In {TAIL ~ step} 204, {HEAD ~ the signature key generator} 123 checks to see if there is already a directory for the generated signature key 
In
In { TAIL ~ step } 204 , { HEAD ~ the signature key generator } 123 checks to see if there is already a directory for the generated signature key
REL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH