KR20190077850A - System for user authentification - Google Patents

Abstract

The present invention provides a user authentication system which comprises: a first preliminary authentication unit performing user authentication by fingerprint information of a user using at least one fingerprint sensor; a second preliminary authentication unit performing user authentication by electrocardiogram information of the user using a first electrode and a second electrode; and a final authentication unit finally performing user authentication by using the authentication result of the first preliminary authentication unit and the authentication result of the second preliminary authentication unit.

Description

[0001] SYSTEM FOR USER AUTHENTIFICATION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a user authentication system, and more particularly, to a user authentication system in which security is enhanced by using biometric signals of a fingerprint and an electrocardiogram.

The use of biometric information, such as fingerprints, electrocardiograms, and irises, has made authentication of users very common in recent years. However, when performing user authentication using only one type of biometric information, there is still a worrying aspect in security of the authentication.

However, when the user authentication is performed using two or more types of biometric information, the complexity of the device and the troublesome measurement are expected to increase, and a solution is needed.

Japanese Laid-Open Patent Publication No. 10-2017-0112814 (a sensor capable of enhancing security using biometric information, a mobile device including the sensor, and an authentication method of the mobile device) uses two or more pieces of biometric information A mobile device capable of performing user authentication is disclosed.

However, in the case of Korean Patent Laid-Open Publication No. 10-2017-0112814, it is expected that the fingers of both hands are somewhat inconvenient when measuring.

An object of the present invention is to provide a user authentication system capable of conveniently acquiring two pieces of biometric information and performing user authentication.

The user authentication system of the present invention includes: a first preliminary authentication unit for performing user authentication based on fingerprint information of a user using at least one fingerprint sensor; A second preliminary authentication unit for authenticating a user based on electrocardiographic information of the user using the first electrode and the second electrode; And a final authentication unit which finally authenticates the user using the authentication result of the first preliminary authentication unit and the authentication result of the second preliminary authentication unit.

According to another aspect of the present invention, there is provided a user authentication system including a first fingerprint sensor and a second fingerprint sensor, wherein at least three surfaces or four surfaces of the outer circumference of the first fingerprint sensor among the at least one fingerprint sensor are surrounded by the first fingerprint sensor, It is preferable that the first electrode is disposed. The first fingerprint sensor and the first electrode are disposed at a noncontact portion of the wearable device when the wearable device is worn, and the second electrode is disposed at a human-contact portion when the wearable device is worn.

Preferably, the first preliminary authentication unit includes a first feature point extractor for extracting fingerprint feature points using information obtained from the first fingerprint sensor; And a first similarity meter for comparing the fingerprint feature points extracted from the first feature point extractor with previously stored fingerprint feature points and measuring the first similarity degree.

The second preliminary authentication unit may include an analog front end for amplifying the analog signal output from the first electrode and the second electrode and converting the amplified analog signal into a digital signal; A second feature point extractor for extracting ECG feature points using information obtained from the digital signal output from the analog front end; And a second degree-of-similarity measuring unit for measuring a second degree of similarity by comparing the electrocardiographic characteristic points extracted from the second characteristic point extractor with previously stored electrocardiographic characteristic points.

In addition, the second feature point extractor determines whether the digital signal output from the analog front end is an inverted signal from the signal for extracting the electrocardiographic feature point, reverses the inverted signal, and extracts the feature point of the electrocardiogram .

If the first similarity value measured by the first similarity measuring device is equal to or greater than the first value and the second similarity value measured by the second similarity measuring device is equal to or greater than the second value, Is authenticated.

According to the user authentication system of the present invention, two types of biometric information can be conveniently acquired and user authentication can be performed.

1 is a configuration diagram of a user authentication system according to a first preferred embodiment of the present invention;
FIG. 2 is an explanatory view showing the arrangement of a first fingerprint sensor, a first electrode, and a second electrode in a user authentication system according to a first preferred embodiment of the present invention; FIG.
3 is a configuration diagram of a user authentication system according to a second preferred embodiment of the present invention.
FIG. 4 is an explanatory view showing the arrangement of a first fingerprint sensor, a second fingerprint sensor, a first electrode, and a second electrode in a user authentication system according to a second preferred embodiment of the present invention. FIG.

Hereinafter, a user authentication system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

It should be understood that the following embodiments of the present invention are only for embodying the present invention and do not limit or limit the scope of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

FIG. 1 shows a configuration diagram of a user authentication system 100 according to a first preferred embodiment of the present invention.

