Abstract
This paper presents a new hardware technique for the realization of secure smart-cards. The proposed strategy represents a valid countermeasure against non-invasive attacks, such as power analysis. It is based on a simple sub-circuit (Kocher et al., 1999) that can be easily integrated into the smart-card chip. It has been proven that the new technique decorrelates the power consumed by any digital circuit from the internally elaborated data, thus avoiding extraction of secret information from smart cards during the execution of their internal computations.
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