A multilevel trust management framework in pervasive environment is proposed in this paper. In the framework, the trust, the reputation, reciprocity and related concepts are defined newly. The multilevel discrete trust metric finds a good way to solve the problems, which the granularity of binary trust is coarse and the calculation of continuous trust is complex. The design of storage counter in the framework makes up the deficiency that storage capacity of pervasive devices is limited. The experimental result indicates preliminarily that the multilevel trust metric has good effect on trusted authentication in pervasive environment.
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