The document describes the DES encryption algorithm. It explains the basic components of DES including the initial and final permutations, expansion, substitution boxes, and key schedule that generates the round keys. DES operates on 64-bit blocks using a 56-bit key and performs 16 rounds of processing to encrypt the data.

3. 3
‫توجه‬:‫شد‬ ‫خواهید‬ ‫منتقل‬ ‫مربوطه‬ ‫اسالید‬ ‫به‬ ،‫عنوان‬ ‫روی‬ ‫بر‬ ‫کلیک‬ ‫با‬.

4. 4
‫رمز‬ ‫های‬‫سیستم‬
‫متقارن‬
‫ای‬‫دنباله‬
‫قالبی‬
DES
AES

5. 5

6. 6

7. 7
‫رمزگذار‬DES
1 2 . . . 64
1 2 . . . 64
1 2 . . . 64
1 2 . . . 64
1 2 . . . 56
1 2 . . . 64
1 2 . . . 64
1 2 . . . 64
1 2 . . . 64

8. 8

9. 9
1 2 . . . 64
1 2 . . . 321 2 . . . 32
1 2 . . . 321 2 . . . 32
1 2 . . . 64
IP
FP

10. 10

11. 11
Shifting
ShiftRound

12. 12
52
17
68
001
110
001
0
0
0
0
1
1
1
1
0
0
0
1
1
1
1
1
1
1
1
1

13. 13
76543210S
443125170
017412311
452726212
606240173
00111
101
1 0
01
011
5

14. 14

15. 15

16. 16

17. 17

18. 18
2 3 E y e
32 33 45 79 65
2 3 E y e
32 33 45 79 65
Null
00 00 00
Null
00 00 00

19. 19
2 3 E y e
32 33 45 79 65
Null
00 00 00
0 1 1 0 0 1 1
0 1 1 0 0 1 0
1 0 0 0 1 0 1
1 1 1 1 0 0 1
1 1 0 0 1 0 1
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0
1
0
0
1
1
1
1

20. 20
Parity-bit drop table
09172533414957
18263442505801
27354351590210
36445260031119
15233139475563
22303846546207
29374553610614
04122028051321

21. 21
Parity-bit drop table
09172533414957
18263442505801
27354351590210
36445260031119
15233139475563
22303846546207
29374553610614
04122028051321
0 1 1 0 0 1 0 0
0 1 1 0 0 1 1 1
1 0 0 0 1 0 1 0
1 1 1 1 0 0 1 0
1 1 0 0 1 0 1 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1
Parity drop
0
1
1
0 0 1 1 1 0
0 0 0 0 1 1 0
1 1 0 0 0 0 1
0 1 0 0 0 0
0 0 0 1 1 1 1
0 0 0 0 0 0 0
1 1 0 0 0 0
1 0 0 1 0 0 0

22. 22
0 0 0 1 1 1 0
0 0 0 0 1 1 0
1 1 0 0 0 0 1
0 1 1 0 0 0 0
0 0 0 1 1 1 1
0 0 0 0 0 0 0
1 1 0 0 0 1 0
1 0 0 1 0 0 0
0 0 0 1 1 1 0
0 0 0 0 1 1 0
1 1 0 0 0 0 1
0 1 1 0 0 0 0
0 0 0 1 1 1 1
0 0 0 0 0 0 0
1 1 0 0 0 1 0
1 0 0 1 0 0 0

23. 23
0 0 0 1 1 1 0
0 0 0 0 1 1 0
1 1 0 0 0 0 1
0 1 1 0 0 0 0
0 0 0 1 1 1 1
0 0 0 0 0 0 0
1 1 0 0 0 1 0
1 0 0 1 0 0 0
Shifting
ShiftRound
0 0 1 1 1 0 0
0 0 0 1 1 0 1
1 0 0 0 0 1 0
1 1 0 0 0 0 0
0 0 1 1 1 1 0
0 0 0 0 0 0 1
1 0 0 0 1 0 1
0 0 1 0 0 0 0

24. 24
Key-compression table
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

25. 0 0 1 1 1 1 0
0 0 0 0 0 0 1
1 0 0 0 1 0 1
0 0 1 0 0 0 0
0 0 1 1 1 0 0
0 0 0 1 1 0 1
1 0 0 0 0 1 0
1 1 0 0 0 0 0
Key-compression table
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
25
compression
1
1
0
0 1 0 0 1
1 0 1 0 0 0
1 0 1 1 0 0
0 0 0 1 0 0
0 1 1 0 1 0
0 0 0 1 0
0 1 0 0 0
0 1 0 0 0 1

26. 26
1 0 1 0 0 1
1 0 1 0 0 0
1 0 1 1 0 0
0 0 0 1 0 0
0 1 1 0 1 0
0 0 0 0 1 0
0 1 0 0 1 0
0 1 0 0 0 1

