US Patent 9710633 Method and apparatus for authenticating user

The present disclosure provides a method performed by a user authentication apparatus for authenticating a user of an information processing device. The method includes: visually outputting a code image including predetermined information to allow the information processing device to capture the code image; determining whether an authentication request including the code image and authentication identification information is obtained from the information processing device; and performing a user authentication process based on the authentication identification information after the authentication request is obtained.