Method of gathering biometric information

• US 6,038,334 A
• Filed: 02/21/1997
• Issued: 03/14/2000
• Est. Priority Date: 02/21/1997
• Status: Expired due to Term

• Current Assignee: Activcard Ireland, Limited (Assa Abloy AB)
• Original Assignee: DEW Engineering and Development Limited (Trelleborg AB)
• Inventors: Hamid, Laurence
• Primary Examiner(s): Au, Amelia
• Assistant Examiner(s): AHMED, SAMIR ANWAR
• Application Number:
  US08/804,267
• Time in Patent Office: 1,117 Days
• Field of Search: 382/115, 382/116, 382/124, 382/125, 382/127, 382/225, 340/825.31, 340/825.34
• US Class Current: 382/124
• CPC Class Codes: G06V 40/12 Fingerprints or palmprints
• CPC Class Codes: G07C 9/37 using biometric data, e.g. fingerprints, iris scans or voice recognition

Abstract

In the past, user authorization based on biometric information was conducted by correlating a single instance of biometric information against a template. By using this method, a percentage of the population is difficult to authenticate. Further, due to skin damage and injuries, sometimes biometric information is not suited to identification. A sore throat affecting voice information and scraped finger tips affecting fingerprint information are two examples of common problems with authorization in dependence upon biometric information. A method of authenticating a user in dependence upon biometric input information is disclosed. The method allows a user to select biometric information sources and a number of repetitions for each source in order to customize the process of biometric user authentication.

Claims

1. A method of registering biometric information of an individual comprising the steps of:

a) providing a biometric information sample from each of a plurality of different biometric sources of the same individual to at least one biometric input device in communication with a host processor;

b) associating each provided biometric information sample with a biometric source;

c) using the processor, registering each biometric information sample against a template associated with the associated biometric source;

d) determining a plurality of registration values in dependence upon the results of step (c), each registration value from the plurality of registration values relating to a different provided biometric information sample; and

,

e) when some of the determined registration values relate to security levels below a predetermined threshold value and a combination of the plurality of registration values relates to a security level above a same predetermined threshold, performing one of authorising and identifying the individual in dependence upon the plurality of determined registration values, wherein a single biometric information sample with a determined registration value below the predetermined threshold value when taken in isolation, if the individual were authorised or identified, would result in a security level below a predetermined minimum allowable security level.

2. A method of registering biometric information of an individual as defined in claim 1 further comprising the steps of:

the host processor determining biometric information sources for provision to the

biometric input means; and

,

prompting the individual to provide each biometric information sample.

3. A method of registering biometric information of an individual as defined in claim 2 wherein the biometric information sources are determined at random.

4. A method of registering biometric information of an individual as defined in claim 1 wherein the biometric information sources comprise at least two different fingertips.

6. A method of registering biometric information of an individual as defined in claim 1 wherein the host processor associates the biometric information sources and the biometric information samples.

7. A method of registering biometric information of an individual as defined in claim 1 wherein threshold is a probability of false acceptance.

8. A method of registering biometric information of an individual as defined in claim 1 wherein the individual associates the biometric information sources and the biometric information samples.

9. A method of registering biometric information of an individual as defined in claim 8 further comprising the step of:

the individual determining biometric information sources for provision to the biometric input means.

10. A method of registering biometric information of an individual as defined in claim 1 wherein the biometric information sources of an individual forms further data for use in determining the security level of the combination of the plurality of registration values.

11. A method of registering biometric information of an individual as defined in claim 1 further comprising the step of:

the individual determining biometric information sources for provision to the biometric input means.

12. A method of registering biometric information of an individual as defined in claim 1 wherein all registration values are below the predetermined threshold and the combined registration values are above a same predetermined threshold.

13. A method of registering biometric information of an individual as defined in claim 1 further comprising the step of:

using the processor, analysing the determined biometric information sources to determine a likelihood of false acceptance; and

,

when the likelihood of false acceptance is above a predetermined level, prompting for further biometric information from other biometric information sources.

5. A system for registering biometric information of an individual comprising:

a) means for providing a biometric information sample from each of a plurality of biometric sources of the same individual to at least one biometric input device in communication with a host processor;

b) means for associating each biometric information sample provided with a biometric source of the individual;

c) means for using the processor, registering each biometric information sample against a template associated with the associated biometric source and a same individual;

d) means for determining registration values in dependence upon the results of step (c); and

,

e) means for when some of the determined registration values relate to security levels below a predetermined threshold value and a combination of the plurality of registration values relates to a security level above a same predetermined threshold, performing one of authorising and identifying the individual in dependence upon the plurality of determined registration values, wherein a single biometric information sample with a determined registration value below the predetermined threshold value when taken in isolation, if the individual were authorised or identified, would result in a security level below a predetermined minimum allowable security level.

14. A method of registering biometric information of an individual in dependence upon stored templates of biometric information comprising the steps of:

a) providing a set of parameters comprising a set of biometric information sources to a host processor;

b) in dependence upon the set of biometric information sources, providing biometric information samples from a same individual from at least some of the sources to at least a biometric input device in communication with the host processor;

c) using the host processor, registering the biometric information samples against some of the templates associated with a same individual to produce a set of registration values;

d) when some of the determined registration values relate to security levels below a predetermined threshold value and a combination of the plurality of registration values relates to a security level above a same predetermined threshold, determining if a point in a multidimensional space and having coordinates corresponding substantially to the registration values falls within a multidimensional range determined in dependence upon a predetermined false acceptance rate; and

,

e) identifying the individual when the point falls within the multidimensional range corresponding to the acceptable false acceptance rate.

15. A method of registering biometric information of an individual in dependence upon stored templates of biometric information as defined in claim 14 wherein the set of parameters comprises a user identification corresponding to the individual.

16. A method of registering biometric information of an individual in dependence upon stored templates of biometric information as defined in claim 14 wherein the set of parameters comprises a parameter associated with the acceptable false acceptance rate.