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...

2011-01-04

2011-01-04

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Security

C326S113000, C380S255000

Reexamination Certificate

active

07863926

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.

REFERENCES:
patent: 5901083 (1999-05-01), Atsumi et al.
patent: 2004/0030858 (2004-02-01), Lines et al.
patent: WO-2005029704 (2005-03-01), None
Tiri K et al: “A Dynamic And Differential CMOS Logic With Signal Independent Power Consumption To Withstand Differential Power Analysis On Smart Cards”, Proceedings of the European Solid State Circuits Conference, 2002, pp. 403-406, XP-001223944.
International Search Report, PCT/EP2006/062037.

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