Question: 'shift cipher' ( 5 - 5 - 5 - 5 - 5 ) : Suppose that we use a shift cipher that has a 4

'shift cipher' (5-5-5-5-5): Suppose that we use a shift cipher
that has a 4-bit input and 4-bit output as a block cipher. Let the shift cipher key be k=3,
i.e. Ek(A(0000))= D(0011) and the

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