We propose countermeasures to harden the NoC design, rather than fully relying on software or firmware solutions to detect a compromised NoC used in the MPSoC. Our router-level HT mitigation mechanism raises the bar for an adversary to simultaneously control multiple routing hops to create a malicious communication path between two IP cores in the NoC-based MPSoC. The proposed collaborative dynamic permutation and flit integrity check method is capable of examining the invariables of NoC to immediately terminate the detected HTs.