Electronic device

Disclosed is an electronic device including: an input unit including buttons; a plurality of sensors; and a controller configured to generate at least one authentication information based on at least some of the plurality of sensors, calculate a final security level score based on a security level score corresponding to the at least one authentication information, and determine whether a target service or a target external device is accessible, depending on the final security level score, wherein the security level score is set differently based on a type of the at least one authentication information. Accordingly, it is possible to easily access the target service or the target external device through multi-factor authentication.