Re-traffic Pricing for Fighting against DDoS

Our proposed design, which we refer to as re-traffic pricing (RTP), aims to defense against application-level distributed denial-of-service (App-DDoS) attacks which is a rapidly growing problem. RTP prevents the server form overloading and encourages all the users to spend re-traffic which the legitimate users are assumed to have more of than the attackers to bid for the service resources. We apply the re-traffic which we define as the bandwidth uploaded after encouragement to the server as the constrained resource in this paper. The goal of RTP architecture is to allocate service resources in rough proportion to the users´ re-traffic. On account of this mechanism, legitimate clients with greater re-traffic will receive the bulk of the service.