Content distribution system, content distribution method, information processing apparatus, and program providing medium

No: 7484246
No. de la demande: 09943773
Date d'archivage: 2001-08-30
Date d'emission: 2009-01-27
Genre: B2
Pretentions: 13
Feuilles de dessin: 89
Resume: A content distribution is performed by a secure container including a content encrypted by a content key and container information set for a content transaction. The container information includes a person identification certificate identifiers list. Usage control status information including the list is generated and stored in a device during a secondary distribution among user devices after a primary distribution of the content. In the distribution among the user devices, identifying an identification certificate in reference to the list and performing a person authentication based on the identification certificate allows each of the user devices to use the transmitted content, when the authentication is affirmative.
Inventeurs:
	Matsuyama Shinako  (1)
	Ishibashi Yoshihito  (3)
	Futamura Ichiro  (1)
	Kon Masashi  (2)
	Watanabe Hideaki  (2)
Examinateur principal: Lipman Jacob
Agents:
	Sonnenschein Nath & Rosenthal LLP (ORG)  (931)
Cessionnaires:
	Sony Corporation (ORG)  (12464)
Domaine de recherches:
	No:201 - Computer network
References:
	5708709 - System and method for managing try-and-buy usage of application programs
	6009401 - Relicensing of electronically purchased software
	6035403 - Biometric based method for software distribution