1. Consider the block cipher in Figure 8.5. Suppose that each block cipher T i simply reverses the order of the eight input bits (so that, for example, XXXXXXXXXXbecomes XXXXXXXXXXFurther suppose that...

1. Consider the block cipher in Figure 8.5. Suppose that each block cipher
T_i

simply reverses the order of the eight input bits (so that, for example, 11110000 becomes 00001111). Further suppose that the 64-bit scrambler does not modify any bits (so that the output value of the
mth bit is equal to the input value of the
mth bit). (a) With
n
= 3 and the original 64-bit input equal to 10100000 repeated eight times, what is the value of the output? (b) Repeat part (a) but now change the last bit of the original 64-bit input from a 0 to a 1. (c) Repeat parts (a) and (b) but now suppose that the 64-bit scrambler inverses the order of the 64 bits.