Date Added: Nov 2011
Information systems are being shifted to scalable architectures like Cloud and Peer-To-Peer (P2P) models. In this paper, the authors consider the P2P model as a fully distributed, scalable system different from centralized coordinated systems in Cloud and Grid systems. A P2P system is composed of peer processes (peers). Here, applications are realized by activities of peers and cooperations among multiple peers. In P2P systems, since there is no centralized coordination, each peer has to obtain information about other peers by itself. In the group cooperation, each group member peer has to be trustworthy so that malicious behavior of a member peer cannot affect overall outcome of the whole group.