signature information management unit 14. The personal identifier is, for example, a name. The signature information management unit 14 is a storage device such as a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk device, or an SSD (Solid State Drive).

  Here, the verification target information (time series information) stored in the signature information management unit 14 will be described with reference to FIG.

  FIG. 4 is a diagram showing time-series information stored in the signature information management unit 14 according to the present embodiment.

  FIG. 4 shows an example in which identifiers of five persons and collation target information (time-series information) at the time of signature of the person are stored in association with each other. The personal name is stored in association with time-series information (matching target information) related to the movement of the hand h when the motion measuring unit 11 measures when the individual signs in advance. Specifically, the personal identifier “Mr. A” and the collation target information a are stored in association with each other, and “Mr. B” and the collation target information b are stored in association with each other. The same applies to “Mr. C” to “Mr. E”.

  Referring again to FIG. 2, the signature information verification unit 15 compares the verification source information acquired by the signature action extraction unit 13 with the verification target information stored in the signature information management unit 14, and displays the verification result. Output. The signature information collating unit 15 is the degree of belonging to an individual having information on the movement of the hand h most similar to the collation source information acquired from the signature operation extracting unit 13 from the collation target information stored in the signature information managing unit 14 ( The degree of coincidence) is output. That is, when the degree of attribution is calculated for each of a plurality of individuals, the signature information matching unit 15 outputs the maximum degree of belonging (that is, the value with the highest degree of matching) from among the plurality of degrees of belonging. The signature information verification unit 15 may output the individual's belonging degree and the individual identifier, or may output only the individual identifier. Note that the signature information verification unit 15 is not limited to outputting the degree of belonging to an individual who has information on the movement of the hand h that is most similar to the verification source information. The signature information verification unit 15 may output the degree of attribution to an individual who has information on the movement of the hand h that is secondly similar to the verification source information, or a plurality of degrees of attribution greater than or equal to a predetermined level of attribution. The individual and the degree of attribution of the individual may be output. Further, the signature information verification unit 15 may output a result collated with a notification unit (not shown) included in the personal authentication device 10 or a result of verification with a notification unit (not shown) outside the personal authentication device 10. May be output.

  The signature information verification unit 15 constructs machine learning data for personal authentication. In this embodiment, the signature information matching unit 15 uses a neural network for machine learning, but may use other machine learning methods. In the present embodiment, the signature information verification unit 15 uses, for example, LSTM (Long Term Short Memory) which is a kind of RNN (Recurrent Neural Network), and the time series information stored in the signature information management unit 14 is personal. Every learning. Then, the signature information matching unit 15 calculates the degree of attribution of the verification source information newly input from the signature operation extraction unit 13 with respect to the individual. Note that the signature information verification unit 15 may acquire time series information and the like for verification of the movement of the hand h by communication from the server device instead of the signature information management unit 14.

  The signature information collating unit 15 collates the collation source information shown in FIG. 3 with the collation target information shown in FIG. The verification source information and the verification target information are time series information. That is, since the personal authentication device 10 determines whether or not the person who is signing is the person himself / herself due to a difference in the process of writing the signature, even when impersonating the handwriting and impersonating the person himself / herself, The impersonation can be detected. Note that determining whether or not the person is the person includes determining whether or not there is collation source information corresponding to the signing person and collation target information having an attribution degree equal to or greater than a threshold. For example, when the degree of attribution is less than a threshold, the signature information matching unit 15 may determine that the person who has signed is impersonating. For example, the threshold value of the degree of attribution may be set in advance and stored in the signature information management unit 14. The personal authentication device 10 is a device that performs personal authentication using the measurement result of the movement of the hand h when signing, and does not use handwriting for personal authentication.

  The signature information registration unit 16 registers the individual identifier and the time-series information corresponding to the individual in the signature information management unit 14 in association with each other. That is, the signature information registration unit 16 stores the identifier of a person who may sign the signature and the time-series information regarding the movement of the hand h acquired in advance in the signature information management unit 14 in association with each other. The signature information registration unit 16 obtains an individual identifier via a user interface (not shown). For example, the signature information registration unit 16 acquires the name of the individual as the individual identifier. The user interface is, for example, a keyboard. The user interface may be connected only when performing an operation of storing information in the signature information management unit 14. In addition, the signature information registration unit 16 may acquire an individual identifier acquired by a device external to the personal authentication device 10 by communication.

