This document specifies EAP-PSK, an Extensible Authentication
Protocol (EAP) method for mutual authentication and session key
derivation using a Pre-Shared Key (PSK). EAP-PSK provides a
protected communication channel when mutual authentication is
successful for both parties to communicate over. This document
describes the use of this channel only for protected exchange of
result indications, but future EAP-PSK extensions may use the channel
for other purposes. EAP-PSK is designed for authentication over
insecure networks such as IEEE 802.11.