CN109844746B

CN109844746B - Verification method and verification equipment

Info

Publication number: CN109844746B
Application number: CN201780064634.5A
Authority: CN
Inventors: 黄邦宇; 黄曦; 朱萸; 耿协全
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-13
Filing date: 2017-09-30
Publication date: 2021-05-04
Anticipated expiration: 2037-09-30
Also published as: WO2018166186A1; CN109844746A

Abstract

The application discloses a verification method and verification equipment, which are used for identifying pulse information of a verifier so as to verify the identity of the verifier. The method comprises the following steps: acquiring first pulse information input by a verifier; obtaining a first value representing an Alternating Current (AC) component from the first pulse information; matching the first value with a pre-stored second value, wherein the second value is a value representing an AC component in pre-stored second pulse information of the user; if the matching is unsuccessful, the verification is not passed. In the technical scheme provided by the embodiment of the application, the first value representing the AC component in the pulse information of the verifier is matched with the preset second value to determine whether the verification is passed, and due to the use of the characteristics of the AC component, the counterfeiting difficulty is increased, and the verification safety is improved.

Description

Verification method and verification equipment

The present application claims priority of chinese patent application entitled "a method and apparatus for identifying true and false fingerprints" filed by chinese patent office on 13/3/2017 with application number 201710147478.0, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of intelligent identification, and in particular, to a verification method and a verification device.

Background

Fingerprint identification technology is used to pre-store a person's fingerprint by an authentication device and to associate the person's fingerprint with his identity. When a fingerprint requiring authentication is detected, the authentication device verifies the identity by looking for a stored fingerprint that matches the authenticated fingerprint. Fingerprint identification technology is becoming more and more widespread in the security applications of our daily lives.

However, special imitation fingerprint film technology is currently on the market, and a fingerprint imitation person can acquire the fingerprint of a user and copy the fingerprint of the user on a silica gel-like material to obtain an imitation fingerprint. Because the imitation fingerprint is the same as the fingerprint of the user, the imitation fingerprint can pass the verification under the verification equipment which only identifies by the fingerprint, so that the safety of the verification equipment cannot be ensured.

Disclosure of Invention

The embodiment of the application provides a verification method and verification equipment, which are used for identifying pulse information of a verifier so as to verify the identity of the verifier.

A first aspect of an embodiment of the present application provides a verification method, including:

the method comprises the steps of obtaining first pulse information input by a verifier, wherein the first pulse information of the verifier is used for the identity of the verifier, and if the identity of the verifier is a certain user and the identity of the user is qualified to pass verification, the verification can be passed. It should be noted that, the user may enter pulse information in advance, or may also enter fingerprint information, secret information, or other personal or identity information in advance, and store the information, when the verifier enters verification information, if the information of the verifier matches with the user, the verifier may be consistent with the identity of the user, and the verification of the verifier passes.

After the first pulse information is obtained, a first value representing an Alternating Current (AC) component is obtained from the first pulse information, the first pulse information includes a Direct Current (DC) component and an AC component, and in the embodiment of the application, the identity of the verifier is verified through the characteristic of the AC component, wherein the AC component is not a numerical value, and therefore a first value representing the AC component is required to represent.

The first value may then be matched to a pre-stored second value that is a value of the pre-stored second pulse information of the user that characterizes the AC component. In this embodiment of the application, the second value is pre-stored when the second pulse information of the user is the pulse information entered by the user.

And finally, if the matching is unsuccessful, the verification is not passed. In some possible embodiments, the matching of the AC component may be only one of the necessary verification methods, and if the matching is not successful, the verification may not be passed, and if the matching is successful, the matching of other verification conditions may be continued.

In some possible embodiments, matching of AC components may also be a sufficient way of verifying that the verification is passed if only the AC components match successfully.

And matching the first value representing the AC component in the pulse information of the verifier with the preset second value to determine whether the verification is passed, wherein the characteristics of the AC component are used, so that the counterfeiting difficulty is increased, and the verification safety is increased.

In some possible embodiments, the method may be:

the obtaining of the first pulse information input by the verifier may be obtaining values of PPG signals of the verifier at different time points N times, respectively, and obtaining values of N PPG signals as the first pulse information, where N is a positive integer greater than 2. Then obtaining a first value characterizing the alternating current AC component from the first pulse information may be calculating a first variance of the values of the N PPG signals, with the first variance as the first value.

The matching the first value with the pre-stored second value may be comparing a difference between the first variance and a second variance, the second variance being a variance of values of the pre-stored M PPG signals of the user, the M being a positive integer greater than 2, and if the difference is not within a pre-set range, the matching of the first value with the second value is unsuccessful, the verification fails. And if the difference value is within a preset range and the first value and the second value are successfully matched, the verification is passed.

Since PPG is a typical non-invasive measurement technique and method, the pulsatile change of the blood volume of peripheral microvasculature along with the heart pulse is obtained by real-time tracing the light absorption of the measured part (finger tip, ear lobe, nose tip, etc.), so the first pulse signal of the verifier can be effectively obtained by obtaining the PPG signal thereof.

With reference to the first aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the method may further obtain a third value representing the DC component from the first pulse information, and then match the third value with a pre-stored fourth value, where the fourth value is a value representing the DC component in the pre-stored second pulse information of the user, and if the matching is unsuccessful, the verification is not passed.

Specifically, the values of the PPG signals of the verifier may be obtained P times at different time points, respectively, to obtain P values of the PPG signals, where P is a positive integer greater than 2, then a first mean value of the P values of the PPG signals is calculated, and then a difference between the first mean value and a second mean value is compared, where the second mean value is a pre-stored mean value of M values of the PPG signals of the user, where M is a positive integer greater than 2, and if the difference is not within a preset range, the first mean value and the second mean value are unsuccessfully matched, the verification fails. Because the verification is carried out by respectively comparing the DC component and/or the AC component in the pulse information of the verifier and the user, the counterfeiting difficulty is increased, and the safety of the verification is enhanced.

With reference to the first aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the method may include acquiring first fingerprint information input by the verifier, and then matching the first fingerprint information with pre-stored second fingerprint information, where the second fingerprint information is pre-stored fingerprint information of a user, and if the matching is unsuccessful, the verification fails. Since the verification is performed by comparing the DC component and/or the AC component and/or the fingerprint information in the first pulse information of the verifier and the user, respectively, the difficulty of counterfeiting is increased, and the security of the verification is enhanced.

Specifically, L light sources in the photosensor may be used to emit detection light, where L is a positive integer greater than or equal to 2, and T photosensors in the photosensor may be used to receive optical signals after reflection or transmission of the detection light, where T is a positive integer less than or equal to L, to obtain the first pulse information. In some possible embodiments, L is equal to 2, wherein the first photo sensor is configured to receive the reflected or transmitted light signal after being illuminated by the first light source, and the second photo sensor is configured to receive the reflected or transmitted light signal after being illuminated by the second light source. Because the light sources with L different spectrums are used for obtaining, the PPG signal obtained by each light source needs to be considered, so that the counterfeiting difficulty is further increased, and the verification safety is enhanced.

A second aspect of the embodiments of the present application provides a verification apparatus, which includes an obtaining module, a processing module, a matching module, and a determining module. The obtaining module obtains first pulse information input by the verifier, the processing module obtains a first value representing an Alternating Current (AC) component from the first pulse information, the matching module matches the first value with a pre-stored second value, the second value is a value representing the AC component in the pre-stored second pulse information of the user, and if the matching is unsuccessful, the module is determined not to pass the verification.

With reference to the second aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the obtaining module is specifically configured to obtain values of the PPG signals of the verifier N times at different time points, so as to obtain N values of the PPG signals, where N is a positive integer greater than 2; the processing module is specifically configured to calculate a first variance of the values of the N PPG signals, and use the first variance as the first value.

The matching module is specifically configured to compare a difference between the first variance and a second variance, where the second variance is a variance of values of M pre-stored PPG signals of the user and is used as the second value, and M is a positive integer greater than 2; if the difference is not in the preset range, the first value and the second value are not matched successfully, and the verification is not passed. The determining module is further configured to pass the verification if the matching is successful. In addition, if the difference value is within a preset range, the first value and the second value are successfully matched.

With reference to the second aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the processing module obtains a third value representing a DC component from the first pulse information, the matching module matches the third value with a pre-stored fourth value, where the fourth value is a value representing the DC component in the pre-stored second pulse information of the user, and if the matching is unsuccessful, the determining module fails the verification. Because the verification is carried out by respectively comparing the DC component and/or the AC component in the pulse information of the verifier and the user, the counterfeiting difficulty is increased, and the safety of the verification is enhanced.

