The most important in WLAN security is the process
of authentication. There are several techniques in
authentication process such as Internet Authentication
intention that Wireless Client can be known by the NPS
Server. To be more understood about the process of
authentication, a flowchart of authentication process
based on PEAP MSCHAP is shown in Fig. 2. PEAP
MSCHAP V2 authentication process occurs in two
phases. The first phase uses the protocol EAP to open
channel TLS. The second phase uses the protocol EAP to
do authentication mechanism of username and password
who want to connect to the Wireless LAN through SSID
Internal.