  Note that the personal authentication device 10 is not limited to having all the above-described components. The personal authentication device 10 only needs to include the signature operation extraction unit 13, the signature information management unit 14, and the signature information verification unit 15. For example, the personal authentication device 10 may acquire a measurement result from the external motion measurement unit 11 and may acquire a detection result from the external writing pressure detection unit 12.

[2. Operation of personal authentication device]
The personal authentication device 10 according to the present embodiment includes a registration mode in which the signature information management unit 14 stores time-series data to be verified, and a determination mode in which it is determined whether or not the signing person is the person. Have First, the operation of the personal authentication device 10 regarding the registration mode will be described with reference to FIG. 5A. That is, an operation of storing the verification target information in the signature information management unit 14 will be described. Note that the registration mode and the verification mode may be switched by, for example, a switch (not shown) provided in the personal authentication device 10. In addition, when the signature information registration unit 16 acquires an individual identifier to be registered, a predetermined period is set as a registration mode from the time when the identifier is acquired, and after the predetermined period, the determination mode may be automatically changed. Good.

  FIG. 5A is a flowchart showing a procedure for storing time-series information in signature information management unit 14 according to the present exemplary embodiment.

  As shown in FIG. 5A, first, the personal authentication device 10 acquires an identifier of a registered individual (S11). Specifically, the signature information registration unit 16 acquires an individual's name.

  Next, the signature information registration unit 16 acquires information (time-series information) regarding the movement of the hand h from the signature operation extraction unit 13 (S12). Specifically, the person corresponding to the identifier acquired in step S11 (that is, the person) signs the signature, and the motion measuring unit 11 measures the movement of the hand h when signing. The signature motion extraction unit 13 extracts information on the movement of the hand h output to the signature information registration unit 16 from the measurement result measured by the motion measurement unit 11 according to the detection result of the writing pressure detection unit 12 at that time. .

  In the registration mode, the signature operation extraction unit 13 outputs information regarding the movement of the hand h to the signature information registration unit 16. The signature information registration unit 16 associates an individual identifier (for example, A to E shown in FIG. 4) with information (a to e shown in FIG. 4) regarding the movement of the person's hand h, and signs information management unit 14 (S13). The information regarding the movement of the hand h is time-series information measured at at least two or more different times in the famous name. That is, the collation target information is time series information.

  In the registration mode, the signature information verification unit 15 does not perform verification. In the registration mode, the signature operation extraction unit 13 may output information regarding the movement of the hand h only to the signature information registration unit 16.

  Next, operation | movement of the personal authentication apparatus 10 regarding determination mode is demonstrated, referring FIG. 5B.

  FIG. 5B is a flowchart showing a personal authentication procedure in personal authentication device 10 according to the present embodiment.

  As shown in FIG. 5B, first, the signature action extraction unit 13 acquires the movement of the hand h in the signature of the person measured by the motion measurement unit 11 (S21). That is, in step S21, the signature action extraction unit 13 acquires information indicating the movement of the hand h from the motion measurement unit 11 that measures the movement of the hand h when signing. The movement of the hand h during signature includes, for example, information on the movement of the hand h when the writing instrument 20 and the signature target are not in contact. For example, the movement of the hand h when the writing instrument 20 is not in contact with the signature target immediately before signing, and the hand when the writing instrument 20 leaves the signature target to move to the next character during the signature. The movement of h is also included. Step S21 is an example of an acquisition step.

  Then, the signature motion extraction unit 13 extracts information about the movement of the hand h measured during the period when the writing pressure is detected from the information about the movement of the hand h measured by the motion measurement unit 11 (S22). This makes it possible to accurately extract the movement of the hand h when writing a character. Information regarding the extracted movement of the hand h (an example of verification source information) is output to the signature information verification unit 15. The verification source information is not output to the signature information registration unit 16.

  Then, the signature information collating unit 15 collates the extracted information related to the movement of the hand h and the information related to the movement of the hand h registered in advance (S23). The signature information collating unit 15 collates the collation source information acquired in step S21 with collation target information indicating the movement of the individual hand h associated with the individual identifier. Step S23 is an example of a collation step.

  Then, the signature information verification unit 15 outputs a verification result (S24). For example, the signature information verification unit 15 outputs the verification result to a notification unit included in the personal authentication device 10. A notification part performs notification according to the acquired collation result. When the notification unit is a display device (for example, a liquid crystal display device), the notification is performed by displaying the individual identifier and the degree of belonging. An alerting | reporting part may perform alerting | reporting which shows that it is impersonation, when an attribution degree is less than a threshold value. An alerting | reporting part may have a speaker and may emit the sound which shows that it is impersonation, for example. In addition, the notification unit includes a light emitting device and may perform light emission indicating impersonation. Step S24 is an example of an output step.