With reference to the second aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the obtaining module is further configured to obtain first fingerprint information input by the verifier; the matching module is also used for matching the first fingerprint information with pre-stored second fingerprint information, wherein the second fingerprint information is pre-stored fingerprint information of a user; the determining module is further configured to fail the verification if the matching is unsuccessful. Since the verification is performed by comparing the DC component and/or the AC component and/or the fingerprint information in the pulse information of the verifier and the user respectively, the difficulty of counterfeiting is increased, and the security of the verification is enhanced.

With reference to the second aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the obtaining module may further obtain, at different time points, P times of values of the PPG signals of the verifier, so as to obtain P values of the PPG signals, where P is a positive integer greater than 2; the processing module is specifically further configured to calculate a first mean value of the values of the P PPG signals. So that the matching module compares a difference between the first mean value and a second mean value, where the second mean value is a mean value of pre-stored values of M PPG signals of the user, and M is a positive integer greater than 2. If the difference is not within the preset range, the first average value and the second average value are not matched successfully, and the verification is not passed.

With reference to the second aspect of the embodiment of the present application, in an implementation manner of the embodiment of the present application, the photosensor is configured to acquire pulse information of the verifier to obtain the first pulse information, where the first pulse information includes L pieces of pulse information, and L is a positive integer greater than or equal to 2.

The photoelectric sensor comprises L light sources and T light sensors, the L light sources are used for emitting detection light, the T light sensors are used for receiving optical signals after reflection or transmission of the detection light to obtain the first pulse information, and the T is a positive integer less than or equal to L.

Since acquisition is performed by L light sources of different spectra, the PPG signal acquired by each light source needs to be considered, and therefore

A third aspect of embodiments of the present application provides an authentication device comprising a touchscreen, one or more processors, memory, one or more applications, wherein the touchscreen comprises a touch-sensitive surface and a display, wherein the one or more programs are stored in the memory, the one or more programs comprising instructions that, when executed by the electronic device, cause the electronic device to perform the steps of:

the method comprises the steps of obtaining first pulse information input by a verifier, obtaining a first value representing an Alternating Current (AC) component from the first pulse information, matching the first value with a pre-stored second value, wherein the second value is the value representing the AC component in the pre-stored second pulse information of a user, and if the matching is unsuccessful, the verification is failed.

With reference to the third aspect of the embodiments of the present application, in an implementation manner of the embodiments of the present application, in the step of acquiring the first pulse information input by the verifier, the at least one processor executes the instructions to cause the terminal to perform at least the following steps:

obtaining the values of the PPG signals of the verifier at different time points N times respectively to obtain N values of the PPG signals, where N is a positive integer greater than 2, calculating a first variance of the N values of the PPG signals, taking the first variance as the first value, comparing a difference between the first variance and a second variance, where the second variance is a variance of pre-stored values of M PPG signals of the user as the second value, and M is a positive integer greater than 2, and if the difference is not within a preset range, and the first value and the second value are unsuccessfully matched, the verification fails. And if the difference value is within a preset range, the first value and the second value are successfully matched.

With reference to the third aspect of the embodiments of the present application, in an implementation manner of the embodiments of the present application, the at least one processor executing the plurality of instructions causes the input device to further perform the following steps:

and acquiring a third value representing the DC component from the first pulse information, matching the third value with a prestored fourth value, wherein the fourth value is the value representing the DC component in the prestored second pulse information of the user, and if the matching is unsuccessful, the verification is failed. Because the verification is carried out by respectively comparing the DC component and/or the AC component in the pulse information of the verifier and the user, the counterfeiting difficulty is increased, and the safety of the verification is enhanced.

respectively acquiring the values of the PPG signals of the verifier P times at different time points to obtain P values of the PPG signals, where P is a positive integer greater than 2, calculating a first mean value of the P values of the PPG signals, taking the first mean value as the third value, comparing a difference between the first mean value and a second mean value, where the second mean value is a pre-stored mean value of M values of the PPG signals of the user as the fourth value, and M is a positive integer greater than 2; if the difference is not in the preset range, the third value and the fourth value are unsuccessfully matched, and the verification is not passed.

In combination with the third aspect of the embodiments of the present application, in an implementation manner of the embodiments of the present application, in the step of obtaining the pulse information of the verifier using the photosensor, the at least one processor executes the instructions to cause the terminal to perform at least the following steps:

the L light sources in the photoelectric sensor are used for emitting detection light, L is a positive integer larger than or equal to 2, T optical sensors in the photoelectric sensor are used for receiving optical signals after reflection or transmission of the detection light, and the first pulse information is obtained, wherein T is a positive integer smaller than or equal to L. Specifically, L may be equal to 2, where the first optical sensor is configured to receive the optical signal reflected or transmitted after being irradiated by the first light source, and the second optical sensor is configured to receive the optical signal reflected or transmitted after being irradiated by the second light source.

Because the light sources with L different spectrums are used for obtaining, the PPG signal obtained by each light source needs to be considered, so that the counterfeiting difficulty is further increased, and the verification safety is enhanced.

and acquiring first fingerprint information input by the verifier, matching the first fingerprint information with pre-stored second fingerprint information, wherein the second fingerprint information is the pre-stored fingerprint information of the user, and if the matching is unsuccessful, the verification is failed.

Since the verification is performed by comparing the DC component and/or the AC component and/or the fingerprint information in the pulse information of the verifier and the user respectively, the difficulty of counterfeiting is increased, and the security of the verification is enhanced.

A fourth aspect of embodiments of the present application provides a computer program product, which, when run on an authentication apparatus, causes the authentication apparatus to perform the method of the above-described aspects.

A fifth aspect of embodiments of the present application provides a computer-readable storage medium comprising instructions that, when executed on an authentication device, cause the authentication device to perform the method of the above-described aspects.

In the technical scheme provided by the embodiment of the application, the first value representing the AC component in the pulse information of the verifier is matched with the preset second value to determine whether the verification is passed, and due to the use of the characteristics of the AC component, the counterfeiting difficulty is increased, and the verification safety is improved.

Drawings

FIG. 1-1 is a schematic view of a fingerprint;

fig. 1-2 are schematic diagrams of a verifier attempting fingerprint verification by a cell phone using a fingerprint;

FIGS. 1-3 are schematic views of a handset configuration;

FIGS. 1-4 are schematic diagrams of a door access machine verifying a fingerprint;

FIGS. 1-5 are schematic diagrams of simulated fingerprints of silica gel materials;

FIGS. 1-6 are schematic diagrams of a verifier verifying a fingerprint on a cell phone and a gate inhibition machine using a dummy fingerprint;

FIG. 2-1 is a schematic illustration of a verification method;

FIG. 2-2 is another schematic illustration of a verification method;

FIGS. 2-3 are schematic diagrams of an authentication device;

FIG. 3-1 is a schematic diagram of obtaining a pulse signal of a user under the PPG technique;

fig. 3-2 is a schematic diagram of a PPG waveform;

3-3 are schematic diagrams of PPG waveforms using a wavy line to simplify an alternative electrocardiogram;

fig. 3-4 are schematic diagrams of the fingerprint identification terminal acquiring a pulse signal;

3-5 are graphs of PPG waveforms with light absorbance on the ordinate;

3-6 are schematic diagrams of the internal structure of the fingerprint touch pad;

3-7 are schematic diagrams illustrating the operation of various components of the fingerprint touch pad;

3-8 are schematic diagrams of the fingerprint touch pad acquiring second pulse information of the user;

figure 4-1 is a schematic diagram of a PPG waveform of a pulse signal passing through a user;

fig. 4-2 is a schematic diagram of a verifier performing fingerprint verification on a fingerprint identification terminal;

fig. 4-3 are schematic diagrams of a verifier performing fingerprint verification using a prosthetic finger on a fingerprint identification terminal;

fig. 4-4 are schematic diagrams of a verifier performing fingerprint verification on a fingerprint identification terminal;

fig. 4-5 are another schematic diagrams of the verifier performing fingerprint verification on the fingerprint identification terminal;

FIG. 5-1 is a schematic view of a process of inputting a fingerprint by a fingerprint identification terminal;

FIG. 5-2 is a schematic diagram illustrating a process of fingerprint authentication by the fingerprint identification terminal;

FIG. 5-3 is a schematic flow chart of feature extraction;

5-4 are schematic diagrams of two different PPG waveforms illuminated with two different spectra of light sources;

5-5 are schematic diagrams of a process of sequentially turning on and off 2 light sources of different spectra to collect a PPG signal;

