Permutation f(ri, Ki= P(s(e(rio kin) P fixed permutation 167202129122817 11523265183110 282414322739 19133062211425 Result: bitstring of length 3223 Permutation • f (Ri-1 , Ki ) = P(S(E(Ri-1 )  Ki )) P fixed permutation 16 7 20 21 29 12 28 17 1 15 23 26 5 18 31 10 2 8 24 14 32 27 3 9 19 13 30 6 22 11 4 25 ▪ Result: bitstring of length 32!!