A Reputation Model Based on Testimonies
نویسندگان
چکیده
Reputation mechanisms are being used to increase the reliability and performance of virtual societies. Different decentralized reputation models have been proposed based on interactions among agents. Each system agent evaluates and stores the reputations of the agents with whom they have interacted and can also testify to other agents about such reputations. The main disadvantages of such approaches when applied to open large-scale multi-agent systems are the difficulty of establishing strong links between the agents and the sometimes infeasible witness search process. In this paper we propose a hybrid reputation system with centralized and decentralized characteristics to overcome such problems. The reputations are provided by the system agents themselves but also by centralized sub-systems that can be easily reached by any agent and can supply reliable reputations of any agent based on testimonies about undesired agent's behavior. Such behavior is characterized by the violation of system
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