09946662 cites 17 patents.

A method of providing security in a computer system includes dividing a block of data into initial left and right halves, and calculating updated left and right halves for each of a plurality of rounds. Calculating the updated left half includes applying a first function to an input left half to produce a first result, and mixing the first result with an input right half. Calculating the updated right half includes applying a second function to the input left half to produce a second result, and mixing the second result with a round key. The input left and right halves are the initial left and right halves for the first round, and thereafter the updated left and right halves for an immediately preceding round. And method may include producing a block of ciphertext with a key composed of the updated left and right halves for the last round.

Title
Double-mix Feistel network for key generation or encryption
Application Number
14/472978
Publication Number
9946662 (B2)
Application Date
August 29, 2014
Publication Date
April 17, 2018
Inventor
Laszlo Hars
Lafayette
CO, US
Agent
Womble Bond Dickinson
Assignee
THE BOEING COMPANY
IL, US
IPC
G06F 21/85
G06F 12/14
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