{HEAD ~ The data processor} 7, wherein the known data comprises the code corresponding to {TAIL ~ a filler bit} 
{ HEAD ~ The data processor } 7 , wherein the known data comprises the code corresponding to { TAIL ~ a filler bit }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL