Abstract: Provided is a content protection system, in which: a user terminal judges, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content, and makes, if it is judged that the user terminal does not have the usage right of the content, a request to a license management apparatus to acquire the usage right of the content; the license management apparatus generates, when the request to acquire the usage right is received from the user terminal, license information containing information on an expiration date that is set based on a timing when the request is received, and transmits the generated license information to the user terminal; and the user terminal judges that the user terminal has the usage right of the content until the expiration date indicated by the license information received from the license management apparatus arrives.

Abstract: A game recording medium records game files each containing at least a game program and configuration information with which to identify a data file usable by the game program. A recording medium records data files. An acquisition unit acquires the configuration information from the game recording medium, and a search unit searches the recording medium for the data file usable by the game program, based on the acquired configuration information. When a data file is detected, a copying unit copies the detected data file to the game recording medium.

Abstract: Provided is a content protection system, in which: a user terminal judges, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content, and makes, if it is judged that the user terminal does not have the usage right of the content, a request to a license management apparatus to acquire the usage right of the content; the license management apparatus generates, when the request to acquire the usage right is received from the user terminal, license information containing information on an expiration date that is set based on a timing when the request is received, and transmits the generated license information to the user terminal; and the user terminal judges that the user terminal has the usage right of the content until the expiration date indicated by the license information received from the license management apparatus arrives.

Abstract: A client terminal reads a device ID fixedly assigned to itself, and sends the device ID to an authentication server to make a request for authentication. The authentication server authenticates the device ID accepted from the client terminal. When succeeding in the authentication, the authentication server issues and sends a ticket to the client terminal. The client terminal receives the ticket, and then sends the ticket to a locator server to make a request for registration of an IP address. The locator server verifies the correctness of the accepted ticket. When the correctness is confirmed, the locator server registers an ID and the IP address of the client terminal in a manner that they are associated with each other, and replies the completion of the registration.

Abstract: A client terminal reads a device ID fixedly assigned to itself, and sends the device ID to an authentication server to make a request for authentication. The authentication server authenticates the device ID accepted from the client terminal. When succeeding in the authentication, the authentication server issues and sends a ticket to the client terminal. The client terminal receives the ticket, and then sends the ticket to a locator server to make a request for registration of an IP address. The locator server verifies the correctness of the accepted ticket. When the correctness is confirmed, the locator server registers an ID and the IP address of the client terminal in a manner that they are associated with each other, and replies the completion of the registration.