A Trust model for peer content delivery overlay networks

Abstract

Enormous content distribution systems improved broadly with the rapid growth of novel and innovative technologies. Peer-to-peer content distribution network technology is such innovative technological improvement which gradually involved to next-generation content delivery networks. Peer-to-peer claims low cost and efficient data distribution. The real influence of Peerto- peer content delivery indicates with the distribution of high demand data in a short period of time. Communications among the nodes of such open network infrastructure commonly perceived as an environment offering both opportunities and threats which are based on trust issues. Thus a trust mechanism is required to establish secure communication between the content delivery nodes. This research produce a novel, decentralized, cooperative and selforganized reputation based trust algorithm to mitigate the security complications. To illustrate the trust model a novel P2P hybrid network infrastructure has been introduced. As discussed later in this thesis the servers of that peer to peer content delivery network are basically arrange in server tiers. The key notion of the research is to validate the trust of the peer before send or accept the traffic. Once the data is retrieved from a target node, peer nodes who involved with the content distribution calculate recommender trust indexes at the recommender side of this peer communication. Simultaneously the target also calculates its own trust index for the related recommender node. Thereafter in order to evaluate trust worthiness of a specific target the trust index of the target will compare and against the recommender trust index of that particular index. Network simulator-2 open source network simulator which supports simulations of large number of existing protocols used as the simulation software in order to simulates the proposed algorithm. Experimental performance evaluation is demonstrated trough the simulation results in order to analyse the trusted and untrusted behaviour of the peer to peer content delivery nodes of the proposed network infrastructure