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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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