Abstract: An electrical device having a logic gate whose consumption is independent from its input data and its logic state. To this end, the device uses logic means forming switches. The interest in having a device of this type is, for example, to protect chip cards and other cryptosystems from attacks via auxiliary channels, such as collision attacks by and attacks by differential analysis of current, power or consumption. This protection is provided by the hardware. The device is for integration in all devices requiring such a protection.
Type:
Grant
Filed:
May 4, 2006
Date of Patent:
January 4, 2011
Assignee:
Etat Francais, représenté par le Secretariat General de la Defense Nationale
Inventors:
Loïc Duflot, Philippe Le Moigne, Fabien Germain
Abstract: The invention relates to a device for forming an electric circuit comprising logic means (30) generating and using small signals of intermediate levels between the device supply levels and means for detecting signals leaving the small signal range.
Type:
Application
Filed:
June 6, 2006
Publication date:
December 10, 2009
Applicant:
ETAT FRANCAIS, represente' par le SECRETARIAT GENERAL DE LA DEFENSE NATIONALE