Method and system for preventing fraud in the biometric detection of persons

• US 7,027,617 B1
• Filed: 01/18/2000
• Issued: 04/11/2006
• Est. Priority Date: 01/19/1999
• Status: Expired due to Term

• Current Assignee: BioID AG
• Original Assignee: HumanScan GmbH
• Inventors: Frischholz, Robert
• Primary Examiner(s): Werner, Brian
• Assistant Examiner(s): LAVIN, CHRISTOPHER L
• Application Number:
  US09/889,600
• Time in Patent Office: 2,275 Days
• Field of Search: 382/107, 382115-127, 382/103, 382/324, 340/5.52, 340/5.53, 340 581- 584
• US Class Current: 382/107
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: G06V 40/16 Human faces, e.g. facial parts, sketches or expressions
• CPC Class Codes: G06V 40/40 Spoof detection, e.g. liveness detection
• CPC Class Codes: G07C 9/37 using biometric data, e.g. fingerprints, iris scans or voice recognition

Abstract

The invention relates to a method and system of securing forgery in biometrical identification of persons, wherein at least one biological characteristic of a person is recorded and transformed into personal data, and the personal data are compared with reference data in order to identify the person. The person is caused to carry out a controllable motion before, after, or during the identification and this motion is recorded. In particular, objects are displayed successively at different positions on screen, and it is verified whether the person'"'"'s line of sight follows the object so as to find out whether indeed a living person rather than a copy is located in front of the identification system.

Claims

1. A method of securing forgery in biometrical identification of persons which includes detecting at least one biological characteristic of a person and transforming it into personal data in order to recognize the person wherein before, during or after the detecting at least one biological characteristic, the person is caused to carry out a controllable motion, and a condition precedent to the biometrical identification is verification of the presence of the person based on said motion being detected, wherein said controllable motion is directing the person'"'"'s eyes to a randomly positioned target for each verification.

2. The method as claimed in claim 1, wherein a line of sight of the person is controlled and the position of the eyes is detected.

3. The method as claimed in claim 2, wherein at least one mark is preset at a random position on a monitor, and it is detected whether the person'"'"'s line of sight is directed to that mark.

4. The method as claimed in claim 1 wherein the person is caused to place a hand or parts thereof at a predeterminable position on a biometrical detector means, and that biometrical data of the hand or parts thereof at this position are detected.

5. The method as claimed in claim 1, wherein a first target direction is predetermined for the motion and it is checked whether a first motion follows the predetermined target direction, and at least one other target direction is predetermined which differs from the first target direction, and it is checked whether at least a second motion follows this other target direction, and the biological characteristic of the person is detected if at least the first and second motions follow the respective target directions.

6. The method as claimed in claim 5, wherein an alarm is given if the motions do not follow the target directions repeatedly in succession.

7. The method as claimed in claim 1, wherein an alarm is given if the motions do not follow the target directions repeatedly in succession.

8. The method as claimed in claim 1, wherein a facial picture is taken of the person and digitized, and the actual position of the eyes in the digitized image is detected and compared with a rated eye position, and the digitized facial image is compared with at least one digital facial reference image if the actual eye position largely corresponds with the rated eye position.

9. The method as claimed in claim 1, wherein the motion is detected before, after, or during the identification of the person.

10. A method of biometrical identification of persons comprising a method as claimed in claim 1, wherein the person'"'"'s data are compared with reference data.

11. A system of securing forgery in biometrical identification of persons, comprising a detector means for detecting at least one biological characteristic of a person and a processing means for transforming the characteristic detected into personal data, comprising:

a directing means for inducing a certain motion of the person'"'"'s eyes in response to a randomly positioned target, the motion being detected by the detector means, wherein said processing means verifies whether the person is actually present independently of the detection result.

12. The system as claimed in claim 11, wherein the directing means comprises a monitor on which a mark is adapted to be displayed at random positions in order to direct the person'"'"'s motion to that mark.

13. The system as claimed in claim 12, wherein the directing means controls the person'"'"'s line of sight, the detector means detects the eye position, and the processing means digitizes the eye position detected and compares it with the rated eye position.

14. The system as claimed in claim 11, wherein the directing means is part of the detector means.

15. A system for biometrical identification of persons, comprising a system as claimed in claim 11, wherein the processing means compares the person'"'"'s data with reference data.

16. In a system of identification of a person by comparison of a stored prerecorded biometric characteristic of the person in digitized form and an observed biometric characteristic of the person in digitized form, the method of preventing the fraudulent substitution of prerecorded biometric characteristics for the observed biometric characteristics, comprising:

before, after or during obtaining the observed biometric characteristic for use in the comparison, causing movement of the observed biometric characteristic by directing the person'"'"'s eyes to a randomly positioned target;

verifying the presence of the person whose biometric characteristics are being observed based on the eye movement; and

performing the comparison using the obtained biometric characteristic.