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WO2020184763A1 - Procédé et système anti-mystification d'un dispositif comprenant un capteur d'empreintes digitales - Google Patents

Procédé et système anti-mystification d'un dispositif comprenant un capteur d'empreintes digitales Download PDF

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Publication number
WO2020184763A1
WO2020184763A1 PCT/KR2019/003049 KR2019003049W WO2020184763A1 WO 2020184763 A1 WO2020184763 A1 WO 2020184763A1 KR 2019003049 W KR2019003049 W KR 2019003049W WO 2020184763 A1 WO2020184763 A1 WO 2020184763A1
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Prior art keywords
fingerprint
user
sensor
light
biometric
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English (en)
Korean (ko)
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민원기
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Priority to CN201980095500.9A priority Critical patent/CN113785291A/zh
Publication of WO2020184763A1 publication Critical patent/WO2020184763A1/fr
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3226—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using a predetermined code, e.g. password, passphrase or PIN
    • H04L9/3231—Biological data, e.g. fingerprint, voice or retina

Definitions

  • the present invention relates to a method and system for preventing spoofing of a mobile device using body information of a user using a fingerprint recognition sensor.
  • it relates to a method and apparatus for efficiently supporting anti-spoofing by measuring a user's oxygen saturation using a PPG sensor module (optical sensor module) mounted on a mobile terminal.
  • PPG sensor module optical sensor module
  • wireless LAN access point (AP) spoofing attacks other systems by tricking the source IP address when transmitting packets, so the attacker can hide his or her information and avoid detection.
  • wireless LAN AP spoofing is tricking an unauthorized person by changing their IP address to the IP address of a trusted host between two systems in a trust relationship, and can easily disable the service that authenticates with only the IP address. .
  • fingerprints are unique features in the human body and have immutability, uniqueness, and convenience that do not change throughout life.
  • fingerprint identification technology is already widely applied to equipment such as collection systems, access control systems, and smartphones, and capacitive fingerprint identification technology is steadily spreading in application functions such as mobile phone fingerprint unlocking and mobile phone online fingerprint payment.
  • the demand for the safety of fingerprints is also increasing.
  • Fingerprint identification technology based on capacitance is at risk of cracking, and by acquiring a fingerprint image and printing a fake fingerprint using special materials, it can break the fingerprint identification function of various mobile phone models. Therefore, there is a need for a more secure fingerprint identification technology.
  • PPG photo plethysmo graphy
  • the PPG signal can be measured from the user's finger or earlobe. That is, the detector detects light transmitted from the light source to the finger or earlobe, thereby detecting the user's PPG signal.
  • Patent Document 1 Japanese Patent Laid-Open Publication No. 2006-074104 (published on March 16, 2006)
  • the technical problem of the present invention can provide a method of performing anti-spoofing using fingerprint information, which is the user's biometric identification information, in order to prevent erroneous authentication due to a user who is erroneously recognized by spoofing.
  • a device that performs anti-spoofing through a fingerprint sensor may be provided by an initiation, and the device is included on one side of the device, a biometric sensor that simultaneously senses a plurality of biometric information of a user, and a fingerprint image obtained from the biometric sensor. And a security information generation unit that generates user security information by combining oxygen saturation, a memory that stores information on the biometric information of a user registered in advance, and whether the user is authentic by comparing the user security information with the biometric information of the user registered in advance.
  • the biometric sensor may include a forgery determination unit that determines a user's fingerprint image, and a photo-plethysmography (PPG) sensor that measures a user's blood oxygen saturation.
  • PPG photo-plethysmography
  • the present invention can provide an anti-spoofing method using a device including a fingerprint sensor, and the present method simultaneously senses a plurality of biometric information of a user using a biometric sensor included on one side of the device. Steps, comprising the step of creating user security information by combining the fingerprint image and oxygen saturation obtained from the biometric sensor, and determining whether the user is authentic or not by comparing the user security information with the biometric information of the user registered in advance,
  • the sensor may be characterized in that a fingerprint sensor that senses a user's fingerprint image and a photo-plethysmography (PPG) sensor that measures a user's blood oxygen saturation are combined.
  • PPG photo-plethysmography
  • a recording medium recording a program necessary for executing the method of the present invention may be included.
