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:
Nov. 03, 2015
Filed:
Sep. 06, 2006
Shinichi Kurihara, Yokohama, JP;
Shinichi Kurihara, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
A content encryption device generates encrypted content and an encrypted content copying device copies the encrypted content on an information storage medium. The storage medium is sold at a charge or distributed at no charge. A user gets the storage medium to connect the storage medium to a user terminal device or set the storage medium in a user terminal device, accesses to a content key distribution device to present a part or a whole of medium information of the storage medium to the distribution device. The distribution device grasps the whole of the medium information of the copied medium together with copied content and makes a content key encryption device issue an encrypted content key on the basis of user presentation information and distributes it to the terminal device.