Abstract:

In open network, the usage and fuzzy set theory have been used to model the issues of trust management. The definition of trust class and the algorithm of trust-computing are discussed. By presenting the affinities coefficient, the derivation algorithm of trust has a good ability of shielding on malicious nodes. At the same time, the problem of how to define the malicious nodes and how to init the trustworthiness of the nodes are resolved. The cloud model is extended to define the trust model in formation and the parameters are discussed in detail. By proving the time decay coefficient and usage effecting coefficient, the fuzziness and dynamic variation characters are considered and resolved. The experiments are also designed to evaluate the correctness and performances of the proposed algorithm.

Key words: trust management, usage control, affinities coefficient, cloud model