Question: Consider the following simplified DES encryption process. The encryption block is 8 - bit long. The function f ( ) in the encryption process is

Consider the following simplified DES encryption process. The encryption
block is 8-bit long. The function f() in the encryption process is just a bit-wise
XOR function. That is, if the two inputs to the function is 1011 and 1001, then
the output is 0010.

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