An integrated circuit for {HEAD ~ a Radio Frequency Identification reader} configured to communicate with an RFID tag that stores a first code, determines {TAIL ~ a response} to a challenge, and backscatters the first code responsive to receiving a first command, the integrated circuit configured to: 
An integrated circuit for { HEAD ~ a Radio Frequency Identification reader } configured to communicate with an RFID tag that stores a first code , determines { TAIL ~ a response } to a challenge , and backscatters the first code responsive to receiving a first command , the integrated circuit configured to :
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH