802.11i provides sophisticated authentication using a variety of protocols (PSK, 802.1X) and strong security with the AES-CCMP encryption protocol.
WEP --> uses RC4 encryption WPA - draft of 802.11i (Home and small office) TKIP -> automatic key management (key mixing) -> per-frame keying (key mixing) -> sequence counter / 48bit IV (replay protection) -> new message integrity check (Michael integrity check) => uses RC4 encryption WPA2 - 802.11i - RSN (Home and small office) CCMP - AES RSN The earlier EAP exchange or WPA2-PSK has provided the shared secret key PMK PTK = PBKDF2-SHA1(PMK + ANonce + SNonce + AP MAC + STA MAC)
RSN packets PEAP packets
WEP - Wired Equivalent Privacy WPA - WiFi Protected Access TKIP - Temporal Key Integrity Protocol CCMP - Counter Mode with CBC-MAC Protocol RSN - Robust Security Network PMK - Pairwise Master Key PTK - Pairwise Transient Key
PEAP