  • a mobile terminal it is possible to enhance the security of a mobile terminal by detecting whether a fake fingerprint has been detected using a fingerprint and oxygen saturation, which are biometric identification information.
  • the mobile device may have a function of measuring oxygen saturation and user authentication at the same time, so that it is possible to perform identity authentication by measuring the oxygen saturation level using the mobile device and recognizing a fingerprint of a finger. Therefore, it is possible to perform user authentication more efficiently and stably while simultaneously and conveniently measuring the oxygen saturation level without requiring a separate oxygen saturation meter.
  • a spoofing attack through fingerprint recognition can be prevented by increasing the accuracy of checking the correspondence between a user's registered fingerprint and the recognized fingerprint.
  • the present invention doubles security using not only fingerprints but also the user's oxygen saturation, so the security of the device can be enhanced.
  • a filter having two optical characteristics in one filter it is possible to complexly sense user biometric information, which is economical and efficient.
  • FIG. 1 is a diagram illustrating a device including a fingerprint sensor of the present invention by way of example.
  • FIG. 2 is a diagram for explaining the configuration of a device for performing anti-spoofing according to the present invention according to an embodiment.
  • FIG. 3 is a view for explaining the structure of the biosensor of the present invention according to an embodiment.
  • FIG. 4 is a diagram illustrating a configuration of a device including a pinhole layer according to an exemplary embodiment.
  • FIG. 5 is a diagram for comparing a characteristic of a red signal and a characteristic of a near-infrared signal according to an embodiment.
  • FIG. 6 is a diagram illustrating a change in oxygen saturation according to a ratio of a signal according to an exemplary embodiment.
  • FIG. 7 is a graph showing a change in a light absorption coefficient according to a wavelength according to an exemplary embodiment.
  • FIG. 8 is a diagram for describing a method of detecting a forged fingerprint according to an exemplary embodiment.
  • FIG. 9 is a diagram for describing characteristics of pixels of a fingerprint sensor according to an exemplary embodiment.
  • a security information generation unit that generates user security information by combining a fingerprint image obtained from a biometric sensor and a user's blood oxygen saturation, and information on the biometric information of a user registered in advance It includes a memory to store and a forgery determination unit to determine whether the user is authentic or not.
  • the biometric sensor may be implemented by combining a fingerprint sensor that senses a user's fingerprint image and a photo-plethysmography (PPG) sensor that measures a user's blood oxygen saturation.
  • PPG photo-plethysmography
  • the device 100 includes a touch panel assembly including a biometric sensor.
  • Device 100 includes other sensors 21 such as a camera.
  • the device 100 may also include various buttons such as a side button that accepts user input.
  • the touch panel assembly 10 may include a reinforcing cover glass 50 disposed on the support glass 54.
  • a colored epoxy material layer 52 may be used to attach the cover glass 50 to the support glass 54.
  • the ITO pattern 56 may be printed on the bottom or back of the support glass 54.
  • the support glass may be arranged such that a hole 58 for receiving the fingerprint sensor module or device 20 is formed.
  • a light sensing element such as a photodiode and a light source such as a light emitting diode (LED) and laser diode (LD) are used as a fingerprint sensor. It can be integrated into the device in different ways.
  • the biometric sensor for recognizing a fingerprint may be designed to be applied to the front of the display or to a specific location of the device.
  • FIG. 2 is a diagram for explaining the configuration of a device for performing anti-spoofing according to the present invention according to an embodiment.
  • a device 100 that performs anti-spoofing through a fingerprint sensor may be provided.
  • a biometric sensor 110 that is included on one surface of the device 100 and simultaneously senses a plurality of biometric information of a user may be provided.
  • a security information generation unit 120 that generates user security information by combining a fingerprint image obtained from a biometric sensor and an oxygen saturation degree may be provided.
  • a memory 130 for storing information on biometric information of a user registered in advance by an initiation may be provided.
  • a forgery determination unit 140 may be provided that compares user security information and biometric information of a user registered in advance to determine whether the user is authentic or not.
  • the biometric sensor 110 may be characterized in that a fingerprint sensor 111 for sensing a user's fingerprint image and a photo-plethysmography (PPG) sensor 112 for measuring a user's blood oxygen saturation are combined.