1, the user authentication system 100 according to the first preferred embodiment of the present invention includes a first fingerprint sensor F1, a first electrode E1, a second electrode E2, 1 preliminary authentication unit 110, a second preliminary authentication unit 120, a final authentication unit 130, a first database 140, and a second database 150.

As the first fingerprint sensor F1, a sensor dedicated to a fingerprint or a camera having an image sensor incorporated therein may be used. The first electrode E1 and the second electrode E2 are dry electrodes for specifying the electrocardiogram and extract electrocardiogram signals using electrical signals between the two electrodes E1 and E2.

FIG. 2 is an explanatory view showing the arrangement of the first fingerprint sensor F1, the first electrode E1 and the second electrode E2 of the user authentication system 100 according to the first preferred embodiment of the present invention.

As can be seen from FIG. 2, the first fingerprint sensor F1 and the second fingerprint sensor F1 are arranged in such a manner that the first electrode E1 surrounds at least three surfaces or four surfaces of the outer circumference of the first fingerprint sensor F1. It is preferable that one electrode E1 be disposed. That is, the first electrode E1 may have a shape of 'c' or 'k', and the first fingerprint sensor F1 may be located inside the first electrode E1.

A plurality of first electrodes E1 are arranged around the first fingerprint sensor F1 so as to simultaneously acquire electrocardiographic information by the first electrode E1 when acquiring fingerprint information by the first fingerprint sensor F1 The first electrode E1 surrounds at least three or four surfaces of the outer circumference of the first fingerprint sensor F1.

In addition, the first fingerprint sensor F1 and the first electrode E1 are disposed at a noncontact portion when the wearable device W is worn. For authentication, the user can acquire biometric information by touching the finger to the first fingerprint sensor F1 and the first electrode E1 exposed to the outside when the wearable device W is worn.

It is preferable that the second electrode E2 is disposed at a human body contact portion when the wearable device W is worn. That is, in the case of the second electrode E2, when the user touches the first fingerprint sensor F1 and the first electrode E1 without touching the finger or the like of another user, the first electrode E1 and the second electrode E1, The electrocardiogram signal can be acquired by the second signal E2. Therefore, it can be seen that the use of the user becomes easy.

The first preliminary authentication unit 110 includes a sensor interface circuit 111, a first feature point extractor 112, and a first similarity meter 113.

The sensor interface circuit 111 serves to convert the information obtained from the first fingerprint sensor F1 into digital information. The first feature point extractor 112 extracts fingerprint feature points using information obtained from the first fingerprint sensor F1. The first similarity measuring unit 113 compares the fingerprint feature points extracted from the first feature point extractor 112 with the fingerprint feature points stored in the first database 140 to measure the first similarity.

The second preliminary authentication unit 120 includes an analog front end 121, a second feature point extractor 122, and a second similarity degree measurer 123.

The analog front end 121 amplifies and converts the analog signals output from the first electrode E1 and the second electrode E2 into digital signals. The second feature point extractor 122 extracts feature points of the electrocardiogram using the information obtained from the digital signal output from the analog front end 121. The second similarity measuring unit 123 compares the electrocardiographic feature points extracted from the second feature point extractor 122 with electrocardiographic feature points previously stored in the second database 150 to measure the second similarity.

In addition, the hand wearing the wearable device W may vary depending on the user. Someone may contact the first electrode E1 with the right finger and the second electrode E2 with the left wrist. In any other person, the first electrode E1 may contact the left finger and the second electrode E2 may contact the right wrist. Accordingly, the second feature point extractor 122 determines whether the digital signal output from the analog front end 121 is an inverted signal from the signal for extracting the ECG feature point, and if the inverted signal is the inverted signal, inverts the ECG feature point . For example, when the reference signal is stored in the second database 150 when the first electrode E1 is in contact with the right finger and the second electrode E2 is in contact with the left wrist, Since the inverted signal is outputted from the analog front end 121 when the first electrode E1 is in contact with the left finger and the second electrode E2 is in contact with the right wrist, it is necessary to match the reference signal with the phase by inverting again . Similarly, when the first electrode E1 is in contact with the left finger and the second electrode E2 is in contact with the right wrist and the feature point is stored in the second database 150, When the second electrode E2 is in contact with the finger and the second electrode E2 is in contact with the left wrist, the inverted signal is output from the analog front end 121, and therefore, it is necessary to match the reference signal and the image by inverting again.

