VEHICLE THEFT DETERMINATION APPARATUS

[Problem to be Solved] To realize both convenience and crime preventive performance in authentication of a user of a vehicle.[Solution] A vehicle theft determination apparatus 1 includes: a biological information acquisition unit 10 that acquires biological information of a user of a vehicle; a determination unit 30 that determines that the user is an authorized person in a case in which a first biological information similarity between acquired first biological information of the user and biological information registered in advance is equal to or greater than a first threshold value; and a driving feature acquisition unit 20 that acquires driving features of the user who drives the vehicle, the biological information acquisition unit acquiring second biological information of the user if a driving feature similarity between the driving features acquired by the driving feature acquisition unit and driving features registered in advance is equal to or greater than a predetermined value in a case in which the first biological information similarity is less than the first threshold value, the determination unit determining that the user is the authorized person in a case in which a second biological information similarity between the second biological information and biological information registered in advance is equal to or greater than a second threshold value that is less than the first threshold value.