Dependable Overlay Networks

Today, peer-to-peer (P2P) systems are used as a promising platform to deploy new applications and services in the internet. There are much interest in emerging P2P overlay network because they provide a good substrate for creating large scale data sharing, content distribution and application-level multicast applications. Overlay networks also have following advantages: redundant storage, efficient query search, anonymity, fault-tolerance, trust and authentication.This paper compares and analyzes various types of P2P overlay networks from dependability view. Main topics of comparison and analysis are scalability, reliability, security, availability, integrity and anonymity. We verify dependability analysis of P2P overlay networks by simulation. Both analysis and simulation results show that the purely structured decentralized type (e.g.Chord) is the most dependable P2P overlay network.