802.1x Authentication
Static WEP key is difficult to manage. When you
change the key, you need to inform everyone. Once
the key is disclosed, there is no security. In addition,
since static WEP encryption has serious security holes,
the WEP key can be decrypted by receiving multiple
data. 802.1X was first used in the wired Ethernet
connection to prevent illegal users using the network.
Later, people discovered that 802.1x authentication
can be used to solve the security problems of wireless
network connection. The EAP-TLS of 802.1x
accomplished the bidirectional authentication between
the users and networks. It can either prevent the
illegal users using the network or the users connecting
to the illegal AP. 802.1x uses dynamic WEP encryption
to prevent the decryption of WEP Key. In order to
solve the distributing problems of digital certificates,
people improve the TLS certificate into TTLS and PEAP.
Thus, users can use the traditional Username
authentication method to access the Internet.
