A) Write a C C program to compute the linear approximation table for this S box B) Find a linear approximation using three active S boxes and use the piling up lemma using c c Sround 1 K2 5 round 2 round 3 OK 4 round 4 st ciphertext Figure 1 Substitution permutation network (SPN) Sround 1 K2 5 round 2 round 3 OK 4 round 4 st ciphertext Figure 1 Substitution permutation network (SPN)

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Question: A) Write a C/C++ program to compute the linear approximation table for this S-box. B) Find a linear approximation using three active S-boxes and use

A) Write a C/C++ program to compute the linear approximation table

A) Write a C/C++ program to compute the linear approximation table for this S-box.

B) Find a linear approximation using three active S-boxes and use the piling-up lemma using c/c++

for this S-box. B) Find a linear approximation using three active S-boxes

and use the piling-up lemma using c/c++ Sround 1 ?K2 5 round

Sround 1 ?K2 5 round 2 round 3 OK 4 round 4 st ciphertext Figure 1: Substitution-permutation-network (SPN) Sround 1 ?K2 5 round 2 round 3 OK 4 round 4 st ciphertext Figure 1: Substitution-permutation-network (SPN)

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