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