The present content using system is composed of a content importing apparatus and at least one content using apparatus. The content importing apparatus includes a content ID generating unit that generates a content ID and a content key information encryption converting unit that converts the encryption...http://www.google.fr/patents/US20030190044?utm_source=gb-gplus-shareBrevet US20030190044 - Content using system
Numéro de demande: 10/404,084 Numéro de publication: US 2003/0190044 A1 Date de dépôt: 2 avr. 2003 Brevet délivré: US7194091 ( Date de délivrance 20 mars 2007)
