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