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On merging two trust-networks in one with bipolar preferences

Published online by Cambridge University Press:  01 June 2015

STEFANO BISTARELLI
Affiliation:
Dipartimento di Matematica a Informatica, Università di Perugia, Italy Email: bista@dmi.unipg.it
FRANCESCO SANTINI
Affiliation:
Istituto di Informatica e Telematica, IIT-CNR, Pisa, Italy Email: francesco.santini@iit.cnr.it
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Abstract

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In this paper, we study weighted trust-networks (but also unweighted), where each edge is associated with either a positive or a negative score. Hence, we consider a distrust relationship as well, allowing a user to rate poor experiences with other individuals in his web of acquaintances. We propose an algorithm to compose two of such networks in a single one, in order to merge the knowledge obtained in two different communities of individuals (possibly partially-overlapping), through two different trust management-systems. Our algorithm is based on semiring algebraic-structures, in order to have a parametric computational-framework. Such composition can be adopted whenever two trust-based communities (with the same scope) need to be amalgamated: for instance, two competitor-companies that need to unify the trust-based knowledge on their (sub-) suppliers.

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Paper
Copyright
Copyright © Cambridge University Press 2015