For example, {HEAD ~ a hash} of {TAIL ~ an identity} may be checked for in a whitelist instead of an identity 
of
For example , { HEAD ~ a hash } of { TAIL ~ an identity } may be checked for in a whitelist instead of an identity
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH