Patent Number: 6,298,136

Title: Cryptographic method and apparatus for non-linearly merging a data block and a key

Abstract: A method and apparatus for cryptographically converting a digital input data block into a digital output data block. The apparatus has an input for supplying the input data block and a further input for supplying a code conversion digital key K1. Cryptographic processing merges a selected part M1 of the digital input data block with the key K1 to produce a data block B1 which is non-linearly dependent on M1 and K1. The merging is performed in one sequentially inseparable step. The digital output block is derived from a selected part of the data block B1.

Inventors: Den Boer; Huibert (Bonn-Beuel, DE)

Assignee: U.S. Philips Corporation

International Classification: H04L 9/06 (20060101); H04L 009/28 ()

Expiration Date: 10/02/2018