FIGS. 5-6 are schematic layouts of led1, led2, and PD;

FIGS. 5-7 are schematic diagrams of alternative layouts of led1, led2, and PD;

FIGS. 5-8 are schematic layouts of led1, led2 and PD1, PD 2;

FIG. 6-1 is a schematic flow chart of the operation of the door access device;

FIG. 6-2 is a schematic view of a user placing a finger in a fingerprint identification area of a door access machine;

FIG. 6-3 is a diagram of a fingerprint identification terminal illuminated led 1;

fig. 6-4 are schematic diagrams of the illuminated led2 of the fingerprint identification terminal.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The fingerprints of each person are different in patterns, break points and intersection points (as shown in fig. 1-1, which is a schematic diagram of fingerprints), so that the fingerprints of each person are unique and invariable throughout the life, and by means of the uniqueness and stability, the fingerprint identification technology is more and more widely applied to the safety application of daily life. Currently, a fingerprint identification terminal may receive fingerprints of one or more users by using a fingerprint identification technology, receive identity information input by the users, and correspond the identity information of the users with the fingerprints. When the verification device detects the verification fingerprint of the verifier, the verification fingerprint is compared with the stored fingerprint of the user, if the matched stored fingerprint of the user is searched, the identity of the verifier is the user, and then the next operation can be performed through fingerprint verification, such as access control, opening of a mobile phone screen or further verification, and the like, without limitation.

In this embodiment of the application, the fingerprint identification terminal may include any terminal device such as a mobile phone, a door access device, a payment terminal, a tablet computer, a Personal Digital Assistant (PDA), a Point of Sales (POS), and a vehicle-mounted computer. Taking a mobile phone as an example, the mobile phone may have a built-in fingerprint unlocking function, specifically, a fingerprint touch pad may be built in the mobile phone, when a user tries to operate the mobile phone, the user may input a fingerprint on the fingerprint touch pad in the mobile phone, and then the mobile phone may verify the fingerprint, and if the fingerprint passes the verification, further operation may be performed, for example, a screen is opened. In some possible embodiments, it is not necessary to display "please input a fingerprint", and the user may directly touch the fingerprint touch screen when the mobile phone is in the off-screen state, so that the mobile phone obtains the fingerprint of the user and verifies the identity of the user, which is not limited herein. In some possible embodiments, the position of the fingerprint touch pad may be in the screen, or may be in a region specially set on the back of the mobile phone, which is not limited herein.

It should be noted that, the obtaining of the fingerprint of the user by the mobile phone may include two cases, one is entering the fingerprint, and the other is verifying the fingerprint. When the fingerprint is input, the mobile phone can acquire the fingerprint of the user through the fingerprint touch pad, extract the characteristics of the fingerprint and store the characteristics. The case of fingerprint verification is that after the verification fingerprint of the verifier is obtained, the features are extracted, and the stored matched input fingerprint is found according to the features, if the features can be found, the identity of the owner of the verification fingerprint and the input fingerprint are the same person, and verification can be passed. In some possible embodiments, after the mobile phone obtains the input fingerprint of the user, the mobile phone may receive the identity information input by the user, and may correspond the input fingerprint to the identity information, such as name, gender, position, job number, and the like, and may further correspond to biometric information such as iris of the user, so that when the user passes the verification using the fingerprint, the mobile phone may read information matching the identity of the user.

As shown in fig. 1-2, which is a schematic diagram of a verifier attempting to verify a fingerprint by using a fingerprint, when the verifier wants to verify the fingerprint, the verifier may click a main control key, or a switch key, or a volume adjustment key, or call out a voice assistant (such as siri function of apple) by using voice, and the mobile phone may display a graphic and/or text prompt on a screen to "please input the fingerprint", or may not prompt any text, and this is not limited, and the verifier places a finger on a fingerprint touch pad behind the verifier, and the mobile phone may obtain the fingerprint of the verifier, and may search for a matching fingerprint from the stored fingerprints of the user. If a matching fingerprint is found, the verification fingerprint passes the fingerprint verification, and further operations may be performed in the mobile phone, such as unlocking the mobile phone and displaying "fingerprint unlocking success", or further performing other verifications, such as voice verification, and the like, which is not limited herein. In contrast, if the corresponding preset fingerprint cannot be found to match the verification fingerprint, no prompt may be displayed, or a prompt "verification failed" or "please input the fingerprint again" may be displayed, which is not limited herein. In some possible embodiments, there may be more than one preset fingerprint, there may be fingerprints of multiple fingers, such as thumb, index finger, middle finger, ring finger, tail finger, and both left and right hands, and then there may be ten fingerprints of the hand.

In the embodiment of the present application, the structure of the mobile phone may include, as shown in fig. 1 to 3 (fig. 1 to 3 are schematic structural diagrams of the mobile phone): a Radio Frequency (RF) circuit A-10, a memory A-20, an input unit A-30, a display unit A-40, a sensor A-50, an audio circuit A-60, a wireless fidelity (Wi-Fi) module A-70, a processor A-80, a power supply A-90, and the like. Those skilled in the art will appreciate that the handset construction illustrated in the figures is not intended to be limiting and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.

The RF circuit a-10 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for processing downlink information of a base station after receiving the downlink information to the processor a-80; in addition, the data for designing uplink is transmitted to the base station. In general, the RF circuits A-10 include, but are not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit A-10 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

The memory a-20 may be used to store software programs and modules, and the processor a-80 executes various functional applications and data processing of the cellular phone by operating the software programs and modules stored in the memory a-20. The memory a-20 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory A-20 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit a-30 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit A-30 may include a touch panel A-31 and other VR devices A-32. The touch panel a-31, also referred to as a touch screen, may collect touch operations of a user (e.g., operations of a user on or near the touch panel a-31 using any suitable object or accessory such as a finger, a stylus, etc.) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel a-31 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor A-80, and can receive and execute commands sent by the processor A-80. In addition, the touch panel a-31 may be implemented using various types, such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel A-31, the input unit A-30 may include other VR devices A-32. In particular, the other VR devices a-32 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit a-40 may be used to display information input by or provided to the user and various menus of the cellular phone. The Display unit a-40 may include a Display panel a-41, and optionally, the Display panel a-41 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch panel A-31 may overlay the display panel A-41, and when the touch panel A-31 detects a touch operation thereon or nearby, the touch panel A-31 may transmit the touch operation to the processor A-80 to determine the type of the touch event, and then the processor A-80 may provide a corresponding visual output on the display panel A-41 according to the type of the touch event. Although in FIGS. 5-3, the touch panel A-31 and the display panel A-41 are shown as two separate components to implement the input and output functions of the handset, in some embodiments, the touch panel A-31 and the display panel A-41 may be integrated to implement the input and output functions of the handset.

The handset may also include at least one sensor A-50, such as a photosensor, light sensor, motion sensor, and other sensors. The photosensor may be, for example, a Photodiode (PD). The PD is a photoelectric sensing device that converts an optical signal into an electrical signal in an electrical circuit. The PD works under the action of reverse voltage, and when no light is emitted, the reverse current is extremely weak, namely dark current; in the presence of light, the reverse current rapidly increases to tens of microamperes, referred to as photocurrent. The greater the intensity of the light, the greater the reverse current. The change in light causes a change in photodiode current, which converts the optical signal into an electrical signal. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel A-41 according to the brightness of ambient light, and a proximity sensor that turns off the display panel A-41 and/or the backlight when the mobile phone is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

Audio circuitry a-60, speaker a-61, and microphone a-62 may provide an audio interface between the user and the handset. The audio circuit A-60 can transmit the electrical signal converted from the received audio data to the loudspeaker A-61, and the electrical signal is converted into a sound signal by the loudspeaker A-61 and is output; on the other hand, microphone A-62 converts the collected sound signals into electrical signals that are received by audio circuit A-60 and converted into audio data that is processed by audio data output processor A-80, either through RF circuit A-10 for transmission to, for example, another cell phone, or to memory A-20 for further processing.

Wi-Fi belongs to short-distance wireless transmission technology, and a mobile phone can help a user to receive and send e-mails, browse webpages, access streaming media and the like through a Wi-Fi module A-70, and provides wireless broadband internet access for the user. Although fig. 5-3 show the Wi-Fi module a-70, it is understood that it does not belong to the essential constitution of the handset and can be omitted entirely as needed within the scope not changing the essence of the invention.

