Welcome to the resource topic for 2012/509
Title:
On 3-share Threshold Implementations for 4-bit S-boxes
Authors: Sebastian Kutzner, Phuong Ha Nguyen, Axel Poschmann, Huaxiong Wang
Abstract: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%.
ePrint: https://eprint.iacr.org/2012/509
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