The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Feb. 20, 2002
Muneki Shimada, Tokyo, JP;
Shinichi Okamoto, Tokyo, JP;
Masaharu Yoshimori, Tokyo, JP;
Tsutomu Inui, Chiba, JP;
Keiso Shimakawa, Kanagawa, JP;
Toyoshi Okada, Tokyo, JP;
Makoto Kubo, Tokyo, JP;
Mitsuhiro Nakamura, Tokyo, JP;
Muneki Shimada, Tokyo, JP;
Shinichi Okamoto, Tokyo, JP;
Masaharu Yoshimori, Tokyo, JP;
Tsutomu Inui, Chiba, JP;
Keiso Shimakawa, Kanagawa, JP;
Toyoshi Okada, Tokyo, JP;
Makoto Kubo, Tokyo, JP;
Mitsuhiro Nakamura, Tokyo, JP;
Sony Computer Entertainment Inc., Tokyo, JP;
Abstract
An ID (MID) is attached to each individual optical disk, and content is encrypted with a Content-Key and registered. In addition, a system server device maintains a Client ID of a client terminal device, HDD-ID of a hard disk drive (HDD), and MC-ID of a memory card respectively held as user entry information. When the user wants to copy the content, together with the optical disk MID, the MC-ID is sent to the system server side. The system server device identifies the user by referencing the MC-ID in the user entry information, and returns a Content-Key, which is used when encoding content. On the user side, content stored in the optical disk is decrypted using the returned Content-Key and copied to the HDD. Accordingly, copying of content is allowed only for an authorized user who is the lawful owner of the storage media.