Flow-based reputation: more than just ranking (original) (raw)

Towards An Effective Reputation Assessment Process In Peer-To-Peer Systems

2007

The need for reputation assessment is particularly strong in peer-to-peer (P2P) systems because the peers' personal site autonomy is amplified by the inherent technological decentralization of the environment. However, the decentralization notion makes the problem of designing a peer-to-peer based reputation assessment substantially harder in P2P networks than in centralized settings.Existing reputation systems tackle the reputation assessment process in an ad-hoc manner. There is no systematic and coherent way to derive measures and analyze the current reputation systems. In this paper, we propose a reputation assessment process and use it to classify the existing reputation systems. Simulation experiments are conducted and focused on the different methods in selecting the recommendation sources and retrieving the recommendations. These two phases can contribute significantly to the overall performance due to communication cost and coverage.

Reputation-Based Trust Systems for P2P Applications: Design Issues and Comparison Framework

In Peer-to-Peer (P2P) computing area trust issues have gained focus as a result of the decentralized nature of P2P systems where autonomous peers interact with each other without relying on any central authority. There is, thus, the need of a trust system to ensure a level of robustness against malicious nodes. Various reputation-based trust models have been proposed for P2P systems which use similar concepts but focus on different aspects and address different set of design issues. As a result, there is a clear need to investigate the design aspects of reputation-based trust systems that could be deployed in P2P applications. In this paper we present the basic elements and design issues of such systems and compare representative approaches, aiming at supporting the design of reputation systems suitable for particular P2P applications.