Device forming a logic gate for minimizing the differences...

Details Device forming a logic gate for minimizing the differences... Device forming a logic gate for minimizing the differences...

H - Electricity

03

K

H03K 19/173 (2006.01)

Patent

CA 2607553

The invention relates to 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 (220, 720, 750). 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 invention is for integration in all devices requiring such a protection.

La présente invention concerne une porte logique dont la consommation est indépendante de ses données d'entrées et de son état logique. Pour ce faire, ce dispositif utilise des moyens logiques formant interrupteurs (220, 720, 750). L'intérêt d'un tel dispositif est, par exemple, la protection de cartes à puces et autres cryptosystèmes contre les attaques par canaux auxiliaires telles que les attaques par collision et les attaques par analyse différentielle de courant, puissance ou consommation. Cette protection se fait au niveau matériel. L'invention est destinée à être intégrée à tous les dispositifs nécessitant une telle protection.

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