AirLive WH-5420CPE - Manual (Page 57)

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WPA-PSK (TKIP) / WPA-PSK (AES)
Wi-Fi Protected Access (WPA) with Pre-Shared Key (PSK) provides better security than
WEP keys. It does not require a RADIUS server in order to provide association
authentication, but you do have to enter a shared key for the authentication purpose. The
encryption key is generated automatically and dynamically.
There are two encryption types TKIP and CCMP (AES). While CCMP provides better
security than TKIP, some wireless client stations may not be equipped with the hardware to
support it.
Pre-shared Key: This is an ASCII string with 8 to 63 characters. Please make sure that
both the WH-5420CPE and the wireless client stations use the same key.
Group Key Life Time: A group key is used for multicast/broadcast data, and the re-key
interval is time period that the system will change the group key periodically. The shorter
the interval is, the better the security is. The default is 300 sec.