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Education and Innovation in Embedded Systems Design

USI Università della Svizzera italiana, USI Faculty of Informatics, Advanced Learning and Research Institute USI Università della Svizzera italiana USI Faculty of Informatics USI Advanced Learning and Research Institute
TitleMethod and circuit for data encryption/decryption
Publication TypePatent
Year of Publication2003
AuthorsMacchetti, M., S. Marchesin, U. Bondi, L. Breveglieri, G M. Bertoni, and P. Fragneto
International Patent NumberUS7801301 B2
Application NumberUS 09/974,705
Date PublishedApril
Patent TypeGrant
Patent NumberUS7801301B2
Other NumbersUS20030068036A1
Abstract

Data are converted between an unencrypted and an encrypted format according to the Rijndael algorithm, including a plurality of rounds. Each round is comprised of fixed set of transformations applied to a two-dimensional array, designated state, of rows and columns of bit words. At least a part of said transformations are applied on a transposed version of the state, wherein rows and columns are transposed for the columns and rows, respectively.