PATROL-F – a comprehensive reputation-based trust model with fuzzy subsystems

Authors:
Ayman Tajeddine;Ayman Kayssi;Ali Chehab;Hassan Artail
Affiliations:
Department of Electrical and Computer Engineering, American University of Beirut, Beirut, Lebanon;Department of Electrical and Computer Engineering, American University of Beirut, Beirut, Lebanon;Department of Electrical and Computer Engineering, American University of Beirut, Beirut, Lebanon;Department of Electrical and Computer Engineering, American University of Beirut, Beirut, Lebanon
Venue:
ATC'06 Proceedings of the Third international conference on Autonomic and Trusted Computing
Year:
2006

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Abstract

In this paper, we present PATROL-F, a comprehensive model for reputation-based trust incorporating fuzzy subsystems to protect interacting hosts in distributed systems. PATROL-F is the fuzzy version of our previous model PATROL, and aims at achieving a truly unique model incorporating various concepts that are important for the calculation of reputation values and the corresponding trust decisions. Among the incorporated concepts are direct experiences and reputation values, the credibility of a host to give recommend-dations, the decay of information with time based on a dynamic decay factor, first impressions, and a hierarchy of host systems. The model also implements the concepts of similarity, popularity, activity, and cooperation among hosts. In addition, PATROL-F includes fuzzy subsystems to account for humanistic and subjective concepts such as the importance of a transaction, the decision in the uncertainty region, and setting the value of result of interaction. We present simulations of PATROL-F and show its correctness and reliability.