FIG 20 is a flowchart illustrating {HEAD ~ a process} for {TAIL ~ a reader} authenticating a tag according to embodiments 
FIG 20 is a flowchart illustrating { HEAD ~ a process } for { TAIL ~ a reader } authenticating a tag according to embodiments
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH