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  1. +----------------+ +-----------------+
  2. | Client | | Access Point |
  3. +-------+--------+ +--------+--------+
  4. | |
  5. | +--------+--------+
  6. |Cleartext "AckNounce"| Generating a |
  7. | <-----------------+ random Number |
  8. | 1 | "AckNounce" |
  9. +--------+--------+ | |
  10. | Generating a | +--------+--------+
  11. | random number | |
  12. | "SynNounce" | |
  13. | | |
  14. +--------+--------+ |
  15. | |
  16. +--------+--------+ Cleartext SynNounce |
  17. |PTK=PRF(PMK, | +KCK - Encrypted |
  18. |Client Mac, | MIC |
  19. |AP MAC, AckNounce+-----------------> |
  20. |,SynNounce | 2 |
  21. +---------+-------+ |
  22. | +--------+--------+
  23. | | |
  24. | KEK - Encrypted GTK|PTK=PRF(PMK, |
  25. | + KCK - Encrypted |Client Mac, |
  26. | MIC |AP MAC, AckNounce|
  27. | <----------------+,SynNounce |
  28. +---------+-------+ 3 +--------+--------+
  29. | | KEK - Encrypted GTK |
  30. | Verifies AP | + KCK - Encrypted |
  31. | if AP has correct MIC |
  32. | PTK by | |
  33. | decrypting +----------------> |
  34. | Messege and M IC| 4 |
  35. | | +--------+--------+
  36. +---------+-------+ |Verifies AP |
  37. | |if AP has correc |
  38. | |PTK by |
  39. | |decrypting |
  40. | |Messege and M IC |
  41. | +--------+--------+
  42. | |
  43. + +
  44.  
  45. +------------------------+--------------------------------------------------------------+
  46. |Standard | Authentication method |Encryption Method |Cipher |
  47. +---------------------------------------------------------------------------------------+
  48. +---------------------------------------------------------------------------------------+
  49. |802.11 / WEP | Open System or Shared Key |WEP |RC4 |
  50. +---------------------------------------------------------------------------------------+
  51. |WPA Personal | WPA Passphrase |TKIP |RC4 |
  52. +---------------------------------------------------------------------------------------+
  53. |WPA Enterprise | 802.1x/EAP |TKIP |RC4 |
  54. +---------------------------------------------------------------------------------------+
  55. |WPA2 Personal/802.11i | WPA2 Passphrase |CCMP (default) |AES (default)|
  56. | | |TKIP (optional) |RC4 (optional|
  57. +---------------------------------------------------------------------------------------+
  58. |WPA2 Enterprise/802.11i | 802.1x/EAP |CCMP(default) |AES (default)|
  59. | | |TKIP (optional) |RC4 (optional|
  60. +------------------------+--------------------------------------------------------------+
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