  • PPG photo-plethysmography
  • the present invention is a differential CV amplifier that amplifies a PPG signal through a PPG sensor, a sample amplifier that separates the PPG signal into an IR signal and a RED signal, and removes the ambient noise signal, and an amplified IR signal and RED signal. It may include a measuring unit for analyzing the user's oxygen saturation.
  • the light-emitting unit may include at least one of an internal light source positioned in the display panel of the device 100 to emit light or an external light source positioned in the display cover glass of the device 100 to emit light.
  • the biometric sensor is composed of a touch sensor grouped by a plurality of fingerprint sensor 111 pixels, and the forgery determination unit 140 includes data obtained from each of the plurality of fingerprint sensor 111 pixels for determining the authenticity of the user. It may be characterized by using the user security information generated by.
  • the forgery determination unit 140 compares the user's fingerprint image with the previously registered fingerprint image to derive a first forgery determination value whether the matching rate of the fingerprint pattern is higher than a predetermined reference, and stores the blood oxygen saturation degree of the user in advance. It is characterized by comparing the blood oxygen saturation to derive a second counterfeit judgment value whether the error value corresponds to a predetermined reference value, and determining whether the user is authentic or not using the first counterfeit judgment value and the second counterfeit judgment value. have.
  • the authenticity of the user may be identified, and then, it is possible to determine whether or not the second is forged using the oxygen saturation level of other user information.
  • the fingerprint and oxygen saturation information can be combined and determined at once. Security can be strengthened by using complex information.
  • a fingerprint quality evaluation unit that divides a user's fingerprint image into blocks to determine a quality evaluation value
  • a filtering unit that filters the user's fingerprint image to obtain a filtered fingerprint image
  • a filtered fingerprint may further include a fingerprint comparator configured to compare the image and a pre-registered fingerprint image to determine a similarity value, and a fingerprint authenticity determination unit configured to determine whether to forge a user's fingerprint based on the determined image quality evaluation value and the similarity value.
  • the above configurations can be implemented integrally by the control unit.
  • the controller may mean a module for controlling the device 100 of the present invention.
  • a finger recognition sensor that senses a user's finger and an actual user determination circuit that determines whether the acquired fingerprint image is a fingerprint of the user's real finger is further included. I can.
  • the finger recognition sensor it is possible to determine whether a person who touches the fingerprint is a real person or another item for which the fingerprint is forged, thereby enhancing security.
  • FIG. 3 is a view for explaining the structure of the biosensor of the present invention according to an embodiment.
  • the biometric sensor 110 is characterized in that a portion for recognizing a fingerprint and a portion for measuring the blood oxygen saturation of a user may be combined and present.
  • the fingerprint sensor 111 emits light of a specific frequency reflected on the user's fingerprint by a light emitting unit that irradiates light of a specific frequency to the user's fingerprint area and photodiodes formed by a plurality of sensor pixels. It may include a light receiving unit that senses and outputs an electrical signal having a fingerprint image, and a fingerprint image generation unit that generates a fingerprint image through signal processing on the electrical signal.
  • the PPG sensor 112 is a color filter that selectively passes light of the same color in order to selectively sense light having the same color and wavelength band for some of the photodiodes included in the light receiving unit of the fingerprint sensor 111
  • an infrared filter that selectively passes light having the same wavelength band in the infrared region is mounted.
  • the fingerprint sensor 111 uses an optical filter (Red-IR Cut Filter) that blocks light above the infrared band on the remaining photodiodes except for photodiodes equipped with color filters and infrared filters among photodiodes of the light receiving unit. It may be characterized by including.
  • optical filter Red-IR Cut Filter
  • the structure of the biometric sensor 110 can be confirmed.
  • a Red-IR cut filter 2020 can be formed on a plurality of photodiodes 2010 constituting the fingerprint sensor, and an IR Pass Filter is used to measure blood oxygen saturation inside the Red-IR cut filter 2020. (2030) and Red Pass Filter (2040) may be included.
  • the oxygen saturation level in the blood is determined, and the user's fingerprint information is obtained by using the light that has passed through another Red-IR cut filter (2020). Can be identified.
