关键词: 网络虚拟化；虚拟网络映射；安全；信任

Abstract: Against the new security threats brought by the network virtualization technology, the concepts of trust relationship and trust degree were introduced into the virtual network resource allocation phase. Security issues in the network virtualization environment were quantitative analyzed. A mathematical model of the secure virtual network embedding problem was modeled in order to reduce the cost. The local and global importance of network nodes were considered in the mapping phase. The network nodes were ranked by TOPSIS method, and a trust-aware virtual network embedding heuristic algorithm was proposed. Simulation results show that the proposed algorithm performs better in acceptance ratio, revenue and resource utilization.

Key words: network virtualization; virtual network embedding; security; trust