In this paper we suggest improvements that
should be easy to adopt within the existing hidden service design,
improvements that will both reduce vulnerability to DoS attacks and
add QoS as a service option. In addition we show how to hide not
just the location but the existence of the hidden service from
everyone but the users knowing its service address.
Escrow service! All transactions pass through the Escrow service. This is how normal credit card processing works, and it provides the buyer with a level of protection because they can dispute a transaction that went wrong.