JCS_V6_N1_RP2 Hanafy M. Ali Journal on Communication Engineering and Systems 2277-5242 6 1 9 21 P2P Networks, NS-2, Routing Protocol, ACO, AntNet, Reputation With the rapid development of computer network techniques and novel concepts of distributed computing, many of the modifying researchers are now facing new challenges on how to merge some old protocols to take the advantage of each of them to create a new technique stack that has a lot of advantages in various directions providing us an effective use and solving complex problems. Peer-to-Peer (P2P) network based network technology is grabbing more attention due to its feasibility to build applications. In this paper, the author has focused on the development of a new improvement algorithm based on P2P network environment, and presented the details of implementations with some basic performance evaluations. The main goal of the paper is to present a new algorithm that provides us with a lot of facilities like shortest path, focusing on to the security problems. So the integrated architecture gives us good results as the choice of the shortest path with, more trust bath that is based on the reputation values of end nodes. The reputation is defined to express subjective trustable relationship among individuals and objective trust view. The recommended routing algorithm depends on the reputation values and metric value. Finally, by this routing algorithm, the P2P network performance is greatly enhanced. November 2016 - January 2017 Copyright © 2017 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=10377