The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2005
Filed:
Feb. 17, 2000
Applicants:
Pierre-yvan Liardet, Peynier, FR;
Fabrice Romain, Aix-en-Provence, FR;
Bernard Plessier, Meyreuil, FR;
Brigitte Hennebois, Aix-en-Provence, FR;
Inventors:
Pierre-Yvan Liardet, Peynier, FR;
Fabrice Romain, Aix-en-Provence, FR;
Bernard Plessier, Meyreuil, FR;
Brigitte Hennebois, Aix-en-Provence, FR;
Assignee:
STMicroelectronics SA, Gentilly, FR;
Primary Examiner:
Int. Cl.
CPC ...
G06F017/00 ;
U.S. Cl.
CPC ...
Abstract
A circuit and a method are provided for securing a coprocessor dedicated to cryptography. The disclosed circuit includes a scrambling register and an accessory input register to convey scrambling information in the form of electrical signals that disturb the visibility of certain electrical signals associated with confidential information such as digital keys.