  In the above description, the personal authentication device 10 is not limited to measuring the movement of the hand h signed with the writing instrument 20. As shown in FIG. 6, the personal authentication device 10 can also be applied to, for example, directly signing with a finger without using the writing instrument 20. FIG. 6 is a schematic diagram showing a state of signing without using the writing instrument 20 in the personal authentication device 10 according to the present embodiment.

  As a result, the finger f and the writing pressure detection unit 12 are in surface contact, so that the writing pressure detection unit 12 can easily detect the writing pressure (finger pressure). That is, the detection accuracy of the writing pressure detection unit 12 is improved.

  In the above description, the writing instrument 20 is described as being covered with a radio wave absorber that absorbs the radio wave w, but the present invention is not limited thereto. The writing instrument 20 may not be at least partially covered with the radio wave absorber.

  FIG. 7 is a schematic diagram illustrating another example of the writing instrument according to the present embodiment.

  As shown in FIG. 7, the writing instrument 21 includes an absorption portion 21a and a reflection portion 21b. The absorbing portion 21a is a portion of the writing instrument 21 that is covered with a radio wave absorbing material that absorbs the radio wave w, and is shown in black in FIG. The reflecting portion 21b is a portion of the writing instrument 21 that is not covered with a radio wave absorber that absorbs the radio wave w, and is shown in white in FIG. That is, at least a part of the writing instrument 21 reflects the radio wave w. Thereby, in addition to the movement of the hand h, the motion measurement part 11 can measure the movement of the writing instrument 21 (specifically, the reflection part 21b). In other words, the verification source information includes information indicating the movement of the hand h and the movement of the writing instrument 21. Even if the movement of the hand h is the same, the measurement result in the motion measurement unit 11 is different if the position and number of the reflection units 21b in the writing instrument 21 are different. When a person other than the person performs the signature without using the writing instrument 21 dedicated to the person, it can be determined that the impersonation is more accurate. When the dedicated writing tool 21 is used, the verification target information stored in the signature information management unit 14 may be information acquired using the writing tool 21.

[3. Effect etc.]
As described above, according to the personal authentication device 10, it is possible to collate the movement of the hand h when the signature is made (verification source information) and the movement of the hand h that is stored in advance (verification target information). Since the collation source information and the collation target information are time-series information, for example, even if a signature is imitated by handwriting, it is possible to collate whether the person is the person or not by the difference in the movement of the hand h in the signature. it can. Further, when the writing order of characters is different between the person himself and the person other than the person himself / herself, it is not possible to determine whether or not he / she is the person himself / herself by handwriting alone. On the other hand, since the personal authentication device 10 determines whether or not the user is the person from the time-series information of the movement of the hand h, if the character writing order is different, it can be determined to be impersonation. .

  Therefore, the personal authentication device 10 according to an aspect of the present disclosure can prevent impersonation by using the motion information of the human hand h as biometric information by non-contact motion measurement.

(Embodiment 2)
The personal authentication device 100 according to the present embodiment will be described with reference to FIG. Note that this embodiment will mainly describe differences from Embodiment 1, and may omit or simplify description of configurations similar to those of Embodiment 1.

  FIG. 8 is a schematic diagram showing a schematic configuration of personal authentication apparatus 100 according to the present embodiment.

  As shown in FIG. 8, personal authentication device 100 according to the present embodiment is characterized in that radio wave absorber 110 is further provided in addition to personal authentication device 10 according to the first embodiment.

  The radio wave absorber 110 suppresses radio waves (disturbances) from the outside of the personal authentication device 100. The radio wave absorber 110 suppresses disturbances other than the movement of the hand h. The radio wave absorber 110 is configured to be covered with, for example, a radio wave absorber that absorbs the radio wave w emitted from the motion measurement unit 11.

  The radio wave absorber 110 is arranged at a position that does not interfere with the signature when a person signs the signature. As shown in FIG. 8, when a right-handed person signs, the radio wave absorber 110 is not arranged on the right side (Y-axis plus side) and the near side (X-axis plus side) of the writing pressure detection unit 12. . As a result, disturbance can be suppressed without disturbing the signature. The radio wave absorber 110 is a plate-like member and is provided upright from the end of the writing pressure detector 12. The radio wave absorber 110 may be disposed in contact with the motion measurement unit 11. Thereby, it can suppress that the electromagnetic wave used as disturbance enters between between the motion measurement part 11 and the electromagnetic wave absorption part 110. FIG. The radio wave absorber 110 is an example of a guard unit.

