DES補充材料

初始置換(IP, Initial permutation)

 58 50 42 34 26 18 10 2 60 52 44 36 28 20 12 4 62 54 46 38 30 22 14 6 64 56 48 40 32 24 16 8 57 49 41 33 25 17 9 1 59 51 43 35 27 19 11 3 61 53 45 37 29 21 13 5 63 55 47 39 31 23 15 7

最終置換 (IP-1)

 40 8 48 16 56 24 64 32 39 7 47 15 55 23 63 31 38 6 46 14 54 22 62 30 37 5 45 13 53 21 61 29 36 4 44 12 52 20 60 28 35 3 43 11 51 19 59 27 34 2 42 10 50 18 58 26 33 1 41 9 49 17 57 25

IP-1（亦被稱為FP）是IP的逆過程，上表的含義與IP的相似。

擴張函數 (E函數)

 32 1 2 3 4 5 4 5 6 7 8 9 8 9 10 11 12 13 12 13 14 15 16 17 16 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 29 30 31 32 1

P置換

 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

P置換將32位的半塊數據重新排列。

選擇置換1(PC-1)

 左 57 49 41 33 25 17 9 1 58 50 42 34 26 18 10 2 59 51 43 35 27 19 11 3 60 52 44 36 右 63 55 47 39 31 23 15 7 62 54 46 38 30 22 14 6 61 53 45 37 29 21 13 5 28 20 12 4

選擇置換2(PC-2)

 14 17 11 24 1 5 3 28 15 6 21 10 23 19 12 4 26 8 16 7 27 20 13 2 41 52 31 37 47 55 30 40 51 45 33 48 44 49 39 56 34 53 46 42 50 36 29 32

置換盒 (S盒)

S盒
S1
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7
0yyyy1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8
1yyyy0 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0
1yyyy1 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
S2
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10
0yyyy1 3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5
1yyyy0 0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15
1yyyy1 13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9
S3
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8
0yyyy1 13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1
1yyyy0 13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7
1yyyy1 1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12
S4
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15
0yyyy1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9
1yyyy0 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4
1yyyy1 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14
S5
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9
0yyyy1 14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6
1yyyy0 4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14
1yyyy1 11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3
S6
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11
0yyyy1 10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8
1yyyy0 9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6
1yyyy1 4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13
S7
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1
0yyyy1 13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6
1yyyy0 1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2
1yyyy1 6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12
S8
x0000x x0001x x0010x x0011x x0100x x0101x x0110x x0111x x1000x x1001x x1010x x1011x x1100x x1101x x1110x x1111x
0yyyy0 13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7
0yyyy1 1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2
1yyyy0 7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8
1yyyy1 2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11

1 1
2 1
3 2
4 2
5 2
6 2
7 2
8 2
9 1
10 2
11 2
12 2
13 2
14 2
15 2
16 1