The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2022
Filed:
May. 28, 2020
Irdeto B.v., Hoofddorp, NL;
Petrus Lambertus Adrianus Roelse, Hoofddorp, NL;
Shufei He, Hoofddorp, NL;
Irdeto B.V., Hoofddorp, NL;
Abstract
A method of performing biometric authentication for a first user, the method comprising: performing one or more first tests, wherein for each first test, performing said first test comprises: obtaining a respective first input for said first test based on one or more biometric characteristics of the first user; determining that the first user is not a predetermined user when a respective first log-likelihood ratio for a first likelihood and a second likelihood does not exceed a respective first threshold for said first test, wherein the first likelihood is a likelihood of obtaining the respective first input based on a first model in which input is obtained from the predetermined user, and wherein the second likelihood is a likelihood of obtaining the respective first input based on a second model in which input is obtained from one or more users other than the predetermined user; determining that the first user is the predetermined user when the respective first log-likelihood ratio exceeds a respective second threshold for said first test, the respective second threshold greater than the respective first threshold; and when the respective first log-likelihood ratio exceeds the respective first threshold and the respective first log-likelihood ratio does not exceed the respective second threshold, either (a) determining to perform a further first test when a number of times that the first test has been performed is less than a predetermined maximum number of times or (b) determining to perform a second test when the number of times that the first test has been performed equals the predetermined maximum number of times; wherein performing the second test comprises: obtaining a second input for the second test based on the one or more biometric characteristics of the first user; and determining that the first user is the predetermined user when a second log-likelihood ratio for a third likelihood and a fourth likelihood exceeds a third threshold, wherein the third likelihood is a likelihood of receiving the respective second input based on the first model, and wherein the fourth likelihood is a likelihood of receiving the second input based on the second model; determining that the first user is not the predetermined user when the second log-likelihood ratio does not exceed the third threshold.