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:
May. 01, 2018
Filed:
Mar. 15, 2013
Applicant:
Cryptography Research, Inc., San Francisco, CA (US);
Inventor:
Joshua M. Jaffe, San Francisco, CA (US);
Assignee:
CRYPTOGRAPHY RESEARCH, INC., San Francisco, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/00 (2013.01); G06F 21/72 (2013.01); G06F 7/72 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
G06F 21/72 (2013.01); G06F 7/723 (2013.01); H04L 9/003 (2013.01); G06F 2207/7238 (2013.01); G06F 2207/7257 (2013.01); H04L 2209/046 (2013.01);
Abstract
Methods and systems for masking certain cryptographic operations in a manner designed to defeat side-channel attacks are disclosed herein. Squaring operations can be masked to make squaring operations indistinguishable or less distinguishable from multiplication operations. In general, squaring operations are converted into multiplication operations by masking them asymmetrically. Additional methods and systems are disclosed for defeating DPA, cross-correlation, and high-order DPA attacks against modular exponentiation.