公开(公告)号：FR2888433A1

公开(公告)日：2007-01-12

申请号：FR0552043

申请日：2005-07-05

Applicant: ST MICROELECTRONICS SA

Inventor： SOZZANI FABIO

IPC: H04L9/30

Abstract: L'invention concerne un procédé et un circuit de protection d'une quantité numérique stockée dans un microcontrôleur (1) comportant une interface JTAG (17'), consistant à rendre ladite quantité numérique dépendante d'une valeur (HID-VAL) stockée de façon non volatile dans le microcontrôleur et rendue inaccessible si des signaux sont présents en entrée de l'interface JTAG.

公开(公告)号：DE602004023436D1

公开(公告)日：2009-11-12

申请号：DE602004023436

申请日：2004-03-29

Applicant: ST MICROELECTRONICS SA ,  ST MICROELECTRONICS SRL

Inventor： TEGLIA YANNICK ,  ROMAIN FABRICE ,  LIARDET PIERRE-YVAN ,  FRAGNETO PASQUALINA ,  SOZZANI FABIO ,  BERTONI GUIDO

IPC: H04L9/06

Abstract: A processor for executing a Rijndeal algorithm which applies a plurality of encryption rounds to a data block array in order to obtain an array of identical size, each round involving a key block array and a data block substitution table, wherein said processor comprises: a first input register (102) containing an input data block column; an output register (111) containing an output data block column or an intermediate block column; a second input register (101) containing a key block column or the intermediate data blocks; a block substitution element (104) receiving the data one block at a time following the selection (103) thereof in the first register and providing, for each block, a column of blocks; an element (109) applying a cyclic permutation to the substitution circuit column blocks; and an Exclusive-OR combination element (110) combining the permutation circuit column blocks with the content of the second register, the result of said combination being loaded into the output register.

公开(公告)号：DE602006019666D1

公开(公告)日：2011-03-03

申请号：DE602006019666

申请日：2006-07-05

Applicant: ST MICROELECTRONICS SA

Inventor： SOZZANI FABIO

IPC: H04L9/00 ,  G01R31/317 ,  G01R31/3185