  • the present invention double security by using not only the fingerprint but also the user's oxygen saturation, the security of the device can be enhanced.
  • the filter having two optical characteristics in one filter it is possible to complexly sense user biometric information, which is economical and efficient.
  • FIG. 4 is a diagram illustrating a configuration of a device including a pinhole layer according to an exemplary embodiment.
  • the device 100 may include a display panel 3110 and a fingerprint sensor 2120, and the fingerprint sensor 2120 may include a pinhole layer 3200 and a biometric sensor 110. According to exemplary embodiments, the fingerprint sensor 2120 may be packaged and attached to one surface of the display panel 3110.
  • the pinhole layer 3200 may include a plurality of pinholes, and each pinhole may form a focus of light reflected and transmitted by a fingerprint.
  • the display panel 3110 may include LEDs that emit light of a plurality of colors.
  • LEDs that emit light of at least some of the plurality of colors may be used for a fingerprint sensing operation.
  • the biometric sensor 110 includes a plurality of sensor pixels corresponding to a plurality of pin holes, and each sensor pixel may include one or more photodiodes PD.
  • a filter may be formed corresponding to each of a plurality of sensor pixels, and the same color filter (or a filter passing light of the same wavelength) may be formed corresponding to the sensor pixels. have.
  • FIG. 4 an example in which the red color filter CF_R is formed on the photodiode in the image sensor corresponding to the sensor pixel is illustrated.
  • a filter having an optical property may be applied to the remaining photodiodes to block light of an abnormal wavelength in the near-infrared band.
  • the same color (or, through a mono filter filtering the same color in the biometric sensor 110) Wavelength) may be selectively provided to the photodiodes PD in the sensor pixel, so that the clarity of the fingerprint sensing result may be improved similarly to the above-described embodiment.
  • a user's oxygen saturation may be measured using light in the infrared region passing through the near-infrared filter and light passing through the red filter.
  • the present invention is a differential CV amplifier that amplifies a PPG signal through a PPG sensor, a sample amplifier that separates the PPG signal into an IR signal and a RED signal, and removes the ambient noise signal, and an amplified IR signal and RED signal. It may include a measuring unit for analyzing the user's oxygen saturation.
  • the pinhole layer may be positioned between the display panel and the biometric sensor.
  • the pinhole layer may include a plurality of pinholes that form a focus in order to transmit light reflected by a user's fingerprint to the biometric sensor.
  • the plurality of pinholes may be arranged to correspond one-to-one with the plurality of biometric sensor pixels included in the biometric sensor.
  • FIG. 5 is a diagram comparing characteristics of a red signal and a near-infrared signal.
  • components of a red signal passing through the skin and a component of a near-infrared signal are shown.
  • Both the red and near-infrared signals that have passed through the skin are composed of DC and AC components.
  • the DC component of the near-infrared signal is larger than the DC component of the red signal
  • the AC component of the near-infrared signal is larger than the AC component of the red signal.
  • Oxygen saturation uses the difference in the response of oxygen hemoglobin and hemoglobin to the red signal and near-infrared signal, and uses the ratio of the signal calculated as follows.
  • R is the ratio of the red signal to the near-infrared signal
  • S R is the red signal
  • S IR is the near-infrared signal
  • AC R is the AC component of the red signal
  • DC R is the DC component of the red signal
  • AC IR is the AC of the near-infrared signal.
  • Component, DC IR is the DC component of the near-infrared signal
  • FIG. 6 is a diagram showing a change in oxygen saturation according to a ratio of a signal.
  • FIG. 6 a change in oxygen saturation according to a ratio of a red signal and a near-infrared signal is shown. That is, it can be seen that oxygen saturation decreases as the size of the red signal increases compared to the near-infrared signal, and oxygen saturation increases as the size of the red signal decreases compared to the near-infrared signal.
  • oxygen saturation is a criterion for determining heart function and lung function, and the oxygen saturation level approaches 100 in a normal person.
  • the relationship between the ratio of the red signal and the near-infrared signal and the oxygen saturation is as follows.
  • FIG. 7 is a graph showing a change in light absorption coefficient according to wavelength.
  • oxygen saturation and fingerprints of a user may be simultaneously recognized using the biometric sensor of the present invention.
