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:
Feb. 12, 2019
Filed:
Feb. 23, 2015
Applicant:
Sony Corporation, Tokyo, JP;
Inventors:
Kyoji Shibutani, Tokyo, JP;
Takanori Isobe, Tokyo, JP;
Assignee:
SONY CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/06 (2006.01); H04L 9/14 (2006.01); G06F 17/16 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0625 (2013.01); H04L 9/0631 (2013.01); H04L 9/14 (2013.01); G06F 17/16 (2013.01); H04L 2209/12 (2013.01); H04L 2209/24 (2013.01);
Abstract
An encryption processing system includes an encryption processing circuit that executes a round calculation on input data and generates output data, and a key schedule circuit that outputs key data used in the encryption processing circuit to the encryption processing circuit. Each round calculation executed by the encryption processing circuit includes a linear conversion process executed by a linear conversion circuit, and the linear conversion circuit changes a linear conversion mode of the linear conversion process according to a round transition.