wpa-psk

from The Free On-line Dictionary of Computing (8 July 2008)

Wi-Fi Protected Access Pre-Shared Key
WPA Pre-Shared Key
WPA-PSK

   <networking, security> (WPA-PSK) A simplified but still
   powerful form of {WPA}, most suitable for home {wireless
   networking}.  As with {WEP}, you set a static key or pass
   phrase, but WPA-PSK uses {TKIP} to automatically change the
   keys periodically, making it much more difficult to break the
   encryption.

   (2007-05-11)