{HEAD ~ The service authentication code} is communicated to {TAIL ~ the user} via the communications network and received, or entered, into an authentication device associated with the user  
is communicated to
{ HEAD ~ The service authentication code } is communicated to { TAIL ~ the user } via the communications network and received , or entered , into an authentication device associated with the user
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH