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:
Aug. 11, 2020
Filed:
Dec. 16, 2016
The Boeing Company, Chicago, IL (US);
Laszlo Hars, Lafayette, CO (US);
THE BOEING COMPANY, Chicago, IL (US);
Abstract
System and methods for generating round keys for a cryptographic operation are disclosed. The systems and method can use logic circuits that are operable to: obtain first inputs and second inputs; perform a bit-mixer operation on each of the first inputs and the second inputs; and generate round keys based on the performing the bit-mixer operation. The first inputs include a plurality of equal sized subkeys from a key material that is divided into a plurality of equal sized key material sub-blocks, a cipher key and the second inputs include a random input, one or more previous round keys, a round number. The cryptographic operation includes a cipher, a hash function, or a stream generator. The bit-mixer operation includes an exclusive-OR (XOR) tree, a substitution-permutation network, or a double-mix Feistel network, or a Rotate-Add-XOR (RAX) construction.