27. 27
Round Number Sub Key
1 A6 8B 04 68 24 91
2 A2 35 03 A2 B0 31
3 69 06 45 23 0F 22
4 41 D0 98 1C 09 12
5 14 81 F2 45 40 54
6 B6 48 03 41 A0 C8
7 2B 23 04 A0 94 0D
8 08 14 9D 0A 16 A6
9 49 44 C0 08 71 22
10 50 C9 B8 24 68 24
11 94 A1 03 E0 08 D2
12 23 0E 07 85 82 1B
13 69 30 84 17 16 40
14 10 84 F8 18 81 64
15 D4 40 32 00 EC 84
16 14 EB 22 00 38 C9

28. 28
1 2 . . . 64
1 2 . . . 321 2 . . . 32
1 2 . . . 321 2 . . . 32
1 2 . . . 64
IP
FP

29. 29
Char S c o r p i o n
Hex
0 1 1 0 0 0 1 1
0 1 0 1 0 0 1 1
0 1 1 0 1 1 1 1
0 1 1 1 0 0 1 0
0 1 1 1 0 0 0 0
0 1 1 0 1 0 0 1
0 1 1 0 1 1 1 1
0 1 1 0 1 1 1 0
53 63 6F 72 70 69 6F 6E

30. 0 1 0 1 0 0 1 1
0 1 1 0 0 0 1 1
0 1 1 0 1 1 1 1
0 1 1 1 0 0 1 0
0 1 1 1 0 0 0 0
0 1 1 0 1 0 0 1
0 1 1 0 1 1 1 1
0 1 1 0 1 1 1 0
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
30
IP
1
0
1
1 1 1 1 1 1 1
0 0 0 1 1 0 0 1
1 1 0 0 0 1 0 0
0 1 1 0 0 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 0
1 1 1 0 0 1 0
1 1 0 0 1 1 1 1

31. 31
1 1 1 1 1 1 1 1
0 0 0 1 1 0 0 1
1 1 0 0 0 1 0 0
0 1 1 0 0 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 0
1 1 1 0 0 1 0 0
1 1 0 0 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 1 1 0 0 1
1 1 0 0 0 1 0 0
0 1 1 0 0 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 0
1 1 1 0 0 1 0 0
1 1 0 0 1 1 1 1
1 2 . . . 64
1 2 . . . 321 2 . . . 32
1 2 . . . 321 2 . . . 32
1 2 . . . 64
IP
FP

32. 32
1 2 . . . 64
1 2 . . . 321 2 . . . 32
1 2 . . . 321 2 . . . 32
1 2 . . . 64
IP
FP

33. 33
1 2 . . . 32
1 2 . . . 48
Expansion
1 2 . . . 32
1 2 . . . 48
Straight P-Box

34. 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 0
1 1 1 0 0 1 0 0
1 1 0 0 1 1 1 1
Expansion
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
34
0
1
1
1 0 0 0 0
0 0 0 0 0 1
0 1 1 1 1 1
1 1 1 1 0 1
0 1 1 1 0 0
0 0 0 0 1
0 1 1 0 0
0 1 1 1 1 0
1 2 . . . 32
Expansion
1 2 . . . 48
Expansion

35. 35
1 0 1 0 0 1
1 0 1 0 0 0
1 0 1 1 0 0
0 0 0 1 0 0
0 1 1 0 1 0
0 0 0 0 1 0
0 1 0 0 1 0
0 1 0 0 0 1
1 0 0 0 0 0
0 0 0 0 0 1
0 1 1 1 1 1
1 1 1 1 0 1
0 1 1 1 0 0
0 0 1 0 0 1
0 1 1 0 0 1
0 1 1 1 1 0
0 0 1 0 0 1
1 0 1 0 0 1
1 1 0 0 1 1
1 1 1 0 0 1
0 0 0 1 1 0
0 0 1 0 1 1
0 0 1 0 1 1
0 0 1 1 1 1

36. 36
0 0 1 0 0 1
1 0 1 0 0 1
1 1 0 0 1 1
1 1 1 0 0 1
0 0 0 1 1 0
0 0 1 0 1 1
0 0 1 0 1 1
0 0 1 1 1 1
0 0 1 0 0 1 1 0 1 0 0 1 1 1 0 0 1 1 1 1 1 0 0 1
0 0 0 1 1 0 0 0 1 0 1 1 0 0 1 0 1 1 0 0 1 1 1 1

37. 37

38. 38
14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7
0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8
4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0
15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8
13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1
13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7
1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12
2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9
14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6
4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14
11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3
4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1
13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6
1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2
6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12
15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10
3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5
0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15
13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9
7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15
13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9
10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4
3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14
12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11
10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8
9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6
4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13
13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7
1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2
7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8
2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11

39. 39
1 1 1 0
0 0 1 1
1 1 1 1
1 1 0 0
0 0 0 1
1 1 0 0
1 0 0 1
0 1 0 0
1 1 1 0 0 0 1 1 1 1 1 1 1 1 0 0
0 0 0 1 1 1 0 0 1 0 0 1 0 1 0 0
0 0 1 0 0 1 1 0 1 0 0 1 1 1 0 0 1 1 1 1 1 0 0 1
0 0 0 1 1 0 0 0 1 0 1 1 0 0 1 0 1 1 0 0 1 1 1 1

