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The attacks such as Denial of Service (DoS) violate the security of Network-on-Chip (NoC) which emerges as a promising solution for multi-core system. In this paper, we explore the robustness of mesh-based NoC architecture under various flooding-based DoS attacks. Simulation results reveal that the robustness of NoC architecture can be correlated with parameters such as routing algorithm, the number and positions of attacked nodes. It indicates that deterministic routing algorithm xy will result in less performance degradation than using other four adaptive routing algorithms studied in this paper when the attack traffic rate is lower than 0.65. However, the opposite conclusion can be made if much higher attack traffic rate is used. The performance degradation would escalate with the increasing number of attacked nodes. Moreover, the locations of attacked nodes will have an impact on the degree of performance degradation. Last but not least, some design guidelines for NoC against DoS attacks are proposed.

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