Observations
1. How to identify the fast re-authentication?
For ERP, two new EAP codes (Initiate, Finish) are
specified for re-authentication.
For EAP-AKA, a special identity (fast re-
authentication identity) is generated to support re-
authentication. The identity is one-time identity. The
new identity is delivered during re-authentication
processing.
O1:The identity is one-time identity, which is delivered
within EAP-AKA exchange each time. It brings one
more round trip time.