A system in an environment in which WSD is realized by employing SSL includes an authentication server that stores a certificate group which permits printer creation and printing to avoid a risk of spoofing. The system uses a printer having a certificate issued by an official certificate authority. In such a case, if verification on whether the certificate of the printer is included in the certificate group of the authentication server is performed for all printers, there may be a printer which becomes unable to print, or in which the time for performing the verification becomes a waste, depending on the printer. A printer type is thus set when creating the printer, and if the printer has a certificate issued by the official certificate authority, a printer server performs certificate authority (CA) verification with respect to the certificate.