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Trust Management and Trust Theory Revision
Systems, Man and Cybernetics, Part A, IEEE Transactions on, 36 (3): 451--460 (2006)
Аннотация
A theory of trust for a given system consists of a set of rules that
describe trust of agents in the system. In a certain logical framework,
the theory is generally established based on the initial trust of
agents in the 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 in a dynamic environment,
the theory established based on the initial trust of agents in the
system must be revised, otherwise it can no longer be used for any
security purpose. This paper investigates the factors influencing
trust of agents and discusses how to revise theories of trust in
dynamic environments. A methodology for revising and managing theories
of trust for multiagent systems is proposed. This methodology includes
a method for modeling trust changes, a method for expressing theory
changes, and a technique for obtaining a new theory based on a given
trust change. The proposed approach is very general and can be applied
to obtain an evolving theory of trust for agent-based systems.
