US 12,468,795 B2
Biometric authentication device, biometric authentication method, and computer readable medium
Shun Hinatsu, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Apr. 29, 2024, as Appl. No. 18/649,618.
Application 18/649,618 is a continuation of application No. PCT/JP2021/048268, filed on Dec. 24, 2021.
Prior Publication US 2024/0281511 A1, Aug. 22, 2024
Int. Cl. G06F 21/00 (2013.01); G06F 21/32 (2013.01)
CPC G06F 21/32 (2013.01) 11 Claims
OG exemplary drawing
 
1. A biometric authentication device comprising
processing circuitry configured
to measure biometric information,
to generate authentication information that differs depending on an individual living body from first biometric information being the measured biometric information, and to compare the authentication information with a first template being set in advance, to decide authentication acceptance or nonacceptance on a basis of the authentication information, using a method,
to decide about continuation acceptance or nonacceptance by a method different from the method employed in decision of the authentication acceptance or nonacceptance, the processing circuitry repeatedly making decisions about the continuation acceptance or nonacceptance of an authentication state, using second biometric information being the biometric information which is measured in the authentication state where authentication acceptance is decided,
to guarantee legitimacy of the biometric information on a basis of results of repeated decisions of the continuation acceptance or nonacceptance;
to compare the authentication information with the first template being set in advance, to decide the authentication acceptance or nonacceptance, and to set the authentication information as a second template if authentication acceptance is decided;
to generate continuation information from the second biometric information and to compare the continuation information with the second template, to decide the continuation acceptance or nonacceptance, and to update a continuation template with the continuation information if continuation acceptance is decided; and
at a certain timing, to compare the continuation information with the first template instead of the second template, to decide the continuation acceptance or nonacceptance.