BIOMETRIC AUTHENTICATION APPARATUS AND METHOD

• US 20120326841A1
• Filed: 08/31/2012
• Published: 12/27/2012
• Est. Priority Date: 03/08/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: AOKI, Takahiro
• Granted Patent: US 9,013,271 B2
• Time in Patent Office: Days
• US Class Current: 340/5.82
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/50 Maintenance of biometric data or enrolment thereof
• CPC Class Codes: G06V 40/67 by interactive indications to the user
• CPC Class Codes: H04L 9/3231 Biological data, e.g. fingerprint, voice or retina network architectures or network communication protocols for supporting authentication of entities using biometrical features in a packet data network H04L63/0861

Abstract

A biometric authentication apparatus is provided, the apparatus including: a comparator that performs authentication of the user by comparing biological information read from a user with registered biological information registered in a storage in advance; a high accuracy comparator that compares the biological information with the registered biological information with a higher accuracy instead of comparison using the comparator when the user is not authenticated by the comparator; and a comparison result storage that records a comparison result obtained by the high accuracy comparator in the storage.

Claims

1. A biometric authentication apparatus comprising:

a comparator that performs authentication of the user by comparing biological information read from a user with registered biological information registered in a storage in advance;

a high accuracy comparator that compares the biological information with the registered biological information with a higher accuracy instead of comparison using the comparator when the user is not authenticated by the comparator; and

a comparison result storage that records a comparison result obtained by the high accuracy comparator in the storage.

2. The biometric authentication apparatus according to claim 1, wherein

the high accuracy comparator compares the biological information and the registered biological information by performing wide area comparison that is a comparison for an increased search area beyond that in the comparison by the comparator.

3. The biometric authentication apparatus according to claim 2, wherein

the high accuracy comparator further divides an area used in the comparison by the comparator into a plurality of parts, and compares the biological information and the registered biological information by processing a partial comparison to perform comparison for each of the plurality of parts.

4. The biometric authentication apparatus according to claim 3, wherein

the high accuracy comparator calculates and stores a vector in the storage based on a degree of similarity for each of the plurality of parts in the partial comparison.

5. The biometric authentication apparatus according to claim 2, wherein

the high accuracy comparator records a search position at which a degree of similarity in the wide area comparison is largest in the storage.

6. The biometric authentication apparatus according to claim 2, wherein

the high accuracy comparator excludes, in performing the wide area comparison, an area for which comparison has been performed by the comparator.

7. The biometric authentication apparatus according to claim 2, wherein

the comparator records, in performing the comparison, a search position of the biological information at which a degree of similarity between the biological information and the registered biological information is largest, in the storage;

and

the high accuracy comparator performs the wide area comparison giving a higher priority to an area closer to the search position recorded in the storage by the comparator.

8. A computer-readable recording medium having stored therein a program for causing a computer to execute a digital signature process comprising:

performing, by comparing biological information read from a user and registered biological information registered in a storage in advance, authentication of the user; and

when the user is not authenticated, comparing the biological information and the registered biological information with a higher accuracy than the comparison; and

recording a comparison result by the high accuracy comparison in the storage.

9. The computer-readable recording medium according to claim 8, wherein

in the high accuracy comparison, the biological information and the registered biological information are compared by wide area comparison that is a comparison for an increased search area beyond that in the comparison by the comparator.

10. The computer-readable recording medium according to claim 9, wherein

in the high accuracy comparison, further, an area used in the comparison by the comparator is divided into a plurality of parts, and the biological information and the registered biological information are compared by processing a partial comparison to perform comparison for each of the plurality of parts.

11. The computer-readable recording medium according to claim 10, wherein

in the high accuracy comparison, a vector based on a degree of similarity for each of the plurality of parts in the partial matching is calculated and stored in the storage.

12. A biometric authentication method, comprising:

performing authentication of the user by comparing biological information read from a user with registered biological information registered in a storage in advance using a comparator;

comparing the biological information with the registered biological information with a higher accuracy instead of comparison using the comparator when the user is not authenticated; and

recording a comparison result obtained by the high accuracy comparator in the storage.

13. The biometric authentication method according to claim 12, wherein

in the high accuracy comparison, the biological information and the registered biological information are compared by wide area comparison that is a comparison for an increased search area beyond that in the comparison by the comparator.

14. The biometric authentication method according to claim 13, wherein

in the high accuracy comparison, further, an area used in the comparison by the comparator is divided into a plurality of parts, and the biological information and the registered biological information are compared by processing a partial comparison to perform comparison for each of the plurality of parts.