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:
Oct. 20, 2015
Filed:
May. 30, 2011
Applicants:
Yuji Nagai, Sagamihara, JP;
Hiroyuki Sakamoto, Ome, JP;
Hiroto Nakai, Yokohama, JP;
Seiji Miyata, Tokyo, JP;
Hideki Mimura, Yokohama, JP;
Inventors:
Yuji Nagai, Sagamihara, JP;
Hiroyuki Sakamoto, Ome, JP;
Hiroto Nakai, Yokohama, JP;
Seiji Miyata, Tokyo, JP;
Hideki Mimura, Yokohama, JP;
Assignee:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0833 (2013.01); H04L 9/0816 (2013.01); H04L 9/0822 (2013.01); H04L 9/0894 (2013.01); H04L 2209/60 (2013.01);
Abstract
A digital content protection method includes distributing, together with an encrypted content, an encrypted protected program key, a protected content key, and a protected code including an individual instruction code, at least some elements of which are designed according to a unique operation code specification for each content player or for each content player group.