  Although FIG. 8 shows an example in which the radio wave absorber 110 is arranged on two sides of the outer periphery of the rectangular pen pressure detector 12 in plan view, the present invention is not limited to this. The radio wave absorber 110 may be disposed on at least one side of the outer periphery of the writing pressure detector 12.

  As described above, since the personal authentication device 100 includes the radio wave absorber 110, the motion measurement unit 11 can more accurately measure the movement of the hand h. Therefore, by collating the collation source information obtained by measuring the movement of the hand h more accurately and the collation target information, it is possible to more accurately determine whether it is impersonation.

(Embodiment 3)
A personal authentication apparatus 200 according to the present embodiment will be described with reference to FIG. In the above-described embodiment, the personal authentication device in the case where a right-handed person performs a signature has been described. In this embodiment, a personal authentication device in the case where a left-handed person signs a signature will be described. Specifically, a personal authentication device 200 that allows right-handed and left-handed persons to sign with one personal authentication device will be described. Note that in this embodiment, differences from the second embodiment will be mainly described, and description of the same configuration as that of the second embodiment may be omitted or simplified.

  FIG. 9 is a schematic diagram showing a schematic configuration of personal authentication apparatus 200 according to the present embodiment. FIG. 9 is a view of the personal authentication device 200 as viewed from the Z-axis minus side. In addition, the motion measuring unit 11 and the radio wave absorbing unit 110 are arranged on the main surface 12a on the Z-axis plus side of the writing pressure detecting unit 12 as in FIG. A description of the principal surface 12a on the Z-axis plus side of the writing pressure detection unit 12 is omitted. In addition to the personal authentication device 100 according to the second embodiment, the personal authentication device 200 according to the present embodiment has a motion measurement unit 211 and a radio wave absorption unit 210 on the main surface 12b on the negative side of the Z-axis of the writing pressure detection unit 12. It has the characteristic in the point provided with. The main surface 12b on the Z axis minus side of the writing pressure detection unit 12 is an example of a second main surface.

  The motion measurement unit 221 measures the movement of the hand h on the main surface 12b. The motion measurement unit 221 is the main surface 12b and is disposed at a position overlapping the motion measurement unit 11 in plan view. In the present embodiment, the motion measurement unit 221 is disposed at the corner c of the main surface 12b. The radio wave emitted from the motion measurement unit 221 is the same as the radio wave emitted from the motion measurement unit 11. The motion measurement unit 221 is an example of a second motion measurement unit.

  Note that the position of the motion measurement unit 221 relative to the motion measurement unit 11 is not limited to the above. The motion measuring unit 221 is positioned diagonally with the motion measuring unit 11 in plan view of the writing pressure detecting unit 12 (in FIG. 9, the X axis plus side and the Y axis of the main surface 12b of the writing pressure detecting unit 12). You may arrange | position in the corner | angular part of the plus side.

  The radio wave absorber 210 has the same function as the radio wave absorber 110 of the second embodiment, and suppresses radio waves (disturbances) from the outside of the personal authentication device 200. The radio wave absorber 210 is configured to be covered with, for example, a radio wave absorber that absorbs the radio wave w emitted from the motion measurement unit 211. The radio wave absorber 210 is arranged at a position that does not prevent a left-handed person from signing.

  The personal authentication device 200 as described above can measure the movement of the hand h under the same condition when signing with the right hand and when signing with the left hand by reversing the writing pressure detection unit 12 from front to back. It becomes. The personal authentication device 200 is arranged so that the main surface 12a faces upward for a person who signs with the right hand (for example, see FIG. 8). The motion of the right hand h when the motion measuring unit 11 signs with the right hand on the main surface 12a is measured. At this time, the motion measuring unit 11 receives a reflected wave reflected mainly by the finger of the right hand. Note that the upper direction is, for example, a vertical upper direction. The fact that the main surface 12a faces upward means that the personal authentication device 200 is arranged on the main surface 12a so that the signature object can be arranged. The main surface 12a is a placement surface on which a signature target is placed when signing with the right hand. The right hand is an example of one hand and the left hand is an example of the other hand.

