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:
Mar. 30, 2010
Filed:
Dec. 21, 2005
Applicants:
Takeshi Nagase, Kawasaki, JP;
Shogo Shibazaki, Kawasaki, JP;
Shinkichi Gama, Kawasaki, JP;
Inventors:
Assignee:
Fujitsu Microelectronics Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An encryption/decryption processing unit performs encryption/decryption processing of data transmitted from a host system, and encryption/decryption processing of key data used for encryption/decryption of the data. A key data buffer temporarily stores encrypted key data. A key data buffer temporarily stores unencrypted key data. An external memory interface controls flash memory attached outside, and reads/writes encrypted key data stored in the key data buffer.