Liveness detection method and device, and identity authentication method and device

Patent metadata

Field	Value
Publication number	US-2016366129-A1
Application number	US-201615176515-A
Country	US
Kind code	A1
Filing date	Jun 8, 2016
Priority date	Jun 10, 2015
Publication date	Dec 15, 2016
Grant date	—

Abstract

Liveness detection and an identity authentication is included in the disclosure. A user's biological characteristic information is collected and displayed at an initial position on a screen of a computing device. A target position is determined using the initial position, and the target position is displayed on the screen. The user is prompted to move the user's biological characteristic information to cause the displayed biological characteristic to move from the initial position on the screen to the target position on the screen. The user's movement is detected and the display position of the displayed biological characteristic information is determined using the detected user's movement; a judgment is made whether the user is a living being using a relationship between the determined display position and the target position. The biological characteristic information of a living being can be verified, e.g., when the user logs in, thereby improving security.

First claim

1 . A method comprising:
collecting, by a computing device, biological characteristic information of a user; displaying, by the computing device, the collected biological characteristic information at an initial position on a screen of the computing device; determining, by the computing device, a target position using the initial position, and displaying the target position on the screen; prompting, by the computing device, the user to move the user's biological characteristic information to cause the displayed biological characteristic to move from the initial position on the screen to the target position on the screen; detecting, by the computing device, the user's biological characteristic information movement, and determining the display position of the displayed biological characteristic information using the detected user's movement; and judging, by the computing device, whether the user is a living being using a relationship between the determined display position and the target position.

2 . The method of claim 1 , displaying the collected biological characteristic information at an initial position on a screen of the computing device comprising:
determining, by the computing device, a key region of the collected biological characteristic information of the user; obtaining, by the computing device and using collected biological characteristic information within the key region, an initial gesture of the collected biological characteristic information; and performing, by the computing device, a coordinate mapping using the initial gesture, and mapping the collected biological characteristic information to the initial position on the screen of the computing device.

3 . The method of claim 2 , performing coordinate mapping using the initial gesture and mapping the collected biological characteristic information to the initial position on the screen of the computing device comprising:
acquiring, by the computing device, a mapping relationship between coordinates of a first coordinate system and coordinates of a second coordinate system, the first coordinate system for use with the biological characteristic information of the user, and the second coordinate system for use with the computing device's screen; determining coordinates of the initial position corresponding to the initial gesture using the mapping relationship; and mapping the at least a portion of the collected biological characteristic information to the initial position using the coordinates of the initial position.

4 . The method of claim 1 , determining a target position using the initial position further comprising:
randomly generating, by the computing device, a candidate target position; judging, by the computing device, whether the candidate target position and the initial position satisfy a predetermined condition; and when the predetermined condition is satisfied, using the candidate target position as the target position.

5 . The method of claim 4 , judging whether the candidate target position and the initial position satisfy a predetermined condition comprising:
calculating, by the computing device, a distance between the candidate target position and the initial position; judging, by the computing device, whether the distance is smaller than a first predetermined value; if the distance is smaller than the first predetermined value, re-generating, by the computing device, a candidate target position until the distance is greater than or equal to the first predetermined value; and when the distance is greater than or equal to the first predetermined value, judging, by the computing device, that the candidate target position and the initial position satisfy the predetermined condition.

6 . The method of claim 1 , judging whether the user is a living being using a relationship between the display position and the target position comprising:
when a distance between the display position and the target position is smaller than a second predetermined value, judging that the user successfully moved the displayed biological characteristic; if a number of times that the user is judged to have successfully moved the displayed biological characteristic reaches a predetermined number of times, judging that the user is a living being.

7 . The method of claim 1 , determining the display position of the displayed biological characteristic information using the detected user's movement comprising:
acquiring gesture information of the biological characteristic information's movement by the user in response to detecting the user's movement, the gesture information being in a first coordinate system; using a pre-established mapping relationship between coordinates within the first coordinate system and coordinates within a second coordinate system to calculate coordinates within the second coordinate system corresponding to the gesture information in the first coordinate system; and determining the display position on the screen of the displayed biological characteristic information using the calculated coordinates in the second coordinate system, the first coordinate system is a coordinate system for use with the user's biological characteristic information, and the second coordinate system is a coordinate system for use with the screen.

8 . The method of claim 1 , the user's biological characteristic information is face information.

9 . A method comprising:
upon receiving an identity authentication instruction of a user, a computing device collecting biological characteristic information of the user; judging, by the computing device, whether the user is a living being according to the collected biological characteristic information; if the user is judged to be a living being, the computing device sending the collected biological characteristic information of the user to an authentication server; receiving, by the computing device and from the authentication server, an identity authentication result of a comparison of the collected biological characteristic information with prestored biological characteristic information corresponding to the user; the judging, by the computing device, whether the user is a living being comprising:
displaying at least a portion of the collected biological characteristic information at an initial position on a screen of the computing device;
determining a target position using the initial position, and displaying the target position on the screen;
prompting the user to move the user's biological characteristic information to cause the displayed biological characteristic to move from the initial position on the screen to the target position on the screen;
detecting the user's biological characteristic information movement, and determining the display position of the displayed biological characteristic information using the detected user's movement; and
judging whether the user is a living being using a relationship between the determined display position and the target position.

10 . The method of claim 9 , the sending the collected biological characteristic information of the user to an authentication server comprising:
determining, by the computing device, an image frame quality of the collected biological characteristic information of the user; selecting, by the computing device and from the collected biological characteristic information of the user, a number of image frames of the collected biological characteristic information ranked at a top in terms of image frame quality, the number being a predetermined positive integer; and sending, by the computing device, the selected number of image frames of the collected biological characteristic information ranked at the top in

Assignees

• Alibaba Group Holding Ltd

Inventors

• Chen Jidong
• Li Liang

Classifications

• H04L63/0861 Primary

  using biometrical features, e.g. fingerprint, retina-scan (cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231) · CPC title

• G06F21/32 Primary

  using biometric data, e.g. fingerprints, iris scans or voiceprints · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G06K9/00114

  Physics · mapped topic

• G06K9/00315

  Physics · mapped topic