  Further, the personal authentication device 200 is arranged so that the main surface 12b faces upward with respect to a person who signs with the left hand (for example, see FIG. 9). Specifically, the state shown in FIG. 9 is obtained by rotating the writing pressure detection unit 12 180 degrees around the X axis from the state shown in FIG. The movement of the left hand when the motion measurement unit 221 signs with the left hand on the main surface 12b is measured. At this time, the motion measuring unit 221 receives a reflected wave reflected mainly by the finger of the left hand. As a result, the movement of the right hand and the movement of the left hand can be measured by the reflected wave reflected under the same condition (the same position on the hand). Individual authentication can be performed with equal accuracy. The main surface 12b is a placement surface on which a signature target is placed when signing with the left hand.

  On the other hand, when the personal authentication device does not include the motion measurement unit 221 and the motion measurement unit 11 as shown in FIG. 8 measures the movement of the left hand, the motion measurement unit 11 is reflected mainly by the back of the left hand. Receive reflected waves. In other words, since the right hand movement and the left hand movement are measured under different conditions (different positions in the hand), the personal authentication using the right hand movement and the personal authentication using the left hand movement are equally accurate. May not be possible.

  For example, only one of the motion measuring units 11 and 221 performs measurement. While the motion measurement unit 11 performs measurement, the motion measurement unit 221 does not perform measurement. For example, the motion measurement unit 221 does not emit radio waves while the motion measurement unit 11 performs measurement. The personal authentication device 200 includes a contact sensor (not shown), and by detecting which of the main surfaces 12a and 12b is in contact with the installation surface on which the personal authentication device 200 is installed, Control may be performed, or other methods may be used.

  The signature operation extraction unit 13 acquires measurement results obtained by measuring the movement of the hand h from the motion measurement units 11 and 221. The signature operation extraction unit 13 acquires a measurement result from one of the motion measurement units 11 and 221 at a certain moment. The signature operation extraction unit 13 acquires a measurement result from the motion measurement unit 11 when the hand h of the person who is signing is the right hand. Then, the signature action extraction unit 13 acquires collation source information from the measurement result measured by the motion measurement unit 11 and the detection result of the writing pressure detection unit 12. In addition, the signature operation extraction unit 13 acquires a measurement result from the motion measurement unit 221 when the signing person's hand h is the left hand. Then, the signature operation extraction unit 13 acquires collation source information from the measurement result measured by the motion measurement unit 221 and the detection result of the writing pressure detection unit 12. The verification source information generated by the signature operation extraction unit 13 is output to the signature information verification unit 15.

  As a result, it is possible to perform personal authentication with the same accuracy regardless of whether the right hand or the left hand is signed by one personal authentication device 200.

  Note that at least one of the radio wave absorber 110 provided on the main surface 12a and the radio wave absorber 210 provided on the main surface 12b may not be arranged.

  Note that, in the above, a right-handed person and a left-handed person can perform a signature with one personal authentication device 200 by arranging a motion measuring unit on each of the main surface 12a and the main surface 12b of the writing pressure detection unit 12. Although an example has been described, it is not limited thereto. When the planar view shape of the writing pressure detection unit 12 is substantially the same before and after the writing pressure detection unit 12 is rotated by 90 °, a motion measurement unit is disposed on one of the main surface 12a and the main surface 12b. That's fine. For example, when the planar view shape of the writing pressure detection unit 12 is a square, the motion measurement unit may be arranged on one main surface.

  Note that, in the above description, an example is described in which the writing pressure detection unit 12 is reversed so that the movement of the hand h can be measured under the same conditions when signing with the right hand and when signing with the left hand. However, it is not limited to this. For example, when the motion measurement unit 11 and the radio wave absorption unit 110 shown in FIG. 8 are detachably attached to the writing pressure detection unit 12, the positions of the motion measurement unit 11 and the radio wave absorption unit 110 are changed to the positions shown in FIG. May be. Specifically, the motion measurement unit 11 and the radio wave absorption unit 110 may be arranged so that the motion measurement unit 11 is located at the corners on the X axis minus side and the Y axis plus side on the main surface 12a. 8 is an example of the first motion measurement unit, and the corners on the X axis minus side and the Y axis plus side in the writing pressure detection unit 12 shown in FIG. The motion measurement unit 11 arranged in is an example of a second motion measurement unit.

  This makes it possible to measure the movement of the hand h under the same conditions when signing with the right hand and when signing with the left hand, without inverting the writing pressure detection unit 12. In other words, it is possible to realize a personal authentication device that can easily measure the movement of the hand h when signing with the right hand and when signing with the left hand.

