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:
Jul. 20, 2010
Filed:
Mar. 23, 2005
Muneki Shimada, Tokyo, JP;
Shiho Moriai, Kanagawa, JP;
Kazuhiro Kanee, Chiba, JP;
Sony Computer Entertainment Inc., Tokyo, JP;
Abstract
To provide a recording medium on which an entire piece of decryption information that is required to be highly secure is recorded while being kept secure even when it is larger in data size than the storage capacity of an area originally intended for recording it. A recording medium in which encrypted content that has been encrypted and decryption information for the decryption of the encrypted content are recorded in two areas of different security levels. Decryption information B which is a portion of the decryption information is recorded in an area L of a relatively higher security level. The encrypted content and decryption information C which is the remainder of the decryption information that has been encrypted are recorded in an area D of a relatively lower security level. The decryption information B recorded in the area L includes information indicating the location where the decryption information C is recorded and information for the decryption of the remainder.