An Efficient ASIC Implementation of CLEFIA Encryption/Decryption Algorithm With Novel S-Box Architectures

CLEFIA- A Encryption Algorithm using Novel S-Box Architecture

“…The GFN structures use the F0 and F1 where each F-function uses the round keys RKi and RKi+1. The subblocks used to implement the CLEFIA algorithm are illustrated below [1].…”

“…These are random boxes. These are combined using the Galois field multiplier [1][3] [7]. The lookup table where the S0 values are defined in predefined tables is the most common way of implementing the S0 boxes.…”

“…But here we have employed the Algebraic Normal Form (ANF) approach. The SS0, SS1, SS2 and SS3 are basically formulated using ANF expression and gates are used to represent it [1]. This is…”

“…The polynomial deployed to implement the S1 box is z 8 +z 4 +z 3 +z 2 +1. The technique in order to introduce the novelty in the design, we have used the Composite Field Approach (CFA) [1]. b= g (f (a) -1 ) if f (a) /= 0 b= g (0) if f (a) = 0 In the above equation b and a represents S-box output and input respectively.…”