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