Dynamic and comprehensive trust model for IoT and its integration into RPL

Ensuring security in IoT routing protocols is more challenging due to the fact that devices are mobile, resource constrained, and heterogeneous. The routing protocol for low-power and lossy networks (RPL) as the de facto routing protocol for IoT provides a little protection against routing attacks. On the other hand, the standard RPL because of the use of a single metric in routing has limitations that ultimately results in loss of network performance. To overcome the limitations of the use of a single metric and to prevent the consequences of routing attacks, we used the concept of trust and propose dynamic and comprehensive trust model for IoT (DCTM-IoT) and integrate it into RPL (DCTM-RPL). We provide a comprehensive hierarchical model for trusting of things in IoT, which has a multi-dimensional vision of trust. We put the combination of metrics and necessary activities to deal with attacks under the umbrella of trust level calculation. The performance of DCTM-RPL is compared with the standard RPL protocol in mobile environment and under routing major attacks. DCTM-RPL demonstrates its superior performance over the standard RPL protocol in the detection and isolation attacks. The DCTM-RPL, in addition to resistance mitigating routing attacks, improves network performance.