In some embodiments {HEAD ~ the reader} may use {TAIL ~ the ID} to help identify the proper signing authority, or may use the ID to help identify which SAPK to use from a given signing authority 
In some embodiments { HEAD ~ the reader } may use { TAIL ~ the ID } to help identify the proper signing authority , or may use the ID to help identify which SAPK to use from a given signing authority
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL 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 OTH OTH OTH