RFA: -Squared Fitting Analysis Model for Power Attack

Algorithm 1

-squared fitting analysis steps on S-box output.

Input: random plaintexts ,

   template .

Output: .

(1)  Encrypt and acquire traces

(2)  for do

(3)      for do

(4)  

(5)  

(6)      end for

(7)      Compute thebetween

    and

(8)  end for

(9)  return