| Michael Kinateder
| creator |
Jøsang, Audun
| | Gray, Elizabeth
| | Kinateder, Michael
| | date |
2006-05
| | | | description |
When transacting and interacting through open computer networks,
traditional methods used in the physical world for establishing
trust can no longer be used. Creating virtual network substitutes
with which people, organizations and software agents can derive
trust in other parties requires computerized analysis of the
underlying trust networks. This article describes an approach to
trust network analysis using subjective logic (TNA-SL), that
consists of the three following elements. Firstly it uses a concise
notation with which trust transitivity and parallel combination of
trust paths can be expressed. Secondly it defines a method for
simplifying complex trust networks so that they can be expressed in
this concise form. Finally it allows trust measures to be expressed
as beliefs, so that derived trust can be automatically and securely
computed with subjective logic. We compare our approach with trust
derivation algorithms that are based on normalization such as
PageRank and EigenTrust. We also provide a numerical example to
illustrates how TNA-SL can be applied.
| |