Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Trust and Reputation in Peer-to-Peer Systems

  • Zoran DespotovicEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1225


Feedback systems; Word of mouth


Trust means reliance on something or someone’s action. As such, it involves risks on the side of the subject of trust, i.e., trustor. Reducing these risks is the main goal of a trust management system. A possible way to do this is through reputation management, i.e., reputation systems.

In a typical large scale online setting, be it on the Web or in P2P networks, it is necessary to learn more about prospective transaction partners prior to engaging in a transaction with them. The size of such systems makes it highly improbable to meet the same partner repeatedly, so own experience is of little use. The types of the performed transactions are often such that well-established forms of quality assurance (e.g., contracts) are highly inefficient. Under such circumstances, reputation systems (“word of mouth” [1]) turn out to be the only viable mechanism to encourage trustworthy behavior and guide people to decide whom to trust and to what...

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.NTT DoCoMo Communications Laboratories EuropeMunichGermany

Section editors and affiliations

  • Karl Aberer
    • 1
  1. 1.Distributed Inf. Sys Lab.Inst. for Core Computing Science (IIF), EPFL-IC-IIF-LSIRLausanneSwitzerland