  • Oxygen saturation can be measured through a PPG sensor equipped with a red color filter and an infrared pass filter on the photodiode of the fingerprint sensor. It will be described in more detail below.
  • a photodiode equipped with a red color filter is referred to as a first light-emitting element, and a photodiode equipped with an in-pass filter in infrared is referred to as a second light-emitting element.
  • the first light emitting device may perform light output of a red signal.
  • photodetection of a red signal may be performed through the red light receiving element.
  • the first photodetection data detected by the light receiving device may be stored in a memory.
  • the current I 2 applied to the second light emitting device may be increased by a unit size.
  • the second light-emitting device may perform light output of a near-infrared signal. Photodetection of a near-infrared signal may be performed using a light receiving element.
  • the second photodetection data detected by the light receiving element may be stored in a memory.
  • the unit size may be in units of ⁇ A.
  • the current (I 1 ) applied to the first light-emitting device and the current (I 2 ) applied to the second light-emitting device reach a set value, respectively, and if the first current (I 1 ) and the second current (I 2) are If) does not reach the set value, the first current I 1 is increased by a unit size and the second current I 2 is increased by a unit size, and thus may be repeated. That is, the first current I 1 and the second current I 2 may be continuously increased until effective data necessary to analyze the characteristics of the oxygen saturation sensor is obtained.
  • the first photo-detection data and the second photo-detection data may be analyzed.
  • the rate of change of the first photodetection data value according to the increase of the first current I 1 is analyzed (first analysis), and the rate of change of the second photodetection data value according to the increase of the second current I 2 is determined. Analyze (second analysis). In addition, the difference between the rate of change of the first photodetection data value according to the increase of the first current I 1 and the rate of change of the second photodetection data value according to the increase of the second current I 2 is analyzed (3rd analysis ). In addition, the value of the first photodetection data for the first current I 1 having a specific size is analyzed (4th analysis), and the second photodetection data for the second current I 2 having the same size is analyzed.
  • the method of calculating the previously stored oxygen saturation can be modified. That is, the oxygen saturation measurement algorithm (Equations 1 and 2) is modified to be suitable for an oxygen saturation measurement sensor having a new light output characteristic.
  • the correction of the oxygen saturation measurement algorithm may be made comprehensively based on the first to sixth analysis results.
  • the oxygen saturation measurement algorithm may be modified based on the first analysis and the fourth analysis.
  • the microprocessor stores the modified oxygen saturation calculation method in a memory, and performs the calculation of the oxygen saturation degree with reference to the modified oxygen saturation degree calculation method.
  • FIG. 8 is a diagram for describing a method of detecting a forged fingerprint according to an exemplary embodiment.
  • the forgery determination unit 140 includes a fingerprint sensor 111 that senses a user's fingerprint.
  • the forgery determination unit 140 may obtain an input fingerprint image 115 in which a user's fingerprint is displayed through the fingerprint sensor 111.
  • the user's fingerprint image 115 may be obtained in the form of a partial image capturing a part of the user's fingerprint.
  • the forgery determination unit 140 can recognize the user's fingerprint by comparing the fingerprint (hereinafter referred to as'input fingerprint') displayed on the user's fingerprint image 115 with the registered fingerprints displayed on the registered fingerprint images 121 to 123. I can.
  • the registered fingerprint images 121, 122, and 123 may be stored in advance in the registered fingerprint database 120 through a fingerprint registration process.
  • the registered fingerprint database 120 may be stored in a memory (not shown) included in the forgery determination unit 140 or may be stored in an external device (not shown) such as a server capable of communicating with the forgery determination unit 140. .
  • the forgery determination unit 140 may match the input fingerprint image 115 and the registered fingerprint image 123 to compare the input fingerprint image 115 and the registered fingerprint image 123. have. For example, the forgery determination unit 140 adjusts the size of the input fingerprint image 115 or adjusts the size of the input fingerprint image 115 so that a common area overlaps between the input fingerprint image 115 and the registered fingerprint image 123. ) Can be rotated and translated. The forgery determination unit 140 may calculate a similarity of the fingerprint pattern in the corresponding common area and determine a recognition result based on the calculated similarity.
