One important property which makes DES secure is that the S-boxes are nonlinear. In this problem we verify this property by computing the output of S1 for several pairs of inputs.
Question-1 What is the output of the first round of the DES algorithm when the plaintext and the key are both all zeros?
Question- 2 What is the output of the first round of the DES algorithm when the plaintext and the key are both all ones?
You have to show the output of the first round of the DES algorithm.