The processor a-80 is a control center of the mobile phone, connects each part of the whole mobile phone by using various interfaces and lines, and executes various functions and processes data of the mobile phone by running or executing software programs and/or modules stored in the memory a-20 and calling data stored in the memory a-20, thereby performing overall monitoring of the mobile phone. Alternatively, processors A-80 may include one or more processing units; preferably, processors A-80 may integrate an application processor, which handles primarily the operating system, user interface, and applications, etc., and a modem processor, which handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor a-80.

The handset also includes a power supply a-90 (e.g., a battery) for powering the various components, which may preferably be logically connected to the processor a-80 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.

In some possible embodiments, the fingerprint identification terminal may also be a door lock, and the door lock is taken as an example for description below. The access control machine is a part of an access control system, which is also called an access management control system, and is an intelligent management system for managing the access of personnel. Common access control systems include: the system comprises a password access control system, a non-contact card access control system, a fingerprint iris palm type biological identification access control system, a face identification access control and attendance system and the like, wherein the access control system is widely applied to a management control system. Specifically, the process of collecting, identifying and verifying the fingerprint of the access control device is similar to that of the mobile phone, and is not repeated here. As shown in fig. 1 to 4 (fig. 1 to 4 are schematic views of a door lock for verifying a fingerprint), the door lock may display "please input a fingerprint", when a verifier inputs a fingerprint, the door lock may display "verify a fingerprint …", and when the fingerprint is verified, the door lock may display "verify pass". In some scenarios, the fingerprint of the toes may also be used for fingerprint verification, for example, in a yoga room or a steam sauna room in some gymnasiums, the fingerprint of the toes may be used as a passing verification fingerprint due to the inconvenience of the hand holding the fitness equipment or beverage and the like. In the embodiment of the present application, since the storage and reading of the fingerprint of the finger and the storage and reading of the toe are consistent, the fingerprint of the finger is used for discussion herein below, and the toe portion is not further described, so as to avoid redundant description.

However, special techniques for simulating fingerprints are currently available. A fingerprint imitator using the technology can copy a fingerprint on a silica gel-like material by copying a fingerprint pattern of a user to obtain a fake fingerprint with the same texture as the fingerprint of the user (for example, fig. 1-5 are schematic diagrams of fake fingerprints of silica gel materials). If the user stores the fingerprint and the identity in the fingerprint identification mobile phone or the door access device, if the user of the copied fingerprint uses the copied fingerprint to authenticate the mobile phone or the door access device, because the copied fingerprint is the same as the fingerprint of the user, if the mobile phone or the door access device only uses the texture of the fingerprint as a certificate to authenticate the fingerprint, the identity of the user of the copied fingerprint can be mistaken for the user, and the mobile phone or the door access device allows the copied fingerprint to pass authentication (as shown in fig. 1-6, a schematic diagram that the verifier uses the copied fingerprint to authenticate the mobile phone and the door access device), so that the security of authentication which originally intends to use the characteristic of uniqueness of the human fingerprint cannot be guaranteed.

In the embodiment of the application, in order to improve the security of the fingerprint verification technology, a fingerprint verification method is provided, and the fingerprint of a user and the pulse signal of the user are simultaneously identified. Specifically, when the user enters the fingerprint, the pulse signal of the user may be acquired in addition to the fingerprint of the user, so that when the verification fingerprint is detected, the pulse signal of the verifier may be identified in addition to the fingerprint of the verifier. Under the identification technology, when the verifier carries the imitation fingerprint to verify in a mobile phone or an access control machine, except that the texture of the fingerprint needs to be the same as the user of the imitation fingerprint, the pulse signal of the fingerprint needs to be the same as the user of the imitation fingerprint, otherwise, the verification cannot be passed, the difficulty of passing the verification of the imitation person is greatly improved, and the safety of the fingerprint identification is greatly improved.

In order to acquire and verify the pulse signal of the user, a photoplethysmography (PPG) technique may be used. PPG is a typical non-invasive measurement technique and method, which obtains pulse signals by recording the light absorption of a measured part (finger tip, earlobe, nose tip, etc.) in real time to obtain the pulsatile change of the blood volume of peripheral microvasculature along with the heart pulse. The fingerprint identification terminal uses a PPG technology to correspond the pulse signal of the user, the fingerprint of the user and the identity information of the user, when the verification fingerprint of a verifier is detected, the verification fingerprint is verified, the verification pulse signal of the verifier needs to be acquired, the feature of the verification pulse signal is extracted, the matched stored pulse signal is searched, if the matched pulse signal is found, and the identity of the matched pulse signal and the identity of the user who verifies the fingerprint are the same, the fingerprint verification can be determined.

In some possible embodiments, a mobile phone or a gate inhibition machine may verify only the pulse signal of the verifier, or may verify both the fingerprint and the pulse signal, which is not limited herein. When the fingerprint and the pulse signal need to be verified at the same time, the fingerprint can be verified first, if the fingerprint passes, the pulse signal is compared, and if the fingerprint passes or passes, the identity verification is passed; if the fingerprint does not pass, the pulse signals do not need to be continuously compared.

In some possible embodiments, the fingerprint and the pulse signal may be compared separately, and the authentication may be passed only if both are authenticated at the same time and both are directed to the identity of the same user. The pulse signals can be verified firstly, and if the fingerprint is verified again, the sequence is not limited.

It should be noted that the "matching" of fingerprints or "matching" of pulse signals does not mean that the fingerprints or pulse signals of both are the same, and it should be understood that even if the same person inputs the fingerprints of the same finger twice, the fingerprints and pulse signals are not always the same. The matching of the two (fingerprint or pulse signal) refers to extracting features when information is input, acquiring the features of the information when verification is performed, and determining whether the identity of the features meeting the verified information exists in the stored information, if so, the identity of the verifier is considered to be the user, and if so, the identity of the verifier is the user.

In the technical scheme provided by the embodiment of the application, the first value representing the AC component in the pulse information of the verifier is matched with the preset second value, and the second value is the value representing the AC component in the pre-stored pulse information of the user to determine whether the verification is passed.

Specifically, please refer to fig. 2-1, which is a schematic diagram of a verification method, the verification method includes:

101. first pulse information input by a verifier is acquired. The first pulse information of the verifier is used for the identity of the verifier, and if the identity of the verifier is a certain user and the identity of the user is qualified to be verified, the verification can be passed.

102. A first value characterizing an Alternating Current (AC) component is obtained from the first pulse information. This feature of the AC component, which is not a numerical value and therefore requires a first value characterizing the AC component, verifies the identity of the verifier.

103. And matching the first value with a pre-stored second value, wherein the second value is a value representing the AC component in the pre-stored second pulse information of the user.

104. If the matching is unsuccessful, the verification is not passed. In some possible embodiments, the matching of the AC component may be only one of the necessary verification methods, and if the matching is not successful, the verification may not be passed, and if the matching is successful, the matching of other verification conditions may be continued.

Referring to fig. 2-2, another schematic diagram of an authentication method is shown, which includes:

201. first fingerprint information input by the verifier is acquired.

In this embodiment of the application, the verifier may input the first fingerprint information of the verifier on the verification device, and the verification device may be a fingerprint identification apparatus, such as a mobile phone or an access control device, which is not limited herein. The first fingerprint information of the verifier can be the fingerprint information of any one of the 10 fingers, and can also be the fingerprint information of other people imitated by the silica gel material, and the verifier covers the first fingerprint information on the hand of the verifier and attempts to pass the verification.

202. The detection light was emitted N times at different time points using 2 different spectrum light sources.

When the verifier extends a finger or other part into the verification area of the verification device, taking the finger as an example, the verification device can illuminate the finger with 2 light sources of different spectra, respectively, due to the acquisition of the first pulse signal of the verifier.

203. And 2 photo sensors are used for receiving the optical signals after the reflection or transmission of the detection light to obtain values of 2 parts of N PPG signals, wherein N is an integer greater than 2, the first photo sensor is used for receiving the optical signals after the reflection or transmission of the first light source, and the second photo sensor is used for receiving the optical signals after the reflection or transmission of the second light source.

The verification device includes 2 photo sensors for receiving light reflected or projected by the finger after the 2 light sources with different spectra are irradiated on the finger in step 202, and after N times of irradiation, the obtained optical signal is converted into an electrical signal to obtain 2 values of N PPG signals, which are used as PPG information and used as first pulse information of the user.

2041. A first variance of the values of the N PPG signals is calculated.

In this embodiment, the PPG signal includes information of a DC component and information of an AC component, where to characterize the AC component, a first variance of the PPG signal acquired N times may be calculated, resulting in a first value characterizing the AC component.

