FIG 5 also illustrates {HEAD ~ the authentication engine} 215 comprising a comparator 515, {TAIL ~ a data splitting module} 520, and a data assembling module 525 
comprising
FIG 5 also illustrates { HEAD ~ the authentication engine } 215 comprising a comparator 515 , { TAIL ~ a data splitting module } 520 , and a data assembling module 525
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH