Abstract: Various apparatus, methods and systems for insertion of advertisements in various environments are provided. Apparatus, methods and systems for profiling users, registering advertisement impressions and generating feedback in response to advertisement viewing are also disclosed.

Abstract: Various apparatus, methods and systems for insertion of advertisements in various environments are provided. Apparatus, methods and systems for profiling users, registering advertisement impressions and generating feedback in response to advertisement viewing are also disclosed.

Abstract: Advertisement information appropriated beforehand is inserted into contents such as a game downloaded by a user at the point that the user activates the contents, based on advertisement-insertable information within the game data or the like, and subsequently advertisement information is displayed at corresponding areas while the contents are running, thereby realizing an advertisement system capable of dealing with network infrastructures.

Abstract: Various apparatus, methods and systems for insertion of advertisements in various environments are provided. Apparatus, methods and systems for profiling users, registering advertisement impressions and generating feedback in response to advertisement viewing are also disclosed.

Abstract: A user purchases a prepaid card (or optical disc 9), entering to a client terminal apparatus an SC-ID, which is a unique identification number assigned thereto. The client terminal sends to a network-based master server apparatus a unique client ID of the client terminal apparatus and a unique MC-ID of a memory card together with the SC-ID. The master server apparatus stores as a combination of the MC-ID and client ID a prepaid amount that corresponds to the SC-ID. Then, in order to provide services, identifies from the MC-ID and client ID the user that receives the services, carrying out a charge process on an amount that is in accordance with the to-be-provided services in response to that user's prepaid amount, which allows for provision of services. Accordingly, shifting to a secure device the paying function of a medium that is used for paying enables network-based electronic settlement.

Abstract: A high-security content providing system is disclosed. The content providing system includes a content provider connected to a large number of user terminals via a network. A content including user information specific to a particular user and an electronic watermark embedded therein is transmitted from the content provider to a user terminal. When the content is executed on the user terminal, the user information and the electronic watermark are checked by the user terminal or by the content provider. The content is allowed to be executed only when the checking indicates that the content is an authorized content.

Abstract: Advertisement information appropriated beforehand is inserted into contents such as a game downloaded by a user at the point that the user activates the contents, based on advertisement-insertable information within the game data or the like, and subsequently advertisement information is displayed at corresponding areas while the contents are running, thereby realizing an advertisement system capable of dealing with network infrastructures.