Augmented handwritten signature authentication method and electronic device supporting same

An electronic device supporting augmented handwritten signature authentication, the electronic device comprising:

• a data acquisition unit configured to obtain a primary touch input corresponding to a primary handwritten signature input of a user, and obtain, after a specified time period elapses, a secondary mark input;
• and
• a signature authentication unit configured to obtain primary touch position data corresponding to the primary touch input, and the secondary mark input, and perform user authentication by comparing the primary touch position data corresponding to the primary touch input and secondary touch position data related to at least part of the secondary mark input with prestored primary touch registration data and secondary touch registration data, respectively,
• wherein the signature authentication unit is configured to
• perform comparison to determine whether the secondary touch position data overlaps with part of the primary touch position data, and
• determine the secondary touch position data as valid data when at least part of the secondary touch position data overlaps with the at least part of the primary touch position data, or determine the secondary touch position data as invalid data when the at least part of the secondary touch position data does not overlap with the at least part of the primary touch position data.