Abstract. Higher-order side channel attacks is a class of powerful techniques against cryptographic implementations. Their complexity grows exponentially with the order, but for small orders (e.g. 2 and 3) recent studies have demonstrated that they pose a serious threat in practice. In this context, it is today of great importance to design software countermeasures enabling to counteract higher-order side channel attacks for any arbitrary chosen order. At CHES 2010, Rivain and Prouff have introduced such a countermeasure for the AES. It works for any arbitrary chosen order and benefits from a formal resistance proof. Until now, it was the single one with such assets. By generalizing at any order a countermeasure introduced at ACNS 2010 by Genelle et al. , we propose in this paper an alternative to Rivain and Prouff's solution. The new scheme can also be proven secure at any order and has the advantage of being at least 2 times more efficient than the existing solutions for orders 2 and 3, while maintaining the RAM consumption lower than 200 bytes.
Genelle et al. REF proposed a method to securely switch between Boolean and multiplicative masking at any order.
M.: Thwarting higher-order side channel analysis with additive and multiplicative maskings
IACR Cryptology ePrint Archive
IACR Cryptology ePrint Archive
Mathematics Computer Science