DISRS - A Distributed Infrastructure for Secure Reputation Services

This project investigates necessary requirements of Reputation Services that are to work on top of a distributed infrastructure such as a Peer-to-Peer network. The aim of a Reputation Service is to engender trust between trading partners in potentially global e-marketplaces by collecting, aggregating, analysing, and interpreting ratings/feedback participants give each other at the end of a transaction.

In order to assess the efficacy and efficiency of a solution meeting these requirements, the project so far has proposed metrics, which can not only be used to evaluate current systems, but also to guide the design of new systems.

Infrastructure aspects and security considerations affecting application-level services, too, have been reviewed and suggestions to solve pertinent issues are proposed.

Currently, our efforts concentrate on exploring and devising a Peer-to-Peer infrastructure that is capable of storing reputation data reliably since current Peer-to-Peer networks are either efficient in retrieval but unreliable in data storage or vice versa.

• 4-10.044V
  Dietrich Fahrenholtz, Volker Turau: Fluctuation in Peer-to-Peer Networks: Mitigating Its Effect on DHT Performance. Report arXiv:cs.NI/0406027 v1, arXiv.org e-Print archive, Cornell University, June 2004.
• 4-10.046V
  Dietrich Fahrenholtz, Volker Turau: A Tree-based DHT Approach to Scalable Weakly Consistent Data Management. In: Proceedings of the 1st International Workshop on P2P Data Management, Security and Trust, p. 991 - 998. IEEE Computer Society Press, August 2004.
• 4-10.057V
  Dietrich Fahrenholtz, Andreas Wombacher, and Volker Turau. Performance of Lookup Operations in a Hypercube-based P2P Data Store: Theoretical Model and Performance Evaluation. Report No. TR-2005-12-01, URN: urn:nbn:de:gbv:830-opus-1057, Hamburg University of Technology, Hamburg, Germany, December, 2005.
• 4-10.059V
  Dietrich Fahrenholtz, and Andreas Wombacher. A Formal Communication Model for Lookup Operations in a Hypercube-based P2P Data Store. In Proceedings of the 1st International Conference on n Collaborative Computing: Networking, Applications and Worksharing. San Jose, USA, December 19-21, 2005.

Stichwörter

• Peer-to-Peer Networks
• Questionnaires
• Reputation Services
• Security
• XML
• e-Commerce