2042. And comparing the difference between the first variance and a second variance, wherein the second variance is the variance of the pre-stored values of M PPG signals of the user and is used as the second value, and M is a positive integer greater than 2.

In the embodiment of the present application, since values representing AC components of one or more users are stored in advance, since a user has previously entered fingerprint information and PPG information of the user, where the PPG information includes an AC component, the value representing the AC component is a variance of M PPG signals of the user, which is obtained in advance, and is used as a second value, the first value and the second value may be compared to determine whether the verifier and the user are the same person.

2043. If the difference is not within the preset range, the verification is not passed.

Specifically, the difference between the first value and the second value may be calculated to see whether the difference is within a preset range, if not, the verification is not passed, and if the difference is within the range, other information, such as a value representing the DC component, or a fingerprint, or a password, may be determined, which is not limited herein.

2044. And if the difference value is within a preset range, the verification is passed.

In some possible embodiments, it may also be determined that the user and the verifier are the same person if the difference is within a preset range, without verifying other information, which is not limited herein.

2051. A first mean of the values of the N PPG signals is calculated.

Since the PPG signal comprises information of the AC component and information of the DC component, the DC component can also be characterized by one value, referred to as third value. In some possible embodiments, a first mean value of the N PPG signals may be obtained as a third value, which is used to compare with a pre-stored value to verify that the verifier's identity and the user are the same person.

2052. And comparing the difference value between the first mean value and a second mean value, wherein the second mean value is a mean value of the pre-stored values of the M PPG signals of the user and is used as the fourth value, and M is a positive integer greater than 2.

The second mean value is a mean value of the M PPG signals of the pre-stored user, also referred to as fourth value. It should be noted that M may or may not be equal to N, and is not limited herein. And comparing the first average value with the second average value to obtain the difference value of the first average value and the second average value.

2053. If the difference is not within the preset range, the verification is not passed.

After the difference value is obtained, whether the difference value is within a preset range can be judged, and if the difference value is not within the preset range, the verification is not passed.

2054. And if the difference value is within a preset range, the verification is passed.

If the difference value of the AC component is within the preset range, it may be determined that the authentication is passed, or further determine other messages, which is not limited herein.

2061. And matching the first fingerprint information with pre-stored second fingerprint information, wherein the second fingerprint information is pre-stored fingerprint information of the user.

In some possible embodiments, it may be further determined that the first fingerprint information matches with pre-stored second fingerprint information, where the fingerprint information is fingerprint information pre-entered by the user.

2062. If the match is unsuccessful, the verification is not passed.

It should be noted that, in the embodiment of the present application, it is necessary for the verifier to verify the AC component of the pulse information of the verifier, and it is optional to verify the DC component of the pulse information and the fingerprint information of the verifier.

According to the technical scheme provided by the embodiment of the application, the first value representing the AC component in the pulse information of the verifier is compared with the preset second value, the third value representing the DC component is matched with the fourth value, or the first fingerprint information of the verifier is matched with the pre-stored second fingerprint information, so that whether verification is passed or not is determined, the counterfeit difficulty is increased, and the verification safety is improved.

It is noted that the pulse signal of the PPG technique comprises a slowly varying Direct Current (DC) component and a pulsatile varying Alternating Current (AC) component related to tissue structure and blood flow. The absorbance of non-blood tissue such as muscle, bone, etc. in biological tissue is kept constant, and the absorbance of venous blood in blood tissue can also be considered relatively stable, which have a major contribution to the DC component. In blood, the fluctuation of venous blood is very weak and negligible relative to arterial blood, so that the AC component of the pulsation change is considered to be mainly caused by the filling of arterial blood, and under the irradiation of a light source with a constant wavelength, the pulse signal of a human body can be indirectly measured by detecting the light intensity transmitted through a finger. It should be noted that the amplitude of the AC component is typically 1% -2% of the DC component, and is superimposed on the DC component.

Referring to fig. 3-1 (fig. 3-1 is a schematic diagram of obtaining a pulse signal of a user under the PPG technology), in an embodiment of the present application, when a fingerprint identification terminal uses the PPG technology to enter or verify a fingerprint of the user, a Light Emitting Diode (LED) may be used to emit Light to a finger, reflect or project the Light to a Photodiode (PD), and the PD determines the pulse signal of the user according to the received Light. Generally, the LED light may be transmissive or reflective, and in some door access devices, the transmissive type is used, and in mobile phones, the reflective type is generally used.

It should be noted that, when the fingerprint identification terminal has a function of identifying pulse signals by using PPG technology, a fingerprint sensing area, a light source and a light sensor may be built in the fingerprint identification terminal. The fingerprint sensing area is used for sensing a finger of a user to acquire user fingerprint information, the light source is used for emitting light to irradiate the finger, and the light sensor is used for receiving the light emitted by the light source and reflected by the finger or projected by the light source to generate a digital signal.

Specifically, when the LED light is emitted to the skin, the light reflected back through the skin tissue is received by the photosensitive sensor and converted into an electric signal, and then the electric signal is converted into a digital signal, and the simplification process is as follows: optical signal- > electrical signal- > digital signal. When light penetrates through skin tissue and is reflected to the photosensitive sensor, the light is attenuated to a certain degree, and the light is absorbed basically invariably due to muscle, bone or vein and other connecting tissues, but the absorption of the light naturally changes due to the blood flowing in the artery, so that the characteristic of the blood flowing can be reflected when the light is converted into a PPG signal. The PPG waveform shown in fig. 3-2 is a pulse wave signal converted from an electrical signal acquired by the PD. (fig. 3-2, a schematic of a PPG waveform diagram) in which the abscissa is time and the ordinate is the received light intensity. It is noted that the waveform of PPG is composed of a Direct Current (DC) component and an Alternating Current (AC) component, the DC component corresponding to the detected light signal transmitted or reflected from the tissue, depending on the structure of the tissue and the mean blood flow of arterial and venous blood, the DC component varying slowly with respiration; the AC component shows the change in blood volume that occurs between the systolic and diastolic phases of the cardiac cycle, and the fundamental frequency of the AC component depends on the heart rate and is superimposed on the DC component.

In the present embodiment, for better description, the PPG waveform can be simplified as shown in fig. 3-3 (fig. 3-3 is a schematic diagram of the PPG waveform using a wavy line to simplify the alternative electrocardiogram).

It should be noted that, as shown in fig. 3-4 (fig. 3-4 is a schematic diagram of acquiring a pulse signal by a fingerprint identification terminal), when a finger is detected by the fingerprint identification terminal, the light intensity reflected by the PPG varies with the pulse of the user to obtain the pulse signal of the user, and when the finger is not detected by the fingerprint identification terminal, the light intensity reflected by the PPG is theoretically zero, but since there are some other interfering light rays in the natural environment, the detected light intensity is not zero, and it is assumed here that the light intensity is a fixed value.

In some possible embodiments, the ordinate of the PPG waveform may also be the light absorption, i.e. the absorption of the reflected light by the finger, as shown in fig. 3-5 (fig. 3-5 are PPG waveforms whose ordinate is the light absorption), which is more common in general and will be used in the following discussion.

In some possible embodiments, as shown in fig. 3 to 6 (fig. 3 to 6 are schematic diagrams of internal structures of the fingerprint touch pad), the fingerprint touch pad may include an isolation material, an Active Front End (AFE), an integrated circuit (ASIC), and a connection line. As shown in fig. 3-7 (fig. 3-7 are schematic diagrams of the operation principle of each component of the fingerprint touch pad), wherein the isolation material is used to prevent the PD from receiving scattered light in the integrated device, the AFE is used to drive and control the LED and the PD, the ASIC is used to calculate/retain/compare a fingerprint characteristic value, control the fingerprint sensor, control the AFE to acquire a PPG signal, calculate a PPG signal characteristic value, determine whether the detected fingerprint is a real living body, and output the result through a connection line, the connection line is used for power supply, and is used for an external input and output interface of the ASIC, so that the fingerprint touch pad as shown in fig. 3-8 (fig. 3-8 are schematic diagrams of the fingerprint touch pad acquiring second pulse information of the user) is obtained, and when a finger of the user is touched, the relevant.

The details of the structure and operation of the fingerprint sensor and PD in the mobile phone are related to the prior art in the field, and refer to chinese patent document with publication number CN107004126A, wherein paragraphs 89 to 94 and fig. 5A to 5B describe the optical sensor integrated in the capacitive sensing pixel, paragraphs 97 to 108 and fig. 7A to 7C describe the circuit diagram of an exemplary hybrid fingerprint sensing element or pixel 700, wherein the hybrid fingerprint sensing element or pixel has both the capacitive sensing and optical sensing functions of fingerprint, paragraphs 112 to 116 and fig. 9A to 9B describe the living fingerprint detection based on the blood light absorption at different optical wavelengths. If more specific internal components and implementations thereof are desired, reference is made to other relevant portions of this patent document.

