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As for the functionality of trust representation, completeness is the first aspect to be
considered; next is the accuracy measurement of trust representation. Because there are
diverse trust factors involved in federated trust management, systems' capabilities to
accommodate these diverse trust factors are also important. These trust factors can be
classified into objective factors and subjective factors. Objective factors include
various facts and other objectively measurable elements in federated trust management.
Objective factors can be classified into three categories: identity information, privilege
information and trust knowledge. Network setup configuration information includes a representative
element (identification number or name) and other credential information. Privilege
information describes allowable actions and behaviors in a system. Trust knowledge
covers other supportive information for establishment, monitoring and enforcement of
trust relationships. Subjective factors include trust intentions (represented in policies)
and reputations (represented in trust values).
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