@Patent {10.pat20030068036PATENT, title = {Method and circuit for data encryption/decryption}, number = {US 09/974,705}, year = {2003}, month = {April}, type = {Grant}, chapter = {US7801301 B2}, 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.}, issn = {US7801301B2}, author = {Macchetti, Marco and Marchesin, Stefano and Bondi, Umberto and Breveglieri, Luca and Bertoni, Guido Marco and Fragneto, Pasqualina} }