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. 09, 2011
Filed:
Feb. 18, 2003
Applicants:
Kaoru Kakinuma, Kanagawa-ken, JP;
Kazuki Matsumoto, Kanagawa-ken, JP;
Inventors:
Kaoru Kakinuma, Kanagawa-ken, JP;
Kazuki Matsumoto, Kanagawa-ken, JP;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 17/30 (2006.01); G06F 12/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Data recorded in a recording medium is encrypted with an encryption/decryption key, and the encryption/decryption key is encrypted with an encryption-only key. The encrypted encryption/decryption key is embedded in encrypted data. A decryption-only key the encryption/decryption key is embedded in a program for reading. The data and the program for reading are recorded in the recording medium. The data cannot be read without the program for reading. The program for reading cannot be used for recording other data even if it is copied.