DOMAIN PARTICIPATION METHOD, ATTRIBUTE CERTIFICATE SELECTION METHOD, COMMUNICATION TERMINAL, IC CARD, CE DEVICE, ATTRIBUTE CERTIFICATE ISSUING STATION, AND CONTENT SERVER

摘要

Provided is a domain participation method capable of acquiring a content by a secure method by using one CE device in a plurality of user environments. The domain participation method includes: a domain participation report step for reporting a domain participation to an attribute certificate issuing station (500) which issues a domain participation permission certificate according to a public key certificate of a CE device (400) as a domain representative, an IC card (300) containing the attribute certificate, and an attribute certificate of a communication terminal (200) as a domain participant; and a domain participation permission attribute certificate issuing step in which the attribute certificate issuing station (500) receives the domain participation report from the communication terminal (200), correlates the public key certificate of the CE device (400) with the attribute certificate of the communication terminal (200), and issues a domain participation permission attribute certificate in which the public key certificate of the CE device (400) is correlated with the attribute certificate of the communication terminal (200), to the communication terminal (200).