Provided are a personal authentication device having high confidentiality using brainwaves, a personal authentication method, and a system and program for the same. An authentication device using brainwaves, the device provided with an electroencephalograph, and a processing unit for calculating, for brainwaves corresponding to a plurality of stimulation events obtained by the electroencephalograph, a discrimination score through use of a discrimination model for estimating brain information for each authentication candidate stored in advance, and specifying and authenticating an authentication candidate providing a model on the basis of comparison of discrimination scores between discrimination models. Specification of an authentication candidate based on a discrimination score in the processing unit is based, for example, on one or both of the discrimination score and a decoding precision calculated from the discrimination score.
AUTHENTICATION DEVICE USING BRAINWAVES, AUTHENTICATION METHOD, AUTHENTICATION SYSTEM, AND PROGRAM