  When the motion measurement unit 11 can be replaced, the personal authentication device has a function of specifying the position and posture where the motion measurement unit 11 is arranged. The method for specifying the position and orientation at which the motion measurement unit 11 is arranged is not particularly limited, but may be detected by the writing pressure detection unit 12, for example. For example, when the writing pressure detection unit 12 detects the writing pressure continuously for a predetermined time or more on the X-axis plus side and the Y-axis plus side on the main surface 12a, the signature measuring unit 13 detects the writing pressure. It can be determined that the X-axis minus side and Y-axis minus side corners on the surface 12a (positions of the motion measurement unit 11 shown in FIG. 8) are arranged. The specification of the position and posture where the motion measuring unit 11 is arranged is not limited to the above. For example, the personal authentication device may acquire an image obtained by imaging the personal authentication device from an imaging device installed outside, and specify the position and orientation on the main surface 12a of the motion measurement unit 11 from the acquired image. .

(Embodiment 4)
A personal authentication apparatus 300 according to the present embodiment will be described with reference to FIG. In the present embodiment, differences from Embodiment 1 will be mainly described, and description of the same configuration as Embodiment 1 may be omitted or simplified.

  FIG. 10 is a diagram showing a schematic configuration of personal authentication apparatus 300 according to the present embodiment. Specifically, FIG. 10 is a schematic view of the personal authentication device 300 viewed from the Z-axis plus side. Further, the components other than the pen pressure detection unit 312 are not shown.

  The personal authentication device 300 according to the present embodiment includes a writing pressure detection unit 312 instead of the writing pressure detection unit 12 of the first embodiment. In the writing pressure detection unit 312, an area for signing is clearly shown on the writing pressure detection unit 312. Specifically, the pen pressure detection unit 312 shows a guideline 301 indicating a position where a signature object is arranged in the pen pressure detection unit 312. The shape of the guideline 301 is not limited to a broken line, and may be a solid line. Further, the guideline 301 is not limited to being formed in an L shape, and may be a straight line or a frame. The guideline 301 is formed in a predetermined shape by, for example, printing.

  By arranging the signature target (for example, signature paper) corresponding to the guideline 301, even if the signature target and the writing pressure detection unit 12 have different sizes, the signature target on the writing pressure detection unit 12 The position can be made substantially constant. In other words, the area for signing the signature object on the writing pressure detection unit 12 can be made substantially constant. For example, when the guideline 301 is L-shaped, the arrangement corresponding to the guideline is to place a signature target along the guideline 301. When the guideline 301 is frame-shaped, The signature object is arranged so as to be within the guideline 301.

  The motion measuring unit 11 measures the movement of the hand h when a person is signing the signature target arranged corresponding to the guideline 301. The signature operation extraction unit 13 acquires verification source information from the measurement result of the motion measurement unit 11 and the detection result of the writing pressure detection unit 12, and outputs the acquired verification source information to the signature information verification unit 15.

  Thereby, the area | region which signs the signature object on the pen pressure detection part 12 can be estimated. The range of the radio wave w emitted by the motion measurement unit 11 can be set according to the area to be signed.

  In the above description, the example in which the guideline 301 is formed in the writing pressure detection unit 312 has been described. However, the guideline may be formed on a signature target. Guidelines for the installation position of the writing pressure detection unit 12 may be formed in advance on the signature target by printing or the like. Thereby, the position which installs the pen pressure detection part 12 can be determined easily.

(Embodiment 5)
A personal authentication apparatus 400 according to the present embodiment will be described with reference to FIGS. 11 and 12. In the present embodiment, differences from Embodiment 1 will be mainly described, and description of the same configuration as Embodiment 1 may be omitted or simplified.

  FIG. 11 is a schematic diagram showing a schematic configuration of personal authentication apparatus 400 according to the present embodiment. Specifically, FIG. 11 is a diagram of the personal authentication device 400 viewed from the Z-axis plus side. In addition, components other than the pen pressure detection unit 12 and the display unit 403 are not shown. FIG. 12 is a block diagram showing a functional configuration of personal authentication apparatus 400 according to the present embodiment.

  The personal authentication device 400 according to the present embodiment is characterized in that in addition to the personal authentication device 10 of the first embodiment, the personal authentication device 400 further includes an identifier acquisition unit 401, a control unit 402, and a display unit 403.

  An identifier acquisition unit 401 is a user interface that acquires an identifier of an individual to sign. The identifier acquisition unit 401 is realized by, for example, a push button, a keyboard, or a touch panel.