The final authentication unit 130 finally authenticates the user using the authentication result of the first preliminary authentication unit 110 and the authentication result of the second preliminary authentication unit 120. [ Specifically, the final authentication unit 130 determines whether the first similarity value measured by the first similarity measuring unit 113 is equal to or greater than the first value, and the second similarity value measured by the second similarity measuring unit 123 is equal to or greater than If the value is greater than or equal to two, the user is finally authenticated.

As described above, according to the user authentication system 100 according to the first preferred embodiment of the present invention, by placing the electrocardiographic information of one hand at the contact portion of the wearable device W that can be obtained at any time, By touching the first fingerprint sensor F1 and the first electrode E1, two types of biometric information can be conveniently obtained and user authentication can be performed.

FIG. 3 shows a configuration diagram of a user authentication system 200 according to a second preferred embodiment of the present invention.

3, the user authentication system 200 according to the second preferred embodiment of the present invention includes a first fingerprint sensor F1, a second fingerprint sensor F2, a first electrode E1, The second electrode E2 includes a first preliminary authentication unit 210, a second preliminary authentication unit 220, a final authentication unit 230, a first database 240 and a second database 250 .

As the first fingerprint sensor F1 and the second fingerprint sensor F2, a sensor for fingerprints or a camera with an image sensor can be used. The first electrode E1 and the second electrode E2 are dry electrodes for specifying the electrocardiogram and extract electrocardiogram signals using electrical signals between the two electrodes E1 and E2.

FIG. 4 is a block diagram of the fingerprint sensor F1, the second fingerprint sensor F2, the first electrode E1 and the second electrode E2 of the user authentication system 200 according to the second preferred embodiment of the present invention. FIG.

As can be seen from Fig. 4, the first fingerprint sensor F1 and the second fingerprint sensor F1 are arranged in such a manner that the first electrode E1 surrounds at least three surfaces or four surfaces of the outer circumference of the first fingerprint sensor F1. It is preferable that one electrode E1 be disposed. That is, the first electrode E1 may have a shape of 'c' or 'k', and the first fingerprint sensor F1 may be located inside the first electrode E1.

A plurality of first electrodes E1 are arranged around the first fingerprint sensor F1 so as to simultaneously acquire electrocardiographic information by the first electrode E1 when acquiring fingerprint information by the first fingerprint sensor F1 The first electrode E1 surrounds at least three or four surfaces of the outer circumference of the first fingerprint sensor F1.

Similarly, the second fingerprint sensor F2 and the second electrode E2 are arranged such that the second electrode E2 surrounds at least three surfaces or four surfaces of the outer circumference of the second fingerprint sensor F2 . That is, the second electrode E2 may have a shape of 'c' or 'k', and the second fingerprint sensor F3 may be located inside the second electrode E2.

A plurality of second electrodes E2 are arranged around the second fingerprint sensor F2 to simultaneously acquire electrocardiographic information by the second electrode E2 when fingerprint information is acquired by the second fingerprint sensor F2 , The first electrode E1 surrounds at least three or four surfaces of the outer circumference of the second fingerprint sensor F2.

The first preliminary authentication unit 210 includes a sensor interface circuit 211, a first feature point extractor 212, and a first similarity meter 213.

The sensor interface circuit 211 serves to convert the information obtained from the first fingerprint sensor F1 and the second fingerprint sensor F2 into digital information. The first feature point extractor 212 extracts the first fingerprint feature point and the second fingerprint feature point using the information obtained from the first fingerprint sensor F1 and the second fingerprint sensor F2. In addition, the first similarity level measuring device 213 calculates the first fingerprint feature point and the second fingerprint feature point extracted from the first feature point extractor 212 and the first fingerprint feature point and the second fingerprint feature point stored in advance in the first database 240 And to measure the 1-1 similarity and the 1-2 similarity, respectively.

The second preliminary authentication unit 220 includes an analog front end 221, a second feature point extractor 222, and a second similarity degree measurer 223.

The analog front end 221 amplifies and converts the analog signals output from the first electrode E1 and the second electrode E2 into digital signals. The second feature point extractor 222 extracts feature points of the electrocardiogram using the information obtained from the digital signal output from the analog front end 221. The second similarity meter 223 measures the second similarity by comparing the ECG feature points extracted from the second feature extractor 222 with the ECG feature points previously stored in the second database 250.

