Enhancing Security in LLNs Using a Hybrid Trust-Based Intrusion Detection System for RPL

An extensive worldwide network known as the Internet of Things (IoT) links different electronic devices and facilitates easy communication and group work. This interdependency is especially apparent in Low Power and Lossy Networks (LLNs), where resource-constrained devices adhere to specified protocols for effective communication. Such systems frequently use Routing Protocol for LLNs (RPL). Nevertheless, due to its basic simplicity, there are numerous ways to exploit it, thereby compromising network security. It is also difficult to carry out complex computational operations on LLNs due to their resource constraints. A highly developed system called the Trust-Based Intrusion Detection System for RPL (TIDSRPL) is presented in this research study. Complex trust computations are offloaded to the root node by TIDSRPL, which assesses node trust based on network behavior. Reduce the possibility of resource depletion with this strategic transfer that preserves energy, storage, and computational resources at the node level. Comparative analysis with the default RPL Objective Function (OF), MRHOF-RPL, demonstrates TIDSRPL’s superior efficacy in detecting and isolating malicious nodes engaged in Sinkhole, Selective forwarding, and Sybil attacks. Notably, TIDSRPL exhibits a 20-35% reduction in average packet loss ratio and attains 33-45% greater energy efficiency compared to MRHOF-RPL, reinforcing its robustness in securing LLN operations.