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Appendix E Wireless LANs
NWA1000 Series User’s Guide
188
4 The RADIUS server distributes the PMK to the AP. The AP then sets up a key hierarchy and
management system, using the PMK to dynamically generate unique data encryption keys. The
keys are used to encrypt every data packet that is wirelessly communicated between the AP and
the wireless clients.
Figure 93 WPA2 with RADIUS Application Example
WPA2-PSK Application Example
A WPA2-PSK application looks as follows.
1 First enter identical passwords into the AP and all wireless clients. The Pre-Shared Key (PSK) must
consist of between 8 and 63 ASCII characters or 64 hexadecimal characters (including spaces and
symbols).
2 The AP checks each wireless client's password and allows it to join the network only if the password
matches.
3 The AP and wireless clients generate a common PMK (Pairwise Master Key). The key itself is not
sent over the network, but is derived from the PSK and the SSID.