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:
Jan. 11, 2011
Filed:
Jan. 18, 2006
Junichi Furukawa, Osaka, JP;
Kazunori Yamaji, Osaka, JP;
Hisayoshi Zenke, Hyogo, JP;
Kazutoshi Yamaguchi, Osaka, JP;
Junichi Furukawa, Osaka, JP;
Kazunori Yamaji, Osaka, JP;
Hisayoshi Zenke, Hyogo, JP;
Kazutoshi Yamaguchi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A content copying device has a mutual authentication section that performs a mutual authentication with a copy source recording medium and a copy destination recording medium respectively and generates a first medium unique key and a second medium unique key, a content key decrypting section that reads an encrypted content key from the copy source recording medium, and decrypts the encrypted content key using information based on the first medium unique key, a content key encrypting section that encrypts the decrypted content key using information based on the second medium unique key and writes the encrypted content key onto the copy destination recording medium, and a content copying section that reads an encrypted content from the copy source recording medium and writes the content onto the copy destination recording medium without performing decryption.