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:
Apr. 01, 2014
Filed:
Feb. 17, 2005
Applicants:
Shigeru Arisawa, Tokyo, JP;
Seiji Esaka, Tokyo, JP;
Inventors:
Shigeru Arisawa, Tokyo, JP;
Seiji Esaka, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/00 (2013.01); H04L 9/00 (2006.01); H04L 9/06 (2006.01); G06F 1/08 (2006.01); G06F 1/10 (2006.01); G06F 1/12 (2006.01); G06F 1/32 (2006.01); G06F 21/72 (2013.01);
U.S. Cl.
CPC ...
H04L 9/002 (2013.01); H04L 9/003 (2013.01); H04L 9/0612 (2013.01); G06F 1/08 (2013.01); G06F 1/10 (2013.01); G06F 1/12 (2013.01); G06F 1/3203 (2013.01); G06F 21/72 (2013.01);
Abstract
When an encryption processing circuit encrypts data, a current flows in the encryption processing circuit. A noise current generated by a noise generation circuit is superimposed on the current consumed by the encryption processing circuit. The present invention is applicable to an IC chip that encrypts plaintext data using a key, thus preventing the key from being broken by DPA attacks based on analysis of the current consumption to provide high security.