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:
Jun. 27, 2023
Filed:
Nov. 09, 2020
Applicant:
Xilinx, Inc., San Jose, CA (US);
Inventors:
Assignee:
XILINX, INC., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/06 (2006.01); H04L 9/08 (2006.01); H03K 19/21 (2006.01); H04L 9/34 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0861 (2013.01); H03K 19/21 (2013.01); H04L 9/0631 (2013.01); H04L 9/34 (2013.01); H04L 2209/12 (2013.01); H04L 2209/24 (2013.01);
Abstract
N key generation circuits are arranged in a pipeline having N stages. Each key generation circuit is configured to generate a round key as a function of a respective input key and a respective round constant. Output signal lines that carry the round key from a key generation circuit in a stage of the pipeline, except the key generation circuit in a last stage of the pipeline, are coupled to the key generation circuit in a successive stage of the pipeline to provide the respective input key.