A Dempster-Shafer Theory Based Witness Trustworthiness Model

The problem of unfair testimonies remains to be a big concern in reputation systems. To address this problem, we propose a witness trustworthiness model based on Dempster-Shafer theory for reputation systems using multi-nominal testimonies. The proposed approach uses Dempster-Shafer theory to model a witness’s trustworthiness from both personal and public aspects. Experimental evaluation demonstrates promising results of the proposed approach in modeling witnesses ’ trustworthiness and adapting to the buyer specified subjective difference tolerance level