In addition, the hand contacting the first electrode E1 and the second electrode E2 may vary depending on the user. Someone may contact the first electrode E1 with the right finger and the second electrode E2 with the left wrist. In any other person, the first electrode E1 may contact the left finger and the second electrode E2 may contact the right wrist. Accordingly, the second feature point extractor 222 determines whether the digital signal output from the analog front end 221 is an inverted signal from the signal for extracting the ECG feature point, and if it is an inverted signal, inverts the ECG feature point again . For example, when the reference signal is stored in the second database 250 when the first electrode E1 is in contact with the right finger and the second electrode E2 is in contact with the left wrist, When the first electrode E1 touches the left finger and the second electrode E2 touches the right wrist, the inverted signal is output from the analog front end 221, so that it is necessary to match the reference signal with the phase by inverting again . Similarly, when the first electrode E1 is in contact with the left finger and the second electrode E2 is in contact with the right wrist and the feature point is stored in the second database 250, When the second electrode E2 is in contact with the finger and the second electrode E2 is in contact with the left wrist, the inverted signal is output from the analog front end 221, and therefore it is necessary to match the reference signal and the image by inverting again.

The final authentication unit 230 uses the authentication result of the first preliminary authentication unit 210 and the authentication result of the second preliminary authentication unit 220 to finally authenticate the user. Specifically, the final authentication unit 230 determines whether the first-second similarity value and the first-second similarity value measured by the first-first similarity measuring unit and the first-second similarity measuring unit are equal to or greater than the first value, When the second similarity value measured by the similarity measuring unit 223 is equal to or greater than the second value, the user is finally authenticated.

As described above, according to the user authentication system 200 according to the second preferred embodiment of the present invention, the contact portion for the first fingerprint sensor F1 and the first electrode E1 separately provided, Two kinds of biometric information can be conveniently obtained by the contact part for three electrodes, and the user authentication can be performed.

100, 200: user authentication system
110, 210: first preliminary authentication unit 120, 220: second preliminary authentication unit
130, 230: final authentication unit 140, 240: first database
150, 250: second database
111, 211: sensor interface circuit 112, 212: first feature point extractor
113, 213: first similarity measuring device 121, 221: analog front end
122, 222: second feature point extractors 123, 223: second similarity-
F1: first fingerprint sensor F2: second fingerprint sensor
E1: first electrode E2: second electrode

Claims (8)

In a user authentication system,
A first preliminary authentication unit for performing user authentication based on fingerprint information of a user using at least one fingerprint sensor;
A second preliminary authentication unit for authenticating a user based on electrocardiographic information of the user using the first electrode and the second electrode; And
And a final authentication unit which finally authenticates the user using the authentication result of the first preliminary authentication unit and the authentication result of the second preliminary authentication unit. The method according to claim 1,
The user authentication system comprising:
Characterized in that the first fingerprint sensor and the first electrode are disposed such that at least three faces or four faces of the outer circumference of the first fingerprint sensor among at least one fingerprint sensor are surrounded by the first fingerprint sensor User authentication system. 3. The method of claim 2,
Wherein the first fingerprint sensor and the first electrode are connected to each other,
Wherein the wearable device is disposed at a noncontact portion of the wearable device when the wearable device is worn. The method of claim 3,
Wherein the second electrode comprises:
Wherein the wearable device is disposed at a human body contact portion when the wearable device is worn. The method according to claim 1,
Wherein the first preliminary authentication unit comprises:
A first feature point extractor for extracting fingerprint feature points using information obtained from the first fingerprint sensor; And
And a first similarity measuring unit for comparing the extracted fingerprint feature points extracted from the first feature point extractor with previously stored fingerprint feature points and measuring a first similarity degree. 6. The method of claim 5,
Wherein the second preliminary authentication unit comprises:
An analog front end for amplifying and converting the analog signal output from the first electrode and the second electrode into a digital signal;
A second feature point extractor for extracting ECG feature points using information obtained from the digital signal output from the analog front end; And
And a second degree-of-similarity measuring unit for measuring a second degree of similarity by comparing the electrocardiographic feature points extracted from the second feature point extractor with previously stored electrocardiographic feature points. The method according to claim 6,
Wherein the second feature point extractor comprises:
Wherein the controller determines whether the digital signal output from the analog front end is an inverted signal from the signal for extracting an ECG feature point and inverts the inverted signal to extract the ECG feature point. The method according to claim 6,
The final authentication unit,
Wherein when the first similarity value measured by the first similarity measuring device is equal to or greater than a first value and the second similarity value measured by the second similarity measuring device is equal to or greater than a second value, User authentication system.

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