802.11 Authentication & WEP

Open System authentication

Simple (null type auth)

Shared key authentication (via WEP Wired Equivalent Privacy)

Shared secret key (encryption key = authentication key!)
Encryption des trames data (et... une partie des trames de gestion)

station (request) auth_frame -> AP 
AP	(send) auth_frame rand(128bytes) -> station
station (send) encrypt(rand(128bytes)	 -> AP
AP	(send) ok if match / nok         -> station