Trust based reliable and secure routing in peer-to-peer overlay networks

Increasingly on the Internet, applications arc supported by sets of loosely connected machines operating without any form of central coordination and more complex than classical distributed system. Peer-to-peer networking, a disruptive technology for large scale distributed applications, has gained widespread attention due to the successes of peer-to-peer (P2P) content sharing, media streaming, and telephony applications. Peer-to-peer systems are implemented using an abstract overlay network (An overlay network is a computer network which is built on the top of another network) which makes the P2P system independent from the physical network topology. But current overlays network are not secure; even a small segment of malicious nodes can avoid accurate message delivery throughout the overlay network. This problem is particularly serious in open peer-to-peer systems, where many diverse, sovereign parties without previous trust relationships wish to pool their resources. This paper studies types, categories, characteristics and network applications of peer-to-peer (P2P) overlay networks. Also will review and analyze the type of peer-to- peer (P2P) current security attacks and then will present our Hybrid secure routing mechanism in peer- To- peer overlay networks to overcome the security challenges.