A framework is provided that decouples {HEAD ~ credential acquisition} from authentication processes using those credentials in a way that facilitates {TAIL ~ dynamic update} of credential information 
A framework is provided that decouples { HEAD ~ credential acquisition } from authentication processes using those credentials in a way that facilitates { TAIL ~ dynamic update } of credential information
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH