Secure Reputation System Based on Group Transitivity And Peer''s Classification for Peer-to-Peer Networks

• Main Authors: KONE Mamadou, 康諾
• Other Authors: 曾育民
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/34721357221617985008

碩士 === 國立中興大學 === 資訊科學系所 === 94 === Peer-to-peer (P2P) systems are gaining a wide popularity in actual networks, due to their decentralized structure in offering services to users. The inherent problem of such an open and anonymous environment is its weakness to attackers. A reputation system is believed to be a solution to alleviate or even stop malicious peers from harming the system. However, this reputation system should be strong enough, well designed and based on certain rules to discourage attackers and inject trust and incentives to participation into the system. In this paper, we propose a secure reputation system based on group transitivity where every requester and provider is selected according to her reputation and participation in the community service. The network is organized by area, each having a manager responsible for handling its peers’ access to other groups’ peers. In every area the transactions between the different peers and Area Managers are insured through different protocols that we designed for this purpose. A self-certification generating a Simple Distributed Security Infrastructure (SDSI) certificate is used for each transaction’s signature and uniquely identifies every peer in the network. We believe that this kind of reputation system where no contribution results in no service will have its domain of application in the large world of P2P network.