In the embodiment of the application, in the process of using the PGG technology, the fingerprint identification technology identifies not only the DC component but also the AC component thereof, so that the simulated fingerprint needs to pass the verification of the DC component and the verification of the AC component, and unless the optical characteristics of the simulated fingerprint are made to be completely consistent with the skin of the user, the waveform characteristics of the PGG of the simulated fingerprint are difficult to be consistent with the characteristics of the real PPG waveform diagram of the user, thereby greatly increasing the difficulty of fingerprint counterfeiting.

The following describes AC and DC in the PGG, respectively, with reference to the drawings. It is assumed that the fingerprint recognition terminal previously acquires the fingerprint of the user and the pulse signal thereof, wherein the PPG waveform comprises a DC component and an AC component, as shown in fig. 4-1 (fig. 4-1 is a schematic diagram of the PPG waveform passing through the pulse signal of the user). The DC component may be represented as a section [ L, L + R ], and if the DC component of the detected verification fingerprint is in the section [ L, L + R ], the DC component may be considered to be matched, and the AC component may represent an image in the R section, and when the features of the AC component of the verification fingerprint are similar to enough features of the image in the R section, the AC component may be considered to be matched.

As shown in fig. 4-2 (fig. 4-2, which is a schematic diagram of a verifier performing fingerprint verification on a fingerprint identification terminal), when the verifier places a finger on a fingerprint identification area of the fingerprint identification terminal, the fingerprint identification terminal detects a PPG signal, and if the detected PPG waveform is shown by a dotted line thereof, and a DC component of the detected PPG waveform does not match an input fingerprint stored by a user in fig. 4-1, the verifier and the user may be considered to be inconsistent, and the verification is not passed.

As shown in fig. 4-3 (fig. 4-3, which is a schematic diagram of a verifier performing fingerprint verification on a fingerprint identification terminal by using a prosthetic finger), when the verifier places a finger on a fingerprint identification area of the fingerprint identification terminal, the fingerprint identification terminal detects a PPG signal, and if a detected PPG waveform is shown by a dotted line, a DC component of the detected PPG waveform matches an entered fingerprint stored by a user in fig. 4-1, but an AC component is not detected, the finger can be considered as not living, and the finger is a prosthetic made of a material, and the authentication is not passed.

As shown in fig. 4-4 (fig. 4-4 is a schematic diagram of a verifier performing fingerprint verification on a fingerprint identification terminal), when the verifier places a finger on a fingerprint identification area of the fingerprint identification terminal, the fingerprint identification terminal detects a PPG signal, and if the detected PPG waveform is shown by a dotted line, a DC component of the detected PPG waveform matches an entered fingerprint stored by the user in fig. 4-1, and an AC component is detected, the finger can be considered as a living body, but obviously the AC component of the detected PPG waveform does not match the AC component of the user, and the authentication is not passed.

As shown in fig. 4-5 (fig. 4-5, which is another schematic diagram of the verifier performing fingerprint verification on the fingerprint identification terminal), when the verifier places a finger on the fingerprint identification area of the fingerprint identification terminal, the fingerprint identification terminal detects a PPG signal, if the detected PPG waveform is shown by a dotted line thereof, a DC component thereof matches the entered fingerprint stored by the user in fig. 4-1, and an AC component thereof is detected, the finger can be considered as a living body, and the AC component thereof matches the AC component of the user, and if the fingerprints are also matched, the verifier and the user can be considered as the same person through verification.

In the embodiment of the present application, the specific functions of the fingerprint identification terminal may include two functions of entering a fingerprint and verifying the fingerprint, which are described below respectively. As shown in fig. 5-1 (fig. 5-1, a schematic flow chart of entering a fingerprint for a fingerprint identification terminal), when the fingerprint identification terminal enters a fingerprint, fingerprint information of a user and a PPG oscillogram of pulse information may be obtained, where the PPG oscillogram includes a DC component and an AC component, and features of the DC component and features of the AC component are extracted according to the DC component and the AC component, respectively, and are stored. In addition, the user may enter identity information, such as job number, gender, name, etc. It should be noted that the process of inputting the identity information may be before inputting the fingerprint, or after inputting the fingerprint, or during inputting the fingerprint, and there is no time sequence relationship.

When the fingerprint is verified, as shown in fig. 5-2 (fig. 5-2 is a schematic flow chart of the fingerprint verification by the fingerprint recognition terminal), the verifier may place a finger in the fingerprint recognition area, and the fingerprint recognition terminal may obtain fingerprint information of the user and a PPG waveform of the pulse information, where the PPG waveform includes a DC component and an AC component, and extracts a feature of the DC component and a feature of the AC component according to the DC component and the AC component, respectively, and then compares the stored features of the DC component and the AC component of the user and the verifier, if the comparison result is a match and the fingerprint matches, the verification may be passed, and if the comparison result is a mismatch, the verification may not be passed.

In the embodiment of the present application, the features of the DC component and the features of the AC component may be extracted and compared with the features of the DC component and the features of the AC component of the authentication fingerprint and the entry fingerprint.

Specifically, when a finger contacts the fingerprint identification area, the fingerprint identification terminal detects a PPG signal, and then the LED may be turned on to obtain a current PPG signal value PPG through the PD, turn off the LED, obtain a current PPG signal value PPG ", and subtract the PPG" from the PPG' to obtain a true PPG signal value of the current PPG signal. In some possible embodiments, since there may be other light sources even without light from the LED, it is necessary to obtain two values by turning on and off the LED, respectively, and calculate the absolute value of the difference between the two values. For better verification, two or more light sources with different spectra may be used, and when detecting a finger, 2 different waveforms may be obtained, as shown in fig. 5-3 (fig. 5-3 is a schematic diagram of two different PPG waveforms obtained by illuminating with two light sources with different spectra), and two different DC components and AC components are obtained respectively. In the following, 2 light sources with different spectra are taken as an example, the 2 light sources with different spectra are led1 and led2, respectively, when the fingerprint identification terminal operates, as shown in fig. 5-4 (fig. 5-4 is a schematic flow chart in which the 2 light sources with different spectra are sequentially turned on and off to collect PPG signals), led1, led1, led2, led2 can be turned on and off, and PPG1i and PPG2i (i ═ 1, 2, … …, n) can be obtained by repeating the steps of turning on led1, turning off led1, turning on led2, turning off led2, and performing the steps n, so that the features of the DC component and the features of the AC component under led1 and led2 light sources can be extracted, respectively compared when a fingerprint is verified, the features of the DC component and the features of the AC component under the led1 and led2 light sources are both matched, and the fingerprints are matched, so that the security can be greatly enhanced by verification. It should be noted that the light sources with different spectrums can be respectively green and blue, or red and yellow, or blue and yellow, and are not limited herein.

Since the PPG signal fluctuates with time, the data of the PPG signal acquired at one time does not reflect the real situation, so the value of the PPG signal can be acquired multiple times, for example, n times, to obtain PPGi, (i ═ 1, 2, … …, n). Led is calculated by accumulating PPGi, (i ═ 1, 2, … …, n), and dividing by n. Since the DC component is an interval, a preset value x may be preset, and the interval of the DC component may be represented as an interval [ dc.led-x, dc.led + x ], and if the mean value of the DC component of the fingerprint is verified to be in the interval [ dc.led-x, dc.led + x ], the DC components of the two may be considered to be matched. In the embodiment of the present application, since the AC component fluctuates, it may be determined whether the AC component matches using a variance (or standard deviation), specifically, after acquiring PPGi, (i ═ 1, 2, … …, n), the variance is calculated to obtain a value ac.led of the AC component, and if the AC component is an AC component of the entry fingerprint, the ac.led is stored, and a value y (y > 0) is preset, so that when the absolute value of the difference between the variance of the AC component of the authentication fingerprint of the verifier and the ac.led is detected to be smaller than y, the authentication fingerprint and the AC component of the entry fingerprint may be considered to be matched.

If more than two spectra of light sources are used, there is a problem of how to arrange the 2 light sources and the photo-sensors, and in order to achieve a certain signal-to-noise ratio of the PPG signal, a certain distance between the light sources and the photo-sensors is usually optimal. Meanwhile, the integrity of the fingerprint sensing area cannot be damaged by the layout of the light source and the light sensor, and otherwise, the fingerprint identification is influenced. The following description will take 2 light sources led1 and led2 and one photo sensor PD as an example.

