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Data Encryption Standard (DES)

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Amir Masinaei

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.

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Data Encryption Standard (DES)
Data Encryption Standard (DES)
3 ‫توجه‬:‫شد‬ ‫خواهید‬ ‫منتقل‬ ‫مربوطه‬ ‫اسالید‬ ‫به‬ ،‫عنوان‬ ‫روی‬ ‫بر‬ ‫کلیک‬ ‫با‬.
4 ‫رمز‬ ‫های‬‫سیستم‬ ‫متقارن‬ ‫ای‬‫دنباله‬ ‫قالبی‬ DES AES
5
6
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
9 1 2 . . . 64 1 2 . . . 321 2 . . . 32 1 2 . . . 321 2 . . . 32 1 2 . . . 64 IP FP
10
11 Shifting ShiftRound
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 76543210S 443125170 017412311 452726212 606240173 00111 101 1 0 01 011 5
14
15
16
17
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 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 Parity-bit drop table 09172533414957 18263442505801 27354351590210 36445260031119 15233139475563 22303846546207 29374553610614 04122028051321
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 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 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 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
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 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 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 1 2 . . . 64 1 2 . . . 321 2 . . . 32 1 2 . . . 321 2 . . . 32 1 2 . . . 64 IP FP
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
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 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 1 2 . . . 64 1 2 . . . 321 2 . . . 32 1 2 . . . 321 2 . . . 32 1 2 . . . 64 IP FP
33 1 2 . . . 32 1 2 . . . 48 Expansion 1 2 . . . 32 1 2 . . . 48 Straight P-Box
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 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 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
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 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
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 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 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 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
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
46 Shifting ShiftRound
47 Shift RightShift Right Shift RightShift Right Shifting ShiftRound Zero bit1
48 Shifting ShiftRound Shift RightShift Right Shift RightShift Right Shifting ShiftRound Zero bit1
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 avalanche effect
51 Plaintext Key Ciphertext 0000000000000000 22234512987ABB23 4789FD476E82A5F1 0000000000000001 0A4ED5C15A63FEA3 1 bit Number of bit differences 29 bits Completeness effect
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 ComplementOriginal EDCBEDCBEDCBEDCB1234123412341234key EDCBA987543210ED12345678ABCDEF12Plaintext 1EED41E210385C98E112BE1DEFC7A367Ciphertext
54 Justin, Matt, Guy
55
56 DES DESDES
57
58
Data Encryption Standard (DES)

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Data Encryption Standard (DES)

  • 3. 3 ‫توجه‬:‫شد‬ ‫خواهید‬ ‫منتقل‬ ‫مربوطه‬ ‫اسالید‬ ‫به‬ ،‫عنوان‬ ‫روی‬ ‫بر‬ ‫کلیک‬ ‫با‬.
  • 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
  • 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
  • 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
  • 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
  • 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
  • 55. 55
  • 57. 57
  • 58. 58