IACR News item: 03 September 2012
Sebastian Kutzner, Phuong Ha Nguyen, Axel Poschmann, Huaxiong Wang
ePrint Report
One of the most promising lightweight hardware countermeasures against SCA attacks is the so-called Threshold Implementation (TI) countermeasure. In this work we resolve many of the remaining open issues towards it\'s applicability. In particular, our contribution is
three-fold: first we define which optimal (from a cryptographic point of view)
S-boxes can be implemented with a 3-share TI. Second, we
introduce two methodologies to efficiently implement
these S-boxes. Third, as an example, we successfully apply these
methodologies to PRESENT and are able to decrease the area requirements of its protected S-box
by 57\\%.
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