40. 1 1 1 0
0 0 1 1
1 1 1 1
1 1 0 0
0 0 0 1
1 1 0 0
1 0 0 1
0 1 0 0
Straight
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
40
1
0
1
0 1 1 0 1 1 0
1 0 0 0 0 0 0 1
1 1 0 1 0 1 1
0 1 0 1 1 0 1
Straight P-Box

41. 41
1 1 1 1 1 1 1 1
0 0 0 1 1 0 0 1
1 1 0 0 0 1 0 0
0 1 1 0 0 1 1 1
0 1 1 1 0 1 1 0
1 0 0 0 0 0 0 1
1 1 0 1 0 0 1 1
0 1 1 0 1 1 0 1
1 0 0 0 1 0 0 1
1 0 0 1 1 0 0 0
0 0 0 1 0 1 1 1
0 0 0 0 1 0 1 0

42. 42
1 0 0 0 1 0 0 1
1 0 0 1 1 0 0 0
0 0 0 1 0 1 1 1
0 0 0 0 1 0 1 0
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 0
1 1 1 0 0 1 0 0
1 1 0 0 1 1 1 1

43. 43
Round
Number
Output
Left Right
1 00 FE E4 CF 89 98 17 0A
2 89 98 17 0A 21 6A B2 F7
3 21 6A B2 F7 70 8A 7F 16
4 70 8A 7F 16 C9 5E 35 3C
5 C9 5E 35 3C 7F FA 7F DB
6 7F FA 7F DB 45 32 F5 FC
7 45 32 F5 FC C1 87 B2 D7
8 C1 87 B2 D7 5C C5 B7 F8
9 5C C5 B7 F8 48 62 AE 85
10 48 62 AE 85 49 A2 50 6D
11 49 A2 50 6D BD F0 99 B2
12 BD F0 99 B2 20 23 75 61
13 20 23 75 61 2C D7 A8 76
14 2C D7 A8 76 17 0D 65 9C
15 17 0D 65 9C 0A 43 32 8F
16 BC 9E CB 55 0A 43 32 8F
1 2 . . . 64
1 2 . . . 321 2 . . . 32
1 2 . . . 321 2 . . . 32
1 2 . . . 64
IP
FP

44. 1 0 1 1 1 1 0 0
1 0 0 1 1 1 1 0
1 1 0 0 1 0 1 1
0 1 0 1 0 1 0 1
Final Permutation
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
0 0 0 0 1 0 1 0
0 1 0 0 0 0 1 1
0 0 1 1 0 0 1 0
1 0 0 0 1 1 1 1
44
FP
0
0
1
0 1 0 0 1 1 1
1 0 1 1 1 1 1 0
0 1 0 1 0 0 1 1
1 1 0 1 0 1 1 0
0 0 0 1 0 0 0
0 1 0 1 1 0 0 1
0 0 1 0 1 0 1
0 1 0 1 0 1 1 0

45. 45

46. 46
Shifting
ShiftRound

47. 47
Shift RightShift Right
Shift RightShift Right
Shifting
ShiftRound
Zero bit1

48. 48
Shifting
ShiftRound
Shift RightShift Right
Shift RightShift Right
Shifting
ShiftRound
Zero bit1

49. 49
Round
Number
Sub Key
Output
Left Right
1 14EB220038C9 0A43328F 170D659C
2 D4403200EC84 170D659C 2CD7A876
3 1084F8188164 2CD7A876 20237561
4 693084171640 20237561 BDF099B2
5 230E0785821B BDF099B2 49A2506D
6 94A103E008D2 49A2506D 4862AE85
7 50C9B8246824 4862AE85 5CC5B7F8
8 4944C0087122 5CC5B7F8 C187B2D7
9 08149D0A16A6 C187B2D7 4532F5FC
10 2B2304A0940D 4532F5FC 7FFA7FDB
11 B6480341A0C8 7FFA7FDB C95E353C
12 1481F2454054 C95E353C 708A7F16
13 41D0981C0912 708A7F16 216AB2F7
14 690645230F22 216AB2F7 8998170A
15 A23503A2B031 8998170A 00FEE4CF
16 A68B04682491 FF19C467 00FEE4CF
plaintext 53636F7270696F6E Scorpion

50. 50
avalanche effect

51. 51
Plaintext Key Ciphertext
0000000000000000
22234512987ABB23
4789FD476E82A5F1
0000000000000001 0A4ED5C15A63FEA3
1 bit Number of bit differences 29 bits
Completeness effect

52. 52
0101 0101 0101 0101 0000000 0000000
1F1F 1F1F 0E0E 0E0E 0000000 FFFFFFF
E0E0 E0E0 F1F1 F1F1 FFFFFFF 0000000
FEFE FEFE FEFE FEFE FFFFFFF FFFFFFF

53. 53
ComplementOriginal
EDCBEDCBEDCBEDCB1234123412341234key
EDCBA987543210ED12345678ABCDEF12Plaintext
1EED41E210385C98E112BE1DEFC7A367Ciphertext

54. 54
Justin, Matt, Guy

55. 55

56. 56
DES DESDES

57. 57

58. 58