Answer the following questions based on the following input to the DES algorithm (assume both plaintext
message and key are the same) Hexademical notation : F E D C B A 0 9 8 7 6 5 4 3 2 1 a. Convert the input
value from hex notation into its equivalent binary notation b. Derive the first round subkey c. Derive the left
and right halves of the plaintext message for use in the first DES round then show how the right half is
expanded to 48-bits d. What is the binary operation used to combine the output from (b) with (c). Show the
output of this operation using your answers from (b) and (c) e. The output from (d) is passed through the
S-box operation. Explain what this operation is for and what is the output using the S-box tables shown in
the lecture slides.
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