S-box and Side Channel Attacks

2017-12-15 13:39:48

S-boxes with non-linearity greater than 112 are considered prone to side channel attacks.

If a non-linear S- box with non- linearity greater than 112 (excluding bent functions with non-linearity of 120) is implemented through lookup tables, then the amount of power consumption should be similar to 112 S-box. In other words, side channel attacks shouldn't be able to distinguish between the two S-boxes. The question is, if an S-box with non-linearity greater than 112, implemented through look ups is safe or not?