A Service-Oriented Fuzzy Reputation System to Increase the Security of a Broadband Wireless Metropolitan Network

The increasing development of the Wireless MAN technologies will allow the exchange of services directly among subscriber stations. In order to keep the network scalability, schemes to assure the safety of services should preferably adopt a distributed architecture, such as the Reputation Systems architectures, commonly used in Peer-to-Peer Networks. Reputation Systems have the goal of evaluating individual peers, relying on their previous interactions in the network. We propose the use of a service-oriented Reputation System based on Fuzzy Logic, as a solution to increase the security at the service level of a Wireless MAN. The paper presents the description of the proposed system and the simulations performed to evaluate it in a wireless network environment.