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:
Aug. 29, 2006
Filed:
Sep. 04, 2001
Toru Owada, Yokohama, JP;
Jun Kitahara, Yokohama, JP;
Takeshi Asahi, Fujisawa, JP;
Takayuki Tamura, Kodaira, JP;
Nagamasa Mizushima, Fujisawa, JP;
Ikuya Kawasaki, Kodaira, JP;
Takashi Totsuka, Machida, JP;
Toru Owada, Yokohama, JP;
Jun Kitahara, Yokohama, JP;
Takeshi Asahi, Fujisawa, JP;
Takayuki Tamura, Kodaira, JP;
Nagamasa Mizushima, Fujisawa, JP;
Ikuya Kawasaki, Kodaira, JP;
Takashi Totsuka, Machida, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage medium includes a storage device for storing information, information required for encryption and encrypted information, and an I/F device for inputting and outputting information, information required for coding and store encrypted information in a storage device or from an external apparatus other than the storage device, and an encoding device for coding of information and decoding of encoded information. When outputting information stored inside the storage device, information is encoded using encryption key information, and along with obtaining the encoded information and obtaining the encoded encryption key information by using another encryption key. Both the encoded information and encoded encryption key information are output so that decoding the information without the storage medium is impossible.