Verfahren und System zur Erzeugung von Chiffrierrundschlüsseln durch Bit-Mischer

Details

Veröffentlichungs-Nr.

EP3337082

Aktenzeichen

EP17195362

Anmeldetag

9. Oktober 2017

Veröffentlichung

15. April 2020

Erteilung

15. April 2020

Rechtsraum

EP

IPC

H04L9/06

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 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, or 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.

Anmelder

Firma

The Boeing Company

Land

🇺🇸 USA

Fachgebiete