  The control unit 402 reads the signature corresponding to the identifier acquired by the identifier acquisition unit 401 from the signature information management unit 14 and displays the read signature on the display unit 403. In the present embodiment, the signature information management unit 14 stores an identifier, verification target information that is information relating to the movement of the hand h, and a signature. The signature information registration unit 16 stores the identifier, the verification target information that is information about the movement of the hand h, and the signature in advance in the signature information management unit 14 in advance.

  The display unit 403 is a display device that displays a signature corresponding to the identifier acquired by the identifier acquisition unit 401, and displays the signature under the control of the control unit 402. The display unit 403 may be a UI (User Interface) display or the like, and may be an LCD (Liquid Crystal Display), an organic or inorganic EL (Electro Luminescence) display, for example. The display unit 403 may be a display unit included in a terminal device such as a tablet terminal. The terminal device includes, for example, an identifier acquisition unit, a control unit, and a display unit. The control unit displays a signature corresponding to the individual identifier acquired by the identifier acquisition unit of the terminal device on the display unit of the terminal device. Then, the terminal device on which the signature is displayed may be placed on the writing pressure detection unit 12 in an overlapping manner.

  The display unit 403 is arranged on the main surface opposite to the main surface on which the signature target is arranged in the writing pressure detection unit 12. In the present embodiment, the display unit 403 is disposed on the surface on the negative side of the Z axis of the writing pressure detection unit 12. Since the writing pressure detection unit 12 has translucency, the signature 403a displayed on the display unit 403 is visible when the writing pressure detection unit 12 is viewed from the Z axis plus side. Note that the display unit 403 is not limited to a display device. The display unit 403 may be a sheet on which a signature 403a is printed.

  In the personal authentication device 400 as described above, the person performs an operation of tracing the signature 403 a displayed on the display unit 403 from the writing pressure detection unit 12. The motion measuring unit 11 measures the movement of the hand h when tracing the signature. The signature operation extraction unit 13 acquires verification source information from the measurement result of the motion measurement unit 11 and the detection result of the writing pressure detection unit 12, and outputs the acquired verification source information to the signature information verification unit 15.

  If the person who is signing is the person, it is possible to trace the signature with the same movement of the hand h as usual. Specifically, the signature can be traced with the same movement of the hand h as when the measurement result of the movement of the hand h is registered via the signature information registration unit 16. On the other hand, when a person other than the person signs the signature, it is possible to trace the handwriting, but it is difficult to smoothly trace a signature that is not familiar to writing. By measuring the movement of the hand h when tracing the signature displayed in advance, it is possible to more significantly measure the difference in the movement of the hand h between the person himself and the person other than the person himself. The accuracy of collation is improved.

(Other embodiments)
As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and can be applied to modified examples of the embodiments in which modifications, replacements, additions, omissions, and the like are appropriately performed, or other embodiments. Moreover, it is also possible to combine the components described in the embodiment to form a new embodiment or modification.

  For example, in the above-described embodiment, the information stored in the signature information management unit has been described using the signature information registration unit. However, the present invention is not limited to this. The personal authentication device may not include the signature information registration unit, and may acquire information stored in the signature information management unit from the outside. For example, the personal authentication device may acquire the information from the server device via communication or may acquire the information via a recording medium.

  In the above embodiment, the signature motion extraction unit extracts information about the movement of the hand h when the writing pressure detection unit detects contact from the information about the movement of the hand h measured by the motion measurement unit. Although described, it is not limited to this. For example, the motion measurement unit may measure the movement of the hand h only when the writing pressure detection unit detects contact. In other words, the motion measurement unit may measure the movement of the hand h when the writing instrument and the signature target are in contact with each other.

  Each processing unit included in the personal authentication device according to the above embodiment is typically realized as an LSI that is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Further, the circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. An FPGA (Field Programmable Gate Array) that can be programmed after manufacturing the LSI or a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.

  In the above-described embodiment, each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

  Furthermore, the technology of the present disclosure may be the above-described program or a non-transitory computer-readable recording medium on which the above-described program is recorded. Needless to say, the program can be distributed via a transmission medium such as the Internet.

  Further, the numbers such as the ordinal numbers and the quantities used in the above are examples for specifically explaining the technology of the present disclosure, and the present disclosure is not limited to the illustrated numbers. In addition, the connection relationship between the constituent elements is exemplified for specifically explaining the technology of the present disclosure, and the connection relationship for realizing the functions of the present disclosure is not limited thereto.

