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:
Dec. 16, 2025
Filed:
Sep. 19, 2022
Applicant:
Cryptography Research, Inc., San Jose, CA (US);
Inventors:
Michael Alexander Hamburg, Laguna Beach, CA (US);
Helena Handschuh, Palo Alto, CA (US);
Mark Evan Marson, Carlsbad, CA (US);
Winthrop John Wu, Pleasanton, CA (US);
Assignee:
Cryptography Research, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0631 (2013.01);
Abstract
Aspects of the present disclosure involve a method and a system to perform the method to obtain a cryptographic output of a plurality of rounds of a cipher, by performing a plurality of modified rounds of the cipher, each of the modified rounds computing an unmasking transform, an operation of a respective round of the cipher, and a masking transform, the unmasking transform being an inverse of the masking transform of a previous round of the cipher.