Patent ID: 7310525

Claim:
A network service system using a temporary user identifier, where information of a user using a plurality of services is shared by the plurality of services, comprising: a temporary user identifier update request transmitting side device which provides a first service to the user and can transmit an update request of a temporary user identifier shared within the network service system as information of the user; a temporary user identifier update request receiving side device which is connected to said temporary user identifier update request transmitting side device by a network and can receive the update request of a temporary user identifier that is transmitted from said temporary user identifier update request transmitting side device, for providing a second service cooperating with the first service to the user using updated temporary user identifier corresponding to the update request; and a user proxy device which is connected to said temporary user identifier update request transmitting side device and said temporary user identifier update request receiving side device by the network, and with which the user receives the first and the second services, wherein: said user proxy device generates temporary user identifiers using a random number corresponding to user identifiers of a user for services provided in said temporary user identifier update request transmitting side device and said temporary user identifier update request receiving side device, and it transmits to said temporary user identifier update request transmitting side device and said temporary user identifier update request receiving side device, an association registration request message including the generated temporary user identifier and notice information to the user; said notice information to the user includes a type of a communication means to communicate with said user proxy device and address information corresponding to the type; each of said temporary user identifier update request transmitting side device and said temporary user identifier update request receiving side device transmits an association reply message to a side of the user proxy device after setting the temporary user identifier, a valid time period of the temporary user identifier and the notice information to the user; and said address information is used to notify, by said communication means whose type is described in said notice information to the user, said user proxy device that an association is deleted when the association is deleted before the valid time period of the generated temporary user identifier expires.