Secure virtual network embedding to mitigate the risk of covert channel attacks

Network virtualization is a double-edged sword that facilitates network innovation but may cause information leakage between virtual nodes coexisting on the same substrate node via covert channels. This paper represents the first attempt to consider risk-tolerant coexistence in virtual network embedding. We propose a secure virtual network embedding scheme to mitigate the risk of covert channel attacks. Simulation results show that our scheme improves the percentage of secure virtual nodes by 40%.