  In addition, division of functional blocks in the block diagram is an example, and a plurality of functional blocks are realized as one functional block, one functional block is divided into a plurality of parts, or some functions are transferred to other functional blocks. May be. In addition, the functions of a plurality of functional blocks having similar functions may be processed in parallel or in time division by a single hardware or software.

  The personal authentication device and the like according to the present disclosure can be widely used for devices that perform biometric authentication when signing.

10, 100, 200, 300, 400 Personal authentication device 11 Motion measurement unit (first motion measurement unit)
12, 312 Writing pressure detector 12a Main surface (first main surface)
12b Main surface (second main surface)
13 Signature action extraction unit (acquisition unit)
14 Signature information management unit 15 Signature information verification unit 16 Signature information registration unit 20, 21 Writing instrument 21a Absorption unit 21b Reflection unit 110, 210 Radio wave absorption unit (guard unit)
221 Motion measurement unit (second motion measurement unit)
301 Guideline 401 Identifier Acquisition Unit 402 Control Unit 403 Display Unit 403a Signature c Corner (Predetermined Position)
f finger h hand w radio wave

Claims (12)

An acquisition unit that acquires collation source information indicating the movement of the hand from a first motion measurement unit that measures the movement of the hand when signing;
A signature information management unit that stores an identifier of a person and verification target information indicating movement of the person's hand in association with each other;
A collation source information acquired by the acquisition unit and a collation target information stored in the signature information management unit, and a signature information collation unit that outputs a collation result.
Personal authentication device. The acquisition unit acquires the verification source information from the first motion measurement unit that measures the movement of the hand at a distance and relative speed from a millimeter wave radar that uses a millimeter wave band radio wave,
The personal authentication device according to claim 1. The acquisition unit acquires a detection result of whether or not the writing instrument and the signature target are in contact from a writing pressure detection unit that detects whether or not the writing tool for signing and the signature target are in contact with each other. ,
The collation source information acquired by the acquisition unit includes information indicating the hand movement measured by the first motion measurement unit, wherein the writing pressure detection unit is in contact with the writing tool and the signature target. It is the information that extracted the part measured when detecting that
The personal authentication device according to claim 1 or 2. In the writing pressure detection unit, a guideline indicating a position to place the signature object in the writing pressure detection unit is shown,
The acquisition unit acquires the movement of the hand in the signature target arranged corresponding to the guideline as the verification source information.
The personal authentication device according to claim 3, which is dependent on claim 2. The writing instrument has a reflection unit that reflects the radio wave emitted by the first motion measurement unit,
The verification source information is information indicating movement of the hand and movement of the writing instrument.
The personal authentication device according to claim 3 or claim 4 dependent on claim 2. A guard unit that further prevents radio waves from entering the personal authentication device from the outside of the personal authentication device;
The personal authentication device according to claim 5. The writing pressure detection unit is plate-shaped and has a first main surface and a second main surface facing away from the first main surface,
The first motion measurement unit is disposed at a predetermined position on the first main surface,
The second motion measurement unit is the second main surface, and is arranged at a position overlapping the first motion measurement unit in plan view,
The acquisition unit acquires 1) the hand movement measured by the first motion measurement unit on the first main surface as the verification source information, or 2) the second main surface acquires the second Obtaining the movement of the hand measured by the motion measuring unit as the verification source information;
The personal authentication device according to any one of claims 3 to 6. An identifier acquisition unit for acquiring an identifier of an individual to sign;
A display unit for displaying the signature of the individual corresponding to the identifier input to the identifier acquisition unit,
The acquisition unit acquires the movement of the hand when tracing the displayed signature as the verification target information;
The personal authentication apparatus of any one of Claims 1-7. The signature information verification unit is associated with the verification target information indicating the hand movement most similar to the verification source information acquired by the acquisition unit from the signature information management unit as a result of the verification. Output the identifier of the individual and the degree of belonging to the individual,
The personal authentication apparatus of any one of Claims 1-8. A signature information registration unit that stores the personal identifier in association with information indicating the movement of the hand at the time of signature of the individual in the signature information management unit;
The personal authentication apparatus of any one of Claims 1-9. An acquisition step of acquiring collation source information indicating the movement of the hand from a motion measurement unit that measures the movement of the hand when signing;
A collation step of collating the collation source information acquired in the acquisition step with collation target information indicating movement of the individual hand associated with the individual identifier;
An output step of outputting the collated result,
Personal authentication method.   A program for causing a computer to execute the personal authentication method according to claim 11.