In a system of a communication network service, a content providing service apparatus has a storage for storing a plurality of pieces of protected contents, a transfer request accepting section for accepting a transfer request from a user for a particular piece of content, and a content transfer section...http://www.google.fr/patents/US20030033254?utm_source=gb-gplus-shareBrevet US20030033254 - Network system of distributing protected contents through secured carrier server
Network system of distributing protected contents through secured carrier server
