For example, the signature key generator 123 may look for {HEAD ~ a directory} that is named after {TAIL ~ the signature key} 
is named after
For example , the signature key generator 123 may look for { HEAD ~ a directory } that is named after { TAIL ~ the signature key }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL