SYSTEM AND METHOD FOR CERTIFYING CONTENT USERS USING CERTIFICATION AGENCY BY GENERATING SECRET KEY

摘要

PURPOSE: A system and a method for certifying content users using a certification agency are provided to make a CP(Contents Provider) confirm certification from the certification agency without unnecessarily exposing personal information by converting a temporary license issued from the certification agency with a secret key of the user and offering the converted temporary license to the CP. CONSTITUTION: The certification agency(400) generates/distributes a group public key, certifies the user(500) using the group public key, and stores the personal information of the certified user and the temporary license issued to the certified user. A user device converts the temporary license issued from the certification agency with the secret key of the user and executes the contents received from the CP(600) by providing the converted temporary license to the CP. The CP confirms the certification of the user providing the converted temporary license from the certification agency by using the group public key and provides the contents depending on the confirmation.