Subject: about 802.1x

From: [email-masked]
Date: Wed, 21 Nov 2001 23:20:21 +0800 (CST)

In 802.11,if 802.1x authentication messages are not be encrypted,user are vulnerable

 to denial of service.For example,attackers can send error response to authenticator

 before the valid user because of media contention(DCF),so the authenticator will set

 controlled-port "unauthorized".

 To encrypt these messages,how to get encryption key before 802.1x authentication 

 procedure?