However, {TAIL ~ the authentication device} or method may also be used to authenticate a user to {HEAD ~ the remote service}, or indeed, mutually authenticate a remote service and a user 
However , { TAIL ~ the authentication device } or method may also be used to authenticate a user to { HEAD ~ the remote service } , or indeed , mutually authenticate a remote service and a user
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH