Patent ID: 8656474

Claim:
A biometric authentication device comprising: a biometric information obtain portion that obtains biometric information of a user; a biometric condition determine portion that determines good and bad of biometric condition of the user according to one or more biometric information of the user obtained by the biometric information obtain portion; a biometric matching portion that performs a matching between registered biometric information registered in advance and the one or more biometric information when the biometric condition is determined to be good by the biometric condition determine portion; an alternate authentication portion that performs an alternate authentication based on information that is different from the biometric information; an alternate authentication control portion that makes the alternate authentication of the alternate authentication portion valid when the biometric condition is determined to be bad by the biometric condition determine portion; and an informing portion that informs an administrator of validation of the alternate authentication when the alternate authentication is made to be valid and informs the administrator of invalidation of the alternate authentication when the alternate authentication is made to be invalid.