At operation 2006 the reader verifies {HEAD ~ the TPK} using {TAIL ~ the SAPK} and ES 
using
At operation 2006 the reader verifies { HEAD ~ the TPK } using { TAIL ~ the SAPK } and ES
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH