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:
Jun. 16, 2015
Filed:
Jan. 23, 2008
Applicant:
Fumiaki Tsukazaki, Osaka, JP;
Inventor:
Fumiaki Tsukazaki, Osaka, JP;
Assignee:
MegaChips Corporation, Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04L 9/28 (2006.01); H04K 1/06 (2006.01); G06F 21/72 (2013.01); H04L 9/08 (2006.01); H04L 9/14 (2006.01);
U.S. Cl.
CPC ...
G06F 21/72 (2013.01); H04L 9/0877 (2013.01); H04L 9/0894 (2013.01); H04L 9/14 (2013.01);
Abstract
Original data to be a source for an encryption key is read from a memory cell array and stored in a buffer region. An encryption key generation unit generates a plurality of encryption keys by variously modifying the original data read from the buffer region based on a predetermined generation rule. The encryption unit generates an encrypted command by encrypting commands individually with an encryption key different for each command, out of the plurality of encryption keys generated by the encryption key generation unit.