Abstract: An authentication system performing user-centered authentication may include: an authentication service component acting as an authentication procedure of an online service server; and a mobile authentication agent component acting as the authentication procedure of an assess terminal which accesses the online service server. Herein, the authentication service component may confirm a mobile authentication agent component corresponding to user information input from the access terminal as basic authentication information, transmit an authentication password value to each of the confirmed mobile authentication agent component and the online service server which the access terminal intends to access, and transmit an authentication success message to the online service server when a password verification value or an authentication agreement value corresponding to the authentication password value is received from the mobile authentication agent component.

Abstract: An authentication system performing user-centered authentication may include: an authentication service component acting as an authentication procedure of an online service server; and a mobile authentication agent component acting as the authentication procedure of an access terminal which accesses the online service server. Herein, the authentication service component may confirm a mobile authentication agent component corresponding to user information input from the access terminal as basic authentication information, transmit an authentication password value to each of the confirmed mobile authentication agent component and the online service server which the access terminal intends to access, and transmit an authentication success message to the online service server when a password verification value or an authentication agreement value corresponding to the authentication password value is received from the mobile authentication agent component.