In the method with the foam/home network which includes the reception method of the session key with foam/home network and

摘要

A) in the degree which modification occurs in the member of foam/home network, it receives the session version which displays the formation order of the session key and the session key in the method with foam/home network of receiving the session key from the foam/home server, the step which decides the session key which is necessary for the playback of the contents step and b which at the same time are retained) encoding session version and the description above of the session version which is extracted from step and c) license which receive the license which is necessary for the playback of the specified contents on the basis of the session version which is retained and, it includes. According to this invention, the foam/home server, in the degree which modification of the member occurs, transmits the session key and session version to the user equipment, the user equipment e.g., transmission of the contents between the user equipment is done freely by deciding the session key making use of session version, can do various domain managements.