Open AccessPathTrust: A Trust-Based Reputation Service for Virtual Organization Formation
Author(s) -
Florian Kerschbaum,
Jochen Haller,
Yücel Karabulut,
Philip Robinson
Publication year - 2006
Publication title -
lecture notes in computer science
Language(s) - English
Resource type - Book series
SCImago Journal Rank - 0.249
H-Index - 400
eISSN - 1611-3349
pISSN - 0302-9743
ISBN - 3-540-34295-8
DOI - 10.1007/11755593_15
Subject(s) - reputation , computer science , virtual organization , exploit , transitive relation , reputation system , task (project management) , service (business) , virtual community , graph , computer security , knowledge management , world wide web , the internet , theoretical computer science , business , social science , geometry , mathematics , management , combinatorics , marketing , sociology , economics , grid
Virtual Organizations enable new forms of collaboration for businesses in a networked society. During their formation business partners are selected on an as-needed basis. We consider the problem of using a reputation system to enhance the member selection in Virtual Organizations. The paper identifies the requirements for and the benefits of using a reputation system for this task. We identify attacks and analyze their impact and threat to using reputation systems. Based on these findings we propose the use of a specific model of reputation different from the prevalent models of reputation. The major contribution of this paper is an algorithm (called PathTrust) in this model that exploits the graph of relationships among the participants. It strongly emphasizes the transitive model of trust in a web of trust. We evaluate its performance, especially under attack, and show that it provides a clear advantage in the design of a Virtual Organization infrastructure.
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