Edimax EW-7128g User Manual page 15

Authentication vs. Security
Parameter
Authentication Type
Description
This setting has to be consistent with the wireless networks that
the card intends to connect.
None – No authentication is needed among the wireless network.
Shared – Only wireless stations using a shared key (WEP Key
identified) are allowed to connecting each other.
WPA-PSK –It is a special mode designed for home and small
business users who do not have access to network authentication
servers. In this mode, known as Pre-Shared Key, the user
manually enters the starting password in their access point or
gateway, as well as in each wireless stations in the network. WPA
takes over automatically from that point, keeping unauthorized
users that don't have the matching password from joining the
network, while encrypting the data traveling between authorized
devices. The encryption methods are including TKIP and AES.
Note that this option is only available for Windows XP.
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