.B psk
for pre-shared key authentication and
.B eap
-to (require the) use of the Extensible Authentication Protocol. In the case
-of
+to (require the) use of the Extensible Authentication Protocol.
+To require a trustchain public key strength for the remote side, specify the
+key type followed by the strength in bits (for example
+.BR rsa-2048
+or
+.BR ecdsa-256 ).
+For
.B eap,
an optional EAP method can be appended. Currently defined methods are
.BR eap-aka ,