Reference: Martine De Cock; Pinheiro da Silva, P. A Many Valued Representation and Propagation of Trust and Distrust. Technical Report, Knowledge Systems, AI Laboratory, Stanford University. 2005.
Abstract: As the amount of information on the web grows, users may find increasing challenges in trusting and sometimes distrusting sources. One possible aid is to maintain a network of trust between sources. In this paper, we propose to model such a network as an intuitionistic fuzzy relation. This allows to elegantly handle together the problem of ignorance, i.e. not knowing whether to trust or not, and vagueness, i.e. trust as a matter of degree. We pay special attention to deriving trust information through a trusted third party, which becomes especially challenging when distrust is involved.
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