Question: This problem provides a numerical example of encryption using a one-round version of DES. We start with: L0= 1101 1100 0000 0000 1100 1100 1111

  1. This problem provides a numerical example of encryption using a one-round version of DES. We start with:

L0= 1101 1100 0000 0000 1100 1100 1111 1111

R0= 1111 0001 1010 1010 1111 0000 1010 1010.

The first round key K1= 0000 1010 0000 0010 0110 0111 1010 1011 0100 1001 1010 0101.

Please calculate the following values:

(a)A=Ex[R0]K1.

(b) The output of S-boxes.

(c)L1andR1.

Hint: Ex[] is the expansion permutation. Use the tables referenced in the DES at https://en.wikipedia.org/wiki/DESsupplementarymaterial

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