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Computer Security Lecture 4.1: DES Supplementary Material

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Mohamed Loey
Mohamed Loey

We will discuss the following: Data Encryption Standard, DES Algorithm, DES Key Creation https://www.youtube.com/watch?v=1-lF4dePpts&list=PLKYmvyjH53q13_6aS4VwgXU0Nb_4sjwuf

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DES Supplementary Material DES Supplementary Material
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
DES Supplementary Material 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 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
DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
DES Supplementary Material Key # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Left Shift 1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1
DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
DES Supplementary Material 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
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material 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
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
DES Supplementary Material 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 1 2 3 4 5 4 5 6 7 8 9 8 9 10 11 12 13 12 13 14 15 16 17 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 16 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 29 30 31 23 1 24 bit 24 bit 16 bit 16 bit
DES Supplementary Material 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
DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
DES Supplementary Material 24 bit 24 bit 16 bit 16 bit S-Box 1 S-Box 2 S-Box 3 S-Box 4 S-Box 5 S-Box 6 S-Box 7 S-Box 8
DES Supplementary Material 0 1 2 . . . 15 0 1 2 3 S-Box 6 bits 4 bits
DES Supplementary Material  S-Box 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
DES Supplementary Material  S-Box 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10 1 3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5 2 0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15 3 13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9
DES Supplementary Material  S-Box 3 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8 1 13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1 2 13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7 3 1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12
DES Supplementary Material  S-Box 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15 1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9 2 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4 3 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14
DES Supplementary Material  S-Box 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9 1 14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6 2 4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14 3 11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3
DES Supplementary Material  S-Box 6 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11 1 10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8 2 9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6 3 4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13
DES Supplementary Material  S-Box 7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1 1 13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6 2 1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2 3 6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12
DES Supplementary Material  S-Box 8 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7 1 1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2 2 7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8 3 2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11
DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
DES Supplementary Material 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 7 20 21 29 12 28 17 1 15 23 26 5 18 31 10 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2 8 24 14 32 27 3 9 19 13 30 6 22 11 4 25
DES Supplementary Material 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
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material 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
DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
DES Supplementary Material facebook.com/mloey mohamedloey@gmail.com twitter.com/mloey linkedin.com/in/mloey mloey@fci.bu.edu.eg mloey.github.io
DES Supplementary Material www.YourCompany.com © 2020 Companyname PowerPoint Business Theme. All Rights Reserved. THANKS FOR YOUR TIME

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Computer Security Lecture 4.1: DES Supplementary Material

  • 1. DES Supplementary Material DES Supplementary Material
  • 2. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 3. DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  • 4. DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  • 5. DES Supplementary Material 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 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
  • 6. DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  • 7. DES Supplementary Material Key # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Left Shift 1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1
  • 8. DES Supplementary Material Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  • 9. DES Supplementary Material 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
  • 10. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 11. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 12. DES Supplementary Material 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
  • 13. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 14. DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
  • 15. DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
  • 16. DES Supplementary Material 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 1 2 3 4 5 4 5 6 7 8 9 8 9 10 11 12 13 12 13 14 15 16 17 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 16 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 29 30 31 23 1 24 bit 24 bit 16 bit 16 bit
  • 17. DES Supplementary Material 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
  • 18. DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
  • 19. DES Supplementary Material 24 bit 24 bit 16 bit 16 bit S-Box 1 S-Box 2 S-Box 3 S-Box 4 S-Box 5 S-Box 6 S-Box 7 S-Box 8
  • 20. DES Supplementary Material 0 1 2 . . . 15 0 1 2 3 S-Box 6 bits 4 bits
  • 21. DES Supplementary Material  S-Box 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
  • 22. DES Supplementary Material  S-Box 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10 1 3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5 2 0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15 3 13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9
  • 23. DES Supplementary Material  S-Box 3 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8 1 13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1 2 13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7 3 1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12
  • 24. DES Supplementary Material  S-Box 4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15 1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9 2 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4 3 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14
  • 25. DES Supplementary Material  S-Box 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9 1 14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6 2 4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14 3 11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3
  • 26. DES Supplementary Material  S-Box 6 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11 1 10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8 2 9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6 3 4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13
  • 27. DES Supplementary Material  S-Box 7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1 1 13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6 2 1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2 3 6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12
  • 28. DES Supplementary Material  S-Box 8 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7 1 1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2 2 7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8 3 2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11
  • 29. DES Supplementary Material 𝑳𝒊−𝟏 𝑹𝒊−𝟏 Expansion Permutation XOR 𝑲𝒊 S-Box Permutation XOR 𝑳𝒊 𝑹𝒊 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit32 bit 32 bit 32 bit
  • 30. DES Supplementary Material 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 7 20 21 29 12 28 17 1 15 23 26 5 18 31 10 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2 8 24 14 32 27 3 9 19 13 30 6 22 11 4 25
  • 31. DES Supplementary Material 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
  • 32. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 33. DES Supplementary Material 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
  • 34. DES Supplementary Material Initial permutation Round 1 Round 2 Round 16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  • 36. DES Supplementary Material www.YourCompany.com © 2020 Companyname PowerPoint Business Theme. All Rights Reserved. THANKS FOR YOUR TIME