Abstract: A certification apparatus stores personal information certified to a user to register the user. When a user presented password sent from a portable telephone coincides with a password stored as a part of the personal information and the user who is operating the portable telephone is specified to be the same person as the registered user, adult certification data certifying the user being an adult on the basis of the personal information is sent to the portable telephone. Consequently, it becomes possible to make a portable terminal acquire certification information certifying personal information, and to prevent unfair use of the certification information by a third party almost surely. Thereby, a certification system capable of preventing unfair use by the third party almost surely can be achieved.

Abstract: A certification apparatus stores personal information certified to a user to register the user. When a user presented password sent from a portable telephone coincides with a password stored as a part of the personal information and the user who is operating the portable telephone is specified to be the same person as the registered user, adult certification data certifying the user being an adult on the basis of the personal information is sent to the portable telephone. Consequently, it becomes possible to make a portable terminal acquire certification information certifying personal information, and to prevent unfair use of the certification information by a third party almost surely. Thereby, a certification system capable of preventing unfair use by the third party almost surely can be achieved.