Managing Theories of Trust in Agent Based Systems

摘要

A theory of trust for a given system is a set of rules that describes trust of agents in the system. In a certain logical framework, the theory is generally established based on the initial trust of agents in security mechanisms of the system. Such a theory provides a foundation for reasoning about agent beliefs as well as security properties that the system may satisfy. However, trust changes dynamically. When agents lose their trust or gain new trust, the theory established based on the initial trust of agents must be revised, otherwise it can no longer be used for any security purpose. This paper proposes a methodology for revising and managing dynamic theories of trust for agent based systems.