  • the forgery determination unit 140 may include a forged fingerprint detection device (not shown), and may determine whether the input fingerprint is a forged fingerprint through the forged fingerprint detection device.
  • FIG. 9 is a diagram for describing characteristics of pixels of a fingerprint sensor according to an exemplary embodiment.
  • a fingerprint sensor performing fingerprint sensing may include a characteristic of a capacitance included in the touch sensor.
  • Pixels that detect a fingerprint by one disclosure may be configured with a narrower pitch than pixels of a general touch sensor. For example, there may be a plurality of pixels constituting the touch sensor.
  • the fingerprint sensing pixels may be configured in plural, and several fingerprint sensing pixels may be grouped together. A sensor grouped by a plurality of pixels may be used as a touch sensor.
  • the plurality of fingerprint detection pixels is effective because detailed data of individual pixels can be used to detect a fake fingerprint.
  • Each of the fingerprint sensing pixels may sense light to sense an electronic signal in which a fingerprint is secured.
  • the fingerprint sensing pixels may have a pitch of 200 ⁇ m or less.
  • the pitch of the pixels of the touch sensor grouped by the plurality of fingerprint sensing pixels may be 2.0 mm or more.
  • a pitch of a fingerprint pixel In order to secure additional resolution of a fingerprint image, it is necessary to reduce a pitch of a fingerprint pixel. When the number of pixels of the fingerprint sensor decreases, a clear fingerprint image can be obtained. In addition, it is necessary to reduce the angle of view and reduce the pitch between pinholes by reducing the diameter of the pinhole of the pinhole layer.
  • the present invention can provide an anti-spoofing method using a device including a fingerprint sensor, and the present method simultaneously senses a plurality of biometric information of a user using a biometric sensor included on one side of the device. Steps, comprising the step of creating user security information by combining the fingerprint image and oxygen saturation obtained from the biometric sensor, and determining whether the user is authentic or not by comparing the user security information with the biometric information of the user registered in advance,
  • the sensor may be characterized in that a fingerprint sensor that senses a user's fingerprint image and a photo-plethysmography (PPG) sensor that measures a user's blood oxygen saturation are combined.
  • PPG photo-plethysmography
  • a mobile terminal it is possible to enhance the security of a mobile terminal by detecting whether a fake fingerprint has been detected using a fingerprint and oxygen saturation, which are biometric identification information.
  • the mobile device may have a function of measuring oxygen saturation and user authentication at the same time, so that the mobile device can be used to measure the oxygen saturation and recognize a fingerprint of a finger to perform identity authentication. Therefore, it is possible to perform user authentication more efficiently and stably while simultaneously and conveniently measuring the oxygen saturation level without requiring a separate oxygen saturation meter.
  • a spoofing attack through fingerprint recognition can be prevented by increasing the accuracy of checking the correspondence between a user's registered fingerprint and the recognized fingerprint.
  • the present invention doubles security using not only fingerprints but also the user's oxygen saturation, so the security of the device can be enhanced.
  • a filter having two optical characteristics in one filter it is possible to complexly sense user biometric information, which is economical and efficient.

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Abstract

Selon un mode de réalisation, la présente invention concerne un procédé anti-mystification faisant appel à un dispositif comprenant un capteur d'empreintes digitales. Plus particulièrement, l'invention porte sur un procédé et un dispositif anti-mystification pouvant améliorer la sécurité d'un dispositif en agençant des éléments optiques d'une région d'une couche de filtre découpée d'un capteur optique d'empreintes digitales de façon à mesurer la saturation en oxygène, de telle sorte que la saturation en oxygène peut être mesurée pendant la reconnaissance de l'empreinte digitale d'un utilisateur.
PCT/KR2019/003049 2019-03-08 2019-03-15 Procédé et système anti-mystification d'un dispositif comprenant un capteur d'empreintes digitales Ceased WO2020184763A1 (fr)

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CN201980095500.9A CN113785291A (zh) 2019-03-08 2019-03-15 包括指纹传感器的设备的反欺骗方法和系统

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CN112603302A (zh) * 2020-12-25 2021-04-06 北京思比科微电子技术股份有限公司 使用屏下光学指纹识别芯片检测血氧浓度的方法
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