When the terminal transmits an attribute certificate issuance request message in {HEAD ~ response} to {TAIL ~ this message}, the terminal transmits an attribute certificate issuance message to the terminal  
to
When the terminal transmits an attribute certificate issuance request message in { HEAD ~ response } to { TAIL ~ this message } , the terminal transmits an attribute certificate issuance message to the terminal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH