Trust can be classified into different primitive trust classes. Each trust aspect is associated with different characteristics of the trusted entity. Consequently, trust of one entity in another in one aspect does not necessarily imply trust of the first entity in the second in any other aspect.
In protocols in realistic wide-area-network settings, an entity may receive multiple statements from multiple sources. Each source may be associated with different trust characteristics. The receipient needs to draw consistent conclusions given these multiple statements. A reasoning framework that guarantees valid deductions in the face of multiple statements is presented. We demonstrate aspects of that framework in the context of example protocols.
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