WPA_BACKGROUND(8) (NAME) wpa_background - wpa_supplicant WPA IEEE 802.11 . I () IEEE 802.11 ( http://www.ieee802.org/11) . IEEE 802.11i IEEE 802.11 . (Wi-Fi Alliance http://www.wi-fi.org) IEEE 802.11i ( .) (WLAN) . Wi-Fi Protected Access WPA . . WPA ( http://www.wi-fi.org/OpenSection/protected_access.asp) . IEEE 802.11 (WEP) . WEP RC4 (IV) (CRC32) . : RC4 ( ) IV IV (Replay Protection) (Bit Flipping) . WPA . (TKIP) WEP . TKIP . WEP RC4 RC4 . (Michael MIC) . . WPA ( RADIUS) EAP IEEE 802.1X (Pre-Shared Keys) . WPA-Enterprise WPA-Personal . (Master Session Key) (Authenticator / AP) (Supplicant) . WPA ( 4-Way Handshake Group Key Handshake) (AP) (Supplicant) . . ( ). IEEE 802.11I / WPA2 IEEE 802.11i WPA IEEE 802.11 . IEEE 802.11i WPA WPA2 . (CCMP: AES CBC-MAC) TKIP (Handoff) (Pre-Authentication) PMKSA . (SEE ALSO) wpa_supplicant(8) (LEGAL) wpa_supplicant Jouni Malinen . . BSD ( ) . wpa_supplicant 07 August 2019 WPA_BACKGROUND(8)