Patent ID: 8489891
Filing Date: 2013-07-16
Classification: G06F,H04N

Abstract:
1. A method for limiting a service in a network system, the network system including a server that provides a service and one or more clients that are served, the method comprising: giving option designation permission information and a first key to the client with the option designation permission information associated with the first key, the option designation permission information indicating, among options of the service, an option that is allowed to be designated by the client or an option that is prohibited from being designated by the client; giving the server a second key corresponding to the first key of each of the clients; performing, by the client, processing of generating service content data within a range of options that are indicated in the option designation permission information of the client itself and can be designated, the service content data indicating a content of the service to be obtained from the server; performing, by the client, processing of encrypting the service content data thus generated using the first key of the client itself; performing, by the client, processing of sending the service content data thus encrypted to the server; performing, by the server, processing of decoding the service content data received from the client using the second key of the client; performing, by the server, processing for the service based on the service content data thus decoded; and wherein the second key is created by an apparatus external to the server before the second key is given to the server.