In some possible embodiments, assuming that the optimal distance between led1 and PD is L1, the optimal distance between led2 and PD is L2, the width of the fingerprint identification area is W, and L1 > L2. In some possible embodiments, when there are only 1 PD and W > L1, led1 and led2 and the PD are arranged along the long edge of the fingerprint sensing area, as shown in fig. 5-5 (fig. 5-5 are schematic layout diagrams of led1, led2 and the PD), wherein (a) is suitable only for a scene where the space between led1 and the PD can place led2, and (b) is suitable for a scene where the space between led1 and the PD cannot accommodate led 2. When W < L1, PD is in the middle of one side of the long side of the fingerprint sensing area, led1 is arranged on the opposite side of the long side of the fingerprint sensing area, and led2 can be arranged on the same side or on the opposite side of the PD, as shown in FIGS. 5-6 (FIGS. 5-6, which is another layout diagram of led1, led2 and PD).

When 2 photo sensors PD are used, PD1 and PD2 respectively, wherein the light sources led1, led2 and PD1, PD2 are all as close to the edge of the fingerprint sensing area as possible and as close to the central axis as possible. Among them, as shown in fig. 5-7 (fig. 5-7, are layout diagrams of led1, led2, PD1 and PD 2), L1 < W is only suitable for (d), and (e) is suitable for W < L2. In addition, as shown in fig. 5-8 (fig. 5-8, which is another layout diagram of led1, led2, PD1 and PD 2), there is also a (f) way for 2 sensors, i.e., PD1 and PD2 are connected in parallel. At this time, the identification control device pairs led1 and led2 obtain the sum of signals obtained by PD1 and PD2, similar to the case of only 1 photo sensor PD.

Hereinafter, the recording and verification of fingerprints at the time of the small entry of company a will be described as an example, as shown in fig. 6-1 (fig. 6-1 is a schematic flow chart of the operation of the door access device).

And S1, recording the fingerprint.

When a person goes to a company on the first day and needs to input own identity information and fingerprint information, the person inputs own fingerprint and other information on an access control machine of the company. Other information includes identity information, such as name, gender, height, work station, job number, position, graduation year, etc., and may include iris information, etc., without limitation. The measure can place a finger in the fingerprint sensing area of the door lock, and then start to read the fingerprint of the measure, as shown in fig. 6-2 (fig. 6-2 is a schematic diagram of the user placing a finger in the fingerprint recognition area of the door lock).

S2, lightening led1, acquiring PPG signals PPG1.i, extinguishing led1 and acquiring PPG signals PPG1. i'.

When the door access machine senses that objects exist in the fingerprint sensing area, the door access machine can start working. First, led1 may be illuminated, as in fig. 6-3 (fig. 6-3, a schematic of the fingerprint identification terminal illuminated led 1), for acquiring PPG signal PPG1.1 ', then extinguished resulting in PPG signal PPG1.1 ", then PPG 1.1' -PPG1.1 ″ -PPG1 is calculated. led1 may be lit and extinguished n times, yielding the values of the PPG signal n times, yielding PPG1.i 'and PPG1.i ", respectively, (i ═ 1, 2, … …, n), then the value of the PPG signal PPG1.i may be calculated by subtracting PPG1. i" from PPG1. i'.

S3, lighting the LED2, acquiring a PPG signal PPG2-i, turning off the LED2 and acquiring a PPG signal PPG 2-i'.

Likewise, led2 may be illuminated, as in fig. 6-4 (fig. 6-4, which is a schematic of the illuminated led2 of the fingerprint recognition terminal), for acquisition of PPG signal PPG2.1 ', and then extinguished to obtain PPG signal PPG2.1 ", and then PPG 2.1' -PPG2.1 ″ -PPG2 is calculated. Led2 may be lit and extinguished n times, yielding the values of the PPG signal n times, yielding PPG2.i 'and PPG2.i ", respectively, (i ═ 1, 2, … …, n), then the value of the PPG signal PPG2.i may be calculated by subtracting PPG2. i" from PPG2. i'.

It should be noted that led1, extinguished 1, lit 2, and extinguished 2 may be turned on in sequence, or led1, extinguished 1, then led2, and extinguished 2 may be turned on n times, which is not limited herein.

And S4, calculating a mean value.

In the embodiment of the present application, a mean value of ppg1.i (i ═ 1, 2, … …, n) may be calculated to obtain dc.led1, a mean value of ppg2.i (i ═ 1, 2, … …, n) may be calculated to obtain a value of dc.led2, and the dc.led1 and dc.led2 may be stored as characteristics of the DC component.

And S5, calculating the variance.

In the embodiment of the present application, it is possible to calculate a variance of ppg1.i (i ═ 1, 2, … …, n) to obtain ac.led1, calculate a variance of ppg2.i (i ═ 1, 2, … …, n) to obtain a value of ac.led2, and store the ac.led1 and ac.led2 as characteristics of the AC component.

When the fingerprint is input, the characteristics of the DC component and the AC component of the fingerprint of the small display are stored, the identity information input by the small display is received, and the identity information corresponds to the fingerprint, the characteristics of the DC component and the characteristics of the AC component and serves as the basis for the identity verification of the small display.

And S6, verifying the fingerprint.

In this embodiment of the application, when a user needs to verify a fingerprint, the finger can be placed in the fingerprint verification portion, and then the gate inhibition machine acquires the characteristics of the DC component and the characteristics of the AC component of the PPG signal of the fingerprint of the verifier. If the average of the DC components under led1 and led2 of the verifier is p1 and p2, and the DC component of the small aged is characterized by q1 and q2, assuming the preset values x1 and x2(q1, q2 > x1, x2 > 0), if p1 is in the interval [ q1-x1, q1+ x1], p2 is in the interval [ q2-x2, q2+ x2], the DC component of the verifier is matched with the DC component of the small aged.

Similarly, if the variances of the AC components under led1 and led2 of the verifier are p1 and p2, and the AC component of the small aged is characterized by q1 and q2, assuming preset values y1 and y2(q1, q2 > y1, y2 > 0), if p1 is in the interval [ q1-y1, q1+ y1], p2 is in the interval [ q2-y2, q2+ y2], the AC component of the verifier is matched with the AC component of the small aged.

And S7, verifying pass/fail.

In the embodiment of the present application, when the DC component and the AC component are matched and the fingerprint information is also matched, the authentication can be passed.

The above is described by way of method, and the following is described by way of functional device, please refer to fig. 2-3, which are schematic diagrams of an authentication apparatus, the authentication device includes:

the second aspect of the embodiment of the present application provides an authentication device 300, where the authentication device 300 includes an obtaining module 301, a processing module 302, a matching module 303, and a determining module 304, where the obtaining module 301 is configured to obtain first pulse information input by a verifier, the processing module 302 is configured to obtain a first value representing an alternating current AC component from the first pulse information, the matching module 303 is configured to match the first value with a pre-stored second value, the second value being a value representing an AC component in second pulse information of a pre-stored user, and the determining module 304 is further configured to fail authentication if the matching is unsuccessful.

Specifically, the obtaining module 301 may obtain the values of the PPG signals of the verifier at different time points N times, respectively, to obtain N values of the PPG signals, where N is a positive integer greater than 2; the processing module is specifically configured to calculate a first variance of the values of the N PPG signals, and use the first variance as the first value. The matching module 303 may compare a difference between the first variance and a second variance, where the second variance is a variance of pre-stored values of M PPG signals of the user as the second value, and M is a positive integer greater than 2; if the difference is not in the preset range, the first value and the second value are not matched successfully, and the verification is not passed. If the matching is successful, the verification of the determining module is passed, if the difference is within a preset range, and if the matching is unsuccessful, the verification of the determining module is not passed.

In some possible embodiments, the processing module 302 may further obtain a third value characterizing the DC component from the first pulse information, and the matching module 303 matches the third value with a pre-stored fourth value, where the fourth value is the value characterizing the DC component in the pre-stored second pulse information of the user, and if the matching is not successful, the determining module 304 fails the verification.

In some possible embodiments, the obtaining module 301 may obtain the values of the PPG signals of the verifier P times at different time points, resulting in P values of the PPG signals, where P is a positive integer greater than 2; the processing module 302 is further specifically configured to calculate a first mean value of the P PPG signal values as the third value, then the matching module 303 compares a difference between the first mean value and a second mean value, where the second mean value is a mean value of pre-stored M PPG signal values of the user as the fourth value, M is a positive integer greater than 2, and if the difference is not within a preset range, the third value and the fourth value are not successfully matched, the determining module 304 fails the verification.

