This decentralized procedure allows new users access to {HEAD ~ the network} without having to physically access a centralized facility to present {TAIL ~ their credentials} 
This decentralized procedure allows new users access to { HEAD ~ the network } without having to physically access a centralized facility to present { TAIL ~ their credentials }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL