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. 15, 2011
Filed:
Nov. 14, 2006
Applicants:
Akihiro Kasahara, Sambu-gun, JP;
Akira Miura, Sagamihara, JP;
Hiroshi Suu, Chigasaki, JP;
Kazunori Nakano, Tokyo, JP;
Shigeru Ishida, Kokubunji, JP;
Inventors:
Akihiro Kasahara, Sambu-gun, JP;
Akira Miura, Sagamihara, JP;
Hiroshi Suu, Chigasaki, JP;
Kazunori Nakano, Tokyo, JP;
Shigeru Ishida, Kokubunji, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
A user terminal converts stored contents of an SD card to contain second encrypted content key data equivalent to an encrypted title key of SD Audio, and encrypted content equivalent to encrypted content of the SD Audio. Accordingly, compatibility can be realized between an encryption dual key system as a first encryption system and an encryption (single) key system as a second encryption system.