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Temporal Key Integrity Protocol (TKIP)

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Temporal Key Integrity Protocol (TKIP) is an encryption protocol included as part of the IEEE 802.11i standard for wireless LANs (WLANs). It was designed to provide more secure encryption than the notoriously weak Wired Equivalent Privacy (WEP), the original WLAN security protocol

To be able to run on legacy WEP hardware with minor upgrades, TKIP uses RC4 as its cipher

  • Temp Key and MIC Key derived from the WEP key at the end of EAP authentication
  • WPA can be seen as a wrapper for WEP
  • RC4 Key is sender specific
  • Each message uses different RC4 Key
  • 48-bit IV as counter
  • MIC is cryptographic (does not use CRC)