In this paper, we propose a trust management framework for network virtualization environments. The proposed framework helps distinguish among the infrastructure providers based on their past experiences and feedbacks from service providers. We describe the main components involved in gathering the feedbacks and managing the reputation data. We detail the proposed trust system and we define the concept of Degree of Involvement of an infrastructure provider in terms of nodes and links. We also

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... rform a mathematical analysis of the proposed system. Simulation results confirm the effectiveness of the proposed trust management system in increasing the service providers' satisfaction and reducing the selection of infrastructure providers that do not fulfill their Service Level Agreement (SLA).