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. 20, 2025
Filed:
Nov. 16, 2022
Applicant:
Silicon Laboratories Inc., Austin, TX (US);
Inventor:
Steven Cooreman, Nittedal, NO;
Assignee:
Silicon Laboratries Inc., Austin, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0618 (2013.01);
Abstract
An apparatus includes an encryption circuit. The encryption circuit includes a block function circuit to generate a plurality of blocks of output data. A block of output data having an initial sequence number includes more state than used by a ChaCha20 block function. A first part of a keystream is generated from a block of output data having the initial sequence number. A second part of the keystream is generated from blocks of output having sequence numbers other than the initial sequence number.