In some possible embodiments, the obtaining module 301 may be a photoelectric sensor, configured to obtain pulse information of the verifier to obtain the first pulse information, where the first pulse information includes L pulse information, and L is a positive integer greater than or equal to 2.

Specifically, the photoelectric sensor may include L light sources and T photo sensors of different spectrums, where the L light sources of different spectrums emit detection light, the T photo sensors receive optical signals after reflection or transmission of the detection light to obtain the first pulse information, and T is a positive integer less than or equal to L.

In some possible embodiments, the obtaining module 301 may further obtain first fingerprint information input by the verifier, and the matching module 303 matches the first fingerprint information with pre-stored second fingerprint information, where the second fingerprint information is pre-stored fingerprint information of the user, so that if the matching is not successful, the determining module 304 may fail the verification.

Embodiments of the present application also provide a verification device comprising a touchscreen, one or more processors, memory, one or more applications, wherein the touchscreen comprises a touch-sensitive surface and a display, wherein the one or more programs are stored in the memory, the one or more programs comprising instructions that, when executed by the electronic device, cause the electronic device to perform the steps of:

acquiring first pulse information input by a verifier, acquiring a first value representing an Alternating Current (AC) component from the first pulse information, and matching the first value with a pre-stored second value, wherein the second value is the value representing the AC component in the pre-stored second pulse information of the user, and if the matching is unsuccessful, the verification fails.

Specifically, the values of the PPG signals of the verifier may be obtained N times at different time points, respectively, to obtain N values of the PPG signals, where N is a positive integer greater than 2, and then a first value characterizing the AC component is obtained from the first pulse information, specifically, a first variance of the values of the N PPG signals is calculated, the first variance is used as the first value, then a difference between the first variance and a second variance is compared, the second variance is a variance of values of M PPG signals of the user that are prestored as the second value, and M is a positive integer greater than 2, if the difference is not within a preset range, the first value and the second value are not successfully matched, the verification is failed, and if the difference is within a preset range, the first value and the second value are successfully matched, the verification is passed.

In some possible embodiments, a third value representing the DC component may be obtained from the first pulse information, the third value is matched with a pre-stored fourth value representing the DC component in the second pulse information of the user, and if the matching is not successful, the verification is not passed.

In some possible embodiments, the specific manner of obtaining the third value may be to obtain the values of the PPG signals of the verifier P times at different time points, respectively, to obtain P values of the PPG signals, where P is a positive integer greater than 2, calculate a first mean value of the P values of the PPG signals, and use the first mean value as the third value.

In some possible embodiments, the specific matching method may be to compare a difference between the first mean value and a second mean value, where the second mean value is a mean value of pre-stored values of M PPG signals of the user as the fourth value, where M is a positive integer greater than 2, and if the difference is not within a preset range, the third value and the fourth value are not successfully matched, the verification is not passed. Since the verification is performed by comparing the DC component and the AC component, the difficulty of counterfeiting is increased, and the security of the verification is enhanced.

In some possible embodiments, the specific method for obtaining the pulse information may be to obtain the pulse information of the verifier by using a photosensor, and obtain the first pulse information, where the first pulse information includes L pulse information, where L is a positive integer greater than or equal to 2.

Specifically, the L light sources in the photoelectric sensor are used for emitting detection light, and the T photo sensors are used for receiving optical signals after reflection or transmission of the detection light to obtain the first pulse information, wherein T is a positive integer less than or equal to L.

Specifically, L may be equal to 2, where the first optical sensor is configured to receive the optical signal reflected or transmitted after being irradiated by the first light source, and the second optical sensor is configured to receive the optical signal reflected or transmitted after being irradiated by the second light source.

In some possible embodiments, the first fingerprint information input by the verifier may be further obtained, the first fingerprint information is matched with pre-stored second fingerprint information, the second fingerprint information is pre-stored user fingerprint information, and if the matching is unsuccessful, the verification is not passed.

Since the authentication is performed by comparison of the DC component and/or the AC component and/or the fingerprint, the difficulty of forgery is increased, and the security of the authentication is enhanced.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A method of authentication, comprising:

acquiring first pulse information input by a verifier;

obtaining a first value representing an Alternating Current (AC) component from the first pulse information;

matching the first value with a pre-stored second value, wherein the second value is a value representing an AC component in pre-stored second pulse information;

if the matching is unsuccessful, the verification is not passed;

the obtaining of the first pulse information input by the verifier specifically includes:

obtaining the values of the PPG signals of the verifier at different time points N times, respectively, obtaining N values of the PPG signals as the first pulse information, where N is a positive integer greater than 2;

the obtaining of the first value representing the alternating current AC component from the first pulse information specifically includes:

calculating a first variance of values of the N PPG signals, with the first variance as the first value.

2. The method of claim 1, wherein matching the first value with a pre-stored second value comprises:

comparing a difference between the first variance and a second variance, wherein the second variance is a variance of pre-stored values of M PPG signals of the user and is used as the second value, and M is a positive integer greater than 2;

if the matching is unsuccessful, the verification is not passed, including:

and if the difference is not in the preset range and the first value and the second value are unsuccessfully matched, the verification is failed.

3. The method of claim 1, wherein the method further comprises:

and if the matching is successful, the verification is passed.

4. The method of claim 3, wherein the method further comprises:

comparing a difference between the first variance and a second variance, wherein the second variance is a variance of pre-stored values of M PPG signals of the user and is used as the second value, and M is a positive integer greater than 2; and if the difference value is within a preset range, the first value and the second value are successfully matched, and the verification is passed.

5. The method according to any one of claims 1-4, further comprising:

obtaining a third value representing a Direct Current (DC) component from the first pulse information;

matching the third value with a prestored fourth value, wherein the fourth value is a value representing a DC component in prestored second pulse information of the user;

and if the matching is unsuccessful, the verification is not passed.

6. The method according to claim 5, wherein the acquiring the first pulse information input by the verifier specifically comprises:

respectively acquiring the values of the PPG signals of the verifier for P times at different time points to obtain P values of the PPG signals, wherein P is a positive integer greater than 2;

the obtaining a third value characterizing a Direct Current (DC) component from the first pulse information includes:

calculating a first mean of the values of the P PPG signals, with the first mean as the third value.

7. The method of claim 6, wherein matching the third value with a pre-stored fourth value comprises:

comparing a difference value between the first mean value and a second mean value, wherein the second mean value is a mean value of prestored values of M PPG signals of the user and is used as the fourth value, and M is a positive integer greater than 2;

if the matching is unsuccessful, the verification is not passed, including:

and if the difference is not in the preset range and the third value and the fourth value are unsuccessfully matched, the verification is failed.

8. The method according to any one of claims 1-4, wherein said obtaining the first pulse information inputted by the verifier comprises:

and acquiring pulse information of the verifier by using a photoelectric sensor to obtain the first pulse information, wherein the first pulse information comprises L pieces of pulse information, and L is a positive integer greater than or equal to 2.

9. The method of claim 8, wherein the obtaining the pulse information of the verifier using the photosensor comprises:

the L light sources emit detection light;

and receiving the optical signals after the detection light is reflected or transmitted by using T optical sensors to obtain the first pulse information, wherein T is a positive integer less than or equal to L.

10. The method of claim 8, wherein L is equal to 2.

11. The method of claim 10, wherein T is equal to 2, and wherein a first light sensor is used to receive the reflected or transmitted light signal after illumination by the first light source, and a second light sensor is used to receive the reflected or transmitted light signal after illumination by the second light source.

12. The method according to any one of claims 1-4, further comprising:

acquiring first fingerprint information input by the verifier;

matching the first fingerprint information with pre-stored second fingerprint information, wherein the second fingerprint information is pre-stored fingerprint information of a user;

and if the matching is unsuccessful, the verification is not passed.

13. An authentication device, characterized in that it comprises functional modules for performing the method according to any one of claims 1 to 12.

14. An authentication apparatus comprising a touchscreen, fingerprint recognition means, memory, one or more processors, and one or more programs; wherein the one or more programs are stored in the memory; wherein the one or more processors, when executing the one or more programs, cause the authentication device to perform the method of any of claims 1 to 12.

15. A computer program product, characterized in that, when run on an authentication device, causes the authentication device to perform the method according to any of claims 1-12.

16. A computer-readable storage medium comprising instructions that, when executed on an authentication device, cause the authentication device to perform the method of any one of claims 1-12.