Fingerprint Recognition System

• US 20070237368A1
• Filed: 06/12/2007
• Published: 10/11/2007
• Est. Priority Date: 04/21/1997
• Status: Active Grant

• Current Assignee: Digital Persona Inc (Assa Abloy AB)
• Original Assignee: Digital Persona Inc (Assa Abloy AB)
• Inventors: Bjorn, Vance, Belongie, Serge
• Granted Patent: US 7,519,204 B2
• Time in Patent Office: Days
• US Class Current: 382/124
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 21/33 using certificates
• CPC Class Codes: G06F 21/34 involving the use of external additional devices, e.g. dongles or smart cards
• CPC Class Codes: G06F 2211/008 Public Key, Asymmetric Key, Asymmetric Encryption
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/40145 Biometric identity checks
• CPC Class Codes: G06V 40/13 Sensors therefor
• CPC Class Codes: G06V 40/1347 Preprocessing; Feature extraction
• CPC Class Codes: G07C 9/37 using biometric data, e.g. fingerprints, iris scans or voice recognition
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system

Abstract

A method and apparatus for fingerprint recognition is provided. A fingerprint is detected on a sensor. The fingerprint is digitized. A digitized background is subtracted from the fingerprint, resulting in a difference print. The difference print is matched with a database of fingerprint templates.

Claims

1-3. -3. (canceled)

4. A method of recognizing a fingerprint comprising:

detecting the fingerprint on a sensor;

receiving a nonce from a host system;

decrypting the nonce using a key;

sending the fingerprint to the host system;

decrypting the fingerprint and identifying the fingerprint;

providing a user authentication based on the fingerprint, after the fingerprint has been validated.

5. The method of claim 4, wherein the user authentication comprises a private key and public key of the user.

6. The method of claim 5, wherein the private key/public key of the user is the key used to encrypt the hash and the fingerprint.

7. The method of claim 4, wherein a first key is a PKI key pair of the sensor used to encrypt the fingerprint, and a second key is a PKI key pair of the user.